ee14373ed9f75485a91b9dc3b93283f8e4eafcd9
1 /**
2 * collectd - src/java.c
3 * Copyright (C) 2009 Florian octo Forster
4 * Copyright (C) 2008 Justo Alonso Achaques
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Florian octo Forster <octo at verplant.org>
21 * Justo Alonso Achaques <justo.alonso at gmail.com>
22 **/
24 #include "collectd.h"
25 #include "plugin.h"
26 #include "common.h"
27 #include "filter_chain.h"
29 #include <pthread.h>
30 #include <jni.h>
32 #if !defined(JNI_VERSION_1_2)
33 # error "Need JNI 1.2 compatible interface!"
34 #endif
36 /*
37 * Types
38 */
39 struct cjni_jvm_env_s /* {{{ */
40 {
41 JNIEnv *jvm_env;
42 int reference_counter;
43 };
44 typedef struct cjni_jvm_env_s cjni_jvm_env_t;
45 /* }}} */
47 struct java_plugin_class_s /* {{{ */
48 {
49 char *name;
50 jclass class;
51 jobject object;
52 };
53 typedef struct java_plugin_class_s java_plugin_class_t;
54 /* }}} */
56 #define CB_TYPE_CONFIG 1
57 #define CB_TYPE_INIT 2
58 #define CB_TYPE_READ 3
59 #define CB_TYPE_WRITE 4
60 #define CB_TYPE_FLUSH 5
61 #define CB_TYPE_SHUTDOWN 6
62 #define CB_TYPE_LOG 7
63 #define CB_TYPE_NOTIFICATION 8
64 #define CB_TYPE_MATCH 9
65 #define CB_TYPE_TARGET 10
66 struct cjni_callback_info_s /* {{{ */
67 {
68 char *name;
69 int type;
70 jclass class;
71 jobject object;
72 jmethodID method;
73 };
74 typedef struct cjni_callback_info_s cjni_callback_info_t;
75 /* }}} */
77 /*
78 * Global variables
79 */
80 static JavaVM *jvm = NULL;
81 static pthread_key_t jvm_env_key;
83 /* Configuration options for the JVM. */
84 static char **jvm_argv = NULL;
85 static size_t jvm_argc = 0;
87 /* List of class names to load */
88 static java_plugin_class_t *java_classes_list = NULL;
89 static size_t java_classes_list_len;
91 /* List of config, init, and shutdown callbacks. */
92 static cjni_callback_info_t *java_callbacks = NULL;
93 static size_t java_callbacks_num = 0;
94 static pthread_mutex_t java_callbacks_lock = PTHREAD_MUTEX_INITIALIZER;
96 static oconfig_item_t *config_block = NULL;
98 /*
99 * Prototypes
100 *
101 * Mostly functions that are needed by the Java interface (``native'')
102 * functions.
103 */
104 static void cjni_callback_info_destroy (void *arg);
105 static cjni_callback_info_t *cjni_callback_info_create (JNIEnv *jvm_env,
106 jobject o_name, jobject o_callback, int type);
107 static int cjni_callback_register (JNIEnv *jvm_env, jobject o_name,
108 jobject o_callback, int type);
109 static int cjni_read (user_data_t *user_data);
110 static int cjni_write (const data_set_t *ds, const value_list_t *vl,
111 user_data_t *ud);
112 static int cjni_flush (cdtime_t timeout, const char *identifier, user_data_t *ud);
113 static void cjni_log (int severity, const char *message, user_data_t *ud);
114 static int cjni_notification (const notification_t *n, user_data_t *ud);
116 /* Create, destroy, and match/invoke functions, used by both, matches AND
117 * targets. */
118 static int cjni_match_target_create (const oconfig_item_t *ci, void **user_data);
119 static int cjni_match_target_destroy (void **user_data);
120 static int cjni_match_target_invoke (const data_set_t *ds, value_list_t *vl,
121 notification_meta_t **meta, void **user_data);
123 /*
124 * C to Java conversion functions
125 */
126 static int ctoj_string (JNIEnv *jvm_env, /* {{{ */
127 const char *string,
128 jclass class_ptr, jobject object_ptr, const char *method_name)
129 {
130 jmethodID m_set;
131 jstring o_string;
133 /* Create a java.lang.String */
134 o_string = (*jvm_env)->NewStringUTF (jvm_env,
135 (string != NULL) ? string : "");
136 if (o_string == NULL)
137 {
138 ERROR ("java plugin: ctoj_string: NewStringUTF failed.");
139 return (-1);
140 }
142 /* Search for the `void setFoo (String s)' method. */
143 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
144 method_name, "(Ljava/lang/String;)V");
145 if (m_set == NULL)
146 {
147 ERROR ("java plugin: ctoj_string: Cannot find method `void %s (String)'.",
148 method_name);
149 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
150 return (-1);
151 }
153 /* Call the method. */
154 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, o_string);
156 /* Decrease reference counter on the java.lang.String object. */
157 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
159 return (0);
160 } /* }}} int ctoj_string */
162 static int ctoj_int (JNIEnv *jvm_env, /* {{{ */
163 jint value,
164 jclass class_ptr, jobject object_ptr, const char *method_name)
165 {
166 jmethodID m_set;
168 /* Search for the `void setFoo (int i)' method. */
169 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
170 method_name, "(I)V");
171 if (m_set == NULL)
172 {
173 ERROR ("java plugin: ctoj_int: Cannot find method `void %s (int)'.",
174 method_name);
175 return (-1);
176 }
178 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
180 return (0);
181 } /* }}} int ctoj_int */
183 static int ctoj_long (JNIEnv *jvm_env, /* {{{ */
184 jlong value,
185 jclass class_ptr, jobject object_ptr, const char *method_name)
186 {
187 jmethodID m_set;
189 /* Search for the `void setFoo (long l)' method. */
190 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
191 method_name, "(J)V");
192 if (m_set == NULL)
193 {
194 ERROR ("java plugin: ctoj_long: Cannot find method `void %s (long)'.",
195 method_name);
196 return (-1);
197 }
199 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
201 return (0);
202 } /* }}} int ctoj_long */
204 static int ctoj_double (JNIEnv *jvm_env, /* {{{ */
205 jdouble value,
206 jclass class_ptr, jobject object_ptr, const char *method_name)
207 {
208 jmethodID m_set;
210 /* Search for the `void setFoo (double d)' method. */
211 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
212 method_name, "(D)V");
213 if (m_set == NULL)
214 {
215 ERROR ("java plugin: ctoj_double: Cannot find method `void %s (double)'.",
216 method_name);
217 return (-1);
218 }
220 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
222 return (0);
223 } /* }}} int ctoj_double */
225 /* Convert a jlong to a java.lang.Number */
226 static jobject ctoj_jlong_to_number (JNIEnv *jvm_env, jlong value) /* {{{ */
227 {
228 jclass c_long;
229 jmethodID m_long_constructor;
231 /* Look up the java.lang.Long class */
232 c_long = (*jvm_env)->FindClass (jvm_env, "java/lang/Long");
233 if (c_long == NULL)
234 {
235 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
236 "java.lang.Long class failed.");
237 return (NULL);
238 }
240 m_long_constructor = (*jvm_env)->GetMethodID (jvm_env,
241 c_long, "<init>", "(J)V");
242 if (m_long_constructor == NULL)
243 {
244 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
245 "`Long (long)' constructor failed.");
246 return (NULL);
247 }
249 return ((*jvm_env)->NewObject (jvm_env,
250 c_long, m_long_constructor, value));
251 } /* }}} jobject ctoj_jlong_to_number */
253 /* Convert a jdouble to a java.lang.Number */
254 static jobject ctoj_jdouble_to_number (JNIEnv *jvm_env, jdouble value) /* {{{ */
255 {
256 jclass c_double;
257 jmethodID m_double_constructor;
259 /* Look up the java.lang.Long class */
260 c_double = (*jvm_env)->FindClass (jvm_env, "java/lang/Double");
261 if (c_double == NULL)
262 {
263 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
264 "java.lang.Double class failed.");
265 return (NULL);
266 }
268 m_double_constructor = (*jvm_env)->GetMethodID (jvm_env,
269 c_double, "<init>", "(D)V");
270 if (m_double_constructor == NULL)
271 {
272 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
273 "`Double (double)' constructor failed.");
274 return (NULL);
275 }
277 return ((*jvm_env)->NewObject (jvm_env,
278 c_double, m_double_constructor, value));
279 } /* }}} jobject ctoj_jdouble_to_number */
281 /* Convert a value_t to a java.lang.Number */
282 static jobject ctoj_value_to_number (JNIEnv *jvm_env, /* {{{ */
283 value_t value, int ds_type)
284 {
285 if (ds_type == DS_TYPE_COUNTER)
286 return (ctoj_jlong_to_number (jvm_env, (jlong) value.counter));
287 else if (ds_type == DS_TYPE_GAUGE)
288 return (ctoj_jdouble_to_number (jvm_env, (jdouble) value.gauge));
289 if (ds_type == DS_TYPE_DERIVE)
290 return (ctoj_jlong_to_number (jvm_env, (jlong) value.derive));
291 if (ds_type == DS_TYPE_ABSOLUTE)
292 return (ctoj_jlong_to_number (jvm_env, (jlong) value.absolute));
293 else
294 return (NULL);
295 } /* }}} jobject ctoj_value_to_number */
297 /* Convert a data_source_t to a org/collectd/api/DataSource */
298 static jobject ctoj_data_source (JNIEnv *jvm_env, /* {{{ */
299 const data_source_t *dsrc)
300 {
301 jclass c_datasource;
302 jmethodID m_datasource_constructor;
303 jobject o_datasource;
304 int status;
306 /* Look up the DataSource class */
307 c_datasource = (*jvm_env)->FindClass (jvm_env,
308 "org/collectd/api/DataSource");
309 if (c_datasource == NULL)
310 {
311 ERROR ("java plugin: ctoj_data_source: "
312 "FindClass (org/collectd/api/DataSource) failed.");
313 return (NULL);
314 }
316 /* Lookup the `ValueList ()' constructor. */
317 m_datasource_constructor = (*jvm_env)->GetMethodID (jvm_env, c_datasource,
318 "<init>", "()V");
319 if (m_datasource_constructor == NULL)
320 {
321 ERROR ("java plugin: ctoj_data_source: Cannot find the "
322 "`DataSource ()' constructor.");
323 return (NULL);
324 }
326 /* Create a new instance. */
327 o_datasource = (*jvm_env)->NewObject (jvm_env, c_datasource,
328 m_datasource_constructor);
329 if (o_datasource == NULL)
330 {
331 ERROR ("java plugin: ctoj_data_source: "
332 "Creating a new DataSource instance failed.");
333 return (NULL);
334 }
336 /* Set name via `void setName (String name)' */
337 status = ctoj_string (jvm_env, dsrc->name,
338 c_datasource, o_datasource, "setName");
339 if (status != 0)
340 {
341 ERROR ("java plugin: ctoj_data_source: "
342 "ctoj_string (setName) failed.");
343 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
344 return (NULL);
345 }
347 /* Set type via `void setType (int type)' */
348 status = ctoj_int (jvm_env, dsrc->type,
349 c_datasource, o_datasource, "setType");
350 if (status != 0)
351 {
352 ERROR ("java plugin: ctoj_data_source: "
353 "ctoj_int (setType) failed.");
354 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
355 return (NULL);
356 }
358 /* Set min via `void setMin (double min)' */
359 status = ctoj_double (jvm_env, dsrc->min,
360 c_datasource, o_datasource, "setMin");
361 if (status != 0)
362 {
363 ERROR ("java plugin: ctoj_data_source: "
364 "ctoj_double (setMin) failed.");
365 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
366 return (NULL);
367 }
369 /* Set max via `void setMax (double max)' */
370 status = ctoj_double (jvm_env, dsrc->max,
371 c_datasource, o_datasource, "setMax");
372 if (status != 0)
373 {
374 ERROR ("java plugin: ctoj_data_source: "
375 "ctoj_double (setMax) failed.");
376 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
377 return (NULL);
378 }
380 return (o_datasource);
381 } /* }}} jobject ctoj_data_source */
383 /* Convert a oconfig_value_t to a org/collectd/api/OConfigValue */
384 static jobject ctoj_oconfig_value (JNIEnv *jvm_env, /* {{{ */
385 oconfig_value_t ocvalue)
386 {
387 jclass c_ocvalue;
388 jmethodID m_ocvalue_constructor;
389 jobject o_argument;
390 jobject o_ocvalue;
392 m_ocvalue_constructor = NULL;
393 o_argument = NULL;
395 c_ocvalue = (*jvm_env)->FindClass (jvm_env,
396 "org/collectd/api/OConfigValue");
397 if (c_ocvalue == NULL)
398 {
399 ERROR ("java plugin: ctoj_oconfig_value: "
400 "FindClass (org/collectd/api/OConfigValue) failed.");
401 return (NULL);
402 }
404 if (ocvalue.type == OCONFIG_TYPE_BOOLEAN)
405 {
406 jboolean tmp_boolean;
408 tmp_boolean = (ocvalue.value.boolean == 0) ? JNI_FALSE : JNI_TRUE;
410 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
411 "<init>", "(Z)V");
412 if (m_ocvalue_constructor == NULL)
413 {
414 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
415 "`OConfigValue (boolean)' constructor.");
416 return (NULL);
417 }
419 return ((*jvm_env)->NewObject (jvm_env,
420 c_ocvalue, m_ocvalue_constructor, tmp_boolean));
421 } /* if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) */
422 else if (ocvalue.type == OCONFIG_TYPE_STRING)
423 {
424 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
425 "<init>", "(Ljava/lang/String;)V");
426 if (m_ocvalue_constructor == NULL)
427 {
428 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
429 "`OConfigValue (String)' constructor.");
430 return (NULL);
431 }
433 o_argument = (*jvm_env)->NewStringUTF (jvm_env, ocvalue.value.string);
434 if (o_argument == NULL)
435 {
436 ERROR ("java plugin: ctoj_oconfig_value: "
437 "Creating a String object failed.");
438 return (NULL);
439 }
440 }
441 else if (ocvalue.type == OCONFIG_TYPE_NUMBER)
442 {
443 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
444 "<init>", "(Ljava/lang/Number;)V");
445 if (m_ocvalue_constructor == NULL)
446 {
447 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
448 "`OConfigValue (Number)' constructor.");
449 return (NULL);
450 }
452 o_argument = ctoj_jdouble_to_number (jvm_env,
453 (jdouble) ocvalue.value.number);
454 if (o_argument == NULL)
455 {
456 ERROR ("java plugin: ctoj_oconfig_value: "
457 "Creating a Number object failed.");
458 return (NULL);
459 }
460 }
461 else
462 {
463 return (NULL);
464 }
466 assert (m_ocvalue_constructor != NULL);
467 assert (o_argument != NULL);
469 o_ocvalue = (*jvm_env)->NewObject (jvm_env,
470 c_ocvalue, m_ocvalue_constructor, o_argument);
471 if (o_ocvalue == NULL)
472 {
473 ERROR ("java plugin: ctoj_oconfig_value: "
474 "Creating an OConfigValue object failed.");
475 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
476 return (NULL);
477 }
479 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
480 return (o_ocvalue);
481 } /* }}} jobject ctoj_oconfig_value */
483 /* Convert a oconfig_item_t to a org/collectd/api/OConfigItem */
484 static jobject ctoj_oconfig_item (JNIEnv *jvm_env, /* {{{ */
485 const oconfig_item_t *ci)
486 {
487 jclass c_ocitem;
488 jmethodID m_ocitem_constructor;
489 jmethodID m_addvalue;
490 jmethodID m_addchild;
491 jobject o_key;
492 jobject o_ocitem;
493 int i;
495 c_ocitem = (*jvm_env)->FindClass (jvm_env, "org/collectd/api/OConfigItem");
496 if (c_ocitem == NULL)
497 {
498 ERROR ("java plugin: ctoj_oconfig_item: "
499 "FindClass (org/collectd/api/OConfigItem) failed.");
500 return (NULL);
501 }
503 /* Get the required methods: m_ocitem_constructor, m_addvalue, and m_addchild
504 * {{{ */
505 m_ocitem_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
506 "<init>", "(Ljava/lang/String;)V");
507 if (m_ocitem_constructor == NULL)
508 {
509 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
510 "`OConfigItem (String)' constructor.");
511 return (NULL);
512 }
514 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
515 "addValue", "(Lorg/collectd/api/OConfigValue;)V");
516 if (m_addvalue == NULL)
517 {
518 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
519 "`addValue (OConfigValue)' method.");
520 return (NULL);
521 }
523 m_addchild = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
524 "addChild", "(Lorg/collectd/api/OConfigItem;)V");
525 if (m_addchild == NULL)
526 {
527 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
528 "`addChild (OConfigItem)' method.");
529 return (NULL);
530 }
531 /* }}} */
533 /* Create a String object with the key.
534 * Needed for calling the constructor. */
535 o_key = (*jvm_env)->NewStringUTF (jvm_env, ci->key);
536 if (o_key == NULL)
537 {
538 ERROR ("java plugin: ctoj_oconfig_item: "
539 "Creating String object failed.");
540 return (NULL);
541 }
543 /* Create an OConfigItem object */
544 o_ocitem = (*jvm_env)->NewObject (jvm_env,
545 c_ocitem, m_ocitem_constructor, o_key);
546 if (o_ocitem == NULL)
547 {
548 ERROR ("java plugin: ctoj_oconfig_item: "
549 "Creating an OConfigItem object failed.");
550 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
551 return (NULL);
552 }
554 /* We don't need the String object any longer.. */
555 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
557 /* Call OConfigItem.addValue for each value */
558 for (i = 0; i < ci->values_num; i++) /* {{{ */
559 {
560 jobject o_value;
562 o_value = ctoj_oconfig_value (jvm_env, ci->values[i]);
563 if (o_value == NULL)
564 {
565 ERROR ("java plugin: ctoj_oconfig_item: "
566 "Creating an OConfigValue object failed.");
567 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
568 return (NULL);
569 }
571 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_value);
572 (*jvm_env)->DeleteLocalRef (jvm_env, o_value);
573 } /* }}} for (i = 0; i < ci->values_num; i++) */
575 /* Call OConfigItem.addChild for each child */
576 for (i = 0; i < ci->children_num; i++) /* {{{ */
577 {
578 jobject o_child;
580 o_child = ctoj_oconfig_item (jvm_env, ci->children + i);
581 if (o_child == NULL)
582 {
583 ERROR ("java plugin: ctoj_oconfig_item: "
584 "Creating an OConfigItem object failed.");
585 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
586 return (NULL);
587 }
589 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addchild, o_child);
590 (*jvm_env)->DeleteLocalRef (jvm_env, o_child);
591 } /* }}} for (i = 0; i < ci->children_num; i++) */
593 return (o_ocitem);
594 } /* }}} jobject ctoj_oconfig_item */
596 /* Convert a data_set_t to a org/collectd/api/DataSet */
597 static jobject ctoj_data_set (JNIEnv *jvm_env, const data_set_t *ds) /* {{{ */
598 {
599 jclass c_dataset;
600 jmethodID m_constructor;
601 jmethodID m_add;
602 jobject o_type;
603 jobject o_dataset;
604 int i;
606 /* Look up the org/collectd/api/DataSet class */
607 c_dataset = (*jvm_env)->FindClass (jvm_env, "org/collectd/api/DataSet");
608 if (c_dataset == NULL)
609 {
610 ERROR ("java plugin: ctoj_data_set: Looking up the "
611 "org/collectd/api/DataSet class failed.");
612 return (NULL);
613 }
615 /* Search for the `DataSet (String type)' constructor. */
616 m_constructor = (*jvm_env)->GetMethodID (jvm_env,
617 c_dataset, "<init>", "(Ljava/lang/String;)V");
618 if (m_constructor == NULL)
619 {
620 ERROR ("java plugin: ctoj_data_set: Looking up the "
621 "`DataSet (String)' constructor failed.");
622 return (NULL);
623 }
625 /* Search for the `void addDataSource (DataSource)' method. */
626 m_add = (*jvm_env)->GetMethodID (jvm_env,
627 c_dataset, "addDataSource", "(Lorg/collectd/api/DataSource;)V");
628 if (m_add == NULL)
629 {
630 ERROR ("java plugin: ctoj_data_set: Looking up the "
631 "`addDataSource (DataSource)' method failed.");
632 return (NULL);
633 }
635 o_type = (*jvm_env)->NewStringUTF (jvm_env, ds->type);
636 if (o_type == NULL)
637 {
638 ERROR ("java plugin: ctoj_data_set: Creating a String object failed.");
639 return (NULL);
640 }
642 o_dataset = (*jvm_env)->NewObject (jvm_env,
643 c_dataset, m_constructor, o_type);
644 if (o_dataset == NULL)
645 {
646 ERROR ("java plugin: ctoj_data_set: Creating a DataSet object failed.");
647 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
648 return (NULL);
649 }
651 /* Decrease reference counter on the java.lang.String object. */
652 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
654 for (i = 0; i < ds->ds_num; i++)
655 {
656 jobject o_datasource;
658 o_datasource = ctoj_data_source (jvm_env, ds->ds + i);
659 if (o_datasource == NULL)
660 {
661 ERROR ("java plugin: ctoj_data_set: ctoj_data_source (%s.%s) failed",
662 ds->type, ds->ds[i].name);
663 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
664 return (NULL);
665 }
667 (*jvm_env)->CallVoidMethod (jvm_env, o_dataset, m_add, o_datasource);
669 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
670 } /* for (i = 0; i < ds->ds_num; i++) */
672 return (o_dataset);
673 } /* }}} jobject ctoj_data_set */
675 static int ctoj_value_list_add_value (JNIEnv *jvm_env, /* {{{ */
676 value_t value, int ds_type,
677 jclass class_ptr, jobject object_ptr)
678 {
679 jmethodID m_addvalue;
680 jobject o_number;
682 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
683 "addValue", "(Ljava/lang/Number;)V");
684 if (m_addvalue == NULL)
685 {
686 ERROR ("java plugin: ctoj_value_list_add_value: "
687 "Cannot find method `void addValue (Number)'.");
688 return (-1);
689 }
691 o_number = ctoj_value_to_number (jvm_env, value, ds_type);
692 if (o_number == NULL)
693 {
694 ERROR ("java plugin: ctoj_value_list_add_value: "
695 "ctoj_value_to_number failed.");
696 return (-1);
697 }
699 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_addvalue, o_number);
701 (*jvm_env)->DeleteLocalRef (jvm_env, o_number);
703 return (0);
704 } /* }}} int ctoj_value_list_add_value */
706 static int ctoj_value_list_add_data_set (JNIEnv *jvm_env, /* {{{ */
707 jclass c_valuelist, jobject o_valuelist, const data_set_t *ds)
708 {
709 jmethodID m_setdataset;
710 jobject o_dataset;
712 /* Look for the `void setDataSource (List<DataSource> ds)' method. */
713 m_setdataset = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
714 "setDataSet", "(Lorg/collectd/api/DataSet;)V");
715 if (m_setdataset == NULL)
716 {
717 ERROR ("java plugin: ctoj_value_list_add_data_set: "
718 "Cannot find the `void setDataSet (DataSet)' method.");
719 return (-1);
720 }
722 /* Create a DataSet object. */
723 o_dataset = ctoj_data_set (jvm_env, ds);
724 if (o_dataset == NULL)
725 {
726 ERROR ("java plugin: ctoj_value_list_add_data_set: "
727 "ctoj_data_set (%s) failed.", ds->type);
728 return (-1);
729 }
731 /* Actually call the method. */
732 (*jvm_env)->CallVoidMethod (jvm_env,
733 o_valuelist, m_setdataset, o_dataset);
735 /* Decrease reference counter on the List<DataSource> object. */
736 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
738 return (0);
739 } /* }}} int ctoj_value_list_add_data_set */
741 /* Convert a value_list_t (and data_set_t) to a org/collectd/api/ValueList */
742 static jobject ctoj_value_list (JNIEnv *jvm_env, /* {{{ */
743 const data_set_t *ds, const value_list_t *vl)
744 {
745 jclass c_valuelist;
746 jmethodID m_valuelist_constructor;
747 jobject o_valuelist;
748 int status;
749 int i;
751 /* First, create a new ValueList instance..
752 * Look up the class.. */
753 c_valuelist = (*jvm_env)->FindClass (jvm_env,
754 "org/collectd/api/ValueList");
755 if (c_valuelist == NULL)
756 {
757 ERROR ("java plugin: ctoj_value_list: "
758 "FindClass (org/collectd/api/ValueList) failed.");
759 return (NULL);
760 }
762 /* Lookup the `ValueList ()' constructor. */
763 m_valuelist_constructor = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
764 "<init>", "()V");
765 if (m_valuelist_constructor == NULL)
766 {
767 ERROR ("java plugin: ctoj_value_list: Cannot find the "
768 "`ValueList ()' constructor.");
769 return (NULL);
770 }
772 /* Create a new instance. */
773 o_valuelist = (*jvm_env)->NewObject (jvm_env, c_valuelist,
774 m_valuelist_constructor);
775 if (o_valuelist == NULL)
776 {
777 ERROR ("java plugin: ctoj_value_list: Creating a new ValueList instance "
778 "failed.");
779 return (NULL);
780 }
782 status = ctoj_value_list_add_data_set (jvm_env,
783 c_valuelist, o_valuelist, ds);
784 if (status != 0)
785 {
786 ERROR ("java plugin: ctoj_value_list: "
787 "ctoj_value_list_add_data_set failed.");
788 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
789 return (NULL);
790 }
792 /* Set the strings.. */
793 #define SET_STRING(str,method_name) do { \
794 status = ctoj_string (jvm_env, str, \
795 c_valuelist, o_valuelist, method_name); \
796 if (status != 0) { \
797 ERROR ("java plugin: ctoj_value_list: ctoj_string (%s) failed.", \
798 method_name); \
799 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist); \
800 return (NULL); \
801 } } while (0)
803 SET_STRING (vl->host, "setHost");
804 SET_STRING (vl->plugin, "setPlugin");
805 SET_STRING (vl->plugin_instance, "setPluginInstance");
806 SET_STRING (vl->type, "setType");
807 SET_STRING (vl->type_instance, "setTypeInstance");
809 #undef SET_STRING
811 /* Set the `time' member. Java stores time in milliseconds. */
812 status = ctoj_long (jvm_env, (jlong) CDTIME_T_TO_MS (vl->time),
813 c_valuelist, o_valuelist, "setTime");
814 if (status != 0)
815 {
816 ERROR ("java plugin: ctoj_value_list: ctoj_long (setTime) failed.");
817 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
818 return (NULL);
819 }
821 /* Set the `interval' member.. */
822 status = ctoj_long (jvm_env,
823 (jlong) CDTIME_T_TO_MS (vl->interval),
824 c_valuelist, o_valuelist, "setInterval");
825 if (status != 0)
826 {
827 ERROR ("java plugin: ctoj_value_list: ctoj_long (setInterval) failed.");
828 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
829 return (NULL);
830 }
832 for (i = 0; i < vl->values_len; i++)
833 {
834 status = ctoj_value_list_add_value (jvm_env, vl->values[i], ds->ds[i].type,
835 c_valuelist, o_valuelist);
836 if (status != 0)
837 {
838 ERROR ("java plugin: ctoj_value_list: "
839 "ctoj_value_list_add_value failed.");
840 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
841 return (NULL);
842 }
843 }
845 return (o_valuelist);
846 } /* }}} jobject ctoj_value_list */
848 /* Convert a notification_t to a org/collectd/api/Notification */
849 static jobject ctoj_notification (JNIEnv *jvm_env, /* {{{ */
850 const notification_t *n)
851 {
852 jclass c_notification;
853 jmethodID m_constructor;
854 jobject o_notification;
855 int status;
857 /* First, create a new Notification instance..
858 * Look up the class.. */
859 c_notification = (*jvm_env)->FindClass (jvm_env,
860 "org/collectd/api/Notification");
861 if (c_notification == NULL)
862 {
863 ERROR ("java plugin: ctoj_notification: "
864 "FindClass (org/collectd/api/Notification) failed.");
865 return (NULL);
866 }
868 /* Lookup the `Notification ()' constructor. */
869 m_constructor = (*jvm_env)->GetMethodID (jvm_env, c_notification,
870 "<init>", "()V");
871 if (m_constructor == NULL)
872 {
873 ERROR ("java plugin: ctoj_notification: Cannot find the "
874 "`Notification ()' constructor.");
875 return (NULL);
876 }
878 /* Create a new instance. */
879 o_notification = (*jvm_env)->NewObject (jvm_env, c_notification,
880 m_constructor);
881 if (o_notification == NULL)
882 {
883 ERROR ("java plugin: ctoj_notification: Creating a new Notification "
884 "instance failed.");
885 return (NULL);
886 }
888 /* Set the strings.. */
889 #define SET_STRING(str,method_name) do { \
890 status = ctoj_string (jvm_env, str, \
891 c_notification, o_notification, method_name); \
892 if (status != 0) { \
893 ERROR ("java plugin: ctoj_notification: ctoj_string (%s) failed.", \
894 method_name); \
895 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification); \
896 return (NULL); \
897 } } while (0)
899 SET_STRING (n->host, "setHost");
900 SET_STRING (n->plugin, "setPlugin");
901 SET_STRING (n->plugin_instance, "setPluginInstance");
902 SET_STRING (n->type, "setType");
903 SET_STRING (n->type_instance, "setTypeInstance");
904 SET_STRING (n->message, "setMessage");
906 #undef SET_STRING
908 /* Set the `time' member. Java stores time in milliseconds. */
909 status = ctoj_long (jvm_env, (jlong) CDTIME_T_TO_MS (n->time),
910 c_notification, o_notification, "setTime");
911 if (status != 0)
912 {
913 ERROR ("java plugin: ctoj_notification: ctoj_long (setTime) failed.");
914 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
915 return (NULL);
916 }
918 /* Set the `severity' member.. */
919 status = ctoj_int (jvm_env, (jint) n->severity,
920 c_notification, o_notification, "setSeverity");
921 if (status != 0)
922 {
923 ERROR ("java plugin: ctoj_notification: ctoj_int (setSeverity) failed.");
924 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
925 return (NULL);
926 }
928 return (o_notification);
929 } /* }}} jobject ctoj_notification */
931 /*
932 * Java to C conversion functions
933 */
934 /* Call a `String <method> ()' method. */
935 static int jtoc_string (JNIEnv *jvm_env, /* {{{ */
936 char *buffer, size_t buffer_size, int empty_okay,
937 jclass class_ptr, jobject object_ptr, const char *method_name)
938 {
939 jmethodID method_id;
940 jobject string_obj;
941 const char *c_str;
943 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
944 method_name, "()Ljava/lang/String;");
945 if (method_id == NULL)
946 {
947 ERROR ("java plugin: jtoc_string: Cannot find method `String %s ()'.",
948 method_name);
949 return (-1);
950 }
952 string_obj = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, method_id);
953 if ((string_obj == NULL) && (empty_okay == 0))
954 {
955 ERROR ("java plugin: jtoc_string: CallObjectMethod (%s) failed.",
956 method_name);
957 return (-1);
958 }
959 else if ((string_obj == NULL) && (empty_okay != 0))
960 {
961 memset (buffer, 0, buffer_size);
962 return (0);
963 }
965 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, string_obj, 0);
966 if (c_str == NULL)
967 {
968 ERROR ("java plugin: jtoc_string: GetStringUTFChars failed.");
969 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
970 return (-1);
971 }
973 sstrncpy (buffer, c_str, buffer_size);
975 (*jvm_env)->ReleaseStringUTFChars (jvm_env, string_obj, c_str);
976 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
978 return (0);
979 } /* }}} int jtoc_string */
981 /* Call an `int <method> ()' method. */
982 static int jtoc_int (JNIEnv *jvm_env, /* {{{ */
983 jint *ret_value,
984 jclass class_ptr, jobject object_ptr, const char *method_name)
985 {
986 jmethodID method_id;
988 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
989 method_name, "()I");
990 if (method_id == NULL)
991 {
992 ERROR ("java plugin: jtoc_int: Cannot find method `int %s ()'.",
993 method_name);
994 return (-1);
995 }
997 *ret_value = (*jvm_env)->CallIntMethod (jvm_env, object_ptr, method_id);
999 return (0);
1000 } /* }}} int jtoc_int */
1002 /* Call a `long <method> ()' method. */
1003 static int jtoc_long (JNIEnv *jvm_env, /* {{{ */
1004 jlong *ret_value,
1005 jclass class_ptr, jobject object_ptr, const char *method_name)
1006 {
1007 jmethodID method_id;
1009 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1010 method_name, "()J");
1011 if (method_id == NULL)
1012 {
1013 ERROR ("java plugin: jtoc_long: Cannot find method `long %s ()'.",
1014 method_name);
1015 return (-1);
1016 }
1018 *ret_value = (*jvm_env)->CallLongMethod (jvm_env, object_ptr, method_id);
1020 return (0);
1021 } /* }}} int jtoc_long */
1023 /* Call a `double <method> ()' method. */
1024 static int jtoc_double (JNIEnv *jvm_env, /* {{{ */
1025 jdouble *ret_value,
1026 jclass class_ptr, jobject object_ptr, const char *method_name)
1027 {
1028 jmethodID method_id;
1030 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1031 method_name, "()D");
1032 if (method_id == NULL)
1033 {
1034 ERROR ("java plugin: jtoc_double: Cannot find method `double %s ()'.",
1035 method_name);
1036 return (-1);
1037 }
1039 *ret_value = (*jvm_env)->CallDoubleMethod (jvm_env, object_ptr, method_id);
1041 return (0);
1042 } /* }}} int jtoc_double */
1044 static int jtoc_value (JNIEnv *jvm_env, /* {{{ */
1045 value_t *ret_value, int ds_type, jobject object_ptr)
1046 {
1047 jclass class_ptr;
1048 int status;
1050 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1052 if (ds_type == DS_TYPE_GAUGE)
1053 {
1054 jdouble tmp_double;
1056 status = jtoc_double (jvm_env, &tmp_double,
1057 class_ptr, object_ptr, "doubleValue");
1058 if (status != 0)
1059 {
1060 ERROR ("java plugin: jtoc_value: "
1061 "jtoc_double failed.");
1062 return (-1);
1063 }
1064 (*ret_value).gauge = (gauge_t) tmp_double;
1065 }
1066 else
1067 {
1068 jlong tmp_long;
1070 status = jtoc_long (jvm_env, &tmp_long,
1071 class_ptr, object_ptr, "longValue");
1072 if (status != 0)
1073 {
1074 ERROR ("java plugin: jtoc_value: "
1075 "jtoc_long failed.");
1076 return (-1);
1077 }
1079 if (ds_type == DS_TYPE_DERIVE)
1080 (*ret_value).derive = (derive_t) tmp_long;
1081 else if (ds_type == DS_TYPE_ABSOLUTE)
1082 (*ret_value).absolute = (absolute_t) tmp_long;
1083 else
1084 (*ret_value).counter = (counter_t) tmp_long;
1085 }
1087 return (0);
1088 } /* }}} int jtoc_value */
1090 /* Read a List<Number>, convert it to `value_t' and add it to the given
1091 * `value_list_t'. */
1092 static int jtoc_values_array (JNIEnv *jvm_env, /* {{{ */
1093 const data_set_t *ds, value_list_t *vl,
1094 jclass class_ptr, jobject object_ptr)
1095 {
1096 jmethodID m_getvalues;
1097 jmethodID m_toarray;
1098 jobject o_list;
1099 jobjectArray o_number_array;
1101 value_t *values;
1102 int values_num;
1103 int i;
1105 values_num = ds->ds_num;
1107 values = NULL;
1108 o_number_array = NULL;
1109 o_list = NULL;
1111 #define BAIL_OUT(status) \
1112 free (values); \
1113 if (o_number_array != NULL) \
1114 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array); \
1115 if (o_list != NULL) \
1116 (*jvm_env)->DeleteLocalRef (jvm_env, o_list); \
1117 return (status);
1119 /* Call: List<Number> ValueList.getValues () */
1120 m_getvalues = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1121 "getValues", "()Ljava/util/List;");
1122 if (m_getvalues == NULL)
1123 {
1124 ERROR ("java plugin: jtoc_values_array: "
1125 "Cannot find method `List getValues ()'.");
1126 BAIL_OUT (-1);
1127 }
1129 o_list = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, m_getvalues);
1130 if (o_list == NULL)
1131 {
1132 ERROR ("java plugin: jtoc_values_array: "
1133 "CallObjectMethod (getValues) failed.");
1134 BAIL_OUT (-1);
1135 }
1137 /* Call: Number[] List.toArray () */
1138 m_toarray = (*jvm_env)->GetMethodID (jvm_env,
1139 (*jvm_env)->GetObjectClass (jvm_env, o_list),
1140 "toArray", "()[Ljava/lang/Object;");
1141 if (m_toarray == NULL)
1142 {
1143 ERROR ("java plugin: jtoc_values_array: "
1144 "Cannot find method `Object[] toArray ()'.");
1145 BAIL_OUT (-1);
1146 }
1148 o_number_array = (*jvm_env)->CallObjectMethod (jvm_env, o_list, m_toarray);
1149 if (o_number_array == NULL)
1150 {
1151 ERROR ("java plugin: jtoc_values_array: "
1152 "CallObjectMethod (toArray) failed.");
1153 BAIL_OUT (-1);
1154 }
1156 values = (value_t *) calloc (values_num, sizeof (value_t));
1157 if (values == NULL)
1158 {
1159 ERROR ("java plugin: jtoc_values_array: calloc failed.");
1160 BAIL_OUT (-1);
1161 }
1163 for (i = 0; i < values_num; i++)
1164 {
1165 jobject o_number;
1166 int status;
1168 o_number = (*jvm_env)->GetObjectArrayElement (jvm_env,
1169 o_number_array, (jsize) i);
1170 if (o_number == NULL)
1171 {
1172 ERROR ("java plugin: jtoc_values_array: "
1173 "GetObjectArrayElement (%i) failed.", i);
1174 BAIL_OUT (-1);
1175 }
1177 status = jtoc_value (jvm_env, values + i, ds->ds[i].type, o_number);
1178 if (status != 0)
1179 {
1180 ERROR ("java plugin: jtoc_values_array: "
1181 "jtoc_value (%i) failed.", i);
1182 BAIL_OUT (-1);
1183 }
1184 } /* for (i = 0; i < values_num; i++) */
1186 vl->values = values;
1187 vl->values_len = values_num;
1189 #undef BAIL_OUT
1190 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array);
1191 (*jvm_env)->DeleteLocalRef (jvm_env, o_list);
1192 return (0);
1193 } /* }}} int jtoc_values_array */
1195 /* Convert a org/collectd/api/ValueList to a value_list_t. */
1196 static int jtoc_value_list (JNIEnv *jvm_env, value_list_t *vl, /* {{{ */
1197 jobject object_ptr)
1198 {
1199 jclass class_ptr;
1200 int status;
1201 jlong tmp_long;
1202 const data_set_t *ds;
1204 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1205 if (class_ptr == NULL)
1206 {
1207 ERROR ("java plugin: jtoc_value_list: GetObjectClass failed.");
1208 return (-1);
1209 }
1211 /* eo == empty okay */
1212 #define SET_STRING(buffer,method, eo) do { \
1213 status = jtoc_string (jvm_env, buffer, sizeof (buffer), eo, \
1214 class_ptr, object_ptr, method); \
1215 if (status != 0) { \
1216 ERROR ("java plugin: jtoc_value_list: jtoc_string (%s) failed.", \
1217 method); \
1218 return (-1); \
1219 } } while (0)
1221 SET_STRING(vl->type, "getType", /* empty = */ 0);
1223 ds = plugin_get_ds (vl->type);
1224 if (ds == NULL)
1225 {
1226 ERROR ("java plugin: jtoc_value_list: Data-set `%s' is not defined. "
1227 "Please consult the types.db(5) manpage for mor information.",
1228 vl->type);
1229 return (-1);
1230 }
1232 SET_STRING(vl->host, "getHost", /* empty = */ 0);
1233 SET_STRING(vl->plugin, "getPlugin", /* empty = */ 0);
1234 SET_STRING(vl->plugin_instance, "getPluginInstance", /* empty = */ 1);
1235 SET_STRING(vl->type_instance, "getTypeInstance", /* empty = */ 1);
1237 #undef SET_STRING
1239 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1240 if (status != 0)
1241 {
1242 ERROR ("java plugin: jtoc_value_list: jtoc_long (getTime) failed.");
1243 return (-1);
1244 }
1245 /* Java measures time in milliseconds. */
1246 vl->time = MS_TO_CDTIME_T (tmp_long);
1248 status = jtoc_long (jvm_env, &tmp_long,
1249 class_ptr, object_ptr, "getInterval");
1250 if (status != 0)
1251 {
1252 ERROR ("java plugin: jtoc_value_list: jtoc_long (getInterval) failed.");
1253 return (-1);
1254 }
1255 vl->interval = MS_TO_CDTIME_T (tmp_long);
1257 status = jtoc_values_array (jvm_env, ds, vl, class_ptr, object_ptr);
1258 if (status != 0)
1259 {
1260 ERROR ("java plugin: jtoc_value_list: jtoc_values_array failed.");
1261 return (-1);
1262 }
1264 return (0);
1265 } /* }}} int jtoc_value_list */
1267 /* Convert a org/collectd/api/Notification to a notification_t. */
1268 static int jtoc_notification (JNIEnv *jvm_env, notification_t *n, /* {{{ */
1269 jobject object_ptr)
1270 {
1271 jclass class_ptr;
1272 int status;
1273 jlong tmp_long;
1274 jint tmp_int;
1276 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1277 if (class_ptr == NULL)
1278 {
1279 ERROR ("java plugin: jtoc_notification: GetObjectClass failed.");
1280 return (-1);
1281 }
1283 /* eo == empty okay */
1284 #define SET_STRING(buffer,method, eo) do { \
1285 status = jtoc_string (jvm_env, buffer, sizeof (buffer), eo, \
1286 class_ptr, object_ptr, method); \
1287 if (status != 0) { \
1288 ERROR ("java plugin: jtoc_notification: jtoc_string (%s) failed.", \
1289 method); \
1290 return (-1); \
1291 } } while (0)
1293 SET_STRING (n->host, "getHost", /* empty = */ 1);
1294 SET_STRING (n->plugin, "getPlugin", /* empty = */ 1);
1295 SET_STRING (n->plugin_instance, "getPluginInstance", /* empty = */ 1);
1296 SET_STRING (n->type, "getType", /* empty = */ 1);
1297 SET_STRING (n->type_instance, "getTypeInstance", /* empty = */ 1);
1298 SET_STRING (n->message, "getMessage", /* empty = */ 0);
1300 #undef SET_STRING
1302 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1303 if (status != 0)
1304 {
1305 ERROR ("java plugin: jtoc_notification: jtoc_long (getTime) failed.");
1306 return (-1);
1307 }
1308 /* Java measures time in milliseconds. */
1309 n->time = MS_TO_CDTIME_T(tmp_long);
1311 status = jtoc_int (jvm_env, &tmp_int,
1312 class_ptr, object_ptr, "getSeverity");
1313 if (status != 0)
1314 {
1315 ERROR ("java plugin: jtoc_notification: jtoc_int (getSeverity) failed.");
1316 return (-1);
1317 }
1318 n->severity = (int) tmp_int;
1320 return (0);
1321 } /* }}} int jtoc_notification */
1322 /*
1323 * Functions accessible from Java
1324 */
1325 static jint JNICALL cjni_api_dispatch_values (JNIEnv *jvm_env, /* {{{ */
1326 jobject this, jobject java_vl)
1327 {
1328 value_list_t vl = VALUE_LIST_INIT;
1329 int status;
1331 DEBUG ("cjni_api_dispatch_values: java_vl = %p;", (void *) java_vl);
1333 status = jtoc_value_list (jvm_env, &vl, java_vl);
1334 if (status != 0)
1335 {
1336 ERROR ("java plugin: cjni_api_dispatch_values: jtoc_value_list failed.");
1337 return (-1);
1338 }
1340 status = plugin_dispatch_values (&vl);
1342 sfree (vl.values);
1344 return (status);
1345 } /* }}} jint cjni_api_dispatch_values */
1347 static jint JNICALL cjni_api_dispatch_notification (JNIEnv *jvm_env, /* {{{ */
1348 jobject this, jobject o_notification)
1349 {
1350 notification_t n;
1351 int status;
1353 memset (&n, 0, sizeof (n));
1354 n.meta = NULL;
1356 status = jtoc_notification (jvm_env, &n, o_notification);
1357 if (status != 0)
1358 {
1359 ERROR ("java plugin: cjni_api_dispatch_notification: jtoc_notification failed.");
1360 return (-1);
1361 }
1363 status = plugin_dispatch_notification (&n);
1365 return (status);
1366 } /* }}} jint cjni_api_dispatch_notification */
1368 static jobject JNICALL cjni_api_get_ds (JNIEnv *jvm_env, /* {{{ */
1369 jobject this, jobject o_string_type)
1370 {
1371 const char *ds_name;
1372 const data_set_t *ds;
1373 jobject o_dataset;
1375 ds_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_string_type, 0);
1376 if (ds_name == NULL)
1377 {
1378 ERROR ("java plugin: cjni_api_get_ds: GetStringUTFChars failed.");
1379 return (NULL);
1380 }
1382 ds = plugin_get_ds (ds_name);
1383 DEBUG ("java plugin: cjni_api_get_ds: "
1384 "plugin_get_ds (%s) = %p;", ds_name, (void *) ds);
1386 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_string_type, ds_name);
1388 if (ds == NULL)
1389 return (NULL);
1391 o_dataset = ctoj_data_set (jvm_env, ds);
1392 return (o_dataset);
1393 } /* }}} jint cjni_api_get_ds */
1395 static jint JNICALL cjni_api_register_config (JNIEnv *jvm_env, /* {{{ */
1396 jobject this, jobject o_name, jobject o_config)
1397 {
1398 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_CONFIG));
1399 } /* }}} jint cjni_api_register_config */
1401 static jint JNICALL cjni_api_register_init (JNIEnv *jvm_env, /* {{{ */
1402 jobject this, jobject o_name, jobject o_config)
1403 {
1404 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_INIT));
1405 } /* }}} jint cjni_api_register_init */
1407 static jint JNICALL cjni_api_register_read (JNIEnv *jvm_env, /* {{{ */
1408 jobject this, jobject o_name, jobject o_read)
1409 {
1410 user_data_t ud;
1411 cjni_callback_info_t *cbi;
1413 cbi = cjni_callback_info_create (jvm_env, o_name, o_read, CB_TYPE_READ);
1414 if (cbi == NULL)
1415 return (-1);
1417 DEBUG ("java plugin: Registering new read callback: %s", cbi->name);
1419 memset (&ud, 0, sizeof (ud));
1420 ud.data = (void *) cbi;
1421 ud.free_func = cjni_callback_info_destroy;
1423 plugin_register_complex_read (/* group = */ NULL, cbi->name, cjni_read,
1424 /* interval = */ NULL, &ud);
1426 (*jvm_env)->DeleteLocalRef (jvm_env, o_read);
1428 return (0);
1429 } /* }}} jint cjni_api_register_read */
1431 static jint JNICALL cjni_api_register_write (JNIEnv *jvm_env, /* {{{ */
1432 jobject this, jobject o_name, jobject o_write)
1433 {
1434 user_data_t ud;
1435 cjni_callback_info_t *cbi;
1437 cbi = cjni_callback_info_create (jvm_env, o_name, o_write, CB_TYPE_WRITE);
1438 if (cbi == NULL)
1439 return (-1);
1441 DEBUG ("java plugin: Registering new write callback: %s", cbi->name);
1443 memset (&ud, 0, sizeof (ud));
1444 ud.data = (void *) cbi;
1445 ud.free_func = cjni_callback_info_destroy;
1447 plugin_register_write (cbi->name, cjni_write, &ud);
1449 (*jvm_env)->DeleteLocalRef (jvm_env, o_write);
1451 return (0);
1452 } /* }}} jint cjni_api_register_write */
1454 static jint JNICALL cjni_api_register_flush (JNIEnv *jvm_env, /* {{{ */
1455 jobject this, jobject o_name, jobject o_flush)
1456 {
1457 user_data_t ud;
1458 cjni_callback_info_t *cbi;
1460 cbi = cjni_callback_info_create (jvm_env, o_name, o_flush, CB_TYPE_FLUSH);
1461 if (cbi == NULL)
1462 return (-1);
1464 DEBUG ("java plugin: Registering new flush callback: %s", cbi->name);
1466 memset (&ud, 0, sizeof (ud));
1467 ud.data = (void *) cbi;
1468 ud.free_func = cjni_callback_info_destroy;
1470 plugin_register_flush (cbi->name, cjni_flush, &ud);
1472 (*jvm_env)->DeleteLocalRef (jvm_env, o_flush);
1474 return (0);
1475 } /* }}} jint cjni_api_register_flush */
1477 static jint JNICALL cjni_api_register_shutdown (JNIEnv *jvm_env, /* {{{ */
1478 jobject this, jobject o_name, jobject o_shutdown)
1479 {
1480 return (cjni_callback_register (jvm_env, o_name, o_shutdown,
1481 CB_TYPE_SHUTDOWN));
1482 } /* }}} jint cjni_api_register_shutdown */
1484 static jint JNICALL cjni_api_register_log (JNIEnv *jvm_env, /* {{{ */
1485 jobject this, jobject o_name, jobject o_log)
1486 {
1487 user_data_t ud;
1488 cjni_callback_info_t *cbi;
1490 cbi = cjni_callback_info_create (jvm_env, o_name, o_log, CB_TYPE_LOG);
1491 if (cbi == NULL)
1492 return (-1);
1494 DEBUG ("java plugin: Registering new log callback: %s", cbi->name);
1496 memset (&ud, 0, sizeof (ud));
1497 ud.data = (void *) cbi;
1498 ud.free_func = cjni_callback_info_destroy;
1500 plugin_register_log (cbi->name, cjni_log, &ud);
1502 (*jvm_env)->DeleteLocalRef (jvm_env, o_log);
1504 return (0);
1505 } /* }}} jint cjni_api_register_log */
1507 static jint JNICALL cjni_api_register_notification (JNIEnv *jvm_env, /* {{{ */
1508 jobject this, jobject o_name, jobject o_notification)
1509 {
1510 user_data_t ud;
1511 cjni_callback_info_t *cbi;
1513 cbi = cjni_callback_info_create (jvm_env, o_name, o_notification,
1514 CB_TYPE_NOTIFICATION);
1515 if (cbi == NULL)
1516 return (-1);
1518 DEBUG ("java plugin: Registering new notification callback: %s", cbi->name);
1520 memset (&ud, 0, sizeof (ud));
1521 ud.data = (void *) cbi;
1522 ud.free_func = cjni_callback_info_destroy;
1524 plugin_register_notification (cbi->name, cjni_notification, &ud);
1526 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
1528 return (0);
1529 } /* }}} jint cjni_api_register_notification */
1531 static jint JNICALL cjni_api_register_match_target (JNIEnv *jvm_env, /* {{{ */
1532 jobject this, jobject o_name, jobject o_match, int type)
1533 {
1534 int status;
1535 const char *c_name;
1537 c_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_name, 0);
1538 if (c_name == NULL)
1539 {
1540 ERROR ("java plugin: cjni_api_register_match_target: "
1541 "GetStringUTFChars failed.");
1542 return (-1);
1543 }
1545 status = cjni_callback_register (jvm_env, o_name, o_match, type);
1546 if (status != 0)
1547 {
1548 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1549 return (-1);
1550 }
1552 if (type == CB_TYPE_MATCH)
1553 {
1554 match_proc_t m_proc;
1556 memset (&m_proc, 0, sizeof (m_proc));
1557 m_proc.create = cjni_match_target_create;
1558 m_proc.destroy = cjni_match_target_destroy;
1559 m_proc.match = (void *) cjni_match_target_invoke;
1561 status = fc_register_match (c_name, m_proc);
1562 }
1563 else if (type == CB_TYPE_TARGET)
1564 {
1565 target_proc_t t_proc;
1567 memset (&t_proc, 0, sizeof (t_proc));
1568 t_proc.create = cjni_match_target_create;
1569 t_proc.destroy = cjni_match_target_destroy;
1570 t_proc.invoke = cjni_match_target_invoke;
1572 status = fc_register_target (c_name, t_proc);
1573 }
1574 else
1575 {
1576 ERROR ("java plugin: cjni_api_register_match_target: "
1577 "Don't know whether to create a match or a target.");
1578 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1579 return (-1);
1580 }
1582 if (status != 0)
1583 {
1584 ERROR ("java plugin: cjni_api_register_match_target: "
1585 "%s failed.",
1586 (type == CB_TYPE_MATCH) ? "fc_register_match" : "fc_register_target");
1587 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1588 return (-1);
1589 }
1591 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1593 return (0);
1594 } /* }}} jint cjni_api_register_match_target */
1596 static jint JNICALL cjni_api_register_match (JNIEnv *jvm_env, /* {{{ */
1597 jobject this, jobject o_name, jobject o_match)
1598 {
1599 return (cjni_api_register_match_target (jvm_env, this, o_name, o_match,
1600 CB_TYPE_MATCH));
1601 } /* }}} jint cjni_api_register_match */
1603 static jint JNICALL cjni_api_register_target (JNIEnv *jvm_env, /* {{{ */
1604 jobject this, jobject o_name, jobject o_target)
1605 {
1606 return (cjni_api_register_match_target (jvm_env, this, o_name, o_target,
1607 CB_TYPE_TARGET));
1608 } /* }}} jint cjni_api_register_target */
1610 static void JNICALL cjni_api_log (JNIEnv *jvm_env, /* {{{ */
1611 jobject this, jint severity, jobject o_message)
1612 {
1613 const char *c_str;
1615 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, o_message, 0);
1616 if (c_str == NULL)
1617 {
1618 ERROR ("java plugin: cjni_api_log: GetStringUTFChars failed.");
1619 return;
1620 }
1622 if (severity < LOG_ERR)
1623 severity = LOG_ERR;
1624 if (severity > LOG_DEBUG)
1625 severity = LOG_DEBUG;
1627 plugin_log (severity, "%s", c_str);
1629 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_message, c_str);
1630 } /* }}} void cjni_api_log */
1632 /* List of ``native'' functions, i. e. C-functions that can be called from
1633 * Java. */
1634 static JNINativeMethod jni_api_functions[] = /* {{{ */
1635 {
1636 { "dispatchValues",
1637 "(Lorg/collectd/api/ValueList;)I",
1638 cjni_api_dispatch_values },
1640 { "dispatchNotification",
1641 "(Lorg/collectd/api/Notification;)I",
1642 cjni_api_dispatch_notification },
1644 { "getDS",
1645 "(Ljava/lang/String;)Lorg/collectd/api/DataSet;",
1646 cjni_api_get_ds },
1648 { "registerConfig",
1649 "(Ljava/lang/String;Lorg/collectd/api/CollectdConfigInterface;)I",
1650 cjni_api_register_config },
1652 { "registerInit",
1653 "(Ljava/lang/String;Lorg/collectd/api/CollectdInitInterface;)I",
1654 cjni_api_register_init },
1656 { "registerRead",
1657 "(Ljava/lang/String;Lorg/collectd/api/CollectdReadInterface;)I",
1658 cjni_api_register_read },
1660 { "registerWrite",
1661 "(Ljava/lang/String;Lorg/collectd/api/CollectdWriteInterface;)I",
1662 cjni_api_register_write },
1664 { "registerFlush",
1665 "(Ljava/lang/String;Lorg/collectd/api/CollectdFlushInterface;)I",
1666 cjni_api_register_flush },
1668 { "registerShutdown",
1669 "(Ljava/lang/String;Lorg/collectd/api/CollectdShutdownInterface;)I",
1670 cjni_api_register_shutdown },
1672 { "registerLog",
1673 "(Ljava/lang/String;Lorg/collectd/api/CollectdLogInterface;)I",
1674 cjni_api_register_log },
1676 { "registerNotification",
1677 "(Ljava/lang/String;Lorg/collectd/api/CollectdNotificationInterface;)I",
1678 cjni_api_register_notification },
1680 { "registerMatch",
1681 "(Ljava/lang/String;Lorg/collectd/api/CollectdMatchFactoryInterface;)I",
1682 cjni_api_register_match },
1684 { "registerTarget",
1685 "(Ljava/lang/String;Lorg/collectd/api/CollectdTargetFactoryInterface;)I",
1686 cjni_api_register_target },
1688 { "log",
1689 "(ILjava/lang/String;)V",
1690 cjni_api_log },
1691 };
1692 static size_t jni_api_functions_num = sizeof (jni_api_functions)
1693 / sizeof (jni_api_functions[0]);
1694 /* }}} */
1696 /*
1697 * Functions
1698 */
1699 /* Allocate a `cjni_callback_info_t' given the type and objects necessary for
1700 * all registration functions. */
1701 static cjni_callback_info_t *cjni_callback_info_create (JNIEnv *jvm_env, /* {{{ */
1702 jobject o_name, jobject o_callback, int type)
1703 {
1704 const char *c_name;
1705 cjni_callback_info_t *cbi;
1706 const char *method_name;
1707 const char *method_signature;
1709 switch (type)
1710 {
1711 case CB_TYPE_CONFIG:
1712 method_name = "config";
1713 method_signature = "(Lorg/collectd/api/OConfigItem;)I";
1714 break;
1716 case CB_TYPE_INIT:
1717 method_name = "init";
1718 method_signature = "()I";
1719 break;
1721 case CB_TYPE_READ:
1722 method_name = "read";
1723 method_signature = "()I";
1724 break;
1726 case CB_TYPE_WRITE:
1727 method_name = "write";
1728 method_signature = "(Lorg/collectd/api/ValueList;)I";
1729 break;
1731 case CB_TYPE_FLUSH:
1732 method_name = "flush";
1733 method_signature = "(Ljava/lang/Number;Ljava/lang/String;)I";
1734 break;
1736 case CB_TYPE_SHUTDOWN:
1737 method_name = "shutdown";
1738 method_signature = "()I";
1739 break;
1741 case CB_TYPE_LOG:
1742 method_name = "log";
1743 method_signature = "(ILjava/lang/String;)V";
1744 break;
1746 case CB_TYPE_NOTIFICATION:
1747 method_name = "notification";
1748 method_signature = "(Lorg/collectd/api/Notification;)I";
1749 break;
1751 case CB_TYPE_MATCH:
1752 method_name = "createMatch";
1753 method_signature = "(Lorg/collectd/api/OConfigItem;)"
1754 "Lorg/collectd/api/CollectdMatchInterface;";
1755 break;
1757 case CB_TYPE_TARGET:
1758 method_name = "createTarget";
1759 method_signature = "(Lorg/collectd/api/OConfigItem;)"
1760 "Lorg/collectd/api/CollectdTargetInterface;";
1761 break;
1763 default:
1764 ERROR ("java plugin: cjni_callback_info_create: Unknown type: %#x",
1765 type);
1766 return (NULL);
1767 }
1769 c_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_name, 0);
1770 if (c_name == NULL)
1771 {
1772 ERROR ("java plugin: cjni_callback_info_create: "
1773 "GetStringUTFChars failed.");
1774 return (NULL);
1775 }
1777 cbi = (cjni_callback_info_t *) malloc (sizeof (*cbi));
1778 if (cbi == NULL)
1779 {
1780 ERROR ("java plugin: cjni_callback_info_create: malloc failed.");
1781 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1782 return (NULL);
1783 }
1784 memset (cbi, 0, sizeof (*cbi));
1785 cbi->type = type;
1787 cbi->name = strdup (c_name);
1788 if (cbi->name == NULL)
1789 {
1790 pthread_mutex_unlock (&java_callbacks_lock);
1791 ERROR ("java plugin: cjni_callback_info_create: strdup failed.");
1792 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1793 sfree (cbi);
1794 return (NULL);
1795 }
1797 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1799 cbi->object = (*jvm_env)->NewGlobalRef (jvm_env, o_callback);
1800 if (cbi->object == NULL)
1801 {
1802 ERROR ("java plugin: cjni_callback_info_create: NewGlobalRef failed.");
1803 sfree (cbi->name);
1804 sfree (cbi);
1805 return (NULL);
1806 }
1808 cbi->class = (*jvm_env)->GetObjectClass (jvm_env, cbi->object);
1809 if (cbi->class == NULL)
1810 {
1811 ERROR ("java plugin: cjni_callback_info_create: GetObjectClass failed.");
1812 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1813 sfree (cbi->name);
1814 sfree (cbi);
1815 return (NULL);
1816 }
1818 cbi->method = (*jvm_env)->GetMethodID (jvm_env, cbi->class,
1819 method_name, method_signature);
1820 if (cbi->method == NULL)
1821 {
1822 ERROR ("java plugin: cjni_callback_info_create: "
1823 "Cannot find the `%s' method with signature `%s'.",
1824 method_name, method_signature);
1825 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1826 sfree (cbi->name);
1827 sfree (cbi);
1828 return (NULL);
1829 }
1831 return (cbi);
1832 } /* }}} cjni_callback_info_t cjni_callback_info_create */
1834 /* Allocate a `cjni_callback_info_t' via `cjni_callback_info_create' and add it
1835 * to the global `java_callbacks' variable. This is used for `config', `init',
1836 * and `shutdown' callbacks. */
1837 static int cjni_callback_register (JNIEnv *jvm_env, /* {{{ */
1838 jobject o_name, jobject o_callback, int type)
1839 {
1840 cjni_callback_info_t *cbi;
1841 cjni_callback_info_t *tmp;
1842 #if COLLECT_DEBUG
1843 const char *type_str;
1844 #endif
1846 cbi = cjni_callback_info_create (jvm_env, o_name, o_callback, type);
1847 if (cbi == NULL)
1848 return (-1);
1850 #if COLLECT_DEBUG
1851 switch (type)
1852 {
1853 case CB_TYPE_CONFIG:
1854 type_str = "config";
1855 break;
1857 case CB_TYPE_INIT:
1858 type_str = "init";
1859 break;
1861 case CB_TYPE_SHUTDOWN:
1862 type_str = "shutdown";
1863 break;
1865 case CB_TYPE_MATCH:
1866 type_str = "match";
1867 break;
1869 case CB_TYPE_TARGET:
1870 type_str = "target";
1871 break;
1873 default:
1874 type_str = "<unknown>";
1875 }
1876 DEBUG ("java plugin: Registering new %s callback: %s",
1877 type_str, cbi->name);
1878 #endif
1880 pthread_mutex_lock (&java_callbacks_lock);
1882 tmp = (cjni_callback_info_t *) realloc (java_callbacks,
1883 (java_callbacks_num + 1) * sizeof (*java_callbacks));
1884 if (tmp == NULL)
1885 {
1886 pthread_mutex_unlock (&java_callbacks_lock);
1887 ERROR ("java plugin: cjni_callback_register: realloc failed.");
1889 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1890 free (cbi);
1892 return (-1);
1893 }
1894 java_callbacks = tmp;
1895 java_callbacks[java_callbacks_num] = *cbi;
1896 java_callbacks_num++;
1898 pthread_mutex_unlock (&java_callbacks_lock);
1900 free (cbi);
1901 return (0);
1902 } /* }}} int cjni_callback_register */
1904 /* Callback for `pthread_key_create'. It frees the data contained in
1905 * `jvm_env_key' and prints a warning if the reference counter is not zero. */
1906 static void cjni_jvm_env_destroy (void *args) /* {{{ */
1907 {
1908 cjni_jvm_env_t *cjni_env;
1910 if (args == NULL)
1911 return;
1913 cjni_env = (cjni_jvm_env_t *) args;
1915 if (cjni_env->reference_counter > 0)
1916 {
1917 ERROR ("java plugin: cjni_jvm_env_destroy: "
1918 "cjni_env->reference_counter = %i;", cjni_env->reference_counter);
1919 }
1921 if (cjni_env->jvm_env != NULL)
1922 {
1923 ERROR ("java plugin: cjni_jvm_env_destroy: cjni_env->jvm_env = %p;",
1924 (void *) cjni_env->jvm_env);
1925 }
1927 /* The pointer is allocated in `cjni_thread_attach' */
1928 free (cjni_env);
1929 } /* }}} void cjni_jvm_env_destroy */
1931 /* Register ``native'' functions with the JVM. Native functions are C-functions
1932 * that can be called by Java code. */
1933 static int cjni_init_native (JNIEnv *jvm_env) /* {{{ */
1934 {
1935 jclass api_class_ptr;
1936 int status;
1938 api_class_ptr = (*jvm_env)->FindClass (jvm_env, "org/collectd/api/Collectd");
1939 if (api_class_ptr == NULL)
1940 {
1941 ERROR ("cjni_init_native: Cannot find the API class \"org.collectd.api"
1942 ".Collectd\". Please set the correct class path "
1943 "using 'JVMArg \"-Djava.class.path=...\"'.");
1944 return (-1);
1945 }
1947 status = (*jvm_env)->RegisterNatives (jvm_env, api_class_ptr,
1948 jni_api_functions, (jint) jni_api_functions_num);
1949 if (status != 0)
1950 {
1951 ERROR ("cjni_init_native: RegisterNatives failed with status %i.", status);
1952 return (-1);
1953 }
1955 return (0);
1956 } /* }}} int cjni_init_native */
1958 /* Create the JVM. This is called when the first thread tries to access the JVM
1959 * via cjni_thread_attach. */
1960 static int cjni_create_jvm (void) /* {{{ */
1961 {
1962 JNIEnv *jvm_env;
1963 JavaVMInitArgs vm_args;
1964 JavaVMOption vm_options[jvm_argc];
1966 int status;
1967 size_t i;
1969 if (jvm != NULL)
1970 return (0);
1972 status = pthread_key_create (&jvm_env_key, cjni_jvm_env_destroy);
1973 if (status != 0)
1974 {
1975 ERROR ("java plugin: cjni_create_jvm: pthread_key_create failed "
1976 "with status %i.", status);
1977 return (-1);
1978 }
1980 jvm_env = NULL;
1982 memset (&vm_args, 0, sizeof (vm_args));
1983 vm_args.version = JNI_VERSION_1_2;
1984 vm_args.options = vm_options;
1985 vm_args.nOptions = (jint) jvm_argc;
1987 for (i = 0; i < jvm_argc; i++)
1988 {
1989 DEBUG ("java plugin: cjni_create_jvm: jvm_argv[%zu] = %s",
1990 i, jvm_argv[i]);
1991 vm_args.options[i].optionString = jvm_argv[i];
1992 }
1994 status = JNI_CreateJavaVM (&jvm, (void *) &jvm_env, (void *) &vm_args);
1995 if (status != 0)
1996 {
1997 ERROR ("java plugin: cjni_create_jvm: "
1998 "JNI_CreateJavaVM failed with status %i.",
1999 status);
2000 return (-1);
2001 }
2002 assert (jvm != NULL);
2003 assert (jvm_env != NULL);
2005 /* Call RegisterNatives */
2006 status = cjni_init_native (jvm_env);
2007 if (status != 0)
2008 {
2009 ERROR ("java plugin: cjni_create_jvm: cjni_init_native failed.");
2010 return (-1);
2011 }
2013 DEBUG ("java plugin: The JVM has been created.");
2014 return (0);
2015 } /* }}} int cjni_create_jvm */
2017 /* Increase the reference counter to the JVM for this thread. If it was zero,
2018 * attach the JVM first. */
2019 static JNIEnv *cjni_thread_attach (void) /* {{{ */
2020 {
2021 cjni_jvm_env_t *cjni_env;
2022 JNIEnv *jvm_env;
2024 /* If we're the first thread to access the JVM, we'll have to create it
2025 * first.. */
2026 if (jvm == NULL)
2027 {
2028 int status;
2030 status = cjni_create_jvm ();
2031 if (status != 0)
2032 {
2033 ERROR ("java plugin: cjni_thread_attach: cjni_create_jvm failed.");
2034 return (NULL);
2035 }
2036 }
2037 assert (jvm != NULL);
2039 cjni_env = pthread_getspecific (jvm_env_key);
2040 if (cjni_env == NULL)
2041 {
2042 /* This pointer is free'd in `cjni_jvm_env_destroy'. */
2043 cjni_env = (cjni_jvm_env_t *) malloc (sizeof (*cjni_env));
2044 if (cjni_env == NULL)
2045 {
2046 ERROR ("java plugin: cjni_thread_attach: malloc failed.");
2047 return (NULL);
2048 }
2049 memset (cjni_env, 0, sizeof (*cjni_env));
2050 cjni_env->reference_counter = 0;
2051 cjni_env->jvm_env = NULL;
2053 pthread_setspecific (jvm_env_key, cjni_env);
2054 }
2056 if (cjni_env->reference_counter > 0)
2057 {
2058 cjni_env->reference_counter++;
2059 jvm_env = cjni_env->jvm_env;
2060 }
2061 else
2062 {
2063 int status;
2064 JavaVMAttachArgs args;
2066 assert (cjni_env->jvm_env == NULL);
2068 memset (&args, 0, sizeof (args));
2069 args.version = JNI_VERSION_1_2;
2071 status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, (void *) &args);
2072 if (status != 0)
2073 {
2074 ERROR ("java plugin: cjni_thread_attach: AttachCurrentThread failed "
2075 "with status %i.", status);
2076 return (NULL);
2077 }
2079 cjni_env->reference_counter = 1;
2080 cjni_env->jvm_env = jvm_env;
2081 }
2083 DEBUG ("java plugin: cjni_thread_attach: cjni_env->reference_counter = %i",
2084 cjni_env->reference_counter);
2085 assert (jvm_env != NULL);
2086 return (jvm_env);
2087 } /* }}} JNIEnv *cjni_thread_attach */
2089 /* Decrease the reference counter of this thread. If it reaches zero, detach
2090 * from the JVM. */
2091 static int cjni_thread_detach (void) /* {{{ */
2092 {
2093 cjni_jvm_env_t *cjni_env;
2094 int status;
2096 cjni_env = pthread_getspecific (jvm_env_key);
2097 if (cjni_env == NULL)
2098 {
2099 ERROR ("java plugin: cjni_thread_detach: pthread_getspecific failed.");
2100 return (-1);
2101 }
2103 assert (cjni_env->reference_counter > 0);
2104 assert (cjni_env->jvm_env != NULL);
2106 cjni_env->reference_counter--;
2107 DEBUG ("java plugin: cjni_thread_detach: cjni_env->reference_counter = %i",
2108 cjni_env->reference_counter);
2110 if (cjni_env->reference_counter > 0)
2111 return (0);
2113 status = (*jvm)->DetachCurrentThread (jvm);
2114 if (status != 0)
2115 {
2116 ERROR ("java plugin: cjni_thread_detach: DetachCurrentThread failed "
2117 "with status %i.", status);
2118 }
2120 cjni_env->reference_counter = 0;
2121 cjni_env->jvm_env = NULL;
2123 return (0);
2124 } /* }}} int cjni_thread_detach */
2126 static int cjni_config_add_jvm_arg (oconfig_item_t *ci) /* {{{ */
2127 {
2128 char **tmp;
2130 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
2131 {
2132 WARNING ("java plugin: `JVMArg' needs exactly one string argument.");
2133 return (-1);
2134 }
2136 if (jvm != NULL)
2137 {
2138 ERROR ("java plugin: All `JVMArg' options MUST appear before all "
2139 "`LoadPlugin' options! The JVM is already started and I have to "
2140 "ignore this argument: %s",
2141 ci->values[0].value.string);
2142 return (-1);
2143 }
2145 tmp = (char **) realloc (jvm_argv, sizeof (char *) * (jvm_argc + 1));
2146 if (tmp == NULL)
2147 {
2148 ERROR ("java plugin: realloc failed.");
2149 return (-1);
2150 }
2151 jvm_argv = tmp;
2153 jvm_argv[jvm_argc] = strdup (ci->values[0].value.string);
2154 if (jvm_argv[jvm_argc] == NULL)
2155 {
2156 ERROR ("java plugin: strdup failed.");
2157 return (-1);
2158 }
2159 jvm_argc++;
2161 return (0);
2162 } /* }}} int cjni_config_add_jvm_arg */
2164 static int cjni_config_load_plugin (oconfig_item_t *ci) /* {{{ */
2165 {
2166 JNIEnv *jvm_env;
2167 java_plugin_class_t *class;
2168 jmethodID constructor_id;
2169 jobject tmp_object;
2171 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
2172 {
2173 WARNING ("java plugin: `LoadPlugin' needs exactly one string argument.");
2174 return (-1);
2175 }
2177 jvm_env = cjni_thread_attach ();
2178 if (jvm_env == NULL)
2179 return (-1);
2181 class = (java_plugin_class_t *) realloc (java_classes_list,
2182 (java_classes_list_len + 1) * sizeof (*java_classes_list));
2183 if (class == NULL)
2184 {
2185 ERROR ("java plugin: realloc failed.");
2186 cjni_thread_detach ();
2187 return (-1);
2188 }
2189 java_classes_list = class;
2190 class = java_classes_list + java_classes_list_len;
2192 memset (class, 0, sizeof (*class));
2193 class->name = strdup (ci->values[0].value.string);
2194 if (class->name == NULL)
2195 {
2196 ERROR ("java plugin: strdup failed.");
2197 cjni_thread_detach ();
2198 return (-1);
2199 }
2200 class->class = NULL;
2201 class->object = NULL;
2203 { /* Replace all dots ('.') with slashes ('/'). Dots are usually used
2204 thorough the Java community, but (Sun's) `FindClass' and friends need
2205 slashes. */
2206 size_t i;
2207 for (i = 0; class->name[i] != 0; i++)
2208 if (class->name[i] == '.')
2209 class->name[i] = '/';
2210 }
2212 DEBUG ("java plugin: Loading class %s", class->name);
2214 class->class = (*jvm_env)->FindClass (jvm_env, class->name);
2215 if (class->class == NULL)
2216 {
2217 ERROR ("java plugin: cjni_config_load_plugin: FindClass (%s) failed.",
2218 class->name);
2219 cjni_thread_detach ();
2220 free (class->name);
2221 return (-1);
2222 }
2224 constructor_id = (*jvm_env)->GetMethodID (jvm_env, class->class,
2225 "<init>", "()V");
2226 if (constructor_id == NULL)
2227 {
2228 ERROR ("java plugin: cjni_config_load_plugin: "
2229 "Could not find the constructor for `%s'.",
2230 class->name);
2231 cjni_thread_detach ();
2232 free (class->name);
2233 return (-1);
2234 }
2236 tmp_object = (*jvm_env)->NewObject (jvm_env, class->class,
2237 constructor_id);
2238 if (tmp_object != NULL)
2239 class->object = (*jvm_env)->NewGlobalRef (jvm_env, tmp_object);
2240 else
2241 class->object = NULL;
2242 if (class->object == NULL)
2243 {
2244 ERROR ("java plugin: cjni_config_load_plugin: "
2245 "Could create a new `%s' object.",
2246 class->name);
2247 cjni_thread_detach ();
2248 free (class->name);
2249 return (-1);
2250 }
2252 cjni_thread_detach ();
2254 java_classes_list_len++;
2256 return (0);
2257 } /* }}} int cjni_config_load_plugin */
2259 static int cjni_config_plugin_block (oconfig_item_t *ci) /* {{{ */
2260 {
2261 JNIEnv *jvm_env;
2262 cjni_callback_info_t *cbi;
2263 jobject o_ocitem;
2264 const char *name;
2265 size_t i;
2267 jclass class;
2268 jmethodID method;
2270 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
2271 {
2272 WARNING ("java plugin: `Plugin' blocks "
2273 "need exactly one string argument.");
2274 return (-1);
2275 }
2277 name = ci->values[0].value.string;
2279 cbi = NULL;
2280 for (i = 0; i < java_callbacks_num; i++)
2281 {
2282 if (java_callbacks[i].type != CB_TYPE_CONFIG)
2283 continue;
2285 if (strcmp (name, java_callbacks[i].name) != 0)
2286 continue;
2288 cbi = java_callbacks + i;
2289 break;
2290 }
2292 if (cbi == NULL)
2293 {
2294 NOTICE ("java plugin: Configuration block for `%s' found, but no such "
2295 "configuration callback has been registered. Please make sure, the "
2296 "`LoadPlugin' lines precede the `Plugin' blocks.",
2297 name);
2298 return (0);
2299 }
2301 DEBUG ("java plugin: Configuring %s", name);
2303 jvm_env = cjni_thread_attach ();
2304 if (jvm_env == NULL)
2305 return (-1);
2307 o_ocitem = ctoj_oconfig_item (jvm_env, ci);
2308 if (o_ocitem == NULL)
2309 {
2310 ERROR ("java plugin: cjni_config_plugin_block: ctoj_oconfig_item failed.");
2311 cjni_thread_detach ();
2312 return (-1);
2313 }
2315 class = (*jvm_env)->GetObjectClass (jvm_env, cbi->object);
2316 method = (*jvm_env)->GetMethodID (jvm_env, class,
2317 "config", "(Lorg/collectd/api/OConfigItem;)I");
2319 (*jvm_env)->CallIntMethod (jvm_env,
2320 cbi->object, method, o_ocitem);
2322 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
2323 cjni_thread_detach ();
2324 return (0);
2325 } /* }}} int cjni_config_plugin_block */
2327 static int cjni_config_perform (oconfig_item_t *ci) /* {{{ */
2328 {
2329 int success;
2330 int errors;
2331 int status;
2332 int i;
2334 success = 0;
2335 errors = 0;
2337 for (i = 0; i < ci->children_num; i++)
2338 {
2339 oconfig_item_t *child = ci->children + i;
2341 if (strcasecmp ("JVMArg", child->key) == 0)
2342 {
2343 status = cjni_config_add_jvm_arg (child);
2344 if (status == 0)
2345 success++;
2346 else
2347 errors++;
2348 }
2349 else if (strcasecmp ("LoadPlugin", child->key) == 0)
2350 {
2351 status = cjni_config_load_plugin (child);
2352 if (status == 0)
2353 success++;
2354 else
2355 errors++;
2356 }
2357 else if (strcasecmp ("Plugin", child->key) == 0)
2358 {
2359 status = cjni_config_plugin_block (child);
2360 if (status == 0)
2361 success++;
2362 else
2363 errors++;
2364 }
2365 else
2366 {
2367 WARNING ("java plugin: Option `%s' not allowed here.", child->key);
2368 errors++;
2369 }
2370 }
2372 DEBUG ("java plugin: jvm_argc = %zu;", jvm_argc);
2373 DEBUG ("java plugin: java_classes_list_len = %zu;", java_classes_list_len);
2375 if ((success == 0) && (errors > 0))
2376 {
2377 ERROR ("java plugin: All statements failed.");
2378 return (-1);
2379 }
2381 return (0);
2382 } /* }}} int cjni_config_perform */
2384 /* Copy the children of `ci' to the global `config_block' variable. */
2385 static int cjni_config_callback (oconfig_item_t *ci) /* {{{ */
2386 {
2387 oconfig_item_t *ci_copy;
2388 oconfig_item_t *tmp;
2390 assert (ci != NULL);
2391 if (ci->children_num == 0)
2392 return (0); /* nothing to do */
2394 ci_copy = oconfig_clone (ci);
2395 if (ci_copy == NULL)
2396 {
2397 ERROR ("java plugin: oconfig_clone failed.");
2398 return (-1);
2399 }
2401 if (config_block == NULL)
2402 {
2403 config_block = ci_copy;
2404 return (0);
2405 }
2407 tmp = realloc (config_block->children,
2408 (config_block->children_num + ci_copy->children_num) * sizeof (*tmp));
2409 if (tmp == NULL)
2410 {
2411 ERROR ("java plugin: realloc failed.");
2412 oconfig_free (ci_copy);
2413 return (-1);
2414 }
2415 config_block->children = tmp;
2417 /* Copy the pointers */
2418 memcpy (config_block->children + config_block->children_num,
2419 ci_copy->children,
2420 ci_copy->children_num * sizeof (*ci_copy->children));
2421 config_block->children_num += ci_copy->children_num;
2423 /* Delete the pointers from the copy, so `oconfig_free' can't free them. */
2424 memset (ci_copy->children, 0,
2425 ci_copy->children_num * sizeof (*ci_copy->children));
2426 ci_copy->children_num = 0;
2428 oconfig_free (ci_copy);
2430 return (0);
2431 } /* }}} int cjni_config_callback */
2433 /* Free the data contained in the `user_data_t' pointer passed to `cjni_read'
2434 * and `cjni_write'. In particular, delete the global reference to the Java
2435 * object. */
2436 static void cjni_callback_info_destroy (void *arg) /* {{{ */
2437 {
2438 JNIEnv *jvm_env;
2439 cjni_callback_info_t *cbi;
2441 DEBUG ("java plugin: cjni_callback_info_destroy (arg = %p);", arg);
2443 cbi = (cjni_callback_info_t *) arg;
2445 /* This condition can occurr when shutting down. */
2446 if (jvm == NULL)
2447 {
2448 sfree (cbi);
2449 return;
2450 }
2452 if (arg == NULL)
2453 return;
2455 jvm_env = cjni_thread_attach ();
2456 if (jvm_env == NULL)
2457 {
2458 ERROR ("java plugin: cjni_callback_info_destroy: cjni_thread_attach failed.");
2459 return;
2460 }
2462 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
2464 cbi->method = NULL;
2465 cbi->object = NULL;
2466 cbi->class = NULL;
2467 free (cbi);
2469 cjni_thread_detach ();
2470 } /* }}} void cjni_callback_info_destroy */
2472 /* Call the CB_TYPE_READ callback pointed to by the `user_data_t' pointer. */
2473 static int cjni_read (user_data_t *ud) /* {{{ */
2474 {
2475 JNIEnv *jvm_env;
2476 cjni_callback_info_t *cbi;
2477 int ret_status;
2479 if (jvm == NULL)
2480 {
2481 ERROR ("java plugin: cjni_read: jvm == NULL");
2482 return (-1);
2483 }
2485 if ((ud == NULL) || (ud->data == NULL))
2486 {
2487 ERROR ("java plugin: cjni_read: Invalid user data.");
2488 return (-1);
2489 }
2491 jvm_env = cjni_thread_attach ();
2492 if (jvm_env == NULL)
2493 return (-1);
2495 cbi = (cjni_callback_info_t *) ud->data;
2497 ret_status = (*jvm_env)->CallIntMethod (jvm_env, cbi->object,
2498 cbi->method);
2500 cjni_thread_detach ();
2501 return (ret_status);
2502 } /* }}} int cjni_read */
2504 /* Call the CB_TYPE_WRITE callback pointed to by the `user_data_t' pointer. */
2505 static int cjni_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
2506 user_data_t *ud)
2507 {
2508 JNIEnv *jvm_env;
2509 cjni_callback_info_t *cbi;
2510 jobject vl_java;
2511 int ret_status;
2513 if (jvm == NULL)
2514 {
2515 ERROR ("java plugin: cjni_write: jvm == NULL");
2516 return (-1);
2517 }
2519 if ((ud == NULL) || (ud->data == NULL))
2520 {
2521 ERROR ("java plugin: cjni_write: Invalid user data.");
2522 return (-1);
2523 }
2525 jvm_env = cjni_thread_attach ();
2526 if (jvm_env == NULL)
2527 return (-1);
2529 cbi = (cjni_callback_info_t *) ud->data;
2531 vl_java = ctoj_value_list (jvm_env, ds, vl);
2532 if (vl_java == NULL)
2533 {
2534 ERROR ("java plugin: cjni_write: ctoj_value_list failed.");
2535 cjni_thread_detach ();
2536 return (-1);
2537 }
2539 ret_status = (*jvm_env)->CallIntMethod (jvm_env,
2540 cbi->object, cbi->method, vl_java);
2542 (*jvm_env)->DeleteLocalRef (jvm_env, vl_java);
2544 cjni_thread_detach ();
2545 return (ret_status);
2546 } /* }}} int cjni_write */
2548 /* Call the CB_TYPE_FLUSH callback pointed to by the `user_data_t' pointer. */
2549 static int cjni_flush (cdtime_t timeout, const char *identifier, /* {{{ */
2550 user_data_t *ud)
2551 {
2552 JNIEnv *jvm_env;
2553 cjni_callback_info_t *cbi;
2554 jobject o_timeout;
2555 jobject o_identifier;
2556 int ret_status;
2558 if (jvm == NULL)
2559 {
2560 ERROR ("java plugin: cjni_flush: jvm == NULL");
2561 return (-1);
2562 }
2564 if ((ud == NULL) || (ud->data == NULL))
2565 {
2566 ERROR ("java plugin: cjni_flush: Invalid user data.");
2567 return (-1);
2568 }
2570 jvm_env = cjni_thread_attach ();
2571 if (jvm_env == NULL)
2572 return (-1);
2574 cbi = (cjni_callback_info_t *) ud->data;
2576 o_timeout = ctoj_jdouble_to_number (jvm_env,
2577 (jdouble) CDTIME_T_TO_DOUBLE (timeout));
2578 if (o_timeout == NULL)
2579 {
2580 ERROR ("java plugin: cjni_flush: Converting double "
2581 "to Number object failed.");
2582 cjni_thread_detach ();
2583 return (-1);
2584 }
2586 o_identifier = NULL;
2587 if (identifier != NULL)
2588 {
2589 o_identifier = (*jvm_env)->NewStringUTF (jvm_env, identifier);
2590 if (o_identifier == NULL)
2591 {
2592 (*jvm_env)->DeleteLocalRef (jvm_env, o_timeout);
2593 ERROR ("java plugin: cjni_flush: NewStringUTF failed.");
2594 cjni_thread_detach ();
2595 return (-1);
2596 }
2597 }
2599 ret_status = (*jvm_env)->CallIntMethod (jvm_env,
2600 cbi->object, cbi->method, o_timeout, o_identifier);
2602 (*jvm_env)->DeleteLocalRef (jvm_env, o_identifier);
2603 (*jvm_env)->DeleteLocalRef (jvm_env, o_timeout);
2605 cjni_thread_detach ();
2606 return (ret_status);
2607 } /* }}} int cjni_flush */
2609 /* Call the CB_TYPE_LOG callback pointed to by the `user_data_t' pointer. */
2610 static void cjni_log (int severity, const char *message, /* {{{ */
2611 user_data_t *ud)
2612 {
2613 JNIEnv *jvm_env;
2614 cjni_callback_info_t *cbi;
2615 jobject o_message;
2617 if (jvm == NULL)
2618 return;
2620 if ((ud == NULL) || (ud->data == NULL))
2621 return;
2623 jvm_env = cjni_thread_attach ();
2624 if (jvm_env == NULL)
2625 return;
2627 cbi = (cjni_callback_info_t *) ud->data;
2629 o_message = (*jvm_env)->NewStringUTF (jvm_env, message);
2630 if (o_message == NULL)
2631 {
2632 cjni_thread_detach ();
2633 return;
2634 }
2636 (*jvm_env)->CallVoidMethod (jvm_env,
2637 cbi->object, cbi->method, (jint) severity, o_message);
2639 (*jvm_env)->DeleteLocalRef (jvm_env, o_message);
2641 cjni_thread_detach ();
2642 } /* }}} void cjni_log */
2644 /* Call the CB_TYPE_NOTIFICATION callback pointed to by the `user_data_t'
2645 * pointer. */
2646 static int cjni_notification (const notification_t *n, /* {{{ */
2647 user_data_t *ud)
2648 {
2649 JNIEnv *jvm_env;
2650 cjni_callback_info_t *cbi;
2651 jobject o_notification;
2652 int ret_status;
2654 if (jvm == NULL)
2655 {
2656 ERROR ("java plugin: cjni_read: jvm == NULL");
2657 return (-1);
2658 }
2660 if ((ud == NULL) || (ud->data == NULL))
2661 {
2662 ERROR ("java plugin: cjni_read: Invalid user data.");
2663 return (-1);
2664 }
2666 jvm_env = cjni_thread_attach ();
2667 if (jvm_env == NULL)
2668 return (-1);
2670 cbi = (cjni_callback_info_t *) ud->data;
2672 o_notification = ctoj_notification (jvm_env, n);
2673 if (o_notification == NULL)
2674 {
2675 ERROR ("java plugin: cjni_notification: ctoj_notification failed.");
2676 cjni_thread_detach ();
2677 return (-1);
2678 }
2680 ret_status = (*jvm_env)->CallIntMethod (jvm_env,
2681 cbi->object, cbi->method, o_notification);
2683 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
2685 cjni_thread_detach ();
2686 return (ret_status);
2687 } /* }}} int cjni_notification */
2689 /* Callbacks for matches implemented in Java */
2690 static int cjni_match_target_create (const oconfig_item_t *ci, /* {{{ */
2691 void **user_data)
2692 {
2693 JNIEnv *jvm_env;
2694 cjni_callback_info_t *cbi_ret;
2695 cjni_callback_info_t *cbi_factory;
2696 const char *name;
2697 jobject o_ci;
2698 jobject o_tmp;
2699 int type;
2700 size_t i;
2702 cbi_ret = NULL;
2703 o_ci = NULL;
2704 jvm_env = NULL;
2706 #define BAIL_OUT(status) \
2707 if (cbi_ret != NULL) { \
2708 free (cbi_ret->name); \
2709 if ((jvm_env != NULL) && (cbi_ret->object != NULL)) \
2710 (*jvm_env)->DeleteLocalRef (jvm_env, cbi_ret->object); \
2711 } \
2712 free (cbi_ret); \
2713 if (o_ci != NULL) \
2714 (*jvm_env)->DeleteLocalRef (jvm_env, o_ci); \
2715 cjni_thread_detach (); \
2716 return (status)
2718 if (jvm == NULL)
2719 {
2720 ERROR ("java plugin: cjni_read: jvm == NULL");
2721 return (-1);
2722 }
2724 jvm_env = cjni_thread_attach ();
2725 if (jvm_env == NULL)
2726 return (-1);
2728 /* Find out whether to create a match or a target. */
2729 if (strcasecmp ("Match", ci->key) == 0)
2730 type = CB_TYPE_MATCH;
2731 else if (strcasecmp ("Target", ci->key) == 0)
2732 type = CB_TYPE_TARGET;
2733 else
2734 {
2735 ERROR ("java plugin: cjni_match_target_create: Can't figure out whether "
2736 "to create a match or a target.");
2737 BAIL_OUT (-1);
2738 }
2740 /* This is the name of the match we should create. */
2741 name = ci->values[0].value.string;
2743 /* Lets see if we have a matching factory here.. */
2744 cbi_factory = NULL;
2745 for (i = 0; i < java_callbacks_num; i++)
2746 {
2747 if (java_callbacks[i].type != type)
2748 continue;
2750 if (strcmp (name, java_callbacks[i].name) != 0)
2751 continue;
2753 cbi_factory = java_callbacks + i;
2754 break;
2755 }
2757 /* Nope, no factory for that name.. */
2758 if (cbi_factory == NULL)
2759 {
2760 ERROR ("java plugin: cjni_match_target_create: "
2761 "No such match factory registered: %s",
2762 name);
2763 BAIL_OUT (-1);
2764 }
2766 /* We convert `ci' to its Java equivalent.. */
2767 o_ci = ctoj_oconfig_item (jvm_env, ci);
2768 if (o_ci == NULL)
2769 {
2770 ERROR ("java plugin: cjni_match_target_create: "
2771 "ctoj_oconfig_item failed.");
2772 BAIL_OUT (-1);
2773 }
2775 /* Allocate a new callback info structure. This is going to be our user_data
2776 * pointer. */
2777 cbi_ret = (cjni_callback_info_t *) malloc (sizeof (*cbi_ret));
2778 if (cbi_ret == NULL)
2779 {
2780 ERROR ("java plugin: cjni_match_target_create: malloc failed.");
2781 BAIL_OUT (-1);
2782 }
2783 memset (cbi_ret, 0, sizeof (*cbi_ret));
2784 cbi_ret->object = NULL;
2785 cbi_ret->type = type;
2787 /* Lets fill the callback info structure.. First, the name: */
2788 cbi_ret->name = strdup (name);
2789 if (cbi_ret->name == NULL)
2790 {
2791 ERROR ("java plugin: cjni_match_target_create: strdup failed.");
2792 BAIL_OUT (-1);
2793 }
2795 /* Then call the factory method so it creates a new object for us. */
2796 o_tmp = (*jvm_env)->CallObjectMethod (jvm_env,
2797 cbi_factory->object, cbi_factory->method, o_ci);
2798 if (o_tmp == NULL)
2799 {
2800 ERROR ("java plugin: cjni_match_target_create: CallObjectMethod failed.");
2801 BAIL_OUT (-1);
2802 }
2804 cbi_ret->object = (*jvm_env)->NewGlobalRef (jvm_env, o_tmp);
2805 if (o_tmp == NULL)
2806 {
2807 ERROR ("java plugin: cjni_match_target_create: NewGlobalRef failed.");
2808 BAIL_OUT (-1);
2809 }
2811 /* This is the class of the match. It is possibly different from the class of
2812 * the match-factory! */
2813 cbi_ret->class = (*jvm_env)->GetObjectClass (jvm_env, cbi_ret->object);
2814 if (cbi_ret->class == NULL)
2815 {
2816 ERROR ("java plugin: cjni_match_target_create: GetObjectClass failed.");
2817 BAIL_OUT (-1);
2818 }
2820 /* Lookup the `int match (DataSet, ValueList)' method. */
2821 cbi_ret->method = (*jvm_env)->GetMethodID (jvm_env, cbi_ret->class,
2822 /* method name = */ (type == CB_TYPE_MATCH) ? "match" : "invoke",
2823 "(Lorg/collectd/api/DataSet;Lorg/collectd/api/ValueList;)I");
2824 if (cbi_ret->method == NULL)
2825 {
2826 ERROR ("java plugin: cjni_match_target_create: GetMethodID failed.");
2827 BAIL_OUT (-1);
2828 }
2830 /* Return the newly created match via the user_data pointer. */
2831 *user_data = (void *) cbi_ret;
2833 cjni_thread_detach ();
2835 DEBUG ("java plugin: cjni_match_target_create: "
2836 "Successfully created a `%s' %s.",
2837 cbi_ret->name, (type == CB_TYPE_MATCH) ? "match" : "target");
2839 /* Success! */
2840 return (0);
2841 #undef BAIL_OUT
2842 } /* }}} int cjni_match_target_create */
2844 static int cjni_match_target_destroy (void **user_data) /* {{{ */
2845 {
2846 cjni_callback_info_destroy (*user_data);
2847 *user_data = NULL;
2849 return (0);
2850 } /* }}} int cjni_match_target_destroy */
2852 static int cjni_match_target_invoke (const data_set_t *ds, /* {{{ */
2853 value_list_t *vl, notification_meta_t **meta, void **user_data)
2854 {
2855 JNIEnv *jvm_env;
2856 cjni_callback_info_t *cbi;
2857 jobject o_vl;
2858 jobject o_ds;
2859 int ret_status;
2860 int status;
2862 if (jvm == NULL)
2863 {
2864 ERROR ("java plugin: cjni_match_target_invoke: jvm == NULL");
2865 return (-1);
2866 }
2868 jvm_env = cjni_thread_attach ();
2869 if (jvm_env == NULL)
2870 return (-1);
2872 cbi = (cjni_callback_info_t *) *user_data;
2874 o_vl = ctoj_value_list (jvm_env, ds, vl);
2875 if (o_vl == NULL)
2876 {
2877 ERROR ("java plugin: cjni_match_target_invoke: ctoj_value_list failed.");
2878 cjni_thread_detach ();
2879 return (-1);
2880 }
2882 o_ds = ctoj_data_set (jvm_env, ds);
2883 if (o_ds == NULL)
2884 {
2885 ERROR ("java plugin: cjni_match_target_invoke: ctoj_value_list failed.");
2886 cjni_thread_detach ();
2887 return (-1);
2888 }
2890 ret_status = (*jvm_env)->CallIntMethod (jvm_env, cbi->object, cbi->method,
2891 o_ds, o_vl);
2893 DEBUG ("java plugin: cjni_match_target_invoke: Method returned %i.", ret_status);
2895 /* If we're executing a target, copy the `ValueList' back to our
2896 * `value_list_t'. */
2897 if (cbi->type == CB_TYPE_TARGET)
2898 {
2899 value_list_t new_vl;
2901 memset (&new_vl, 0, sizeof (new_vl));
2902 status = jtoc_value_list (jvm_env, &new_vl, o_vl);
2903 if (status != 0)
2904 {
2905 ERROR ("java plugin: cjni_match_target_invoke: "
2906 "jtoc_value_list failed.");
2907 }
2908 else /* if (status == 0) */
2909 {
2910 /* plugin_dispatch_values assures that this is dynamically allocated
2911 * memory. */
2912 sfree (vl->values);
2914 /* This will replace the vl->values pointer to a new, dynamically
2915 * allocated piece of memory. */
2916 memcpy (vl, &new_vl, sizeof (*vl));
2917 }
2918 } /* if (cbi->type == CB_TYPE_TARGET) */
2920 cjni_thread_detach ();
2921 return (ret_status);
2922 } /* }}} int cjni_match_target_invoke */
2924 /* Iterate over `java_callbacks' and call all CB_TYPE_INIT callbacks. */
2925 static int cjni_init_plugins (JNIEnv *jvm_env) /* {{{ */
2926 {
2927 int status;
2928 size_t i;
2930 for (i = 0; i < java_callbacks_num; i++)
2931 {
2932 if (java_callbacks[i].type != CB_TYPE_INIT)
2933 continue;
2935 DEBUG ("java plugin: Initializing %s", java_callbacks[i].name);
2937 status = (*jvm_env)->CallIntMethod (jvm_env,
2938 java_callbacks[i].object, java_callbacks[i].method);
2939 if (status != 0)
2940 {
2941 ERROR ("java plugin: Initializing `%s' failed with status %i. "
2942 "Removing read function.",
2943 java_callbacks[i].name, status);
2944 plugin_unregister_read (java_callbacks[i].name);
2945 }
2946 }
2948 return (0);
2949 } /* }}} int cjni_init_plugins */
2951 /* Iterate over `java_callbacks' and call all CB_TYPE_SHUTDOWN callbacks. */
2952 static int cjni_shutdown_plugins (JNIEnv *jvm_env) /* {{{ */
2953 {
2954 int status;
2955 size_t i;
2957 for (i = 0; i < java_callbacks_num; i++)
2958 {
2959 if (java_callbacks[i].type != CB_TYPE_SHUTDOWN)
2960 continue;
2962 DEBUG ("java plugin: Shutting down %s", java_callbacks[i].name);
2964 status = (*jvm_env)->CallIntMethod (jvm_env,
2965 java_callbacks[i].object, java_callbacks[i].method);
2966 if (status != 0)
2967 {
2968 ERROR ("java plugin: Shutting down `%s' failed with status %i. ",
2969 java_callbacks[i].name, status);
2970 }
2971 }
2973 return (0);
2974 } /* }}} int cjni_shutdown_plugins */
2977 static int cjni_shutdown (void) /* {{{ */
2978 {
2979 JNIEnv *jvm_env;
2980 JavaVMAttachArgs args;
2981 int status;
2982 size_t i;
2984 if (jvm == NULL)
2985 return (0);
2987 jvm_env = NULL;
2988 memset (&args, 0, sizeof (args));
2989 args.version = JNI_VERSION_1_2;
2991 status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, &args);
2992 if (status != 0)
2993 {
2994 ERROR ("java plugin: cjni_shutdown: AttachCurrentThread failed with status %i.",
2995 status);
2996 return (-1);
2997 }
2999 /* Execute all the shutdown functions registered by plugins. */
3000 cjni_shutdown_plugins (jvm_env);
3002 /* Release all the global references to callback functions */
3003 for (i = 0; i < java_callbacks_num; i++)
3004 {
3005 if (java_callbacks[i].object != NULL)
3006 {
3007 (*jvm_env)->DeleteGlobalRef (jvm_env, java_callbacks[i].object);
3008 java_callbacks[i].object = NULL;
3009 }
3010 sfree (java_callbacks[i].name);
3011 }
3012 java_callbacks_num = 0;
3013 sfree (java_callbacks);
3015 /* Release all the global references to directly loaded classes. */
3016 for (i = 0; i < java_classes_list_len; i++)
3017 {
3018 if (java_classes_list[i].object != NULL)
3019 {
3020 (*jvm_env)->DeleteGlobalRef (jvm_env, java_classes_list[i].object);
3021 java_classes_list[i].object = NULL;
3022 }
3023 sfree (java_classes_list[i].name);
3024 }
3025 java_classes_list_len = 0;
3026 sfree (java_classes_list);
3028 /* Destroy the JVM */
3029 DEBUG ("java plugin: Destroying the JVM.");
3030 (*jvm)->DestroyJavaVM (jvm);
3031 jvm = NULL;
3032 jvm_env = NULL;
3034 pthread_key_delete (jvm_env_key);
3036 /* Free the JVM argument list */
3037 for (i = 0; i < jvm_argc; i++)
3038 sfree (jvm_argv[i]);
3039 jvm_argc = 0;
3040 sfree (jvm_argv);
3042 return (0);
3043 } /* }}} int cjni_shutdown */
3045 /* Initialization: Create a JVM, load all configured classes and call their
3046 * `config' and `init' callback methods. */
3047 static int cjni_init (void) /* {{{ */
3048 {
3049 JNIEnv *jvm_env;
3051 if ((config_block == NULL) && (jvm == NULL))
3052 {
3053 ERROR ("java plugin: cjni_init: No configuration block for "
3054 "the java plugin was found.");
3055 return (-1);
3056 }
3058 if (config_block != NULL)
3059 {
3060 cjni_config_perform (config_block);
3061 oconfig_free (config_block);
3062 }
3064 if (jvm == NULL)
3065 {
3066 ERROR ("java plugin: cjni_init: jvm == NULL");
3067 return (-1);
3068 }
3070 jvm_env = cjni_thread_attach ();
3071 if (jvm_env == NULL)
3072 return (-1);
3074 cjni_init_plugins (jvm_env);
3076 cjni_thread_detach ();
3077 return (0);
3078 } /* }}} int cjni_init */
3080 void module_register (void)
3081 {
3082 plugin_register_complex_config ("java", cjni_config_callback);
3083 plugin_register_init ("java", cjni_init);
3084 plugin_register_shutdown ("java", cjni_shutdown);
3085 } /* void module_register (void) */
3087 /* vim: set sw=2 sts=2 et fdm=marker : */