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 collectd.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 <jni.h>
31 #if !defined(JNI_VERSION_1_2)
32 # error "Need JNI 1.2 compatible interface!"
33 #endif
35 /*
36 * Types
37 */
38 struct cjni_jvm_env_s /* {{{ */
39 {
40 JNIEnv *jvm_env;
41 int reference_counter;
42 };
43 typedef struct cjni_jvm_env_s cjni_jvm_env_t;
44 /* }}} */
46 struct java_plugin_class_s /* {{{ */
47 {
48 char *name;
49 jclass class;
50 jobject object;
51 };
52 typedef struct java_plugin_class_s java_plugin_class_t;
53 /* }}} */
55 #define CB_TYPE_CONFIG 1
56 #define CB_TYPE_INIT 2
57 #define CB_TYPE_READ 3
58 #define CB_TYPE_WRITE 4
59 #define CB_TYPE_FLUSH 5
60 #define CB_TYPE_SHUTDOWN 6
61 #define CB_TYPE_LOG 7
62 #define CB_TYPE_NOTIFICATION 8
63 #define CB_TYPE_MATCH 9
64 #define CB_TYPE_TARGET 10
65 struct cjni_callback_info_s /* {{{ */
66 {
67 char *name;
68 int type;
69 jclass class;
70 jobject object;
71 jmethodID method;
72 };
73 typedef struct cjni_callback_info_s cjni_callback_info_t;
74 /* }}} */
76 /*
77 * Global variables
78 */
79 static JavaVM *jvm = NULL;
80 static pthread_key_t jvm_env_key;
82 /* Configuration options for the JVM. */
83 static char **jvm_argv = NULL;
84 static size_t jvm_argc = 0;
86 /* List of class names to load */
87 static java_plugin_class_t *java_classes_list = NULL;
88 static size_t java_classes_list_len;
90 /* List of config, init, and shutdown callbacks. */
91 static cjni_callback_info_t *java_callbacks = NULL;
92 static size_t java_callbacks_num = 0;
93 static pthread_mutex_t java_callbacks_lock = PTHREAD_MUTEX_INITIALIZER;
95 static oconfig_item_t *config_block = NULL;
97 /*
98 * Prototypes
99 *
100 * Mostly functions that are needed by the Java interface (``native'')
101 * functions.
102 */
103 static void cjni_callback_info_destroy (void *arg);
104 static cjni_callback_info_t *cjni_callback_info_create (JNIEnv *jvm_env,
105 jobject o_name, jobject o_callback, int type);
106 static int cjni_callback_register (JNIEnv *jvm_env, jobject o_name,
107 jobject o_callback, int type);
108 static int cjni_read (user_data_t *user_data);
109 static int cjni_write (const data_set_t *ds, const value_list_t *vl,
110 user_data_t *ud);
111 static int cjni_flush (cdtime_t timeout, const char *identifier, user_data_t *ud);
112 static void cjni_log (int severity, const char *message, user_data_t *ud);
113 static int cjni_notification (const notification_t *n, user_data_t *ud);
115 /* Create, destroy, and match/invoke functions, used by both, matches AND
116 * targets. */
117 static int cjni_match_target_create (const oconfig_item_t *ci, void **user_data);
118 static int cjni_match_target_destroy (void **user_data);
119 static int cjni_match_target_invoke (const data_set_t *ds, value_list_t *vl,
120 notification_meta_t **meta, void **user_data);
122 /*
123 * C to Java conversion functions
124 */
125 static int ctoj_string (JNIEnv *jvm_env, /* {{{ */
126 const char *string,
127 jclass class_ptr, jobject object_ptr, const char *method_name)
128 {
129 jmethodID m_set;
130 jstring o_string;
132 /* Create a java.lang.String */
133 o_string = (*jvm_env)->NewStringUTF (jvm_env,
134 (string != NULL) ? string : "");
135 if (o_string == NULL)
136 {
137 ERROR ("java plugin: ctoj_string: NewStringUTF failed.");
138 return (-1);
139 }
141 /* Search for the `void setFoo (String s)' method. */
142 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
143 method_name, "(Ljava/lang/String;)V");
144 if (m_set == NULL)
145 {
146 ERROR ("java plugin: ctoj_string: Cannot find method `void %s (String)'.",
147 method_name);
148 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
149 return (-1);
150 }
152 /* Call the method. */
153 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, o_string);
155 /* Decrease reference counter on the java.lang.String object. */
156 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
158 return (0);
159 } /* }}} int ctoj_string */
161 static jstring ctoj_output_string (JNIEnv *jvm_env, /* {{{ */
162 const char *string)
163 {
164 jstring o_string;
166 /* Create a java.lang.String */
167 o_string = (*jvm_env)->NewStringUTF (jvm_env,
168 (string != NULL) ? string : "");
169 if (o_string == NULL)
170 {
171 ERROR ("java plugin: ctoj_output_string: NewStringUTF failed.");
172 return NULL;
173 }
175 return (o_string);
176 } /* }}} int ctoj_output_string */
178 static int ctoj_int (JNIEnv *jvm_env, /* {{{ */
179 jint value,
180 jclass class_ptr, jobject object_ptr, const char *method_name)
181 {
182 jmethodID m_set;
184 /* Search for the `void setFoo (int i)' method. */
185 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
186 method_name, "(I)V");
187 if (m_set == NULL)
188 {
189 ERROR ("java plugin: ctoj_int: Cannot find method `void %s (int)'.",
190 method_name);
191 return (-1);
192 }
194 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
196 return (0);
197 } /* }}} int ctoj_int */
199 static int ctoj_long (JNIEnv *jvm_env, /* {{{ */
200 jlong value,
201 jclass class_ptr, jobject object_ptr, const char *method_name)
202 {
203 jmethodID m_set;
205 /* Search for the `void setFoo (long l)' method. */
206 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
207 method_name, "(J)V");
208 if (m_set == NULL)
209 {
210 ERROR ("java plugin: ctoj_long: Cannot find method `void %s (long)'.",
211 method_name);
212 return (-1);
213 }
215 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
217 return (0);
218 } /* }}} int ctoj_long */
220 static int ctoj_double (JNIEnv *jvm_env, /* {{{ */
221 jdouble value,
222 jclass class_ptr, jobject object_ptr, const char *method_name)
223 {
224 jmethodID m_set;
226 /* Search for the `void setFoo (double d)' method. */
227 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
228 method_name, "(D)V");
229 if (m_set == NULL)
230 {
231 ERROR ("java plugin: ctoj_double: Cannot find method `void %s (double)'.",
232 method_name);
233 return (-1);
234 }
236 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
238 return (0);
239 } /* }}} int ctoj_double */
241 /* Convert a jlong to a java.lang.Number */
242 static jobject ctoj_jlong_to_number (JNIEnv *jvm_env, jlong value) /* {{{ */
243 {
244 jclass c_long;
245 jmethodID m_long_constructor;
247 /* Look up the java.lang.Long class */
248 c_long = (*jvm_env)->FindClass (jvm_env, "java/lang/Long");
249 if (c_long == NULL)
250 {
251 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
252 "java.lang.Long class failed.");
253 return (NULL);
254 }
256 m_long_constructor = (*jvm_env)->GetMethodID (jvm_env,
257 c_long, "<init>", "(J)V");
258 if (m_long_constructor == NULL)
259 {
260 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
261 "`Long (long)' constructor failed.");
262 return (NULL);
263 }
265 return ((*jvm_env)->NewObject (jvm_env,
266 c_long, m_long_constructor, value));
267 } /* }}} jobject ctoj_jlong_to_number */
269 /* Convert a jdouble to a java.lang.Number */
270 static jobject ctoj_jdouble_to_number (JNIEnv *jvm_env, jdouble value) /* {{{ */
271 {
272 jclass c_double;
273 jmethodID m_double_constructor;
275 /* Look up the java.lang.Long class */
276 c_double = (*jvm_env)->FindClass (jvm_env, "java/lang/Double");
277 if (c_double == NULL)
278 {
279 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
280 "java.lang.Double class failed.");
281 return (NULL);
282 }
284 m_double_constructor = (*jvm_env)->GetMethodID (jvm_env,
285 c_double, "<init>", "(D)V");
286 if (m_double_constructor == NULL)
287 {
288 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
289 "`Double (double)' constructor failed.");
290 return (NULL);
291 }
293 return ((*jvm_env)->NewObject (jvm_env,
294 c_double, m_double_constructor, value));
295 } /* }}} jobject ctoj_jdouble_to_number */
297 /* Convert a value_t to a java.lang.Number */
298 static jobject ctoj_value_to_number (JNIEnv *jvm_env, /* {{{ */
299 value_t value, int ds_type)
300 {
301 if (ds_type == DS_TYPE_COUNTER)
302 return (ctoj_jlong_to_number (jvm_env, (jlong) value.counter));
303 else if (ds_type == DS_TYPE_GAUGE)
304 return (ctoj_jdouble_to_number (jvm_env, (jdouble) value.gauge));
305 if (ds_type == DS_TYPE_DERIVE)
306 return (ctoj_jlong_to_number (jvm_env, (jlong) value.derive));
307 if (ds_type == DS_TYPE_ABSOLUTE)
308 return (ctoj_jlong_to_number (jvm_env, (jlong) value.absolute));
309 else
310 return (NULL);
311 } /* }}} jobject ctoj_value_to_number */
313 /* Convert a data_source_t to a org/collectd/api/DataSource */
314 static jobject ctoj_data_source (JNIEnv *jvm_env, /* {{{ */
315 const data_source_t *dsrc)
316 {
317 jclass c_datasource;
318 jmethodID m_datasource_constructor;
319 jobject o_datasource;
320 int status;
322 /* Look up the DataSource class */
323 c_datasource = (*jvm_env)->FindClass (jvm_env,
324 "org/collectd/api/DataSource");
325 if (c_datasource == NULL)
326 {
327 ERROR ("java plugin: ctoj_data_source: "
328 "FindClass (org/collectd/api/DataSource) failed.");
329 return (NULL);
330 }
332 /* Lookup the `ValueList ()' constructor. */
333 m_datasource_constructor = (*jvm_env)->GetMethodID (jvm_env, c_datasource,
334 "<init>", "()V");
335 if (m_datasource_constructor == NULL)
336 {
337 ERROR ("java plugin: ctoj_data_source: Cannot find the "
338 "`DataSource ()' constructor.");
339 return (NULL);
340 }
342 /* Create a new instance. */
343 o_datasource = (*jvm_env)->NewObject (jvm_env, c_datasource,
344 m_datasource_constructor);
345 if (o_datasource == NULL)
346 {
347 ERROR ("java plugin: ctoj_data_source: "
348 "Creating a new DataSource instance failed.");
349 return (NULL);
350 }
352 /* Set name via `void setName (String name)' */
353 status = ctoj_string (jvm_env, dsrc->name,
354 c_datasource, o_datasource, "setName");
355 if (status != 0)
356 {
357 ERROR ("java plugin: ctoj_data_source: "
358 "ctoj_string (setName) failed.");
359 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
360 return (NULL);
361 }
363 /* Set type via `void setType (int type)' */
364 status = ctoj_int (jvm_env, dsrc->type,
365 c_datasource, o_datasource, "setType");
366 if (status != 0)
367 {
368 ERROR ("java plugin: ctoj_data_source: "
369 "ctoj_int (setType) failed.");
370 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
371 return (NULL);
372 }
374 /* Set min via `void setMin (double min)' */
375 status = ctoj_double (jvm_env, dsrc->min,
376 c_datasource, o_datasource, "setMin");
377 if (status != 0)
378 {
379 ERROR ("java plugin: ctoj_data_source: "
380 "ctoj_double (setMin) failed.");
381 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
382 return (NULL);
383 }
385 /* Set max via `void setMax (double max)' */
386 status = ctoj_double (jvm_env, dsrc->max,
387 c_datasource, o_datasource, "setMax");
388 if (status != 0)
389 {
390 ERROR ("java plugin: ctoj_data_source: "
391 "ctoj_double (setMax) failed.");
392 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
393 return (NULL);
394 }
396 return (o_datasource);
397 } /* }}} jobject ctoj_data_source */
399 /* Convert a oconfig_value_t to a org/collectd/api/OConfigValue */
400 static jobject ctoj_oconfig_value (JNIEnv *jvm_env, /* {{{ */
401 oconfig_value_t ocvalue)
402 {
403 jclass c_ocvalue;
404 jmethodID m_ocvalue_constructor;
405 jobject o_argument;
406 jobject o_ocvalue;
408 m_ocvalue_constructor = NULL;
409 o_argument = NULL;
411 c_ocvalue = (*jvm_env)->FindClass (jvm_env,
412 "org/collectd/api/OConfigValue");
413 if (c_ocvalue == NULL)
414 {
415 ERROR ("java plugin: ctoj_oconfig_value: "
416 "FindClass (org/collectd/api/OConfigValue) failed.");
417 return (NULL);
418 }
420 if (ocvalue.type == OCONFIG_TYPE_BOOLEAN)
421 {
422 jboolean tmp_boolean;
424 tmp_boolean = (ocvalue.value.boolean == 0) ? JNI_FALSE : JNI_TRUE;
426 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
427 "<init>", "(Z)V");
428 if (m_ocvalue_constructor == NULL)
429 {
430 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
431 "`OConfigValue (boolean)' constructor.");
432 return (NULL);
433 }
435 return ((*jvm_env)->NewObject (jvm_env,
436 c_ocvalue, m_ocvalue_constructor, tmp_boolean));
437 } /* if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) */
438 else if (ocvalue.type == OCONFIG_TYPE_STRING)
439 {
440 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
441 "<init>", "(Ljava/lang/String;)V");
442 if (m_ocvalue_constructor == NULL)
443 {
444 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
445 "`OConfigValue (String)' constructor.");
446 return (NULL);
447 }
449 o_argument = (*jvm_env)->NewStringUTF (jvm_env, ocvalue.value.string);
450 if (o_argument == NULL)
451 {
452 ERROR ("java plugin: ctoj_oconfig_value: "
453 "Creating a String object failed.");
454 return (NULL);
455 }
456 }
457 else if (ocvalue.type == OCONFIG_TYPE_NUMBER)
458 {
459 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
460 "<init>", "(Ljava/lang/Number;)V");
461 if (m_ocvalue_constructor == NULL)
462 {
463 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
464 "`OConfigValue (Number)' constructor.");
465 return (NULL);
466 }
468 o_argument = ctoj_jdouble_to_number (jvm_env,
469 (jdouble) ocvalue.value.number);
470 if (o_argument == NULL)
471 {
472 ERROR ("java plugin: ctoj_oconfig_value: "
473 "Creating a Number object failed.");
474 return (NULL);
475 }
476 }
477 else
478 {
479 return (NULL);
480 }
482 assert (m_ocvalue_constructor != NULL);
483 assert (o_argument != NULL);
485 o_ocvalue = (*jvm_env)->NewObject (jvm_env,
486 c_ocvalue, m_ocvalue_constructor, o_argument);
487 if (o_ocvalue == NULL)
488 {
489 ERROR ("java plugin: ctoj_oconfig_value: "
490 "Creating an OConfigValue object failed.");
491 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
492 return (NULL);
493 }
495 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
496 return (o_ocvalue);
497 } /* }}} jobject ctoj_oconfig_value */
499 /* Convert a oconfig_item_t to a org/collectd/api/OConfigItem */
500 static jobject ctoj_oconfig_item (JNIEnv *jvm_env, /* {{{ */
501 const oconfig_item_t *ci)
502 {
503 jclass c_ocitem;
504 jmethodID m_ocitem_constructor;
505 jmethodID m_addvalue;
506 jmethodID m_addchild;
507 jobject o_key;
508 jobject o_ocitem;
509 int i;
511 c_ocitem = (*jvm_env)->FindClass (jvm_env, "org/collectd/api/OConfigItem");
512 if (c_ocitem == NULL)
513 {
514 ERROR ("java plugin: ctoj_oconfig_item: "
515 "FindClass (org/collectd/api/OConfigItem) failed.");
516 return (NULL);
517 }
519 /* Get the required methods: m_ocitem_constructor, m_addvalue, and m_addchild
520 * {{{ */
521 m_ocitem_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
522 "<init>", "(Ljava/lang/String;)V");
523 if (m_ocitem_constructor == NULL)
524 {
525 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
526 "`OConfigItem (String)' constructor.");
527 return (NULL);
528 }
530 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
531 "addValue", "(Lorg/collectd/api/OConfigValue;)V");
532 if (m_addvalue == NULL)
533 {
534 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
535 "`addValue (OConfigValue)' method.");
536 return (NULL);
537 }
539 m_addchild = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
540 "addChild", "(Lorg/collectd/api/OConfigItem;)V");
541 if (m_addchild == NULL)
542 {
543 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
544 "`addChild (OConfigItem)' method.");
545 return (NULL);
546 }
547 /* }}} */
549 /* Create a String object with the key.
550 * Needed for calling the constructor. */
551 o_key = (*jvm_env)->NewStringUTF (jvm_env, ci->key);
552 if (o_key == NULL)
553 {
554 ERROR ("java plugin: ctoj_oconfig_item: "
555 "Creating String object failed.");
556 return (NULL);
557 }
559 /* Create an OConfigItem object */
560 o_ocitem = (*jvm_env)->NewObject (jvm_env,
561 c_ocitem, m_ocitem_constructor, o_key);
562 if (o_ocitem == NULL)
563 {
564 ERROR ("java plugin: ctoj_oconfig_item: "
565 "Creating an OConfigItem object failed.");
566 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
567 return (NULL);
568 }
570 /* We don't need the String object any longer.. */
571 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
573 /* Call OConfigItem.addValue for each value */
574 for (i = 0; i < ci->values_num; i++) /* {{{ */
575 {
576 jobject o_value;
578 o_value = ctoj_oconfig_value (jvm_env, ci->values[i]);
579 if (o_value == NULL)
580 {
581 ERROR ("java plugin: ctoj_oconfig_item: "
582 "Creating an OConfigValue object failed.");
583 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
584 return (NULL);
585 }
587 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_value);
588 (*jvm_env)->DeleteLocalRef (jvm_env, o_value);
589 } /* }}} for (i = 0; i < ci->values_num; i++) */
591 /* Call OConfigItem.addChild for each child */
592 for (i = 0; i < ci->children_num; i++) /* {{{ */
593 {
594 jobject o_child;
596 o_child = ctoj_oconfig_item (jvm_env, ci->children + i);
597 if (o_child == NULL)
598 {
599 ERROR ("java plugin: ctoj_oconfig_item: "
600 "Creating an OConfigItem object failed.");
601 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
602 return (NULL);
603 }
605 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addchild, o_child);
606 (*jvm_env)->DeleteLocalRef (jvm_env, o_child);
607 } /* }}} for (i = 0; i < ci->children_num; i++) */
609 return (o_ocitem);
610 } /* }}} jobject ctoj_oconfig_item */
612 /* Convert a data_set_t to a org/collectd/api/DataSet */
613 static jobject ctoj_data_set (JNIEnv *jvm_env, const data_set_t *ds) /* {{{ */
614 {
615 jclass c_dataset;
616 jmethodID m_constructor;
617 jmethodID m_add;
618 jobject o_type;
619 jobject o_dataset;
620 size_t i;
622 /* Look up the org/collectd/api/DataSet class */
623 c_dataset = (*jvm_env)->FindClass (jvm_env, "org/collectd/api/DataSet");
624 if (c_dataset == NULL)
625 {
626 ERROR ("java plugin: ctoj_data_set: Looking up the "
627 "org/collectd/api/DataSet class failed.");
628 return (NULL);
629 }
631 /* Search for the `DataSet (String type)' constructor. */
632 m_constructor = (*jvm_env)->GetMethodID (jvm_env,
633 c_dataset, "<init>", "(Ljava/lang/String;)V");
634 if (m_constructor == NULL)
635 {
636 ERROR ("java plugin: ctoj_data_set: Looking up the "
637 "`DataSet (String)' constructor failed.");
638 return (NULL);
639 }
641 /* Search for the `void addDataSource (DataSource)' method. */
642 m_add = (*jvm_env)->GetMethodID (jvm_env,
643 c_dataset, "addDataSource", "(Lorg/collectd/api/DataSource;)V");
644 if (m_add == NULL)
645 {
646 ERROR ("java plugin: ctoj_data_set: Looking up the "
647 "`addDataSource (DataSource)' method failed.");
648 return (NULL);
649 }
651 o_type = (*jvm_env)->NewStringUTF (jvm_env, ds->type);
652 if (o_type == NULL)
653 {
654 ERROR ("java plugin: ctoj_data_set: Creating a String object failed.");
655 return (NULL);
656 }
658 o_dataset = (*jvm_env)->NewObject (jvm_env,
659 c_dataset, m_constructor, o_type);
660 if (o_dataset == NULL)
661 {
662 ERROR ("java plugin: ctoj_data_set: Creating a DataSet object failed.");
663 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
664 return (NULL);
665 }
667 /* Decrease reference counter on the java.lang.String object. */
668 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
670 for (i = 0; i < ds->ds_num; i++)
671 {
672 jobject o_datasource;
674 o_datasource = ctoj_data_source (jvm_env, ds->ds + i);
675 if (o_datasource == NULL)
676 {
677 ERROR ("java plugin: ctoj_data_set: ctoj_data_source (%s.%s) failed",
678 ds->type, ds->ds[i].name);
679 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
680 return (NULL);
681 }
683 (*jvm_env)->CallVoidMethod (jvm_env, o_dataset, m_add, o_datasource);
685 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
686 } /* for (i = 0; i < ds->ds_num; i++) */
688 return (o_dataset);
689 } /* }}} jobject ctoj_data_set */
691 static int ctoj_value_list_add_value (JNIEnv *jvm_env, /* {{{ */
692 value_t value, int ds_type,
693 jclass class_ptr, jobject object_ptr)
694 {
695 jmethodID m_addvalue;
696 jobject o_number;
698 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
699 "addValue", "(Ljava/lang/Number;)V");
700 if (m_addvalue == NULL)
701 {
702 ERROR ("java plugin: ctoj_value_list_add_value: "
703 "Cannot find method `void addValue (Number)'.");
704 return (-1);
705 }
707 o_number = ctoj_value_to_number (jvm_env, value, ds_type);
708 if (o_number == NULL)
709 {
710 ERROR ("java plugin: ctoj_value_list_add_value: "
711 "ctoj_value_to_number failed.");
712 return (-1);
713 }
715 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_addvalue, o_number);
717 (*jvm_env)->DeleteLocalRef (jvm_env, o_number);
719 return (0);
720 } /* }}} int ctoj_value_list_add_value */
722 static int ctoj_value_list_add_data_set (JNIEnv *jvm_env, /* {{{ */
723 jclass c_valuelist, jobject o_valuelist, const data_set_t *ds)
724 {
725 jmethodID m_setdataset;
726 jobject o_dataset;
728 /* Look for the `void setDataSource (List<DataSource> ds)' method. */
729 m_setdataset = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
730 "setDataSet", "(Lorg/collectd/api/DataSet;)V");
731 if (m_setdataset == NULL)
732 {
733 ERROR ("java plugin: ctoj_value_list_add_data_set: "
734 "Cannot find the `void setDataSet (DataSet)' method.");
735 return (-1);
736 }
738 /* Create a DataSet object. */
739 o_dataset = ctoj_data_set (jvm_env, ds);
740 if (o_dataset == NULL)
741 {
742 ERROR ("java plugin: ctoj_value_list_add_data_set: "
743 "ctoj_data_set (%s) failed.", ds->type);
744 return (-1);
745 }
747 /* Actually call the method. */
748 (*jvm_env)->CallVoidMethod (jvm_env,
749 o_valuelist, m_setdataset, o_dataset);
751 /* Decrease reference counter on the List<DataSource> object. */
752 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
754 return (0);
755 } /* }}} int ctoj_value_list_add_data_set */
757 /* Convert a value_list_t (and data_set_t) to a org/collectd/api/ValueList */
758 static jobject ctoj_value_list (JNIEnv *jvm_env, /* {{{ */
759 const data_set_t *ds, const value_list_t *vl)
760 {
761 jclass c_valuelist;
762 jmethodID m_valuelist_constructor;
763 jobject o_valuelist;
764 int status;
765 size_t i;
767 /* First, create a new ValueList instance..
768 * Look up the class.. */
769 c_valuelist = (*jvm_env)->FindClass (jvm_env,
770 "org/collectd/api/ValueList");
771 if (c_valuelist == NULL)
772 {
773 ERROR ("java plugin: ctoj_value_list: "
774 "FindClass (org/collectd/api/ValueList) failed.");
775 return (NULL);
776 }
778 /* Lookup the `ValueList ()' constructor. */
779 m_valuelist_constructor = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
780 "<init>", "()V");
781 if (m_valuelist_constructor == NULL)
782 {
783 ERROR ("java plugin: ctoj_value_list: Cannot find the "
784 "`ValueList ()' constructor.");
785 return (NULL);
786 }
788 /* Create a new instance. */
789 o_valuelist = (*jvm_env)->NewObject (jvm_env, c_valuelist,
790 m_valuelist_constructor);
791 if (o_valuelist == NULL)
792 {
793 ERROR ("java plugin: ctoj_value_list: Creating a new ValueList instance "
794 "failed.");
795 return (NULL);
796 }
798 status = ctoj_value_list_add_data_set (jvm_env,
799 c_valuelist, o_valuelist, ds);
800 if (status != 0)
801 {
802 ERROR ("java plugin: ctoj_value_list: "
803 "ctoj_value_list_add_data_set failed.");
804 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
805 return (NULL);
806 }
808 /* Set the strings.. */
809 #define SET_STRING(str,method_name) do { \
810 status = ctoj_string (jvm_env, str, \
811 c_valuelist, o_valuelist, method_name); \
812 if (status != 0) { \
813 ERROR ("java plugin: ctoj_value_list: ctoj_string (%s) failed.", \
814 method_name); \
815 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist); \
816 return (NULL); \
817 } } while (0)
819 SET_STRING (vl->host, "setHost");
820 SET_STRING (vl->plugin, "setPlugin");
821 SET_STRING (vl->plugin_instance, "setPluginInstance");
822 SET_STRING (vl->type, "setType");
823 SET_STRING (vl->type_instance, "setTypeInstance");
825 #undef SET_STRING
827 /* Set the `time' member. Java stores time in milliseconds. */
828 status = ctoj_long (jvm_env, (jlong) CDTIME_T_TO_MS (vl->time),
829 c_valuelist, o_valuelist, "setTime");
830 if (status != 0)
831 {
832 ERROR ("java plugin: ctoj_value_list: ctoj_long (setTime) failed.");
833 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
834 return (NULL);
835 }
837 /* Set the `interval' member.. */
838 status = ctoj_long (jvm_env,
839 (jlong) CDTIME_T_TO_MS (vl->interval),
840 c_valuelist, o_valuelist, "setInterval");
841 if (status != 0)
842 {
843 ERROR ("java plugin: ctoj_value_list: ctoj_long (setInterval) failed.");
844 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
845 return (NULL);
846 }
848 for (i = 0; i < vl->values_len; i++)
849 {
850 status = ctoj_value_list_add_value (jvm_env, vl->values[i], ds->ds[i].type,
851 c_valuelist, o_valuelist);
852 if (status != 0)
853 {
854 ERROR ("java plugin: ctoj_value_list: "
855 "ctoj_value_list_add_value failed.");
856 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
857 return (NULL);
858 }
859 }
861 return (o_valuelist);
862 } /* }}} jobject ctoj_value_list */
864 /* Convert a notification_t to a org/collectd/api/Notification */
865 static jobject ctoj_notification (JNIEnv *jvm_env, /* {{{ */
866 const notification_t *n)
867 {
868 jclass c_notification;
869 jmethodID m_constructor;
870 jobject o_notification;
871 int status;
873 /* First, create a new Notification instance..
874 * Look up the class.. */
875 c_notification = (*jvm_env)->FindClass (jvm_env,
876 "org/collectd/api/Notification");
877 if (c_notification == NULL)
878 {
879 ERROR ("java plugin: ctoj_notification: "
880 "FindClass (org/collectd/api/Notification) failed.");
881 return (NULL);
882 }
884 /* Lookup the `Notification ()' constructor. */
885 m_constructor = (*jvm_env)->GetMethodID (jvm_env, c_notification,
886 "<init>", "()V");
887 if (m_constructor == NULL)
888 {
889 ERROR ("java plugin: ctoj_notification: Cannot find the "
890 "`Notification ()' constructor.");
891 return (NULL);
892 }
894 /* Create a new instance. */
895 o_notification = (*jvm_env)->NewObject (jvm_env, c_notification,
896 m_constructor);
897 if (o_notification == NULL)
898 {
899 ERROR ("java plugin: ctoj_notification: Creating a new Notification "
900 "instance failed.");
901 return (NULL);
902 }
904 /* Set the strings.. */
905 #define SET_STRING(str,method_name) do { \
906 status = ctoj_string (jvm_env, str, \
907 c_notification, o_notification, method_name); \
908 if (status != 0) { \
909 ERROR ("java plugin: ctoj_notification: ctoj_string (%s) failed.", \
910 method_name); \
911 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification); \
912 return (NULL); \
913 } } while (0)
915 SET_STRING (n->host, "setHost");
916 SET_STRING (n->plugin, "setPlugin");
917 SET_STRING (n->plugin_instance, "setPluginInstance");
918 SET_STRING (n->type, "setType");
919 SET_STRING (n->type_instance, "setTypeInstance");
920 SET_STRING (n->message, "setMessage");
922 #undef SET_STRING
924 /* Set the `time' member. Java stores time in milliseconds. */
925 status = ctoj_long (jvm_env, (jlong) CDTIME_T_TO_MS (n->time),
926 c_notification, o_notification, "setTime");
927 if (status != 0)
928 {
929 ERROR ("java plugin: ctoj_notification: ctoj_long (setTime) failed.");
930 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
931 return (NULL);
932 }
934 /* Set the `severity' member.. */
935 status = ctoj_int (jvm_env, (jint) n->severity,
936 c_notification, o_notification, "setSeverity");
937 if (status != 0)
938 {
939 ERROR ("java plugin: ctoj_notification: ctoj_int (setSeverity) failed.");
940 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
941 return (NULL);
942 }
944 return (o_notification);
945 } /* }}} jobject ctoj_notification */
947 /*
948 * Java to C conversion functions
949 */
950 /* Call a `String <method> ()' method. */
951 static int jtoc_string (JNIEnv *jvm_env, /* {{{ */
952 char *buffer, size_t buffer_size, int empty_okay,
953 jclass class_ptr, jobject object_ptr, const char *method_name)
954 {
955 jmethodID method_id;
956 jobject string_obj;
957 const char *c_str;
959 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
960 method_name, "()Ljava/lang/String;");
961 if (method_id == NULL)
962 {
963 ERROR ("java plugin: jtoc_string: Cannot find method `String %s ()'.",
964 method_name);
965 return (-1);
966 }
968 string_obj = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, method_id);
969 if ((string_obj == NULL) && (empty_okay == 0))
970 {
971 ERROR ("java plugin: jtoc_string: CallObjectMethod (%s) failed.",
972 method_name);
973 return (-1);
974 }
975 else if ((string_obj == NULL) && (empty_okay != 0))
976 {
977 memset (buffer, 0, buffer_size);
978 return (0);
979 }
981 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, string_obj, 0);
982 if (c_str == NULL)
983 {
984 ERROR ("java plugin: jtoc_string: GetStringUTFChars failed.");
985 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
986 return (-1);
987 }
989 sstrncpy (buffer, c_str, buffer_size);
991 (*jvm_env)->ReleaseStringUTFChars (jvm_env, string_obj, c_str);
992 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
994 return (0);
995 } /* }}} int jtoc_string */
997 /* Call an `int <method> ()' method. */
998 static int jtoc_int (JNIEnv *jvm_env, /* {{{ */
999 jint *ret_value,
1000 jclass class_ptr, jobject object_ptr, const char *method_name)
1001 {
1002 jmethodID method_id;
1004 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1005 method_name, "()I");
1006 if (method_id == NULL)
1007 {
1008 ERROR ("java plugin: jtoc_int: Cannot find method `int %s ()'.",
1009 method_name);
1010 return (-1);
1011 }
1013 *ret_value = (*jvm_env)->CallIntMethod (jvm_env, object_ptr, method_id);
1015 return (0);
1016 } /* }}} int jtoc_int */
1018 /* Call a `long <method> ()' method. */
1019 static int jtoc_long (JNIEnv *jvm_env, /* {{{ */
1020 jlong *ret_value,
1021 jclass class_ptr, jobject object_ptr, const char *method_name)
1022 {
1023 jmethodID method_id;
1025 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1026 method_name, "()J");
1027 if (method_id == NULL)
1028 {
1029 ERROR ("java plugin: jtoc_long: Cannot find method `long %s ()'.",
1030 method_name);
1031 return (-1);
1032 }
1034 *ret_value = (*jvm_env)->CallLongMethod (jvm_env, object_ptr, method_id);
1036 return (0);
1037 } /* }}} int jtoc_long */
1039 /* Call a `double <method> ()' method. */
1040 static int jtoc_double (JNIEnv *jvm_env, /* {{{ */
1041 jdouble *ret_value,
1042 jclass class_ptr, jobject object_ptr, const char *method_name)
1043 {
1044 jmethodID method_id;
1046 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1047 method_name, "()D");
1048 if (method_id == NULL)
1049 {
1050 ERROR ("java plugin: jtoc_double: Cannot find method `double %s ()'.",
1051 method_name);
1052 return (-1);
1053 }
1055 *ret_value = (*jvm_env)->CallDoubleMethod (jvm_env, object_ptr, method_id);
1057 return (0);
1058 } /* }}} int jtoc_double */
1060 static int jtoc_value (JNIEnv *jvm_env, /* {{{ */
1061 value_t *ret_value, int ds_type, jobject object_ptr)
1062 {
1063 jclass class_ptr;
1064 int status;
1066 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1068 if (ds_type == DS_TYPE_GAUGE)
1069 {
1070 jdouble tmp_double;
1072 status = jtoc_double (jvm_env, &tmp_double,
1073 class_ptr, object_ptr, "doubleValue");
1074 if (status != 0)
1075 {
1076 ERROR ("java plugin: jtoc_value: "
1077 "jtoc_double failed.");
1078 return (-1);
1079 }
1080 (*ret_value).gauge = (gauge_t) tmp_double;
1081 }
1082 else
1083 {
1084 jlong tmp_long;
1086 status = jtoc_long (jvm_env, &tmp_long,
1087 class_ptr, object_ptr, "longValue");
1088 if (status != 0)
1089 {
1090 ERROR ("java plugin: jtoc_value: "
1091 "jtoc_long failed.");
1092 return (-1);
1093 }
1095 if (ds_type == DS_TYPE_DERIVE)
1096 (*ret_value).derive = (derive_t) tmp_long;
1097 else if (ds_type == DS_TYPE_ABSOLUTE)
1098 (*ret_value).absolute = (absolute_t) tmp_long;
1099 else
1100 (*ret_value).counter = (counter_t) tmp_long;
1101 }
1103 return (0);
1104 } /* }}} int jtoc_value */
1106 /* Read a List<Number>, convert it to `value_t' and add it to the given
1107 * `value_list_t'. */
1108 static int jtoc_values_array (JNIEnv *jvm_env, /* {{{ */
1109 const data_set_t *ds, value_list_t *vl,
1110 jclass class_ptr, jobject object_ptr)
1111 {
1112 jmethodID m_getvalues;
1113 jmethodID m_toarray;
1114 jobject o_list;
1115 jobjectArray o_number_array;
1117 value_t *values;
1118 int values_num;
1119 int i;
1121 values_num = ds->ds_num;
1123 values = NULL;
1124 o_number_array = NULL;
1125 o_list = NULL;
1127 #define BAIL_OUT(status) \
1128 free (values); \
1129 if (o_number_array != NULL) \
1130 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array); \
1131 if (o_list != NULL) \
1132 (*jvm_env)->DeleteLocalRef (jvm_env, o_list); \
1133 return (status);
1135 /* Call: List<Number> ValueList.getValues () */
1136 m_getvalues = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1137 "getValues", "()Ljava/util/List;");
1138 if (m_getvalues == NULL)
1139 {
1140 ERROR ("java plugin: jtoc_values_array: "
1141 "Cannot find method `List getValues ()'.");
1142 BAIL_OUT (-1);
1143 }
1145 o_list = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, m_getvalues);
1146 if (o_list == NULL)
1147 {
1148 ERROR ("java plugin: jtoc_values_array: "
1149 "CallObjectMethod (getValues) failed.");
1150 BAIL_OUT (-1);
1151 }
1153 /* Call: Number[] List.toArray () */
1154 m_toarray = (*jvm_env)->GetMethodID (jvm_env,
1155 (*jvm_env)->GetObjectClass (jvm_env, o_list),
1156 "toArray", "()[Ljava/lang/Object;");
1157 if (m_toarray == NULL)
1158 {
1159 ERROR ("java plugin: jtoc_values_array: "
1160 "Cannot find method `Object[] toArray ()'.");
1161 BAIL_OUT (-1);
1162 }
1164 o_number_array = (*jvm_env)->CallObjectMethod (jvm_env, o_list, m_toarray);
1165 if (o_number_array == NULL)
1166 {
1167 ERROR ("java plugin: jtoc_values_array: "
1168 "CallObjectMethod (toArray) failed.");
1169 BAIL_OUT (-1);
1170 }
1172 values = (value_t *) calloc (values_num, sizeof (value_t));
1173 if (values == NULL)
1174 {
1175 ERROR ("java plugin: jtoc_values_array: calloc failed.");
1176 BAIL_OUT (-1);
1177 }
1179 for (i = 0; i < values_num; i++)
1180 {
1181 jobject o_number;
1182 int status;
1184 o_number = (*jvm_env)->GetObjectArrayElement (jvm_env,
1185 o_number_array, (jsize) i);
1186 if (o_number == NULL)
1187 {
1188 ERROR ("java plugin: jtoc_values_array: "
1189 "GetObjectArrayElement (%i) failed.", i);
1190 BAIL_OUT (-1);
1191 }
1193 status = jtoc_value (jvm_env, values + i, ds->ds[i].type, o_number);
1194 if (status != 0)
1195 {
1196 ERROR ("java plugin: jtoc_values_array: "
1197 "jtoc_value (%i) failed.", i);
1198 BAIL_OUT (-1);
1199 }
1200 } /* for (i = 0; i < values_num; i++) */
1202 vl->values = values;
1203 vl->values_len = values_num;
1205 #undef BAIL_OUT
1206 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array);
1207 (*jvm_env)->DeleteLocalRef (jvm_env, o_list);
1208 return (0);
1209 } /* }}} int jtoc_values_array */
1211 /* Convert a org/collectd/api/ValueList to a value_list_t. */
1212 static int jtoc_value_list (JNIEnv *jvm_env, value_list_t *vl, /* {{{ */
1213 jobject object_ptr)
1214 {
1215 jclass class_ptr;
1216 int status;
1217 jlong tmp_long;
1218 const data_set_t *ds;
1220 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1221 if (class_ptr == NULL)
1222 {
1223 ERROR ("java plugin: jtoc_value_list: GetObjectClass failed.");
1224 return (-1);
1225 }
1227 /* eo == empty okay */
1228 #define SET_STRING(buffer,method, eo) do { \
1229 status = jtoc_string (jvm_env, buffer, sizeof (buffer), eo, \
1230 class_ptr, object_ptr, method); \
1231 if (status != 0) { \
1232 ERROR ("java plugin: jtoc_value_list: jtoc_string (%s) failed.", \
1233 method); \
1234 return (-1); \
1235 } } while (0)
1237 SET_STRING(vl->type, "getType", /* empty = */ 0);
1239 ds = plugin_get_ds (vl->type);
1240 if (ds == NULL)
1241 {
1242 ERROR ("java plugin: jtoc_value_list: Data-set `%s' is not defined. "
1243 "Please consult the types.db(5) manpage for mor information.",
1244 vl->type);
1245 return (-1);
1246 }
1248 SET_STRING(vl->host, "getHost", /* empty = */ 0);
1249 SET_STRING(vl->plugin, "getPlugin", /* empty = */ 0);
1250 SET_STRING(vl->plugin_instance, "getPluginInstance", /* empty = */ 1);
1251 SET_STRING(vl->type_instance, "getTypeInstance", /* empty = */ 1);
1253 #undef SET_STRING
1255 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1256 if (status != 0)
1257 {
1258 ERROR ("java plugin: jtoc_value_list: jtoc_long (getTime) failed.");
1259 return (-1);
1260 }
1261 /* Java measures time in milliseconds. */
1262 vl->time = MS_TO_CDTIME_T (tmp_long);
1264 status = jtoc_long (jvm_env, &tmp_long,
1265 class_ptr, object_ptr, "getInterval");
1266 if (status != 0)
1267 {
1268 ERROR ("java plugin: jtoc_value_list: jtoc_long (getInterval) failed.");
1269 return (-1);
1270 }
1271 vl->interval = MS_TO_CDTIME_T (tmp_long);
1273 status = jtoc_values_array (jvm_env, ds, vl, class_ptr, object_ptr);
1274 if (status != 0)
1275 {
1276 ERROR ("java plugin: jtoc_value_list: jtoc_values_array failed.");
1277 return (-1);
1278 }
1280 return (0);
1281 } /* }}} int jtoc_value_list */
1283 /* Convert a org/collectd/api/Notification to a notification_t. */
1284 static int jtoc_notification (JNIEnv *jvm_env, notification_t *n, /* {{{ */
1285 jobject object_ptr)
1286 {
1287 jclass class_ptr;
1288 int status;
1289 jlong tmp_long;
1290 jint tmp_int;
1292 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1293 if (class_ptr == NULL)
1294 {
1295 ERROR ("java plugin: jtoc_notification: GetObjectClass failed.");
1296 return (-1);
1297 }
1299 /* eo == empty okay */
1300 #define SET_STRING(buffer,method, eo) do { \
1301 status = jtoc_string (jvm_env, buffer, sizeof (buffer), eo, \
1302 class_ptr, object_ptr, method); \
1303 if (status != 0) { \
1304 ERROR ("java plugin: jtoc_notification: jtoc_string (%s) failed.", \
1305 method); \
1306 return (-1); \
1307 } } while (0)
1309 SET_STRING (n->host, "getHost", /* empty = */ 1);
1310 SET_STRING (n->plugin, "getPlugin", /* empty = */ 1);
1311 SET_STRING (n->plugin_instance, "getPluginInstance", /* empty = */ 1);
1312 SET_STRING (n->type, "getType", /* empty = */ 1);
1313 SET_STRING (n->type_instance, "getTypeInstance", /* empty = */ 1);
1314 SET_STRING (n->message, "getMessage", /* empty = */ 0);
1316 #undef SET_STRING
1318 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1319 if (status != 0)
1320 {
1321 ERROR ("java plugin: jtoc_notification: jtoc_long (getTime) failed.");
1322 return (-1);
1323 }
1324 /* Java measures time in milliseconds. */
1325 n->time = MS_TO_CDTIME_T(tmp_long);
1327 status = jtoc_int (jvm_env, &tmp_int,
1328 class_ptr, object_ptr, "getSeverity");
1329 if (status != 0)
1330 {
1331 ERROR ("java plugin: jtoc_notification: jtoc_int (getSeverity) failed.");
1332 return (-1);
1333 }
1334 n->severity = (int) tmp_int;
1336 return (0);
1337 } /* }}} int jtoc_notification */
1338 /*
1339 * Functions accessible from Java
1340 */
1341 static jint JNICALL cjni_api_dispatch_values (JNIEnv *jvm_env, /* {{{ */
1342 jobject this, jobject java_vl)
1343 {
1344 value_list_t vl = VALUE_LIST_INIT;
1345 int status;
1347 DEBUG ("cjni_api_dispatch_values: java_vl = %p;", (void *) java_vl);
1349 status = jtoc_value_list (jvm_env, &vl, java_vl);
1350 if (status != 0)
1351 {
1352 ERROR ("java plugin: cjni_api_dispatch_values: jtoc_value_list failed.");
1353 return (-1);
1354 }
1356 status = plugin_dispatch_values (&vl);
1358 sfree (vl.values);
1360 return (status);
1361 } /* }}} jint cjni_api_dispatch_values */
1363 static jint JNICALL cjni_api_dispatch_notification (JNIEnv *jvm_env, /* {{{ */
1364 jobject this, jobject o_notification)
1365 {
1366 notification_t n = { 0 };
1367 int status;
1369 status = jtoc_notification (jvm_env, &n, o_notification);
1370 if (status != 0)
1371 {
1372 ERROR ("java plugin: cjni_api_dispatch_notification: jtoc_notification failed.");
1373 return (-1);
1374 }
1376 status = plugin_dispatch_notification (&n);
1378 return (status);
1379 } /* }}} jint cjni_api_dispatch_notification */
1381 static jobject JNICALL cjni_api_get_ds (JNIEnv *jvm_env, /* {{{ */
1382 jobject this, jobject o_string_type)
1383 {
1384 const char *ds_name;
1385 const data_set_t *ds;
1386 jobject o_dataset;
1388 ds_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_string_type, 0);
1389 if (ds_name == NULL)
1390 {
1391 ERROR ("java plugin: cjni_api_get_ds: GetStringUTFChars failed.");
1392 return (NULL);
1393 }
1395 ds = plugin_get_ds (ds_name);
1396 DEBUG ("java plugin: cjni_api_get_ds: "
1397 "plugin_get_ds (%s) = %p;", ds_name, (void *) ds);
1399 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_string_type, ds_name);
1401 if (ds == NULL)
1402 return (NULL);
1404 o_dataset = ctoj_data_set (jvm_env, ds);
1405 return (o_dataset);
1406 } /* }}} jint cjni_api_get_ds */
1408 static jint JNICALL cjni_api_register_config (JNIEnv *jvm_env, /* {{{ */
1409 jobject this, jobject o_name, jobject o_config)
1410 {
1411 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_CONFIG));
1412 } /* }}} jint cjni_api_register_config */
1414 static jint JNICALL cjni_api_register_init (JNIEnv *jvm_env, /* {{{ */
1415 jobject this, jobject o_name, jobject o_config)
1416 {
1417 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_INIT));
1418 } /* }}} jint cjni_api_register_init */
1420 static jint JNICALL cjni_api_register_read (JNIEnv *jvm_env, /* {{{ */
1421 jobject this, jobject o_name, jobject o_read)
1422 {
1423 user_data_t ud = { 0 };
1424 cjni_callback_info_t *cbi;
1426 cbi = cjni_callback_info_create (jvm_env, o_name, o_read, CB_TYPE_READ);
1427 if (cbi == NULL)
1428 return (-1);
1430 DEBUG ("java plugin: Registering new read callback: %s", cbi->name);
1432 ud.data = (void *) cbi;
1433 ud.free_func = cjni_callback_info_destroy;
1435 plugin_register_complex_read (/* group = */ NULL, cbi->name, cjni_read,
1436 /* interval = */ 0, &ud);
1438 (*jvm_env)->DeleteLocalRef (jvm_env, o_read);
1440 return (0);
1441 } /* }}} jint cjni_api_register_read */
1443 static jint JNICALL cjni_api_register_write (JNIEnv *jvm_env, /* {{{ */
1444 jobject this, jobject o_name, jobject o_write)
1445 {
1446 user_data_t ud = { 0 };
1447 cjni_callback_info_t *cbi;
1449 cbi = cjni_callback_info_create (jvm_env, o_name, o_write, CB_TYPE_WRITE);
1450 if (cbi == NULL)
1451 return (-1);
1453 DEBUG ("java plugin: Registering new write callback: %s", cbi->name);
1455 ud.data = (void *) cbi;
1456 ud.free_func = cjni_callback_info_destroy;
1458 plugin_register_write (cbi->name, cjni_write, &ud);
1460 (*jvm_env)->DeleteLocalRef (jvm_env, o_write);
1462 return (0);
1463 } /* }}} jint cjni_api_register_write */
1465 static jint JNICALL cjni_api_register_flush (JNIEnv *jvm_env, /* {{{ */
1466 jobject this, jobject o_name, jobject o_flush)
1467 {
1468 user_data_t ud = { 0 };
1469 cjni_callback_info_t *cbi;
1471 cbi = cjni_callback_info_create (jvm_env, o_name, o_flush, CB_TYPE_FLUSH);
1472 if (cbi == NULL)
1473 return (-1);
1475 DEBUG ("java plugin: Registering new flush callback: %s", cbi->name);
1477 ud.data = (void *) cbi;
1478 ud.free_func = cjni_callback_info_destroy;
1480 plugin_register_flush (cbi->name, cjni_flush, &ud);
1482 (*jvm_env)->DeleteLocalRef (jvm_env, o_flush);
1484 return (0);
1485 } /* }}} jint cjni_api_register_flush */
1487 static jint JNICALL cjni_api_register_shutdown (JNIEnv *jvm_env, /* {{{ */
1488 jobject this, jobject o_name, jobject o_shutdown)
1489 {
1490 return (cjni_callback_register (jvm_env, o_name, o_shutdown,
1491 CB_TYPE_SHUTDOWN));
1492 } /* }}} jint cjni_api_register_shutdown */
1494 static jint JNICALL cjni_api_register_log (JNIEnv *jvm_env, /* {{{ */
1495 jobject this, jobject o_name, jobject o_log)
1496 {
1497 user_data_t ud = { 0 };
1498 cjni_callback_info_t *cbi;
1500 cbi = cjni_callback_info_create (jvm_env, o_name, o_log, CB_TYPE_LOG);
1501 if (cbi == NULL)
1502 return (-1);
1504 DEBUG ("java plugin: Registering new log callback: %s", cbi->name);
1506 ud.data = (void *) cbi;
1507 ud.free_func = cjni_callback_info_destroy;
1509 plugin_register_log (cbi->name, cjni_log, &ud);
1511 (*jvm_env)->DeleteLocalRef (jvm_env, o_log);
1513 return (0);
1514 } /* }}} jint cjni_api_register_log */
1516 static jint JNICALL cjni_api_register_notification (JNIEnv *jvm_env, /* {{{ */
1517 jobject this, jobject o_name, jobject o_notification)
1518 {
1519 user_data_t ud = { 0 };
1520 cjni_callback_info_t *cbi;
1522 cbi = cjni_callback_info_create (jvm_env, o_name, o_notification,
1523 CB_TYPE_NOTIFICATION);
1524 if (cbi == NULL)
1525 return (-1);
1527 DEBUG ("java plugin: Registering new notification callback: %s", cbi->name);
1529 ud.data = (void *) cbi;
1530 ud.free_func = cjni_callback_info_destroy;
1532 plugin_register_notification (cbi->name, cjni_notification, &ud);
1534 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
1536 return (0);
1537 } /* }}} jint cjni_api_register_notification */
1539 static jint JNICALL cjni_api_register_match_target (JNIEnv *jvm_env, /* {{{ */
1540 jobject this, jobject o_name, jobject o_match, int type)
1541 {
1542 int status;
1543 const char *c_name;
1545 c_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_name, 0);
1546 if (c_name == NULL)
1547 {
1548 ERROR ("java plugin: cjni_api_register_match_target: "
1549 "GetStringUTFChars failed.");
1550 return (-1);
1551 }
1553 status = cjni_callback_register (jvm_env, o_name, o_match, type);
1554 if (status != 0)
1555 {
1556 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1557 return (-1);
1558 }
1560 if (type == CB_TYPE_MATCH)
1561 {
1562 match_proc_t m_proc = { 0 };
1564 m_proc.create = cjni_match_target_create;
1565 m_proc.destroy = cjni_match_target_destroy;
1566 m_proc.match = (void *) cjni_match_target_invoke;
1568 status = fc_register_match (c_name, m_proc);
1569 }
1570 else if (type == CB_TYPE_TARGET)
1571 {
1572 target_proc_t t_proc = { 0 };
1574 t_proc.create = cjni_match_target_create;
1575 t_proc.destroy = cjni_match_target_destroy;
1576 t_proc.invoke = cjni_match_target_invoke;
1578 status = fc_register_target (c_name, t_proc);
1579 }
1580 else
1581 {
1582 ERROR ("java plugin: cjni_api_register_match_target: "
1583 "Don't know whether to create a match or a target.");
1584 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1585 return (-1);
1586 }
1588 if (status != 0)
1589 {
1590 ERROR ("java plugin: cjni_api_register_match_target: "
1591 "%s failed.",
1592 (type == CB_TYPE_MATCH) ? "fc_register_match" : "fc_register_target");
1593 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1594 return (-1);
1595 }
1597 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1599 return (0);
1600 } /* }}} jint cjni_api_register_match_target */
1602 static jint JNICALL cjni_api_register_match (JNIEnv *jvm_env, /* {{{ */
1603 jobject this, jobject o_name, jobject o_match)
1604 {
1605 return (cjni_api_register_match_target (jvm_env, this, o_name, o_match,
1606 CB_TYPE_MATCH));
1607 } /* }}} jint cjni_api_register_match */
1609 static jint JNICALL cjni_api_register_target (JNIEnv *jvm_env, /* {{{ */
1610 jobject this, jobject o_name, jobject o_target)
1611 {
1612 return (cjni_api_register_match_target (jvm_env, this, o_name, o_target,
1613 CB_TYPE_TARGET));
1614 } /* }}} jint cjni_api_register_target */
1616 static void JNICALL cjni_api_log (JNIEnv *jvm_env, /* {{{ */
1617 jobject this, jint severity, jobject o_message)
1618 {
1619 const char *c_str;
1621 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, o_message, 0);
1622 if (c_str == NULL)
1623 {
1624 ERROR ("java plugin: cjni_api_log: GetStringUTFChars failed.");
1625 return;
1626 }
1628 if (severity < LOG_ERR)
1629 severity = LOG_ERR;
1630 if (severity > LOG_DEBUG)
1631 severity = LOG_DEBUG;
1633 plugin_log (severity, "%s", c_str);
1635 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_message, c_str);
1636 } /* }}} void cjni_api_log */
1638 static jstring JNICALL cjni_api_get_hostname (JNIEnv *jvm_env, jobject this)
1639 {
1640 return ctoj_output_string(jvm_env, hostname_g);
1641 }
1643 /* List of ``native'' functions, i. e. C-functions that can be called from
1644 * Java. */
1645 static JNINativeMethod jni_api_functions[] = /* {{{ */
1646 {
1647 { "dispatchValues",
1648 "(Lorg/collectd/api/ValueList;)I",
1649 cjni_api_dispatch_values },
1651 { "dispatchNotification",
1652 "(Lorg/collectd/api/Notification;)I",
1653 cjni_api_dispatch_notification },
1655 { "getDS",
1656 "(Ljava/lang/String;)Lorg/collectd/api/DataSet;",
1657 cjni_api_get_ds },
1659 { "registerConfig",
1660 "(Ljava/lang/String;Lorg/collectd/api/CollectdConfigInterface;)I",
1661 cjni_api_register_config },
1663 { "registerInit",
1664 "(Ljava/lang/String;Lorg/collectd/api/CollectdInitInterface;)I",
1665 cjni_api_register_init },
1667 { "registerRead",
1668 "(Ljava/lang/String;Lorg/collectd/api/CollectdReadInterface;)I",
1669 cjni_api_register_read },
1671 { "registerWrite",
1672 "(Ljava/lang/String;Lorg/collectd/api/CollectdWriteInterface;)I",
1673 cjni_api_register_write },
1675 { "registerFlush",
1676 "(Ljava/lang/String;Lorg/collectd/api/CollectdFlushInterface;)I",
1677 cjni_api_register_flush },
1679 { "registerShutdown",
1680 "(Ljava/lang/String;Lorg/collectd/api/CollectdShutdownInterface;)I",
1681 cjni_api_register_shutdown },
1683 { "registerLog",
1684 "(Ljava/lang/String;Lorg/collectd/api/CollectdLogInterface;)I",
1685 cjni_api_register_log },
1687 { "registerNotification",
1688 "(Ljava/lang/String;Lorg/collectd/api/CollectdNotificationInterface;)I",
1689 cjni_api_register_notification },
1691 { "registerMatch",
1692 "(Ljava/lang/String;Lorg/collectd/api/CollectdMatchFactoryInterface;)I",
1693 cjni_api_register_match },
1695 { "registerTarget",
1696 "(Ljava/lang/String;Lorg/collectd/api/CollectdTargetFactoryInterface;)I",
1697 cjni_api_register_target },
1699 { "log",
1700 "(ILjava/lang/String;)V",
1701 cjni_api_log },
1703 { "getHostname",
1704 "()Ljava/lang/String;",
1705 cjni_api_get_hostname },
1707 };
1708 static size_t jni_api_functions_num = sizeof (jni_api_functions)
1709 / sizeof (jni_api_functions[0]);
1710 /* }}} */
1712 /*
1713 * Functions
1714 */
1715 /* Allocate a `cjni_callback_info_t' given the type and objects necessary for
1716 * all registration functions. */
1717 static cjni_callback_info_t *cjni_callback_info_create (JNIEnv *jvm_env, /* {{{ */
1718 jobject o_name, jobject o_callback, int type)
1719 {
1720 const char *c_name;
1721 cjni_callback_info_t *cbi;
1722 const char *method_name;
1723 const char *method_signature;
1725 switch (type)
1726 {
1727 case CB_TYPE_CONFIG:
1728 method_name = "config";
1729 method_signature = "(Lorg/collectd/api/OConfigItem;)I";
1730 break;
1732 case CB_TYPE_INIT:
1733 method_name = "init";
1734 method_signature = "()I";
1735 break;
1737 case CB_TYPE_READ:
1738 method_name = "read";
1739 method_signature = "()I";
1740 break;
1742 case CB_TYPE_WRITE:
1743 method_name = "write";
1744 method_signature = "(Lorg/collectd/api/ValueList;)I";
1745 break;
1747 case CB_TYPE_FLUSH:
1748 method_name = "flush";
1749 method_signature = "(Ljava/lang/Number;Ljava/lang/String;)I";
1750 break;
1752 case CB_TYPE_SHUTDOWN:
1753 method_name = "shutdown";
1754 method_signature = "()I";
1755 break;
1757 case CB_TYPE_LOG:
1758 method_name = "log";
1759 method_signature = "(ILjava/lang/String;)V";
1760 break;
1762 case CB_TYPE_NOTIFICATION:
1763 method_name = "notification";
1764 method_signature = "(Lorg/collectd/api/Notification;)I";
1765 break;
1767 case CB_TYPE_MATCH:
1768 method_name = "createMatch";
1769 method_signature = "(Lorg/collectd/api/OConfigItem;)"
1770 "Lorg/collectd/api/CollectdMatchInterface;";
1771 break;
1773 case CB_TYPE_TARGET:
1774 method_name = "createTarget";
1775 method_signature = "(Lorg/collectd/api/OConfigItem;)"
1776 "Lorg/collectd/api/CollectdTargetInterface;";
1777 break;
1779 default:
1780 ERROR ("java plugin: cjni_callback_info_create: Unknown type: %#x",
1781 type);
1782 return (NULL);
1783 }
1785 c_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_name, 0);
1786 if (c_name == NULL)
1787 {
1788 ERROR ("java plugin: cjni_callback_info_create: "
1789 "GetStringUTFChars failed.");
1790 return (NULL);
1791 }
1793 cbi = calloc (1, sizeof (*cbi));
1794 if (cbi == NULL)
1795 {
1796 ERROR ("java plugin: cjni_callback_info_create: calloc failed.");
1797 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1798 return (NULL);
1799 }
1800 cbi->type = type;
1802 cbi->name = strdup (c_name);
1803 if (cbi->name == NULL)
1804 {
1805 pthread_mutex_unlock (&java_callbacks_lock);
1806 ERROR ("java plugin: cjni_callback_info_create: strdup failed.");
1807 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1808 sfree (cbi);
1809 return (NULL);
1810 }
1812 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1814 cbi->object = (*jvm_env)->NewGlobalRef (jvm_env, o_callback);
1815 if (cbi->object == NULL)
1816 {
1817 ERROR ("java plugin: cjni_callback_info_create: NewGlobalRef failed.");
1818 sfree (cbi->name);
1819 sfree (cbi);
1820 return (NULL);
1821 }
1823 cbi->class = (*jvm_env)->GetObjectClass (jvm_env, cbi->object);
1824 if (cbi->class == NULL)
1825 {
1826 ERROR ("java plugin: cjni_callback_info_create: GetObjectClass failed.");
1827 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1828 sfree (cbi->name);
1829 sfree (cbi);
1830 return (NULL);
1831 }
1833 cbi->method = (*jvm_env)->GetMethodID (jvm_env, cbi->class,
1834 method_name, method_signature);
1835 if (cbi->method == NULL)
1836 {
1837 ERROR ("java plugin: cjni_callback_info_create: "
1838 "Cannot find the `%s' method with signature `%s'.",
1839 method_name, method_signature);
1840 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1841 sfree (cbi->name);
1842 sfree (cbi);
1843 return (NULL);
1844 }
1846 return (cbi);
1847 } /* }}} cjni_callback_info_t cjni_callback_info_create */
1849 /* Allocate a `cjni_callback_info_t' via `cjni_callback_info_create' and add it
1850 * to the global `java_callbacks' variable. This is used for `config', `init',
1851 * and `shutdown' callbacks. */
1852 static int cjni_callback_register (JNIEnv *jvm_env, /* {{{ */
1853 jobject o_name, jobject o_callback, int type)
1854 {
1855 cjni_callback_info_t *cbi;
1856 cjni_callback_info_t *tmp;
1857 #if COLLECT_DEBUG
1858 const char *type_str;
1859 #endif
1861 cbi = cjni_callback_info_create (jvm_env, o_name, o_callback, type);
1862 if (cbi == NULL)
1863 return (-1);
1865 #if COLLECT_DEBUG
1866 switch (type)
1867 {
1868 case CB_TYPE_CONFIG:
1869 type_str = "config";
1870 break;
1872 case CB_TYPE_INIT:
1873 type_str = "init";
1874 break;
1876 case CB_TYPE_SHUTDOWN:
1877 type_str = "shutdown";
1878 break;
1880 case CB_TYPE_MATCH:
1881 type_str = "match";
1882 break;
1884 case CB_TYPE_TARGET:
1885 type_str = "target";
1886 break;
1888 default:
1889 type_str = "<unknown>";
1890 }
1891 DEBUG ("java plugin: Registering new %s callback: %s",
1892 type_str, cbi->name);
1893 #endif
1895 pthread_mutex_lock (&java_callbacks_lock);
1897 tmp = realloc (java_callbacks,
1898 (java_callbacks_num + 1) * sizeof (*java_callbacks));
1899 if (tmp == NULL)
1900 {
1901 pthread_mutex_unlock (&java_callbacks_lock);
1902 ERROR ("java plugin: cjni_callback_register: realloc failed.");
1904 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1905 free (cbi);
1907 return (-1);
1908 }
1909 java_callbacks = tmp;
1910 java_callbacks[java_callbacks_num] = *cbi;
1911 java_callbacks_num++;
1913 pthread_mutex_unlock (&java_callbacks_lock);
1915 free (cbi);
1916 return (0);
1917 } /* }}} int cjni_callback_register */
1919 /* Callback for `pthread_key_create'. It frees the data contained in
1920 * `jvm_env_key' and prints a warning if the reference counter is not zero. */
1921 static void cjni_jvm_env_destroy (void *args) /* {{{ */
1922 {
1923 cjni_jvm_env_t *cjni_env;
1925 if (args == NULL)
1926 return;
1928 cjni_env = (cjni_jvm_env_t *) args;
1930 if (cjni_env->reference_counter > 0)
1931 {
1932 ERROR ("java plugin: cjni_jvm_env_destroy: "
1933 "cjni_env->reference_counter = %i;", cjni_env->reference_counter);
1934 }
1936 if (cjni_env->jvm_env != NULL)
1937 {
1938 ERROR ("java plugin: cjni_jvm_env_destroy: cjni_env->jvm_env = %p;",
1939 (void *) cjni_env->jvm_env);
1940 }
1942 /* The pointer is allocated in `cjni_thread_attach' */
1943 free (cjni_env);
1944 } /* }}} void cjni_jvm_env_destroy */
1946 /* Register ``native'' functions with the JVM. Native functions are C-functions
1947 * that can be called by Java code. */
1948 static int cjni_init_native (JNIEnv *jvm_env) /* {{{ */
1949 {
1950 jclass api_class_ptr;
1951 int status;
1953 api_class_ptr = (*jvm_env)->FindClass (jvm_env, "org/collectd/api/Collectd");
1954 if (api_class_ptr == NULL)
1955 {
1956 ERROR ("cjni_init_native: Cannot find the API class \"org.collectd.api"
1957 ".Collectd\". Please set the correct class path "
1958 "using 'JVMArg \"-Djava.class.path=...\"'.");
1959 return (-1);
1960 }
1962 status = (*jvm_env)->RegisterNatives (jvm_env, api_class_ptr,
1963 jni_api_functions, (jint) jni_api_functions_num);
1964 if (status != 0)
1965 {
1966 ERROR ("cjni_init_native: RegisterNatives failed with status %i.", status);
1967 return (-1);
1968 }
1970 return (0);
1971 } /* }}} int cjni_init_native */
1973 /* Create the JVM. This is called when the first thread tries to access the JVM
1974 * via cjni_thread_attach. */
1975 static int cjni_create_jvm (void) /* {{{ */
1976 {
1977 JNIEnv *jvm_env;
1978 JavaVMInitArgs vm_args = { 0 };
1979 JavaVMOption vm_options[jvm_argc];
1981 int status;
1982 size_t i;
1984 if (jvm != NULL)
1985 return (0);
1987 status = pthread_key_create (&jvm_env_key, cjni_jvm_env_destroy);
1988 if (status != 0)
1989 {
1990 ERROR ("java plugin: cjni_create_jvm: pthread_key_create failed "
1991 "with status %i.", status);
1992 return (-1);
1993 }
1995 jvm_env = NULL;
1997 vm_args.version = JNI_VERSION_1_2;
1998 vm_args.options = vm_options;
1999 vm_args.nOptions = (jint) jvm_argc;
2001 for (i = 0; i < jvm_argc; i++)
2002 {
2003 DEBUG ("java plugin: cjni_create_jvm: jvm_argv[%zu] = %s",
2004 i, jvm_argv[i]);
2005 vm_args.options[i].optionString = jvm_argv[i];
2006 }
2008 status = JNI_CreateJavaVM (&jvm, (void *) &jvm_env, (void *) &vm_args);
2009 if (status != 0)
2010 {
2011 ERROR ("java plugin: cjni_create_jvm: "
2012 "JNI_CreateJavaVM failed with status %i.",
2013 status);
2014 return (-1);
2015 }
2016 assert (jvm != NULL);
2017 assert (jvm_env != NULL);
2019 /* Call RegisterNatives */
2020 status = cjni_init_native (jvm_env);
2021 if (status != 0)
2022 {
2023 ERROR ("java plugin: cjni_create_jvm: cjni_init_native failed.");
2024 return (-1);
2025 }
2027 DEBUG ("java plugin: The JVM has been created.");
2028 return (0);
2029 } /* }}} int cjni_create_jvm */
2031 /* Increase the reference counter to the JVM for this thread. If it was zero,
2032 * attach the JVM first. */
2033 static JNIEnv *cjni_thread_attach (void) /* {{{ */
2034 {
2035 cjni_jvm_env_t *cjni_env;
2036 JNIEnv *jvm_env;
2038 /* If we're the first thread to access the JVM, we'll have to create it
2039 * first.. */
2040 if (jvm == NULL)
2041 {
2042 int status;
2044 status = cjni_create_jvm ();
2045 if (status != 0)
2046 {
2047 ERROR ("java plugin: cjni_thread_attach: cjni_create_jvm failed.");
2048 return (NULL);
2049 }
2050 }
2051 assert (jvm != NULL);
2053 cjni_env = pthread_getspecific (jvm_env_key);
2054 if (cjni_env == NULL)
2055 {
2056 /* This pointer is free'd in `cjni_jvm_env_destroy'. */
2057 cjni_env = calloc (1, sizeof (*cjni_env));
2058 if (cjni_env == NULL)
2059 {
2060 ERROR ("java plugin: cjni_thread_attach: calloc failed.");
2061 return (NULL);
2062 }
2063 cjni_env->reference_counter = 0;
2064 cjni_env->jvm_env = NULL;
2066 pthread_setspecific (jvm_env_key, cjni_env);
2067 }
2069 if (cjni_env->reference_counter > 0)
2070 {
2071 cjni_env->reference_counter++;
2072 jvm_env = cjni_env->jvm_env;
2073 }
2074 else
2075 {
2076 int status;
2077 JavaVMAttachArgs args = { 0 };
2079 assert (cjni_env->jvm_env == NULL);
2081 args.version = JNI_VERSION_1_2;
2083 status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, (void *) &args);
2084 if (status != 0)
2085 {
2086 ERROR ("java plugin: cjni_thread_attach: AttachCurrentThread failed "
2087 "with status %i.", status);
2088 return (NULL);
2089 }
2091 cjni_env->reference_counter = 1;
2092 cjni_env->jvm_env = jvm_env;
2093 }
2095 DEBUG ("java plugin: cjni_thread_attach: cjni_env->reference_counter = %i",
2096 cjni_env->reference_counter);
2097 assert (jvm_env != NULL);
2098 return (jvm_env);
2099 } /* }}} JNIEnv *cjni_thread_attach */
2101 /* Decrease the reference counter of this thread. If it reaches zero, detach
2102 * from the JVM. */
2103 static int cjni_thread_detach (void) /* {{{ */
2104 {
2105 cjni_jvm_env_t *cjni_env;
2106 int status;
2108 cjni_env = pthread_getspecific (jvm_env_key);
2109 if (cjni_env == NULL)
2110 {
2111 ERROR ("java plugin: cjni_thread_detach: pthread_getspecific failed.");
2112 return (-1);
2113 }
2115 assert (cjni_env->reference_counter > 0);
2116 assert (cjni_env->jvm_env != NULL);
2118 cjni_env->reference_counter--;
2119 DEBUG ("java plugin: cjni_thread_detach: cjni_env->reference_counter = %i",
2120 cjni_env->reference_counter);
2122 if (cjni_env->reference_counter > 0)
2123 return (0);
2125 status = (*jvm)->DetachCurrentThread (jvm);
2126 if (status != 0)
2127 {
2128 ERROR ("java plugin: cjni_thread_detach: DetachCurrentThread failed "
2129 "with status %i.", status);
2130 }
2132 cjni_env->reference_counter = 0;
2133 cjni_env->jvm_env = NULL;
2135 return (0);
2136 } /* }}} int cjni_thread_detach */
2138 static int cjni_config_add_jvm_arg (oconfig_item_t *ci) /* {{{ */
2139 {
2140 char **tmp;
2142 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
2143 {
2144 WARNING ("java plugin: `JVMArg' needs exactly one string argument.");
2145 return (-1);
2146 }
2148 if (jvm != NULL)
2149 {
2150 ERROR ("java plugin: All `JVMArg' options MUST appear before all "
2151 "`LoadPlugin' options! The JVM is already started and I have to "
2152 "ignore this argument: %s",
2153 ci->values[0].value.string);
2154 return (-1);
2155 }
2157 tmp = realloc (jvm_argv, sizeof (char *) * (jvm_argc + 1));
2158 if (tmp == NULL)
2159 {
2160 ERROR ("java plugin: realloc failed.");
2161 return (-1);
2162 }
2163 jvm_argv = tmp;
2165 jvm_argv[jvm_argc] = strdup (ci->values[0].value.string);
2166 if (jvm_argv[jvm_argc] == NULL)
2167 {
2168 ERROR ("java plugin: strdup failed.");
2169 return (-1);
2170 }
2171 jvm_argc++;
2173 return (0);
2174 } /* }}} int cjni_config_add_jvm_arg */
2176 static int cjni_config_load_plugin (oconfig_item_t *ci) /* {{{ */
2177 {
2178 JNIEnv *jvm_env;
2179 java_plugin_class_t *class;
2180 jmethodID constructor_id;
2181 jobject tmp_object;
2183 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
2184 {
2185 WARNING ("java plugin: `LoadPlugin' needs exactly one string argument.");
2186 return (-1);
2187 }
2189 jvm_env = cjni_thread_attach ();
2190 if (jvm_env == NULL)
2191 return (-1);
2193 class = realloc (java_classes_list,
2194 (java_classes_list_len + 1) * sizeof (*java_classes_list));
2195 if (class == NULL)
2196 {
2197 ERROR ("java plugin: realloc failed.");
2198 cjni_thread_detach ();
2199 return (-1);
2200 }
2201 java_classes_list = class;
2202 class = java_classes_list + java_classes_list_len;
2204 memset (class, 0, sizeof (*class));
2205 class->name = strdup (ci->values[0].value.string);
2206 if (class->name == NULL)
2207 {
2208 ERROR ("java plugin: strdup failed.");
2209 cjni_thread_detach ();
2210 return (-1);
2211 }
2212 class->class = NULL;
2213 class->object = NULL;
2215 { /* Replace all dots ('.') with slashes ('/'). Dots are usually used
2216 thorough the Java community, but (Sun's) `FindClass' and friends need
2217 slashes. */
2218 size_t i;
2219 for (i = 0; class->name[i] != 0; i++)
2220 if (class->name[i] == '.')
2221 class->name[i] = '/';
2222 }
2224 DEBUG ("java plugin: Loading class %s", class->name);
2226 class->class = (*jvm_env)->FindClass (jvm_env, class->name);
2227 if (class->class == NULL)
2228 {
2229 ERROR ("java plugin: cjni_config_load_plugin: FindClass (%s) failed.",
2230 class->name);
2231 cjni_thread_detach ();
2232 free (class->name);
2233 return (-1);
2234 }
2236 constructor_id = (*jvm_env)->GetMethodID (jvm_env, class->class,
2237 "<init>", "()V");
2238 if (constructor_id == NULL)
2239 {
2240 ERROR ("java plugin: cjni_config_load_plugin: "
2241 "Could not find the constructor for `%s'.",
2242 class->name);
2243 cjni_thread_detach ();
2244 free (class->name);
2245 return (-1);
2246 }
2248 tmp_object = (*jvm_env)->NewObject (jvm_env, class->class,
2249 constructor_id);
2250 if (tmp_object != NULL)
2251 class->object = (*jvm_env)->NewGlobalRef (jvm_env, tmp_object);
2252 else
2253 class->object = NULL;
2254 if (class->object == NULL)
2255 {
2256 ERROR ("java plugin: cjni_config_load_plugin: "
2257 "Could create a new `%s' object.",
2258 class->name);
2259 cjni_thread_detach ();
2260 free (class->name);
2261 return (-1);
2262 }
2264 cjni_thread_detach ();
2266 java_classes_list_len++;
2268 return (0);
2269 } /* }}} int cjni_config_load_plugin */
2271 static int cjni_config_plugin_block (oconfig_item_t *ci) /* {{{ */
2272 {
2273 JNIEnv *jvm_env;
2274 cjni_callback_info_t *cbi;
2275 jobject o_ocitem;
2276 const char *name;
2277 size_t i;
2279 jclass class;
2280 jmethodID method;
2282 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
2283 {
2284 WARNING ("java plugin: `Plugin' blocks "
2285 "need exactly one string argument.");
2286 return (-1);
2287 }
2289 name = ci->values[0].value.string;
2291 cbi = NULL;
2292 for (i = 0; i < java_callbacks_num; i++)
2293 {
2294 if (java_callbacks[i].type != CB_TYPE_CONFIG)
2295 continue;
2297 if (strcmp (name, java_callbacks[i].name) != 0)
2298 continue;
2300 cbi = java_callbacks + i;
2301 break;
2302 }
2304 if (cbi == NULL)
2305 {
2306 NOTICE ("java plugin: Configuration block for `%s' found, but no such "
2307 "configuration callback has been registered. Please make sure, the "
2308 "`LoadPlugin' lines precede the `Plugin' blocks.",
2309 name);
2310 return (0);
2311 }
2313 DEBUG ("java plugin: Configuring %s", name);
2315 jvm_env = cjni_thread_attach ();
2316 if (jvm_env == NULL)
2317 return (-1);
2319 o_ocitem = ctoj_oconfig_item (jvm_env, ci);
2320 if (o_ocitem == NULL)
2321 {
2322 ERROR ("java plugin: cjni_config_plugin_block: ctoj_oconfig_item failed.");
2323 cjni_thread_detach ();
2324 return (-1);
2325 }
2327 class = (*jvm_env)->GetObjectClass (jvm_env, cbi->object);
2328 method = (*jvm_env)->GetMethodID (jvm_env, class,
2329 "config", "(Lorg/collectd/api/OConfigItem;)I");
2331 (*jvm_env)->CallIntMethod (jvm_env,
2332 cbi->object, method, o_ocitem);
2334 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
2335 cjni_thread_detach ();
2336 return (0);
2337 } /* }}} int cjni_config_plugin_block */
2339 static int cjni_config_perform (oconfig_item_t *ci) /* {{{ */
2340 {
2341 int success;
2342 int errors;
2343 int status;
2344 int i;
2346 success = 0;
2347 errors = 0;
2349 for (i = 0; i < ci->children_num; i++)
2350 {
2351 oconfig_item_t *child = ci->children + i;
2353 if (strcasecmp ("JVMArg", child->key) == 0)
2354 {
2355 status = cjni_config_add_jvm_arg (child);
2356 if (status == 0)
2357 success++;
2358 else
2359 errors++;
2360 }
2361 else if (strcasecmp ("LoadPlugin", child->key) == 0)
2362 {
2363 status = cjni_config_load_plugin (child);
2364 if (status == 0)
2365 success++;
2366 else
2367 errors++;
2368 }
2369 else if (strcasecmp ("Plugin", child->key) == 0)
2370 {
2371 status = cjni_config_plugin_block (child);
2372 if (status == 0)
2373 success++;
2374 else
2375 errors++;
2376 }
2377 else
2378 {
2379 WARNING ("java plugin: Option `%s' not allowed here.", child->key);
2380 errors++;
2381 }
2382 }
2384 DEBUG ("java plugin: jvm_argc = %zu;", jvm_argc);
2385 DEBUG ("java plugin: java_classes_list_len = %zu;", java_classes_list_len);
2387 if ((success == 0) && (errors > 0))
2388 {
2389 ERROR ("java plugin: All statements failed.");
2390 return (-1);
2391 }
2393 return (0);
2394 } /* }}} int cjni_config_perform */
2396 /* Copy the children of `ci' to the global `config_block' variable. */
2397 static int cjni_config_callback (oconfig_item_t *ci) /* {{{ */
2398 {
2399 oconfig_item_t *ci_copy;
2400 oconfig_item_t *tmp;
2402 assert (ci != NULL);
2403 if (ci->children_num == 0)
2404 return (0); /* nothing to do */
2406 ci_copy = oconfig_clone (ci);
2407 if (ci_copy == NULL)
2408 {
2409 ERROR ("java plugin: oconfig_clone failed.");
2410 return (-1);
2411 }
2413 if (config_block == NULL)
2414 {
2415 config_block = ci_copy;
2416 return (0);
2417 }
2419 tmp = realloc (config_block->children,
2420 (config_block->children_num + ci_copy->children_num) * sizeof (*tmp));
2421 if (tmp == NULL)
2422 {
2423 ERROR ("java plugin: realloc failed.");
2424 oconfig_free (ci_copy);
2425 return (-1);
2426 }
2427 config_block->children = tmp;
2429 /* Copy the pointers */
2430 memcpy (config_block->children + config_block->children_num,
2431 ci_copy->children,
2432 ci_copy->children_num * sizeof (*ci_copy->children));
2433 config_block->children_num += ci_copy->children_num;
2435 /* Delete the pointers from the copy, so `oconfig_free' can't free them. */
2436 memset (ci_copy->children, 0,
2437 ci_copy->children_num * sizeof (*ci_copy->children));
2438 ci_copy->children_num = 0;
2440 oconfig_free (ci_copy);
2442 return (0);
2443 } /* }}} int cjni_config_callback */
2445 /* Free the data contained in the `user_data_t' pointer passed to `cjni_read'
2446 * and `cjni_write'. In particular, delete the global reference to the Java
2447 * object. */
2448 static void cjni_callback_info_destroy (void *arg) /* {{{ */
2449 {
2450 JNIEnv *jvm_env;
2451 cjni_callback_info_t *cbi;
2453 DEBUG ("java plugin: cjni_callback_info_destroy (arg = %p);", arg);
2455 cbi = (cjni_callback_info_t *) arg;
2457 /* This condition can occur when shutting down. */
2458 if (jvm == NULL)
2459 {
2460 sfree (cbi);
2461 return;
2462 }
2464 if (arg == NULL)
2465 return;
2467 jvm_env = cjni_thread_attach ();
2468 if (jvm_env == NULL)
2469 {
2470 ERROR ("java plugin: cjni_callback_info_destroy: cjni_thread_attach failed.");
2471 return;
2472 }
2474 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
2476 cbi->method = NULL;
2477 cbi->object = NULL;
2478 cbi->class = NULL;
2479 free (cbi);
2481 cjni_thread_detach ();
2482 } /* }}} void cjni_callback_info_destroy */
2484 /* Call the CB_TYPE_READ callback pointed to by the `user_data_t' pointer. */
2485 static int cjni_read (user_data_t *ud) /* {{{ */
2486 {
2487 JNIEnv *jvm_env;
2488 cjni_callback_info_t *cbi;
2489 int ret_status;
2491 if (jvm == NULL)
2492 {
2493 ERROR ("java plugin: cjni_read: jvm == NULL");
2494 return (-1);
2495 }
2497 if ((ud == NULL) || (ud->data == NULL))
2498 {
2499 ERROR ("java plugin: cjni_read: Invalid user data.");
2500 return (-1);
2501 }
2503 jvm_env = cjni_thread_attach ();
2504 if (jvm_env == NULL)
2505 return (-1);
2507 cbi = (cjni_callback_info_t *) ud->data;
2509 ret_status = (*jvm_env)->CallIntMethod (jvm_env, cbi->object,
2510 cbi->method);
2512 cjni_thread_detach ();
2513 return (ret_status);
2514 } /* }}} int cjni_read */
2516 /* Call the CB_TYPE_WRITE callback pointed to by the `user_data_t' pointer. */
2517 static int cjni_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
2518 user_data_t *ud)
2519 {
2520 JNIEnv *jvm_env;
2521 cjni_callback_info_t *cbi;
2522 jobject vl_java;
2523 int ret_status;
2525 if (jvm == NULL)
2526 {
2527 ERROR ("java plugin: cjni_write: jvm == NULL");
2528 return (-1);
2529 }
2531 if ((ud == NULL) || (ud->data == NULL))
2532 {
2533 ERROR ("java plugin: cjni_write: Invalid user data.");
2534 return (-1);
2535 }
2537 jvm_env = cjni_thread_attach ();
2538 if (jvm_env == NULL)
2539 return (-1);
2541 cbi = (cjni_callback_info_t *) ud->data;
2543 vl_java = ctoj_value_list (jvm_env, ds, vl);
2544 if (vl_java == NULL)
2545 {
2546 ERROR ("java plugin: cjni_write: ctoj_value_list failed.");
2547 cjni_thread_detach ();
2548 return (-1);
2549 }
2551 ret_status = (*jvm_env)->CallIntMethod (jvm_env,
2552 cbi->object, cbi->method, vl_java);
2554 (*jvm_env)->DeleteLocalRef (jvm_env, vl_java);
2556 cjni_thread_detach ();
2557 return (ret_status);
2558 } /* }}} int cjni_write */
2560 /* Call the CB_TYPE_FLUSH callback pointed to by the `user_data_t' pointer. */
2561 static int cjni_flush (cdtime_t timeout, const char *identifier, /* {{{ */
2562 user_data_t *ud)
2563 {
2564 JNIEnv *jvm_env;
2565 cjni_callback_info_t *cbi;
2566 jobject o_timeout;
2567 jobject o_identifier;
2568 int ret_status;
2570 if (jvm == NULL)
2571 {
2572 ERROR ("java plugin: cjni_flush: jvm == NULL");
2573 return (-1);
2574 }
2576 if ((ud == NULL) || (ud->data == NULL))
2577 {
2578 ERROR ("java plugin: cjni_flush: Invalid user data.");
2579 return (-1);
2580 }
2582 jvm_env = cjni_thread_attach ();
2583 if (jvm_env == NULL)
2584 return (-1);
2586 cbi = (cjni_callback_info_t *) ud->data;
2588 o_timeout = ctoj_jdouble_to_number (jvm_env,
2589 (jdouble) CDTIME_T_TO_DOUBLE (timeout));
2590 if (o_timeout == NULL)
2591 {
2592 ERROR ("java plugin: cjni_flush: Converting double "
2593 "to Number object failed.");
2594 cjni_thread_detach ();
2595 return (-1);
2596 }
2598 o_identifier = NULL;
2599 if (identifier != NULL)
2600 {
2601 o_identifier = (*jvm_env)->NewStringUTF (jvm_env, identifier);
2602 if (o_identifier == NULL)
2603 {
2604 (*jvm_env)->DeleteLocalRef (jvm_env, o_timeout);
2605 ERROR ("java plugin: cjni_flush: NewStringUTF failed.");
2606 cjni_thread_detach ();
2607 return (-1);
2608 }
2609 }
2611 ret_status = (*jvm_env)->CallIntMethod (jvm_env,
2612 cbi->object, cbi->method, o_timeout, o_identifier);
2614 (*jvm_env)->DeleteLocalRef (jvm_env, o_identifier);
2615 (*jvm_env)->DeleteLocalRef (jvm_env, o_timeout);
2617 cjni_thread_detach ();
2618 return (ret_status);
2619 } /* }}} int cjni_flush */
2621 /* Call the CB_TYPE_LOG callback pointed to by the `user_data_t' pointer. */
2622 static void cjni_log (int severity, const char *message, /* {{{ */
2623 user_data_t *ud)
2624 {
2625 JNIEnv *jvm_env;
2626 cjni_callback_info_t *cbi;
2627 jobject o_message;
2629 if (jvm == NULL)
2630 return;
2632 if ((ud == NULL) || (ud->data == NULL))
2633 return;
2635 jvm_env = cjni_thread_attach ();
2636 if (jvm_env == NULL)
2637 return;
2639 cbi = (cjni_callback_info_t *) ud->data;
2641 o_message = (*jvm_env)->NewStringUTF (jvm_env, message);
2642 if (o_message == NULL)
2643 {
2644 cjni_thread_detach ();
2645 return;
2646 }
2648 (*jvm_env)->CallVoidMethod (jvm_env,
2649 cbi->object, cbi->method, (jint) severity, o_message);
2651 (*jvm_env)->DeleteLocalRef (jvm_env, o_message);
2653 cjni_thread_detach ();
2654 } /* }}} void cjni_log */
2656 /* Call the CB_TYPE_NOTIFICATION callback pointed to by the `user_data_t'
2657 * pointer. */
2658 static int cjni_notification (const notification_t *n, /* {{{ */
2659 user_data_t *ud)
2660 {
2661 JNIEnv *jvm_env;
2662 cjni_callback_info_t *cbi;
2663 jobject o_notification;
2664 int ret_status;
2666 if (jvm == NULL)
2667 {
2668 ERROR ("java plugin: cjni_read: jvm == NULL");
2669 return (-1);
2670 }
2672 if ((ud == NULL) || (ud->data == NULL))
2673 {
2674 ERROR ("java plugin: cjni_read: Invalid user data.");
2675 return (-1);
2676 }
2678 jvm_env = cjni_thread_attach ();
2679 if (jvm_env == NULL)
2680 return (-1);
2682 cbi = (cjni_callback_info_t *) ud->data;
2684 o_notification = ctoj_notification (jvm_env, n);
2685 if (o_notification == NULL)
2686 {
2687 ERROR ("java plugin: cjni_notification: ctoj_notification failed.");
2688 cjni_thread_detach ();
2689 return (-1);
2690 }
2692 ret_status = (*jvm_env)->CallIntMethod (jvm_env,
2693 cbi->object, cbi->method, o_notification);
2695 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
2697 cjni_thread_detach ();
2698 return (ret_status);
2699 } /* }}} int cjni_notification */
2701 /* Callbacks for matches implemented in Java */
2702 static int cjni_match_target_create (const oconfig_item_t *ci, /* {{{ */
2703 void **user_data)
2704 {
2705 JNIEnv *jvm_env;
2706 cjni_callback_info_t *cbi_ret;
2707 cjni_callback_info_t *cbi_factory;
2708 const char *name;
2709 jobject o_ci;
2710 jobject o_tmp;
2711 int type;
2712 size_t i;
2714 cbi_ret = NULL;
2715 o_ci = NULL;
2716 jvm_env = NULL;
2718 #define BAIL_OUT(status) \
2719 if (cbi_ret != NULL) { \
2720 free (cbi_ret->name); \
2721 if ((jvm_env != NULL) && (cbi_ret->object != NULL)) \
2722 (*jvm_env)->DeleteLocalRef (jvm_env, cbi_ret->object); \
2723 } \
2724 free (cbi_ret); \
2725 if (o_ci != NULL) \
2726 (*jvm_env)->DeleteLocalRef (jvm_env, o_ci); \
2727 cjni_thread_detach (); \
2728 return (status)
2730 if (jvm == NULL)
2731 {
2732 ERROR ("java plugin: cjni_read: jvm == NULL");
2733 return (-1);
2734 }
2736 jvm_env = cjni_thread_attach ();
2737 if (jvm_env == NULL)
2738 return (-1);
2740 /* Find out whether to create a match or a target. */
2741 if (strcasecmp ("Match", ci->key) == 0)
2742 type = CB_TYPE_MATCH;
2743 else if (strcasecmp ("Target", ci->key) == 0)
2744 type = CB_TYPE_TARGET;
2745 else
2746 {
2747 ERROR ("java plugin: cjni_match_target_create: Can't figure out whether "
2748 "to create a match or a target.");
2749 BAIL_OUT (-1);
2750 }
2752 /* This is the name of the match we should create. */
2753 name = ci->values[0].value.string;
2755 /* Lets see if we have a matching factory here.. */
2756 cbi_factory = NULL;
2757 for (i = 0; i < java_callbacks_num; i++)
2758 {
2759 if (java_callbacks[i].type != type)
2760 continue;
2762 if (strcmp (name, java_callbacks[i].name) != 0)
2763 continue;
2765 cbi_factory = java_callbacks + i;
2766 break;
2767 }
2769 /* Nope, no factory for that name.. */
2770 if (cbi_factory == NULL)
2771 {
2772 ERROR ("java plugin: cjni_match_target_create: "
2773 "No such match factory registered: %s",
2774 name);
2775 BAIL_OUT (-1);
2776 }
2778 /* We convert `ci' to its Java equivalent.. */
2779 o_ci = ctoj_oconfig_item (jvm_env, ci);
2780 if (o_ci == NULL)
2781 {
2782 ERROR ("java plugin: cjni_match_target_create: "
2783 "ctoj_oconfig_item failed.");
2784 BAIL_OUT (-1);
2785 }
2787 /* Allocate a new callback info structure. This is going to be our user_data
2788 * pointer. */
2789 cbi_ret = calloc (1, sizeof (*cbi_ret));
2790 if (cbi_ret == NULL)
2791 {
2792 ERROR ("java plugin: cjni_match_target_create: calloc failed.");
2793 BAIL_OUT (-1);
2794 }
2796 cbi_ret->object = NULL;
2797 cbi_ret->type = type;
2799 /* Lets fill the callback info structure.. First, the name: */
2800 cbi_ret->name = strdup (name);
2801 if (cbi_ret->name == NULL)
2802 {
2803 ERROR ("java plugin: cjni_match_target_create: strdup failed.");
2804 BAIL_OUT (-1);
2805 }
2807 /* Then call the factory method so it creates a new object for us. */
2808 o_tmp = (*jvm_env)->CallObjectMethod (jvm_env,
2809 cbi_factory->object, cbi_factory->method, o_ci);
2810 if (o_tmp == NULL)
2811 {
2812 ERROR ("java plugin: cjni_match_target_create: CallObjectMethod failed.");
2813 BAIL_OUT (-1);
2814 }
2816 cbi_ret->object = (*jvm_env)->NewGlobalRef (jvm_env, o_tmp);
2817 if (o_tmp == NULL)
2818 {
2819 ERROR ("java plugin: cjni_match_target_create: NewGlobalRef failed.");
2820 BAIL_OUT (-1);
2821 }
2823 /* This is the class of the match. It is possibly different from the class of
2824 * the match-factory! */
2825 cbi_ret->class = (*jvm_env)->GetObjectClass (jvm_env, cbi_ret->object);
2826 if (cbi_ret->class == NULL)
2827 {
2828 ERROR ("java plugin: cjni_match_target_create: GetObjectClass failed.");
2829 BAIL_OUT (-1);
2830 }
2832 /* Lookup the `int match (DataSet, ValueList)' method. */
2833 cbi_ret->method = (*jvm_env)->GetMethodID (jvm_env, cbi_ret->class,
2834 /* method name = */ (type == CB_TYPE_MATCH) ? "match" : "invoke",
2835 "(Lorg/collectd/api/DataSet;Lorg/collectd/api/ValueList;)I");
2836 if (cbi_ret->method == NULL)
2837 {
2838 ERROR ("java plugin: cjni_match_target_create: GetMethodID failed.");
2839 BAIL_OUT (-1);
2840 }
2842 /* Return the newly created match via the user_data pointer. */
2843 *user_data = (void *) cbi_ret;
2845 cjni_thread_detach ();
2847 DEBUG ("java plugin: cjni_match_target_create: "
2848 "Successfully created a `%s' %s.",
2849 cbi_ret->name, (type == CB_TYPE_MATCH) ? "match" : "target");
2851 /* Success! */
2852 return (0);
2853 #undef BAIL_OUT
2854 } /* }}} int cjni_match_target_create */
2856 static int cjni_match_target_destroy (void **user_data) /* {{{ */
2857 {
2858 cjni_callback_info_destroy (*user_data);
2859 *user_data = NULL;
2861 return (0);
2862 } /* }}} int cjni_match_target_destroy */
2864 static int cjni_match_target_invoke (const data_set_t *ds, /* {{{ */
2865 value_list_t *vl, notification_meta_t **meta, void **user_data)
2866 {
2867 JNIEnv *jvm_env;
2868 cjni_callback_info_t *cbi;
2869 jobject o_vl;
2870 jobject o_ds;
2871 int ret_status;
2872 int status;
2874 if (jvm == NULL)
2875 {
2876 ERROR ("java plugin: cjni_match_target_invoke: jvm == NULL");
2877 return (-1);
2878 }
2880 jvm_env = cjni_thread_attach ();
2881 if (jvm_env == NULL)
2882 return (-1);
2884 cbi = (cjni_callback_info_t *) *user_data;
2886 o_vl = ctoj_value_list (jvm_env, ds, vl);
2887 if (o_vl == NULL)
2888 {
2889 ERROR ("java plugin: cjni_match_target_invoke: ctoj_value_list failed.");
2890 cjni_thread_detach ();
2891 return (-1);
2892 }
2894 o_ds = ctoj_data_set (jvm_env, ds);
2895 if (o_ds == NULL)
2896 {
2897 ERROR ("java plugin: cjni_match_target_invoke: ctoj_value_list failed.");
2898 cjni_thread_detach ();
2899 return (-1);
2900 }
2902 ret_status = (*jvm_env)->CallIntMethod (jvm_env, cbi->object, cbi->method,
2903 o_ds, o_vl);
2905 DEBUG ("java plugin: cjni_match_target_invoke: Method returned %i.", ret_status);
2907 /* If we're executing a target, copy the `ValueList' back to our
2908 * `value_list_t'. */
2909 if (cbi->type == CB_TYPE_TARGET)
2910 {
2911 value_list_t new_vl = { 0 };
2913 status = jtoc_value_list (jvm_env, &new_vl, o_vl);
2914 if (status != 0)
2915 {
2916 ERROR ("java plugin: cjni_match_target_invoke: "
2917 "jtoc_value_list failed.");
2918 }
2919 else /* if (status == 0) */
2920 {
2921 /* plugin_dispatch_values assures that this is dynamically allocated
2922 * memory. */
2923 sfree (vl->values);
2925 /* This will replace the vl->values pointer to a new, dynamically
2926 * allocated piece of memory. */
2927 memcpy (vl, &new_vl, sizeof (*vl));
2928 }
2929 } /* if (cbi->type == CB_TYPE_TARGET) */
2931 cjni_thread_detach ();
2932 return (ret_status);
2933 } /* }}} int cjni_match_target_invoke */
2935 /* Iterate over `java_callbacks' and call all CB_TYPE_INIT callbacks. */
2936 static int cjni_init_plugins (JNIEnv *jvm_env) /* {{{ */
2937 {
2938 int status;
2939 size_t i;
2941 for (i = 0; i < java_callbacks_num; i++)
2942 {
2943 if (java_callbacks[i].type != CB_TYPE_INIT)
2944 continue;
2946 DEBUG ("java plugin: Initializing %s", java_callbacks[i].name);
2948 status = (*jvm_env)->CallIntMethod (jvm_env,
2949 java_callbacks[i].object, java_callbacks[i].method);
2950 if (status != 0)
2951 {
2952 ERROR ("java plugin: Initializing `%s' failed with status %i. "
2953 "Removing read function.",
2954 java_callbacks[i].name, status);
2955 plugin_unregister_read (java_callbacks[i].name);
2956 }
2957 }
2959 return (0);
2960 } /* }}} int cjni_init_plugins */
2962 /* Iterate over `java_callbacks' and call all CB_TYPE_SHUTDOWN callbacks. */
2963 static int cjni_shutdown_plugins (JNIEnv *jvm_env) /* {{{ */
2964 {
2965 int status;
2966 size_t i;
2968 for (i = 0; i < java_callbacks_num; i++)
2969 {
2970 if (java_callbacks[i].type != CB_TYPE_SHUTDOWN)
2971 continue;
2973 DEBUG ("java plugin: Shutting down %s", java_callbacks[i].name);
2975 status = (*jvm_env)->CallIntMethod (jvm_env,
2976 java_callbacks[i].object, java_callbacks[i].method);
2977 if (status != 0)
2978 {
2979 ERROR ("java plugin: Shutting down `%s' failed with status %i. ",
2980 java_callbacks[i].name, status);
2981 }
2982 }
2984 return (0);
2985 } /* }}} int cjni_shutdown_plugins */
2988 static int cjni_shutdown (void) /* {{{ */
2989 {
2990 JNIEnv *jvm_env;
2991 JavaVMAttachArgs args = { 0 };
2992 int status;
2993 size_t i;
2995 if (jvm == NULL)
2996 return (0);
2998 jvm_env = NULL;
2999 args.version = JNI_VERSION_1_2;
3001 status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, &args);
3002 if (status != 0)
3003 {
3004 ERROR ("java plugin: cjni_shutdown: AttachCurrentThread failed with status %i.",
3005 status);
3006 return (-1);
3007 }
3009 /* Execute all the shutdown functions registered by plugins. */
3010 cjni_shutdown_plugins (jvm_env);
3012 /* Release all the global references to callback functions */
3013 for (i = 0; i < java_callbacks_num; i++)
3014 {
3015 if (java_callbacks[i].object != NULL)
3016 {
3017 (*jvm_env)->DeleteGlobalRef (jvm_env, java_callbacks[i].object);
3018 java_callbacks[i].object = NULL;
3019 }
3020 sfree (java_callbacks[i].name);
3021 }
3022 java_callbacks_num = 0;
3023 sfree (java_callbacks);
3025 /* Release all the global references to directly loaded classes. */
3026 for (i = 0; i < java_classes_list_len; i++)
3027 {
3028 if (java_classes_list[i].object != NULL)
3029 {
3030 (*jvm_env)->DeleteGlobalRef (jvm_env, java_classes_list[i].object);
3031 java_classes_list[i].object = NULL;
3032 }
3033 sfree (java_classes_list[i].name);
3034 }
3035 java_classes_list_len = 0;
3036 sfree (java_classes_list);
3038 /* Destroy the JVM */
3039 DEBUG ("java plugin: Destroying the JVM.");
3040 (*jvm)->DestroyJavaVM (jvm);
3041 jvm = NULL;
3042 jvm_env = NULL;
3044 pthread_key_delete (jvm_env_key);
3046 /* Free the JVM argument list */
3047 for (i = 0; i < jvm_argc; i++)
3048 sfree (jvm_argv[i]);
3049 jvm_argc = 0;
3050 sfree (jvm_argv);
3052 return (0);
3053 } /* }}} int cjni_shutdown */
3055 /* Initialization: Create a JVM, load all configured classes and call their
3056 * `config' and `init' callback methods. */
3057 static int cjni_init (void) /* {{{ */
3058 {
3059 JNIEnv *jvm_env;
3061 if ((config_block == NULL) && (jvm == NULL))
3062 {
3063 ERROR ("java plugin: cjni_init: No configuration block for "
3064 "the java plugin was found.");
3065 return (-1);
3066 }
3068 if (config_block != NULL)
3069 {
3070 cjni_config_perform (config_block);
3071 oconfig_free (config_block);
3072 }
3074 if (jvm == NULL)
3075 {
3076 ERROR ("java plugin: cjni_init: jvm == NULL");
3077 return (-1);
3078 }
3080 jvm_env = cjni_thread_attach ();
3081 if (jvm_env == NULL)
3082 return (-1);
3084 cjni_init_plugins (jvm_env);
3086 cjni_thread_detach ();
3087 return (0);
3088 } /* }}} int cjni_init */
3090 void module_register (void)
3091 {
3092 plugin_register_complex_config ("java", cjni_config_callback);
3093 plugin_register_init ("java", cjni_init);
3094 plugin_register_shutdown ("java", cjni_shutdown);
3095 } /* void module_register (void) */
3097 /* vim: set sw=2 sts=2 et fdm=marker : */