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"
26 #include "plugin.h"
27 #include "common.h"
28 #include "filter_chain.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 jstring ctoj_output_string (JNIEnv *jvm_env, /* {{{ */
163 const char *string)
164 {
165 jstring o_string;
167 /* Create a java.lang.String */
168 o_string = (*jvm_env)->NewStringUTF (jvm_env,
169 (string != NULL) ? string : "");
170 if (o_string == NULL)
171 {
172 ERROR ("java plugin: ctoj_output_string: NewStringUTF failed.");
173 return NULL;
174 }
176 return (o_string);
177 } /* }}} int ctoj_output_string */
179 static int ctoj_int (JNIEnv *jvm_env, /* {{{ */
180 jint value,
181 jclass class_ptr, jobject object_ptr, const char *method_name)
182 {
183 jmethodID m_set;
185 /* Search for the `void setFoo (int i)' method. */
186 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
187 method_name, "(I)V");
188 if (m_set == NULL)
189 {
190 ERROR ("java plugin: ctoj_int: Cannot find method `void %s (int)'.",
191 method_name);
192 return (-1);
193 }
195 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
197 return (0);
198 } /* }}} int ctoj_int */
200 static int ctoj_long (JNIEnv *jvm_env, /* {{{ */
201 jlong value,
202 jclass class_ptr, jobject object_ptr, const char *method_name)
203 {
204 jmethodID m_set;
206 /* Search for the `void setFoo (long l)' method. */
207 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
208 method_name, "(J)V");
209 if (m_set == NULL)
210 {
211 ERROR ("java plugin: ctoj_long: Cannot find method `void %s (long)'.",
212 method_name);
213 return (-1);
214 }
216 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
218 return (0);
219 } /* }}} int ctoj_long */
221 static int ctoj_double (JNIEnv *jvm_env, /* {{{ */
222 jdouble value,
223 jclass class_ptr, jobject object_ptr, const char *method_name)
224 {
225 jmethodID m_set;
227 /* Search for the `void setFoo (double d)' method. */
228 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
229 method_name, "(D)V");
230 if (m_set == NULL)
231 {
232 ERROR ("java plugin: ctoj_double: Cannot find method `void %s (double)'.",
233 method_name);
234 return (-1);
235 }
237 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
239 return (0);
240 } /* }}} int ctoj_double */
242 /* Convert a jlong to a java.lang.Number */
243 static jobject ctoj_jlong_to_number (JNIEnv *jvm_env, jlong value) /* {{{ */
244 {
245 jclass c_long;
246 jmethodID m_long_constructor;
248 /* Look up the java.lang.Long class */
249 c_long = (*jvm_env)->FindClass (jvm_env, "java/lang/Long");
250 if (c_long == NULL)
251 {
252 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
253 "java.lang.Long class failed.");
254 return (NULL);
255 }
257 m_long_constructor = (*jvm_env)->GetMethodID (jvm_env,
258 c_long, "<init>", "(J)V");
259 if (m_long_constructor == NULL)
260 {
261 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
262 "`Long (long)' constructor failed.");
263 return (NULL);
264 }
266 return ((*jvm_env)->NewObject (jvm_env,
267 c_long, m_long_constructor, value));
268 } /* }}} jobject ctoj_jlong_to_number */
270 /* Convert a jdouble to a java.lang.Number */
271 static jobject ctoj_jdouble_to_number (JNIEnv *jvm_env, jdouble value) /* {{{ */
272 {
273 jclass c_double;
274 jmethodID m_double_constructor;
276 /* Look up the java.lang.Long class */
277 c_double = (*jvm_env)->FindClass (jvm_env, "java/lang/Double");
278 if (c_double == NULL)
279 {
280 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
281 "java.lang.Double class failed.");
282 return (NULL);
283 }
285 m_double_constructor = (*jvm_env)->GetMethodID (jvm_env,
286 c_double, "<init>", "(D)V");
287 if (m_double_constructor == NULL)
288 {
289 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
290 "`Double (double)' constructor failed.");
291 return (NULL);
292 }
294 return ((*jvm_env)->NewObject (jvm_env,
295 c_double, m_double_constructor, value));
296 } /* }}} jobject ctoj_jdouble_to_number */
298 /* Convert a value_t to a java.lang.Number */
299 static jobject ctoj_value_to_number (JNIEnv *jvm_env, /* {{{ */
300 value_t value, int ds_type)
301 {
302 if (ds_type == DS_TYPE_COUNTER)
303 return (ctoj_jlong_to_number (jvm_env, (jlong) value.counter));
304 else if (ds_type == DS_TYPE_GAUGE)
305 return (ctoj_jdouble_to_number (jvm_env, (jdouble) value.gauge));
306 if (ds_type == DS_TYPE_DERIVE)
307 return (ctoj_jlong_to_number (jvm_env, (jlong) value.derive));
308 if (ds_type == DS_TYPE_ABSOLUTE)
309 return (ctoj_jlong_to_number (jvm_env, (jlong) value.absolute));
310 else
311 return (NULL);
312 } /* }}} jobject ctoj_value_to_number */
314 /* Convert a data_source_t to a org/collectd/api/DataSource */
315 static jobject ctoj_data_source (JNIEnv *jvm_env, /* {{{ */
316 const data_source_t *dsrc)
317 {
318 jclass c_datasource;
319 jmethodID m_datasource_constructor;
320 jobject o_datasource;
321 int status;
323 /* Look up the DataSource class */
324 c_datasource = (*jvm_env)->FindClass (jvm_env,
325 "org/collectd/api/DataSource");
326 if (c_datasource == NULL)
327 {
328 ERROR ("java plugin: ctoj_data_source: "
329 "FindClass (org/collectd/api/DataSource) failed.");
330 return (NULL);
331 }
333 /* Lookup the `ValueList ()' constructor. */
334 m_datasource_constructor = (*jvm_env)->GetMethodID (jvm_env, c_datasource,
335 "<init>", "()V");
336 if (m_datasource_constructor == NULL)
337 {
338 ERROR ("java plugin: ctoj_data_source: Cannot find the "
339 "`DataSource ()' constructor.");
340 return (NULL);
341 }
343 /* Create a new instance. */
344 o_datasource = (*jvm_env)->NewObject (jvm_env, c_datasource,
345 m_datasource_constructor);
346 if (o_datasource == NULL)
347 {
348 ERROR ("java plugin: ctoj_data_source: "
349 "Creating a new DataSource instance failed.");
350 return (NULL);
351 }
353 /* Set name via `void setName (String name)' */
354 status = ctoj_string (jvm_env, dsrc->name,
355 c_datasource, o_datasource, "setName");
356 if (status != 0)
357 {
358 ERROR ("java plugin: ctoj_data_source: "
359 "ctoj_string (setName) failed.");
360 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
361 return (NULL);
362 }
364 /* Set type via `void setType (int type)' */
365 status = ctoj_int (jvm_env, dsrc->type,
366 c_datasource, o_datasource, "setType");
367 if (status != 0)
368 {
369 ERROR ("java plugin: ctoj_data_source: "
370 "ctoj_int (setType) failed.");
371 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
372 return (NULL);
373 }
375 /* Set min via `void setMin (double min)' */
376 status = ctoj_double (jvm_env, dsrc->min,
377 c_datasource, o_datasource, "setMin");
378 if (status != 0)
379 {
380 ERROR ("java plugin: ctoj_data_source: "
381 "ctoj_double (setMin) failed.");
382 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
383 return (NULL);
384 }
386 /* Set max via `void setMax (double max)' */
387 status = ctoj_double (jvm_env, dsrc->max,
388 c_datasource, o_datasource, "setMax");
389 if (status != 0)
390 {
391 ERROR ("java plugin: ctoj_data_source: "
392 "ctoj_double (setMax) failed.");
393 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
394 return (NULL);
395 }
397 return (o_datasource);
398 } /* }}} jobject ctoj_data_source */
400 /* Convert a oconfig_value_t to a org/collectd/api/OConfigValue */
401 static jobject ctoj_oconfig_value (JNIEnv *jvm_env, /* {{{ */
402 oconfig_value_t ocvalue)
403 {
404 jclass c_ocvalue;
405 jmethodID m_ocvalue_constructor;
406 jobject o_argument;
407 jobject o_ocvalue;
409 m_ocvalue_constructor = NULL;
410 o_argument = NULL;
412 c_ocvalue = (*jvm_env)->FindClass (jvm_env,
413 "org/collectd/api/OConfigValue");
414 if (c_ocvalue == NULL)
415 {
416 ERROR ("java plugin: ctoj_oconfig_value: "
417 "FindClass (org/collectd/api/OConfigValue) failed.");
418 return (NULL);
419 }
421 if (ocvalue.type == OCONFIG_TYPE_BOOLEAN)
422 {
423 jboolean tmp_boolean;
425 tmp_boolean = (ocvalue.value.boolean == 0) ? JNI_FALSE : JNI_TRUE;
427 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
428 "<init>", "(Z)V");
429 if (m_ocvalue_constructor == NULL)
430 {
431 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
432 "`OConfigValue (boolean)' constructor.");
433 return (NULL);
434 }
436 return ((*jvm_env)->NewObject (jvm_env,
437 c_ocvalue, m_ocvalue_constructor, tmp_boolean));
438 } /* if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) */
439 else if (ocvalue.type == OCONFIG_TYPE_STRING)
440 {
441 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
442 "<init>", "(Ljava/lang/String;)V");
443 if (m_ocvalue_constructor == NULL)
444 {
445 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
446 "`OConfigValue (String)' constructor.");
447 return (NULL);
448 }
450 o_argument = (*jvm_env)->NewStringUTF (jvm_env, ocvalue.value.string);
451 if (o_argument == NULL)
452 {
453 ERROR ("java plugin: ctoj_oconfig_value: "
454 "Creating a String object failed.");
455 return (NULL);
456 }
457 }
458 else if (ocvalue.type == OCONFIG_TYPE_NUMBER)
459 {
460 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
461 "<init>", "(Ljava/lang/Number;)V");
462 if (m_ocvalue_constructor == NULL)
463 {
464 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
465 "`OConfigValue (Number)' constructor.");
466 return (NULL);
467 }
469 o_argument = ctoj_jdouble_to_number (jvm_env,
470 (jdouble) ocvalue.value.number);
471 if (o_argument == NULL)
472 {
473 ERROR ("java plugin: ctoj_oconfig_value: "
474 "Creating a Number object failed.");
475 return (NULL);
476 }
477 }
478 else
479 {
480 return (NULL);
481 }
483 assert (m_ocvalue_constructor != NULL);
484 assert (o_argument != NULL);
486 o_ocvalue = (*jvm_env)->NewObject (jvm_env,
487 c_ocvalue, m_ocvalue_constructor, o_argument);
488 if (o_ocvalue == NULL)
489 {
490 ERROR ("java plugin: ctoj_oconfig_value: "
491 "Creating an OConfigValue object failed.");
492 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
493 return (NULL);
494 }
496 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
497 return (o_ocvalue);
498 } /* }}} jobject ctoj_oconfig_value */
500 /* Convert a oconfig_item_t to a org/collectd/api/OConfigItem */
501 static jobject ctoj_oconfig_item (JNIEnv *jvm_env, /* {{{ */
502 const oconfig_item_t *ci)
503 {
504 jclass c_ocitem;
505 jmethodID m_ocitem_constructor;
506 jmethodID m_addvalue;
507 jmethodID m_addchild;
508 jobject o_key;
509 jobject o_ocitem;
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 (int 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 (int 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;
621 /* Look up the org/collectd/api/DataSet class */
622 c_dataset = (*jvm_env)->FindClass (jvm_env, "org/collectd/api/DataSet");
623 if (c_dataset == NULL)
624 {
625 ERROR ("java plugin: ctoj_data_set: Looking up the "
626 "org/collectd/api/DataSet class failed.");
627 return (NULL);
628 }
630 /* Search for the `DataSet (String type)' constructor. */
631 m_constructor = (*jvm_env)->GetMethodID (jvm_env,
632 c_dataset, "<init>", "(Ljava/lang/String;)V");
633 if (m_constructor == NULL)
634 {
635 ERROR ("java plugin: ctoj_data_set: Looking up the "
636 "`DataSet (String)' constructor failed.");
637 return (NULL);
638 }
640 /* Search for the `void addDataSource (DataSource)' method. */
641 m_add = (*jvm_env)->GetMethodID (jvm_env,
642 c_dataset, "addDataSource", "(Lorg/collectd/api/DataSource;)V");
643 if (m_add == NULL)
644 {
645 ERROR ("java plugin: ctoj_data_set: Looking up the "
646 "`addDataSource (DataSource)' method failed.");
647 return (NULL);
648 }
650 o_type = (*jvm_env)->NewStringUTF (jvm_env, ds->type);
651 if (o_type == NULL)
652 {
653 ERROR ("java plugin: ctoj_data_set: Creating a String object failed.");
654 return (NULL);
655 }
657 o_dataset = (*jvm_env)->NewObject (jvm_env,
658 c_dataset, m_constructor, o_type);
659 if (o_dataset == NULL)
660 {
661 ERROR ("java plugin: ctoj_data_set: Creating a DataSet object failed.");
662 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
663 return (NULL);
664 }
666 /* Decrease reference counter on the java.lang.String object. */
667 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
669 for (size_t i = 0; i < ds->ds_num; i++)
670 {
671 jobject o_datasource;
673 o_datasource = ctoj_data_source (jvm_env, ds->ds + i);
674 if (o_datasource == NULL)
675 {
676 ERROR ("java plugin: ctoj_data_set: ctoj_data_source (%s.%s) failed",
677 ds->type, ds->ds[i].name);
678 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
679 return (NULL);
680 }
682 (*jvm_env)->CallVoidMethod (jvm_env, o_dataset, m_add, o_datasource);
684 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
685 } /* for (i = 0; i < ds->ds_num; i++) */
687 return (o_dataset);
688 } /* }}} jobject ctoj_data_set */
690 static int ctoj_value_list_add_value (JNIEnv *jvm_env, /* {{{ */
691 value_t value, int ds_type,
692 jclass class_ptr, jobject object_ptr)
693 {
694 jmethodID m_addvalue;
695 jobject o_number;
697 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
698 "addValue", "(Ljava/lang/Number;)V");
699 if (m_addvalue == NULL)
700 {
701 ERROR ("java plugin: ctoj_value_list_add_value: "
702 "Cannot find method `void addValue (Number)'.");
703 return (-1);
704 }
706 o_number = ctoj_value_to_number (jvm_env, value, ds_type);
707 if (o_number == NULL)
708 {
709 ERROR ("java plugin: ctoj_value_list_add_value: "
710 "ctoj_value_to_number failed.");
711 return (-1);
712 }
714 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_addvalue, o_number);
716 (*jvm_env)->DeleteLocalRef (jvm_env, o_number);
718 return (0);
719 } /* }}} int ctoj_value_list_add_value */
721 static int ctoj_value_list_add_data_set (JNIEnv *jvm_env, /* {{{ */
722 jclass c_valuelist, jobject o_valuelist, const data_set_t *ds)
723 {
724 jmethodID m_setdataset;
725 jobject o_dataset;
727 /* Look for the `void setDataSource (List<DataSource> ds)' method. */
728 m_setdataset = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
729 "setDataSet", "(Lorg/collectd/api/DataSet;)V");
730 if (m_setdataset == NULL)
731 {
732 ERROR ("java plugin: ctoj_value_list_add_data_set: "
733 "Cannot find the `void setDataSet (DataSet)' method.");
734 return (-1);
735 }
737 /* Create a DataSet object. */
738 o_dataset = ctoj_data_set (jvm_env, ds);
739 if (o_dataset == NULL)
740 {
741 ERROR ("java plugin: ctoj_value_list_add_data_set: "
742 "ctoj_data_set (%s) failed.", ds->type);
743 return (-1);
744 }
746 /* Actually call the method. */
747 (*jvm_env)->CallVoidMethod (jvm_env,
748 o_valuelist, m_setdataset, o_dataset);
750 /* Decrease reference counter on the List<DataSource> object. */
751 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
753 return (0);
754 } /* }}} int ctoj_value_list_add_data_set */
756 /* Convert a value_list_t (and data_set_t) to a org/collectd/api/ValueList */
757 static jobject ctoj_value_list (JNIEnv *jvm_env, /* {{{ */
758 const data_set_t *ds, const value_list_t *vl)
759 {
760 jclass c_valuelist;
761 jmethodID m_valuelist_constructor;
762 jobject o_valuelist;
763 int status;
765 /* First, create a new ValueList instance..
766 * Look up the class.. */
767 c_valuelist = (*jvm_env)->FindClass (jvm_env,
768 "org/collectd/api/ValueList");
769 if (c_valuelist == NULL)
770 {
771 ERROR ("java plugin: ctoj_value_list: "
772 "FindClass (org/collectd/api/ValueList) failed.");
773 return (NULL);
774 }
776 /* Lookup the `ValueList ()' constructor. */
777 m_valuelist_constructor = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
778 "<init>", "()V");
779 if (m_valuelist_constructor == NULL)
780 {
781 ERROR ("java plugin: ctoj_value_list: Cannot find the "
782 "`ValueList ()' constructor.");
783 return (NULL);
784 }
786 /* Create a new instance. */
787 o_valuelist = (*jvm_env)->NewObject (jvm_env, c_valuelist,
788 m_valuelist_constructor);
789 if (o_valuelist == NULL)
790 {
791 ERROR ("java plugin: ctoj_value_list: Creating a new ValueList instance "
792 "failed.");
793 return (NULL);
794 }
796 status = ctoj_value_list_add_data_set (jvm_env,
797 c_valuelist, o_valuelist, ds);
798 if (status != 0)
799 {
800 ERROR ("java plugin: ctoj_value_list: "
801 "ctoj_value_list_add_data_set failed.");
802 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
803 return (NULL);
804 }
806 /* Set the strings.. */
807 #define SET_STRING(str,method_name) do { \
808 status = ctoj_string (jvm_env, str, \
809 c_valuelist, o_valuelist, method_name); \
810 if (status != 0) { \
811 ERROR ("java plugin: ctoj_value_list: ctoj_string (%s) failed.", \
812 method_name); \
813 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist); \
814 return (NULL); \
815 } } while (0)
817 SET_STRING (vl->host, "setHost");
818 SET_STRING (vl->plugin, "setPlugin");
819 SET_STRING (vl->plugin_instance, "setPluginInstance");
820 SET_STRING (vl->type, "setType");
821 SET_STRING (vl->type_instance, "setTypeInstance");
823 #undef SET_STRING
825 /* Set the `time' member. Java stores time in milliseconds. */
826 status = ctoj_long (jvm_env, (jlong) CDTIME_T_TO_MS (vl->time),
827 c_valuelist, o_valuelist, "setTime");
828 if (status != 0)
829 {
830 ERROR ("java plugin: ctoj_value_list: ctoj_long (setTime) failed.");
831 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
832 return (NULL);
833 }
835 /* Set the `interval' member.. */
836 status = ctoj_long (jvm_env,
837 (jlong) CDTIME_T_TO_MS (vl->interval),
838 c_valuelist, o_valuelist, "setInterval");
839 if (status != 0)
840 {
841 ERROR ("java plugin: ctoj_value_list: ctoj_long (setInterval) failed.");
842 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
843 return (NULL);
844 }
846 for (size_t i = 0; i < vl->values_len; i++)
847 {
848 status = ctoj_value_list_add_value (jvm_env, vl->values[i], ds->ds[i].type,
849 c_valuelist, o_valuelist);
850 if (status != 0)
851 {
852 ERROR ("java plugin: ctoj_value_list: "
853 "ctoj_value_list_add_value failed.");
854 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
855 return (NULL);
856 }
857 }
859 return (o_valuelist);
860 } /* }}} jobject ctoj_value_list */
862 /* Convert a notification_t to a org/collectd/api/Notification */
863 static jobject ctoj_notification (JNIEnv *jvm_env, /* {{{ */
864 const notification_t *n)
865 {
866 jclass c_notification;
867 jmethodID m_constructor;
868 jobject o_notification;
869 int status;
871 /* First, create a new Notification instance..
872 * Look up the class.. */
873 c_notification = (*jvm_env)->FindClass (jvm_env,
874 "org/collectd/api/Notification");
875 if (c_notification == NULL)
876 {
877 ERROR ("java plugin: ctoj_notification: "
878 "FindClass (org/collectd/api/Notification) failed.");
879 return (NULL);
880 }
882 /* Lookup the `Notification ()' constructor. */
883 m_constructor = (*jvm_env)->GetMethodID (jvm_env, c_notification,
884 "<init>", "()V");
885 if (m_constructor == NULL)
886 {
887 ERROR ("java plugin: ctoj_notification: Cannot find the "
888 "`Notification ()' constructor.");
889 return (NULL);
890 }
892 /* Create a new instance. */
893 o_notification = (*jvm_env)->NewObject (jvm_env, c_notification,
894 m_constructor);
895 if (o_notification == NULL)
896 {
897 ERROR ("java plugin: ctoj_notification: Creating a new Notification "
898 "instance failed.");
899 return (NULL);
900 }
902 /* Set the strings.. */
903 #define SET_STRING(str,method_name) do { \
904 status = ctoj_string (jvm_env, str, \
905 c_notification, o_notification, method_name); \
906 if (status != 0) { \
907 ERROR ("java plugin: ctoj_notification: ctoj_string (%s) failed.", \
908 method_name); \
909 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification); \
910 return (NULL); \
911 } } while (0)
913 SET_STRING (n->host, "setHost");
914 SET_STRING (n->plugin, "setPlugin");
915 SET_STRING (n->plugin_instance, "setPluginInstance");
916 SET_STRING (n->type, "setType");
917 SET_STRING (n->type_instance, "setTypeInstance");
918 SET_STRING (n->message, "setMessage");
920 #undef SET_STRING
922 /* Set the `time' member. Java stores time in milliseconds. */
923 status = ctoj_long (jvm_env, (jlong) CDTIME_T_TO_MS (n->time),
924 c_notification, o_notification, "setTime");
925 if (status != 0)
926 {
927 ERROR ("java plugin: ctoj_notification: ctoj_long (setTime) failed.");
928 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
929 return (NULL);
930 }
932 /* Set the `severity' member.. */
933 status = ctoj_int (jvm_env, (jint) n->severity,
934 c_notification, o_notification, "setSeverity");
935 if (status != 0)
936 {
937 ERROR ("java plugin: ctoj_notification: ctoj_int (setSeverity) failed.");
938 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
939 return (NULL);
940 }
942 return (o_notification);
943 } /* }}} jobject ctoj_notification */
945 /*
946 * Java to C conversion functions
947 */
948 /* Call a `String <method> ()' method. */
949 static int jtoc_string (JNIEnv *jvm_env, /* {{{ */
950 char *buffer, size_t buffer_size, int empty_okay,
951 jclass class_ptr, jobject object_ptr, const char *method_name)
952 {
953 jmethodID method_id;
954 jobject string_obj;
955 const char *c_str;
957 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
958 method_name, "()Ljava/lang/String;");
959 if (method_id == NULL)
960 {
961 ERROR ("java plugin: jtoc_string: Cannot find method `String %s ()'.",
962 method_name);
963 return (-1);
964 }
966 string_obj = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, method_id);
967 if ((string_obj == NULL) && (empty_okay == 0))
968 {
969 ERROR ("java plugin: jtoc_string: CallObjectMethod (%s) failed.",
970 method_name);
971 return (-1);
972 }
973 else if ((string_obj == NULL) && (empty_okay != 0))
974 {
975 memset (buffer, 0, buffer_size);
976 return (0);
977 }
979 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, string_obj, 0);
980 if (c_str == NULL)
981 {
982 ERROR ("java plugin: jtoc_string: GetStringUTFChars failed.");
983 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
984 return (-1);
985 }
987 sstrncpy (buffer, c_str, buffer_size);
989 (*jvm_env)->ReleaseStringUTFChars (jvm_env, string_obj, c_str);
990 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
992 return (0);
993 } /* }}} int jtoc_string */
995 /* Call an `int <method> ()' method. */
996 static int jtoc_int (JNIEnv *jvm_env, /* {{{ */
997 jint *ret_value,
998 jclass class_ptr, jobject object_ptr, const char *method_name)
999 {
1000 jmethodID method_id;
1002 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1003 method_name, "()I");
1004 if (method_id == NULL)
1005 {
1006 ERROR ("java plugin: jtoc_int: Cannot find method `int %s ()'.",
1007 method_name);
1008 return (-1);
1009 }
1011 *ret_value = (*jvm_env)->CallIntMethod (jvm_env, object_ptr, method_id);
1013 return (0);
1014 } /* }}} int jtoc_int */
1016 /* Call a `long <method> ()' method. */
1017 static int jtoc_long (JNIEnv *jvm_env, /* {{{ */
1018 jlong *ret_value,
1019 jclass class_ptr, jobject object_ptr, const char *method_name)
1020 {
1021 jmethodID method_id;
1023 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1024 method_name, "()J");
1025 if (method_id == NULL)
1026 {
1027 ERROR ("java plugin: jtoc_long: Cannot find method `long %s ()'.",
1028 method_name);
1029 return (-1);
1030 }
1032 *ret_value = (*jvm_env)->CallLongMethod (jvm_env, object_ptr, method_id);
1034 return (0);
1035 } /* }}} int jtoc_long */
1037 /* Call a `double <method> ()' method. */
1038 static int jtoc_double (JNIEnv *jvm_env, /* {{{ */
1039 jdouble *ret_value,
1040 jclass class_ptr, jobject object_ptr, const char *method_name)
1041 {
1042 jmethodID method_id;
1044 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1045 method_name, "()D");
1046 if (method_id == NULL)
1047 {
1048 ERROR ("java plugin: jtoc_double: Cannot find method `double %s ()'.",
1049 method_name);
1050 return (-1);
1051 }
1053 *ret_value = (*jvm_env)->CallDoubleMethod (jvm_env, object_ptr, method_id);
1055 return (0);
1056 } /* }}} int jtoc_double */
1058 static int jtoc_value (JNIEnv *jvm_env, /* {{{ */
1059 value_t *ret_value, int ds_type, jobject object_ptr)
1060 {
1061 jclass class_ptr;
1062 int status;
1064 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1066 if (ds_type == DS_TYPE_GAUGE)
1067 {
1068 jdouble tmp_double;
1070 status = jtoc_double (jvm_env, &tmp_double,
1071 class_ptr, object_ptr, "doubleValue");
1072 if (status != 0)
1073 {
1074 ERROR ("java plugin: jtoc_value: "
1075 "jtoc_double failed.");
1076 return (-1);
1077 }
1078 (*ret_value).gauge = (gauge_t) tmp_double;
1079 }
1080 else
1081 {
1082 jlong tmp_long;
1084 status = jtoc_long (jvm_env, &tmp_long,
1085 class_ptr, object_ptr, "longValue");
1086 if (status != 0)
1087 {
1088 ERROR ("java plugin: jtoc_value: "
1089 "jtoc_long failed.");
1090 return (-1);
1091 }
1093 if (ds_type == DS_TYPE_DERIVE)
1094 (*ret_value).derive = (derive_t) tmp_long;
1095 else if (ds_type == DS_TYPE_ABSOLUTE)
1096 (*ret_value).absolute = (absolute_t) tmp_long;
1097 else
1098 (*ret_value).counter = (counter_t) tmp_long;
1099 }
1101 return (0);
1102 } /* }}} int jtoc_value */
1104 /* Read a List<Number>, convert it to `value_t' and add it to the given
1105 * `value_list_t'. */
1106 static int jtoc_values_array (JNIEnv *jvm_env, /* {{{ */
1107 const data_set_t *ds, value_list_t *vl,
1108 jclass class_ptr, jobject object_ptr)
1109 {
1110 jmethodID m_getvalues;
1111 jmethodID m_toarray;
1112 jobject o_list;
1113 jobjectArray o_number_array;
1115 value_t *values;
1116 int values_num;
1118 values_num = ds->ds_num;
1120 values = NULL;
1121 o_number_array = NULL;
1122 o_list = NULL;
1124 #define BAIL_OUT(status) \
1125 free (values); \
1126 if (o_number_array != NULL) \
1127 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array); \
1128 if (o_list != NULL) \
1129 (*jvm_env)->DeleteLocalRef (jvm_env, o_list); \
1130 return (status);
1132 /* Call: List<Number> ValueList.getValues () */
1133 m_getvalues = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
1134 "getValues", "()Ljava/util/List;");
1135 if (m_getvalues == NULL)
1136 {
1137 ERROR ("java plugin: jtoc_values_array: "
1138 "Cannot find method `List getValues ()'.");
1139 BAIL_OUT (-1);
1140 }
1142 o_list = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, m_getvalues);
1143 if (o_list == NULL)
1144 {
1145 ERROR ("java plugin: jtoc_values_array: "
1146 "CallObjectMethod (getValues) failed.");
1147 BAIL_OUT (-1);
1148 }
1150 /* Call: Number[] List.toArray () */
1151 m_toarray = (*jvm_env)->GetMethodID (jvm_env,
1152 (*jvm_env)->GetObjectClass (jvm_env, o_list),
1153 "toArray", "()[Ljava/lang/Object;");
1154 if (m_toarray == NULL)
1155 {
1156 ERROR ("java plugin: jtoc_values_array: "
1157 "Cannot find method `Object[] toArray ()'.");
1158 BAIL_OUT (-1);
1159 }
1161 o_number_array = (*jvm_env)->CallObjectMethod (jvm_env, o_list, m_toarray);
1162 if (o_number_array == NULL)
1163 {
1164 ERROR ("java plugin: jtoc_values_array: "
1165 "CallObjectMethod (toArray) failed.");
1166 BAIL_OUT (-1);
1167 }
1169 values = (value_t *) calloc (values_num, sizeof (value_t));
1170 if (values == NULL)
1171 {
1172 ERROR ("java plugin: jtoc_values_array: calloc failed.");
1173 BAIL_OUT (-1);
1174 }
1176 for (int i = 0; i < values_num; i++)
1177 {
1178 jobject o_number;
1179 int status;
1181 o_number = (*jvm_env)->GetObjectArrayElement (jvm_env,
1182 o_number_array, (jsize) i);
1183 if (o_number == NULL)
1184 {
1185 ERROR ("java plugin: jtoc_values_array: "
1186 "GetObjectArrayElement (%i) failed.", i);
1187 BAIL_OUT (-1);
1188 }
1190 status = jtoc_value (jvm_env, values + i, ds->ds[i].type, o_number);
1191 if (status != 0)
1192 {
1193 ERROR ("java plugin: jtoc_values_array: "
1194 "jtoc_value (%i) failed.", i);
1195 BAIL_OUT (-1);
1196 }
1197 } /* for (i = 0; i < values_num; i++) */
1199 vl->values = values;
1200 vl->values_len = values_num;
1202 #undef BAIL_OUT
1203 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array);
1204 (*jvm_env)->DeleteLocalRef (jvm_env, o_list);
1205 return (0);
1206 } /* }}} int jtoc_values_array */
1208 /* Convert a org/collectd/api/ValueList to a value_list_t. */
1209 static int jtoc_value_list (JNIEnv *jvm_env, value_list_t *vl, /* {{{ */
1210 jobject object_ptr)
1211 {
1212 jclass class_ptr;
1213 int status;
1214 jlong tmp_long;
1215 const data_set_t *ds;
1217 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1218 if (class_ptr == NULL)
1219 {
1220 ERROR ("java plugin: jtoc_value_list: GetObjectClass failed.");
1221 return (-1);
1222 }
1224 /* eo == empty okay */
1225 #define SET_STRING(buffer,method, eo) do { \
1226 status = jtoc_string (jvm_env, buffer, sizeof (buffer), eo, \
1227 class_ptr, object_ptr, method); \
1228 if (status != 0) { \
1229 ERROR ("java plugin: jtoc_value_list: jtoc_string (%s) failed.", \
1230 method); \
1231 return (-1); \
1232 } } while (0)
1234 SET_STRING(vl->type, "getType", /* empty = */ 0);
1236 ds = plugin_get_ds (vl->type);
1237 if (ds == NULL)
1238 {
1239 ERROR ("java plugin: jtoc_value_list: Data-set `%s' is not defined. "
1240 "Please consult the types.db(5) manpage for mor information.",
1241 vl->type);
1242 return (-1);
1243 }
1245 SET_STRING(vl->host, "getHost", /* empty = */ 0);
1246 SET_STRING(vl->plugin, "getPlugin", /* empty = */ 0);
1247 SET_STRING(vl->plugin_instance, "getPluginInstance", /* empty = */ 1);
1248 SET_STRING(vl->type_instance, "getTypeInstance", /* empty = */ 1);
1250 #undef SET_STRING
1252 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1253 if (status != 0)
1254 {
1255 ERROR ("java plugin: jtoc_value_list: jtoc_long (getTime) failed.");
1256 return (-1);
1257 }
1258 /* Java measures time in milliseconds. */
1259 vl->time = MS_TO_CDTIME_T (tmp_long);
1261 status = jtoc_long (jvm_env, &tmp_long,
1262 class_ptr, object_ptr, "getInterval");
1263 if (status != 0)
1264 {
1265 ERROR ("java plugin: jtoc_value_list: jtoc_long (getInterval) failed.");
1266 return (-1);
1267 }
1268 vl->interval = MS_TO_CDTIME_T (tmp_long);
1270 status = jtoc_values_array (jvm_env, ds, vl, class_ptr, object_ptr);
1271 if (status != 0)
1272 {
1273 ERROR ("java plugin: jtoc_value_list: jtoc_values_array failed.");
1274 return (-1);
1275 }
1277 return (0);
1278 } /* }}} int jtoc_value_list */
1280 /* Convert a org/collectd/api/Notification to a notification_t. */
1281 static int jtoc_notification (JNIEnv *jvm_env, notification_t *n, /* {{{ */
1282 jobject object_ptr)
1283 {
1284 jclass class_ptr;
1285 int status;
1286 jlong tmp_long;
1287 jint tmp_int;
1289 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1290 if (class_ptr == NULL)
1291 {
1292 ERROR ("java plugin: jtoc_notification: GetObjectClass failed.");
1293 return (-1);
1294 }
1296 /* eo == empty okay */
1297 #define SET_STRING(buffer,method, eo) do { \
1298 status = jtoc_string (jvm_env, buffer, sizeof (buffer), eo, \
1299 class_ptr, object_ptr, method); \
1300 if (status != 0) { \
1301 ERROR ("java plugin: jtoc_notification: jtoc_string (%s) failed.", \
1302 method); \
1303 return (-1); \
1304 } } while (0)
1306 SET_STRING (n->host, "getHost", /* empty = */ 1);
1307 SET_STRING (n->plugin, "getPlugin", /* empty = */ 1);
1308 SET_STRING (n->plugin_instance, "getPluginInstance", /* empty = */ 1);
1309 SET_STRING (n->type, "getType", /* empty = */ 1);
1310 SET_STRING (n->type_instance, "getTypeInstance", /* empty = */ 1);
1311 SET_STRING (n->message, "getMessage", /* empty = */ 0);
1313 #undef SET_STRING
1315 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1316 if (status != 0)
1317 {
1318 ERROR ("java plugin: jtoc_notification: jtoc_long (getTime) failed.");
1319 return (-1);
1320 }
1321 /* Java measures time in milliseconds. */
1322 n->time = MS_TO_CDTIME_T(tmp_long);
1324 status = jtoc_int (jvm_env, &tmp_int,
1325 class_ptr, object_ptr, "getSeverity");
1326 if (status != 0)
1327 {
1328 ERROR ("java plugin: jtoc_notification: jtoc_int (getSeverity) failed.");
1329 return (-1);
1330 }
1331 n->severity = (int) tmp_int;
1333 return (0);
1334 } /* }}} int jtoc_notification */
1335 /*
1336 * Functions accessible from Java
1337 */
1338 static jint JNICALL cjni_api_dispatch_values (JNIEnv *jvm_env, /* {{{ */
1339 jobject this, jobject java_vl)
1340 {
1341 value_list_t vl = VALUE_LIST_INIT;
1342 int status;
1344 DEBUG ("cjni_api_dispatch_values: java_vl = %p;", (void *) java_vl);
1346 status = jtoc_value_list (jvm_env, &vl, java_vl);
1347 if (status != 0)
1348 {
1349 ERROR ("java plugin: cjni_api_dispatch_values: jtoc_value_list failed.");
1350 return (-1);
1351 }
1353 status = plugin_dispatch_values (&vl);
1355 sfree (vl.values);
1357 return (status);
1358 } /* }}} jint cjni_api_dispatch_values */
1360 static jint JNICALL cjni_api_dispatch_notification (JNIEnv *jvm_env, /* {{{ */
1361 jobject this, jobject o_notification)
1362 {
1363 notification_t n = { 0 };
1364 int status;
1366 status = jtoc_notification (jvm_env, &n, o_notification);
1367 if (status != 0)
1368 {
1369 ERROR ("java plugin: cjni_api_dispatch_notification: jtoc_notification failed.");
1370 return (-1);
1371 }
1373 status = plugin_dispatch_notification (&n);
1375 return (status);
1376 } /* }}} jint cjni_api_dispatch_notification */
1378 static jobject JNICALL cjni_api_get_ds (JNIEnv *jvm_env, /* {{{ */
1379 jobject this, jobject o_string_type)
1380 {
1381 const char *ds_name;
1382 const data_set_t *ds;
1383 jobject o_dataset;
1385 ds_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_string_type, 0);
1386 if (ds_name == NULL)
1387 {
1388 ERROR ("java plugin: cjni_api_get_ds: GetStringUTFChars failed.");
1389 return (NULL);
1390 }
1392 ds = plugin_get_ds (ds_name);
1393 DEBUG ("java plugin: cjni_api_get_ds: "
1394 "plugin_get_ds (%s) = %p;", ds_name, (void *) ds);
1396 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_string_type, ds_name);
1398 if (ds == NULL)
1399 return (NULL);
1401 o_dataset = ctoj_data_set (jvm_env, ds);
1402 return (o_dataset);
1403 } /* }}} jint cjni_api_get_ds */
1405 static jint JNICALL cjni_api_register_config (JNIEnv *jvm_env, /* {{{ */
1406 jobject this, jobject o_name, jobject o_config)
1407 {
1408 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_CONFIG));
1409 } /* }}} jint cjni_api_register_config */
1411 static jint JNICALL cjni_api_register_init (JNIEnv *jvm_env, /* {{{ */
1412 jobject this, jobject o_name, jobject o_config)
1413 {
1414 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_INIT));
1415 } /* }}} jint cjni_api_register_init */
1417 static jint JNICALL cjni_api_register_read (JNIEnv *jvm_env, /* {{{ */
1418 jobject this, jobject o_name, jobject o_read)
1419 {
1420 user_data_t ud = { 0 };
1421 cjni_callback_info_t *cbi;
1423 cbi = cjni_callback_info_create (jvm_env, o_name, o_read, CB_TYPE_READ);
1424 if (cbi == NULL)
1425 return (-1);
1427 DEBUG ("java plugin: Registering new read callback: %s", cbi->name);
1429 ud.data = (void *) cbi;
1430 ud.free_func = cjni_callback_info_destroy;
1432 plugin_register_complex_read (/* group = */ NULL, cbi->name, cjni_read,
1433 /* interval = */ 0, &ud);
1435 (*jvm_env)->DeleteLocalRef (jvm_env, o_read);
1437 return (0);
1438 } /* }}} jint cjni_api_register_read */
1440 static jint JNICALL cjni_api_register_write (JNIEnv *jvm_env, /* {{{ */
1441 jobject this, jobject o_name, jobject o_write)
1442 {
1443 user_data_t ud = { 0 };
1444 cjni_callback_info_t *cbi;
1446 cbi = cjni_callback_info_create (jvm_env, o_name, o_write, CB_TYPE_WRITE);
1447 if (cbi == NULL)
1448 return (-1);
1450 DEBUG ("java plugin: Registering new write callback: %s", cbi->name);
1452 ud.data = (void *) cbi;
1453 ud.free_func = cjni_callback_info_destroy;
1455 plugin_register_write (cbi->name, cjni_write, &ud);
1457 (*jvm_env)->DeleteLocalRef (jvm_env, o_write);
1459 return (0);
1460 } /* }}} jint cjni_api_register_write */
1462 static jint JNICALL cjni_api_register_flush (JNIEnv *jvm_env, /* {{{ */
1463 jobject this, jobject o_name, jobject o_flush)
1464 {
1465 user_data_t ud = { 0 };
1466 cjni_callback_info_t *cbi;
1468 cbi = cjni_callback_info_create (jvm_env, o_name, o_flush, CB_TYPE_FLUSH);
1469 if (cbi == NULL)
1470 return (-1);
1472 DEBUG ("java plugin: Registering new flush callback: %s", cbi->name);
1474 ud.data = (void *) cbi;
1475 ud.free_func = cjni_callback_info_destroy;
1477 plugin_register_flush (cbi->name, cjni_flush, &ud);
1479 (*jvm_env)->DeleteLocalRef (jvm_env, o_flush);
1481 return (0);
1482 } /* }}} jint cjni_api_register_flush */
1484 static jint JNICALL cjni_api_register_shutdown (JNIEnv *jvm_env, /* {{{ */
1485 jobject this, jobject o_name, jobject o_shutdown)
1486 {
1487 return (cjni_callback_register (jvm_env, o_name, o_shutdown,
1488 CB_TYPE_SHUTDOWN));
1489 } /* }}} jint cjni_api_register_shutdown */
1491 static jint JNICALL cjni_api_register_log (JNIEnv *jvm_env, /* {{{ */
1492 jobject this, jobject o_name, jobject o_log)
1493 {
1494 user_data_t ud = { 0 };
1495 cjni_callback_info_t *cbi;
1497 cbi = cjni_callback_info_create (jvm_env, o_name, o_log, CB_TYPE_LOG);
1498 if (cbi == NULL)
1499 return (-1);
1501 DEBUG ("java plugin: Registering new log callback: %s", cbi->name);
1503 ud.data = (void *) cbi;
1504 ud.free_func = cjni_callback_info_destroy;
1506 plugin_register_log (cbi->name, cjni_log, &ud);
1508 (*jvm_env)->DeleteLocalRef (jvm_env, o_log);
1510 return (0);
1511 } /* }}} jint cjni_api_register_log */
1513 static jint JNICALL cjni_api_register_notification (JNIEnv *jvm_env, /* {{{ */
1514 jobject this, jobject o_name, jobject o_notification)
1515 {
1516 user_data_t ud = { 0 };
1517 cjni_callback_info_t *cbi;
1519 cbi = cjni_callback_info_create (jvm_env, o_name, o_notification,
1520 CB_TYPE_NOTIFICATION);
1521 if (cbi == NULL)
1522 return (-1);
1524 DEBUG ("java plugin: Registering new notification callback: %s", cbi->name);
1526 ud.data = (void *) cbi;
1527 ud.free_func = cjni_callback_info_destroy;
1529 plugin_register_notification (cbi->name, cjni_notification, &ud);
1531 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
1533 return (0);
1534 } /* }}} jint cjni_api_register_notification */
1536 static jint JNICALL cjni_api_register_match_target (JNIEnv *jvm_env, /* {{{ */
1537 jobject this, jobject o_name, jobject o_match, int type)
1538 {
1539 int status;
1540 const char *c_name;
1542 c_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_name, 0);
1543 if (c_name == NULL)
1544 {
1545 ERROR ("java plugin: cjni_api_register_match_target: "
1546 "GetStringUTFChars failed.");
1547 return (-1);
1548 }
1550 status = cjni_callback_register (jvm_env, o_name, o_match, type);
1551 if (status != 0)
1552 {
1553 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1554 return (-1);
1555 }
1557 if (type == CB_TYPE_MATCH)
1558 {
1559 match_proc_t m_proc = { 0 };
1561 m_proc.create = cjni_match_target_create;
1562 m_proc.destroy = cjni_match_target_destroy;
1563 m_proc.match = (void *) cjni_match_target_invoke;
1565 status = fc_register_match (c_name, m_proc);
1566 }
1567 else if (type == CB_TYPE_TARGET)
1568 {
1569 target_proc_t t_proc = { 0 };
1571 t_proc.create = cjni_match_target_create;
1572 t_proc.destroy = cjni_match_target_destroy;
1573 t_proc.invoke = cjni_match_target_invoke;
1575 status = fc_register_target (c_name, t_proc);
1576 }
1577 else
1578 {
1579 ERROR ("java plugin: cjni_api_register_match_target: "
1580 "Don't know whether to create a match or a target.");
1581 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1582 return (-1);
1583 }
1585 if (status != 0)
1586 {
1587 ERROR ("java plugin: cjni_api_register_match_target: "
1588 "%s failed.",
1589 (type == CB_TYPE_MATCH) ? "fc_register_match" : "fc_register_target");
1590 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1591 return (-1);
1592 }
1594 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1596 return (0);
1597 } /* }}} jint cjni_api_register_match_target */
1599 static jint JNICALL cjni_api_register_match (JNIEnv *jvm_env, /* {{{ */
1600 jobject this, jobject o_name, jobject o_match)
1601 {
1602 return (cjni_api_register_match_target (jvm_env, this, o_name, o_match,
1603 CB_TYPE_MATCH));
1604 } /* }}} jint cjni_api_register_match */
1606 static jint JNICALL cjni_api_register_target (JNIEnv *jvm_env, /* {{{ */
1607 jobject this, jobject o_name, jobject o_target)
1608 {
1609 return (cjni_api_register_match_target (jvm_env, this, o_name, o_target,
1610 CB_TYPE_TARGET));
1611 } /* }}} jint cjni_api_register_target */
1613 static void JNICALL cjni_api_log (JNIEnv *jvm_env, /* {{{ */
1614 jobject this, jint severity, jobject o_message)
1615 {
1616 const char *c_str;
1618 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, o_message, 0);
1619 if (c_str == NULL)
1620 {
1621 ERROR ("java plugin: cjni_api_log: GetStringUTFChars failed.");
1622 return;
1623 }
1625 if (severity < LOG_ERR)
1626 severity = LOG_ERR;
1627 if (severity > LOG_DEBUG)
1628 severity = LOG_DEBUG;
1630 plugin_log (severity, "%s", c_str);
1632 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_message, c_str);
1633 } /* }}} void cjni_api_log */
1635 static jstring JNICALL cjni_api_get_hostname (JNIEnv *jvm_env, jobject this)
1636 {
1637 return ctoj_output_string(jvm_env, hostname_g);
1638 }
1640 /* List of ``native'' functions, i. e. C-functions that can be called from
1641 * Java. */
1642 static JNINativeMethod jni_api_functions[] = /* {{{ */
1643 {
1644 { "dispatchValues",
1645 "(Lorg/collectd/api/ValueList;)I",
1646 cjni_api_dispatch_values },
1648 { "dispatchNotification",
1649 "(Lorg/collectd/api/Notification;)I",
1650 cjni_api_dispatch_notification },
1652 { "getDS",
1653 "(Ljava/lang/String;)Lorg/collectd/api/DataSet;",
1654 cjni_api_get_ds },
1656 { "registerConfig",
1657 "(Ljava/lang/String;Lorg/collectd/api/CollectdConfigInterface;)I",
1658 cjni_api_register_config },
1660 { "registerInit",
1661 "(Ljava/lang/String;Lorg/collectd/api/CollectdInitInterface;)I",
1662 cjni_api_register_init },
1664 { "registerRead",
1665 "(Ljava/lang/String;Lorg/collectd/api/CollectdReadInterface;)I",
1666 cjni_api_register_read },
1668 { "registerWrite",
1669 "(Ljava/lang/String;Lorg/collectd/api/CollectdWriteInterface;)I",
1670 cjni_api_register_write },
1672 { "registerFlush",
1673 "(Ljava/lang/String;Lorg/collectd/api/CollectdFlushInterface;)I",
1674 cjni_api_register_flush },
1676 { "registerShutdown",
1677 "(Ljava/lang/String;Lorg/collectd/api/CollectdShutdownInterface;)I",
1678 cjni_api_register_shutdown },
1680 { "registerLog",
1681 "(Ljava/lang/String;Lorg/collectd/api/CollectdLogInterface;)I",
1682 cjni_api_register_log },
1684 { "registerNotification",
1685 "(Ljava/lang/String;Lorg/collectd/api/CollectdNotificationInterface;)I",
1686 cjni_api_register_notification },
1688 { "registerMatch",
1689 "(Ljava/lang/String;Lorg/collectd/api/CollectdMatchFactoryInterface;)I",
1690 cjni_api_register_match },
1692 { "registerTarget",
1693 "(Ljava/lang/String;Lorg/collectd/api/CollectdTargetFactoryInterface;)I",
1694 cjni_api_register_target },
1696 { "log",
1697 "(ILjava/lang/String;)V",
1698 cjni_api_log },
1700 { "getHostname",
1701 "()Ljava/lang/String;",
1702 cjni_api_get_hostname },
1704 };
1705 static size_t jni_api_functions_num = sizeof (jni_api_functions)
1706 / sizeof (jni_api_functions[0]);
1707 /* }}} */
1709 /*
1710 * Functions
1711 */
1712 /* Allocate a `cjni_callback_info_t' given the type and objects necessary for
1713 * all registration functions. */
1714 static cjni_callback_info_t *cjni_callback_info_create (JNIEnv *jvm_env, /* {{{ */
1715 jobject o_name, jobject o_callback, int type)
1716 {
1717 const char *c_name;
1718 cjni_callback_info_t *cbi;
1719 const char *method_name;
1720 const char *method_signature;
1722 switch (type)
1723 {
1724 case CB_TYPE_CONFIG:
1725 method_name = "config";
1726 method_signature = "(Lorg/collectd/api/OConfigItem;)I";
1727 break;
1729 case CB_TYPE_INIT:
1730 method_name = "init";
1731 method_signature = "()I";
1732 break;
1734 case CB_TYPE_READ:
1735 method_name = "read";
1736 method_signature = "()I";
1737 break;
1739 case CB_TYPE_WRITE:
1740 method_name = "write";
1741 method_signature = "(Lorg/collectd/api/ValueList;)I";
1742 break;
1744 case CB_TYPE_FLUSH:
1745 method_name = "flush";
1746 method_signature = "(Ljava/lang/Number;Ljava/lang/String;)I";
1747 break;
1749 case CB_TYPE_SHUTDOWN:
1750 method_name = "shutdown";
1751 method_signature = "()I";
1752 break;
1754 case CB_TYPE_LOG:
1755 method_name = "log";
1756 method_signature = "(ILjava/lang/String;)V";
1757 break;
1759 case CB_TYPE_NOTIFICATION:
1760 method_name = "notification";
1761 method_signature = "(Lorg/collectd/api/Notification;)I";
1762 break;
1764 case CB_TYPE_MATCH:
1765 method_name = "createMatch";
1766 method_signature = "(Lorg/collectd/api/OConfigItem;)"
1767 "Lorg/collectd/api/CollectdMatchInterface;";
1768 break;
1770 case CB_TYPE_TARGET:
1771 method_name = "createTarget";
1772 method_signature = "(Lorg/collectd/api/OConfigItem;)"
1773 "Lorg/collectd/api/CollectdTargetInterface;";
1774 break;
1776 default:
1777 ERROR ("java plugin: cjni_callback_info_create: Unknown type: %#x",
1778 type);
1779 return (NULL);
1780 }
1782 c_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_name, 0);
1783 if (c_name == NULL)
1784 {
1785 ERROR ("java plugin: cjni_callback_info_create: "
1786 "GetStringUTFChars failed.");
1787 return (NULL);
1788 }
1790 cbi = calloc (1, sizeof (*cbi));
1791 if (cbi == NULL)
1792 {
1793 ERROR ("java plugin: cjni_callback_info_create: calloc failed.");
1794 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1795 return (NULL);
1796 }
1797 cbi->type = type;
1799 cbi->name = strdup (c_name);
1800 if (cbi->name == NULL)
1801 {
1802 pthread_mutex_unlock (&java_callbacks_lock);
1803 ERROR ("java plugin: cjni_callback_info_create: strdup failed.");
1804 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1805 sfree (cbi);
1806 return (NULL);
1807 }
1809 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1811 cbi->object = (*jvm_env)->NewGlobalRef (jvm_env, o_callback);
1812 if (cbi->object == NULL)
1813 {
1814 ERROR ("java plugin: cjni_callback_info_create: NewGlobalRef failed.");
1815 sfree (cbi->name);
1816 sfree (cbi);
1817 return (NULL);
1818 }
1820 cbi->class = (*jvm_env)->GetObjectClass (jvm_env, cbi->object);
1821 if (cbi->class == NULL)
1822 {
1823 ERROR ("java plugin: cjni_callback_info_create: GetObjectClass failed.");
1824 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1825 sfree (cbi->name);
1826 sfree (cbi);
1827 return (NULL);
1828 }
1830 cbi->method = (*jvm_env)->GetMethodID (jvm_env, cbi->class,
1831 method_name, method_signature);
1832 if (cbi->method == NULL)
1833 {
1834 ERROR ("java plugin: cjni_callback_info_create: "
1835 "Cannot find the `%s' method with signature `%s'.",
1836 method_name, method_signature);
1837 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1838 sfree (cbi->name);
1839 sfree (cbi);
1840 return (NULL);
1841 }
1843 return (cbi);
1844 } /* }}} cjni_callback_info_t cjni_callback_info_create */
1846 /* Allocate a `cjni_callback_info_t' via `cjni_callback_info_create' and add it
1847 * to the global `java_callbacks' variable. This is used for `config', `init',
1848 * and `shutdown' callbacks. */
1849 static int cjni_callback_register (JNIEnv *jvm_env, /* {{{ */
1850 jobject o_name, jobject o_callback, int type)
1851 {
1852 cjni_callback_info_t *cbi;
1853 cjni_callback_info_t *tmp;
1854 #if COLLECT_DEBUG
1855 const char *type_str;
1856 #endif
1858 cbi = cjni_callback_info_create (jvm_env, o_name, o_callback, type);
1859 if (cbi == NULL)
1860 return (-1);
1862 #if COLLECT_DEBUG
1863 switch (type)
1864 {
1865 case CB_TYPE_CONFIG:
1866 type_str = "config";
1867 break;
1869 case CB_TYPE_INIT:
1870 type_str = "init";
1871 break;
1873 case CB_TYPE_SHUTDOWN:
1874 type_str = "shutdown";
1875 break;
1877 case CB_TYPE_MATCH:
1878 type_str = "match";
1879 break;
1881 case CB_TYPE_TARGET:
1882 type_str = "target";
1883 break;
1885 default:
1886 type_str = "<unknown>";
1887 }
1888 DEBUG ("java plugin: Registering new %s callback: %s",
1889 type_str, cbi->name);
1890 #endif
1892 pthread_mutex_lock (&java_callbacks_lock);
1894 tmp = realloc (java_callbacks,
1895 (java_callbacks_num + 1) * sizeof (*java_callbacks));
1896 if (tmp == NULL)
1897 {
1898 pthread_mutex_unlock (&java_callbacks_lock);
1899 ERROR ("java plugin: cjni_callback_register: realloc failed.");
1901 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1902 free (cbi);
1904 return (-1);
1905 }
1906 java_callbacks = tmp;
1907 java_callbacks[java_callbacks_num] = *cbi;
1908 java_callbacks_num++;
1910 pthread_mutex_unlock (&java_callbacks_lock);
1912 free (cbi);
1913 return (0);
1914 } /* }}} int cjni_callback_register */
1916 /* Callback for `pthread_key_create'. It frees the data contained in
1917 * `jvm_env_key' and prints a warning if the reference counter is not zero. */
1918 static void cjni_jvm_env_destroy (void *args) /* {{{ */
1919 {
1920 cjni_jvm_env_t *cjni_env;
1922 if (args == NULL)
1923 return;
1925 cjni_env = (cjni_jvm_env_t *) args;
1927 if (cjni_env->reference_counter > 0)
1928 {
1929 ERROR ("java plugin: cjni_jvm_env_destroy: "
1930 "cjni_env->reference_counter = %i;", cjni_env->reference_counter);
1931 }
1933 if (cjni_env->jvm_env != NULL)
1934 {
1935 ERROR ("java plugin: cjni_jvm_env_destroy: cjni_env->jvm_env = %p;",
1936 (void *) cjni_env->jvm_env);
1937 }
1939 /* The pointer is allocated in `cjni_thread_attach' */
1940 free (cjni_env);
1941 } /* }}} void cjni_jvm_env_destroy */
1943 /* Register ``native'' functions with the JVM. Native functions are C-functions
1944 * that can be called by Java code. */
1945 static int cjni_init_native (JNIEnv *jvm_env) /* {{{ */
1946 {
1947 jclass api_class_ptr;
1948 int status;
1950 api_class_ptr = (*jvm_env)->FindClass (jvm_env, "org/collectd/api/Collectd");
1951 if (api_class_ptr == NULL)
1952 {
1953 ERROR ("cjni_init_native: Cannot find the API class \"org.collectd.api"
1954 ".Collectd\". Please set the correct class path "
1955 "using 'JVMArg \"-Djava.class.path=...\"'.");
1956 return (-1);
1957 }
1959 status = (*jvm_env)->RegisterNatives (jvm_env, api_class_ptr,
1960 jni_api_functions, (jint) jni_api_functions_num);
1961 if (status != 0)
1962 {
1963 ERROR ("cjni_init_native: RegisterNatives failed with status %i.", status);
1964 return (-1);
1965 }
1967 return (0);
1968 } /* }}} int cjni_init_native */
1970 /* Create the JVM. This is called when the first thread tries to access the JVM
1971 * via cjni_thread_attach. */
1972 static int cjni_create_jvm (void) /* {{{ */
1973 {
1974 JNIEnv *jvm_env;
1975 JavaVMInitArgs vm_args = { 0 };
1976 JavaVMOption vm_options[jvm_argc];
1978 int status;
1980 if (jvm != NULL)
1981 return (0);
1983 status = pthread_key_create (&jvm_env_key, cjni_jvm_env_destroy);
1984 if (status != 0)
1985 {
1986 ERROR ("java plugin: cjni_create_jvm: pthread_key_create failed "
1987 "with status %i.", status);
1988 return (-1);
1989 }
1991 jvm_env = NULL;
1993 vm_args.version = JNI_VERSION_1_2;
1994 vm_args.options = vm_options;
1995 vm_args.nOptions = (jint) jvm_argc;
1997 for (size_t i = 0; i < jvm_argc; i++)
1998 {
1999 DEBUG ("java plugin: cjni_create_jvm: jvm_argv[%zu] = %s",
2000 i, jvm_argv[i]);
2001 vm_args.options[i].optionString = jvm_argv[i];
2002 }
2004 status = JNI_CreateJavaVM (&jvm, (void *) &jvm_env, (void *) &vm_args);
2005 if (status != 0)
2006 {
2007 ERROR ("java plugin: cjni_create_jvm: "
2008 "JNI_CreateJavaVM failed with status %i.",
2009 status);
2010 return (-1);
2011 }
2012 assert (jvm != NULL);
2013 assert (jvm_env != NULL);
2015 /* Call RegisterNatives */
2016 status = cjni_init_native (jvm_env);
2017 if (status != 0)
2018 {
2019 ERROR ("java plugin: cjni_create_jvm: cjni_init_native failed.");
2020 return (-1);
2021 }
2023 DEBUG ("java plugin: The JVM has been created.");
2024 return (0);
2025 } /* }}} int cjni_create_jvm */
2027 /* Increase the reference counter to the JVM for this thread. If it was zero,
2028 * attach the JVM first. */
2029 static JNIEnv *cjni_thread_attach (void) /* {{{ */
2030 {
2031 cjni_jvm_env_t *cjni_env;
2032 JNIEnv *jvm_env;
2034 /* If we're the first thread to access the JVM, we'll have to create it
2035 * first.. */
2036 if (jvm == NULL)
2037 {
2038 int status;
2040 status = cjni_create_jvm ();
2041 if (status != 0)
2042 {
2043 ERROR ("java plugin: cjni_thread_attach: cjni_create_jvm failed.");
2044 return (NULL);
2045 }
2046 }
2047 assert (jvm != NULL);
2049 cjni_env = pthread_getspecific (jvm_env_key);
2050 if (cjni_env == NULL)
2051 {
2052 /* This pointer is free'd in `cjni_jvm_env_destroy'. */
2053 cjni_env = calloc (1, sizeof (*cjni_env));
2054 if (cjni_env == NULL)
2055 {
2056 ERROR ("java plugin: cjni_thread_attach: calloc failed.");
2057 return (NULL);
2058 }
2059 cjni_env->reference_counter = 0;
2060 cjni_env->jvm_env = NULL;
2062 pthread_setspecific (jvm_env_key, cjni_env);
2063 }
2065 if (cjni_env->reference_counter > 0)
2066 {
2067 cjni_env->reference_counter++;
2068 jvm_env = cjni_env->jvm_env;
2069 }
2070 else
2071 {
2072 int status;
2073 JavaVMAttachArgs args = { 0 };
2075 assert (cjni_env->jvm_env == NULL);
2077 args.version = JNI_VERSION_1_2;
2079 status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, (void *) &args);
2080 if (status != 0)
2081 {
2082 ERROR ("java plugin: cjni_thread_attach: AttachCurrentThread failed "
2083 "with status %i.", status);
2084 return (NULL);
2085 }
2087 cjni_env->reference_counter = 1;
2088 cjni_env->jvm_env = jvm_env;
2089 }
2091 DEBUG ("java plugin: cjni_thread_attach: cjni_env->reference_counter = %i",
2092 cjni_env->reference_counter);
2093 assert (jvm_env != NULL);
2094 return (jvm_env);
2095 } /* }}} JNIEnv *cjni_thread_attach */
2097 /* Decrease the reference counter of this thread. If it reaches zero, detach
2098 * from the JVM. */
2099 static int cjni_thread_detach (void) /* {{{ */
2100 {
2101 cjni_jvm_env_t *cjni_env;
2102 int status;
2104 cjni_env = pthread_getspecific (jvm_env_key);
2105 if (cjni_env == NULL)
2106 {
2107 ERROR ("java plugin: cjni_thread_detach: pthread_getspecific failed.");
2108 return (-1);
2109 }
2111 assert (cjni_env->reference_counter > 0);
2112 assert (cjni_env->jvm_env != NULL);
2114 cjni_env->reference_counter--;
2115 DEBUG ("java plugin: cjni_thread_detach: cjni_env->reference_counter = %i",
2116 cjni_env->reference_counter);
2118 if (cjni_env->reference_counter > 0)
2119 return (0);
2121 status = (*jvm)->DetachCurrentThread (jvm);
2122 if (status != 0)
2123 {
2124 ERROR ("java plugin: cjni_thread_detach: DetachCurrentThread failed "
2125 "with status %i.", status);
2126 }
2128 cjni_env->reference_counter = 0;
2129 cjni_env->jvm_env = NULL;
2131 return (0);
2132 } /* }}} int cjni_thread_detach */
2134 static int cjni_config_add_jvm_arg (oconfig_item_t *ci) /* {{{ */
2135 {
2136 char **tmp;
2138 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
2139 {
2140 WARNING ("java plugin: `JVMArg' needs exactly one string argument.");
2141 return (-1);
2142 }
2144 if (jvm != NULL)
2145 {
2146 ERROR ("java plugin: All `JVMArg' options MUST appear before all "
2147 "`LoadPlugin' options! The JVM is already started and I have to "
2148 "ignore this argument: %s",
2149 ci->values[0].value.string);
2150 return (-1);
2151 }
2153 tmp = realloc (jvm_argv, sizeof (char *) * (jvm_argc + 1));
2154 if (tmp == NULL)
2155 {
2156 ERROR ("java plugin: realloc failed.");
2157 return (-1);
2158 }
2159 jvm_argv = tmp;
2161 jvm_argv[jvm_argc] = strdup (ci->values[0].value.string);
2162 if (jvm_argv[jvm_argc] == NULL)
2163 {
2164 ERROR ("java plugin: strdup failed.");
2165 return (-1);
2166 }
2167 jvm_argc++;
2169 return (0);
2170 } /* }}} int cjni_config_add_jvm_arg */
2172 static int cjni_config_load_plugin (oconfig_item_t *ci) /* {{{ */
2173 {
2174 JNIEnv *jvm_env;
2175 java_plugin_class_t *class;
2176 jmethodID constructor_id;
2177 jobject tmp_object;
2179 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
2180 {
2181 WARNING ("java plugin: `LoadPlugin' needs exactly one string argument.");
2182 return (-1);
2183 }
2185 jvm_env = cjni_thread_attach ();
2186 if (jvm_env == NULL)
2187 return (-1);
2189 class = realloc (java_classes_list,
2190 (java_classes_list_len + 1) * sizeof (*java_classes_list));
2191 if (class == NULL)
2192 {
2193 ERROR ("java plugin: realloc failed.");
2194 cjni_thread_detach ();
2195 return (-1);
2196 }
2197 java_classes_list = class;
2198 class = java_classes_list + java_classes_list_len;
2200 memset (class, 0, sizeof (*class));
2201 class->name = strdup (ci->values[0].value.string);
2202 if (class->name == NULL)
2203 {
2204 ERROR ("java plugin: strdup failed.");
2205 cjni_thread_detach ();
2206 return (-1);
2207 }
2208 class->class = NULL;
2209 class->object = NULL;
2211 { /* Replace all dots ('.') with slashes ('/'). Dots are usually used
2212 thorough the Java community, but (Sun's) `FindClass' and friends need
2213 slashes. */
2214 for (size_t i = 0; class->name[i] != 0; i++)
2215 if (class->name[i] == '.')
2216 class->name[i] = '/';
2217 }
2219 DEBUG ("java plugin: Loading class %s", class->name);
2221 class->class = (*jvm_env)->FindClass (jvm_env, class->name);
2222 if (class->class == NULL)
2223 {
2224 ERROR ("java plugin: cjni_config_load_plugin: FindClass (%s) failed.",
2225 class->name);
2226 cjni_thread_detach ();
2227 free (class->name);
2228 return (-1);
2229 }
2231 constructor_id = (*jvm_env)->GetMethodID (jvm_env, class->class,
2232 "<init>", "()V");
2233 if (constructor_id == NULL)
2234 {
2235 ERROR ("java plugin: cjni_config_load_plugin: "
2236 "Could not find the constructor for `%s'.",
2237 class->name);
2238 cjni_thread_detach ();
2239 free (class->name);
2240 return (-1);
2241 }
2243 tmp_object = (*jvm_env)->NewObject (jvm_env, class->class,
2244 constructor_id);
2245 if (tmp_object != NULL)
2246 class->object = (*jvm_env)->NewGlobalRef (jvm_env, tmp_object);
2247 else
2248 class->object = NULL;
2249 if (class->object == NULL)
2250 {
2251 ERROR ("java plugin: cjni_config_load_plugin: "
2252 "Could create a new `%s' object.",
2253 class->name);
2254 cjni_thread_detach ();
2255 free (class->name);
2256 return (-1);
2257 }
2259 cjni_thread_detach ();
2261 java_classes_list_len++;
2263 return (0);
2264 } /* }}} int cjni_config_load_plugin */
2266 static int cjni_config_plugin_block (oconfig_item_t *ci) /* {{{ */
2267 {
2268 JNIEnv *jvm_env;
2269 cjni_callback_info_t *cbi;
2270 jobject o_ocitem;
2271 const char *name;
2273 jclass class;
2274 jmethodID method;
2276 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
2277 {
2278 WARNING ("java plugin: `Plugin' blocks "
2279 "need exactly one string argument.");
2280 return (-1);
2281 }
2283 name = ci->values[0].value.string;
2285 cbi = NULL;
2286 for (size_t i = 0; i < java_callbacks_num; i++)
2287 {
2288 if (java_callbacks[i].type != CB_TYPE_CONFIG)
2289 continue;
2291 if (strcmp (name, java_callbacks[i].name) != 0)
2292 continue;
2294 cbi = java_callbacks + i;
2295 break;
2296 }
2298 if (cbi == NULL)
2299 {
2300 NOTICE ("java plugin: Configuration block for `%s' found, but no such "
2301 "configuration callback has been registered. Please make sure, the "
2302 "`LoadPlugin' lines precede the `Plugin' blocks.",
2303 name);
2304 return (0);
2305 }
2307 DEBUG ("java plugin: Configuring %s", name);
2309 jvm_env = cjni_thread_attach ();
2310 if (jvm_env == NULL)
2311 return (-1);
2313 o_ocitem = ctoj_oconfig_item (jvm_env, ci);
2314 if (o_ocitem == NULL)
2315 {
2316 ERROR ("java plugin: cjni_config_plugin_block: ctoj_oconfig_item failed.");
2317 cjni_thread_detach ();
2318 return (-1);
2319 }
2321 class = (*jvm_env)->GetObjectClass (jvm_env, cbi->object);
2322 method = (*jvm_env)->GetMethodID (jvm_env, class,
2323 "config", "(Lorg/collectd/api/OConfigItem;)I");
2325 (*jvm_env)->CallIntMethod (jvm_env,
2326 cbi->object, method, o_ocitem);
2328 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
2329 cjni_thread_detach ();
2330 return (0);
2331 } /* }}} int cjni_config_plugin_block */
2333 static int cjni_config_perform (oconfig_item_t *ci) /* {{{ */
2334 {
2335 int success;
2336 int errors;
2337 int status;
2339 success = 0;
2340 errors = 0;
2342 for (int i = 0; i < ci->children_num; i++)
2343 {
2344 oconfig_item_t *child = ci->children + i;
2346 if (strcasecmp ("JVMArg", child->key) == 0)
2347 {
2348 status = cjni_config_add_jvm_arg (child);
2349 if (status == 0)
2350 success++;
2351 else
2352 errors++;
2353 }
2354 else if (strcasecmp ("LoadPlugin", child->key) == 0)
2355 {
2356 status = cjni_config_load_plugin (child);
2357 if (status == 0)
2358 success++;
2359 else
2360 errors++;
2361 }
2362 else if (strcasecmp ("Plugin", child->key) == 0)
2363 {
2364 status = cjni_config_plugin_block (child);
2365 if (status == 0)
2366 success++;
2367 else
2368 errors++;
2369 }
2370 else
2371 {
2372 WARNING ("java plugin: Option `%s' not allowed here.", child->key);
2373 errors++;
2374 }
2375 }
2377 DEBUG ("java plugin: jvm_argc = %zu;", jvm_argc);
2378 DEBUG ("java plugin: java_classes_list_len = %zu;", java_classes_list_len);
2380 if ((success == 0) && (errors > 0))
2381 {
2382 ERROR ("java plugin: All statements failed.");
2383 return (-1);
2384 }
2386 return (0);
2387 } /* }}} int cjni_config_perform */
2389 /* Copy the children of `ci' to the global `config_block' variable. */
2390 static int cjni_config_callback (oconfig_item_t *ci) /* {{{ */
2391 {
2392 oconfig_item_t *ci_copy;
2393 oconfig_item_t *tmp;
2395 assert (ci != NULL);
2396 if (ci->children_num == 0)
2397 return (0); /* nothing to do */
2399 ci_copy = oconfig_clone (ci);
2400 if (ci_copy == NULL)
2401 {
2402 ERROR ("java plugin: oconfig_clone failed.");
2403 return (-1);
2404 }
2406 if (config_block == NULL)
2407 {
2408 config_block = ci_copy;
2409 return (0);
2410 }
2412 tmp = realloc (config_block->children,
2413 (config_block->children_num + ci_copy->children_num) * sizeof (*tmp));
2414 if (tmp == NULL)
2415 {
2416 ERROR ("java plugin: realloc failed.");
2417 oconfig_free (ci_copy);
2418 return (-1);
2419 }
2420 config_block->children = tmp;
2422 /* Copy the pointers */
2423 memcpy (config_block->children + config_block->children_num,
2424 ci_copy->children,
2425 ci_copy->children_num * sizeof (*ci_copy->children));
2426 config_block->children_num += ci_copy->children_num;
2428 /* Delete the pointers from the copy, so `oconfig_free' can't free them. */
2429 memset (ci_copy->children, 0,
2430 ci_copy->children_num * sizeof (*ci_copy->children));
2431 ci_copy->children_num = 0;
2433 oconfig_free (ci_copy);
2435 return (0);
2436 } /* }}} int cjni_config_callback */
2438 /* Free the data contained in the `user_data_t' pointer passed to `cjni_read'
2439 * and `cjni_write'. In particular, delete the global reference to the Java
2440 * object. */
2441 static void cjni_callback_info_destroy (void *arg) /* {{{ */
2442 {
2443 JNIEnv *jvm_env;
2444 cjni_callback_info_t *cbi;
2446 DEBUG ("java plugin: cjni_callback_info_destroy (arg = %p);", arg);
2448 cbi = (cjni_callback_info_t *) arg;
2450 /* This condition can occur when shutting down. */
2451 if (jvm == NULL)
2452 {
2453 sfree (cbi);
2454 return;
2455 }
2457 if (arg == NULL)
2458 return;
2460 jvm_env = cjni_thread_attach ();
2461 if (jvm_env == NULL)
2462 {
2463 ERROR ("java plugin: cjni_callback_info_destroy: cjni_thread_attach failed.");
2464 return;
2465 }
2467 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
2469 cbi->method = NULL;
2470 cbi->object = NULL;
2471 cbi->class = NULL;
2472 free (cbi);
2474 cjni_thread_detach ();
2475 } /* }}} void cjni_callback_info_destroy */
2477 /* Call the CB_TYPE_READ callback pointed to by the `user_data_t' pointer. */
2478 static int cjni_read (user_data_t *ud) /* {{{ */
2479 {
2480 JNIEnv *jvm_env;
2481 cjni_callback_info_t *cbi;
2482 int ret_status;
2484 if (jvm == NULL)
2485 {
2486 ERROR ("java plugin: cjni_read: jvm == NULL");
2487 return (-1);
2488 }
2490 if ((ud == NULL) || (ud->data == NULL))
2491 {
2492 ERROR ("java plugin: cjni_read: Invalid user data.");
2493 return (-1);
2494 }
2496 jvm_env = cjni_thread_attach ();
2497 if (jvm_env == NULL)
2498 return (-1);
2500 cbi = (cjni_callback_info_t *) ud->data;
2502 ret_status = (*jvm_env)->CallIntMethod (jvm_env, cbi->object,
2503 cbi->method);
2505 cjni_thread_detach ();
2506 return (ret_status);
2507 } /* }}} int cjni_read */
2509 /* Call the CB_TYPE_WRITE callback pointed to by the `user_data_t' pointer. */
2510 static int cjni_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
2511 user_data_t *ud)
2512 {
2513 JNIEnv *jvm_env;
2514 cjni_callback_info_t *cbi;
2515 jobject vl_java;
2516 int ret_status;
2518 if (jvm == NULL)
2519 {
2520 ERROR ("java plugin: cjni_write: jvm == NULL");
2521 return (-1);
2522 }
2524 if ((ud == NULL) || (ud->data == NULL))
2525 {
2526 ERROR ("java plugin: cjni_write: Invalid user data.");
2527 return (-1);
2528 }
2530 jvm_env = cjni_thread_attach ();
2531 if (jvm_env == NULL)
2532 return (-1);
2534 cbi = (cjni_callback_info_t *) ud->data;
2536 vl_java = ctoj_value_list (jvm_env, ds, vl);
2537 if (vl_java == NULL)
2538 {
2539 ERROR ("java plugin: cjni_write: ctoj_value_list failed.");
2540 cjni_thread_detach ();
2541 return (-1);
2542 }
2544 ret_status = (*jvm_env)->CallIntMethod (jvm_env,
2545 cbi->object, cbi->method, vl_java);
2547 (*jvm_env)->DeleteLocalRef (jvm_env, vl_java);
2549 cjni_thread_detach ();
2550 return (ret_status);
2551 } /* }}} int cjni_write */
2553 /* Call the CB_TYPE_FLUSH callback pointed to by the `user_data_t' pointer. */
2554 static int cjni_flush (cdtime_t timeout, const char *identifier, /* {{{ */
2555 user_data_t *ud)
2556 {
2557 JNIEnv *jvm_env;
2558 cjni_callback_info_t *cbi;
2559 jobject o_timeout;
2560 jobject o_identifier;
2561 int ret_status;
2563 if (jvm == NULL)
2564 {
2565 ERROR ("java plugin: cjni_flush: jvm == NULL");
2566 return (-1);
2567 }
2569 if ((ud == NULL) || (ud->data == NULL))
2570 {
2571 ERROR ("java plugin: cjni_flush: Invalid user data.");
2572 return (-1);
2573 }
2575 jvm_env = cjni_thread_attach ();
2576 if (jvm_env == NULL)
2577 return (-1);
2579 cbi = (cjni_callback_info_t *) ud->data;
2581 o_timeout = ctoj_jdouble_to_number (jvm_env,
2582 (jdouble) CDTIME_T_TO_DOUBLE (timeout));
2583 if (o_timeout == NULL)
2584 {
2585 ERROR ("java plugin: cjni_flush: Converting double "
2586 "to Number object failed.");
2587 cjni_thread_detach ();
2588 return (-1);
2589 }
2591 o_identifier = NULL;
2592 if (identifier != NULL)
2593 {
2594 o_identifier = (*jvm_env)->NewStringUTF (jvm_env, identifier);
2595 if (o_identifier == NULL)
2596 {
2597 (*jvm_env)->DeleteLocalRef (jvm_env, o_timeout);
2598 ERROR ("java plugin: cjni_flush: NewStringUTF failed.");
2599 cjni_thread_detach ();
2600 return (-1);
2601 }
2602 }
2604 ret_status = (*jvm_env)->CallIntMethod (jvm_env,
2605 cbi->object, cbi->method, o_timeout, o_identifier);
2607 (*jvm_env)->DeleteLocalRef (jvm_env, o_identifier);
2608 (*jvm_env)->DeleteLocalRef (jvm_env, o_timeout);
2610 cjni_thread_detach ();
2611 return (ret_status);
2612 } /* }}} int cjni_flush */
2614 /* Call the CB_TYPE_LOG callback pointed to by the `user_data_t' pointer. */
2615 static void cjni_log (int severity, const char *message, /* {{{ */
2616 user_data_t *ud)
2617 {
2618 JNIEnv *jvm_env;
2619 cjni_callback_info_t *cbi;
2620 jobject o_message;
2622 if (jvm == NULL)
2623 return;
2625 if ((ud == NULL) || (ud->data == NULL))
2626 return;
2628 jvm_env = cjni_thread_attach ();
2629 if (jvm_env == NULL)
2630 return;
2632 cbi = (cjni_callback_info_t *) ud->data;
2634 o_message = (*jvm_env)->NewStringUTF (jvm_env, message);
2635 if (o_message == NULL)
2636 {
2637 cjni_thread_detach ();
2638 return;
2639 }
2641 (*jvm_env)->CallVoidMethod (jvm_env,
2642 cbi->object, cbi->method, (jint) severity, o_message);
2644 (*jvm_env)->DeleteLocalRef (jvm_env, o_message);
2646 cjni_thread_detach ();
2647 } /* }}} void cjni_log */
2649 /* Call the CB_TYPE_NOTIFICATION callback pointed to by the `user_data_t'
2650 * pointer. */
2651 static int cjni_notification (const notification_t *n, /* {{{ */
2652 user_data_t *ud)
2653 {
2654 JNIEnv *jvm_env;
2655 cjni_callback_info_t *cbi;
2656 jobject o_notification;
2657 int ret_status;
2659 if (jvm == NULL)
2660 {
2661 ERROR ("java plugin: cjni_read: jvm == NULL");
2662 return (-1);
2663 }
2665 if ((ud == NULL) || (ud->data == NULL))
2666 {
2667 ERROR ("java plugin: cjni_read: Invalid user data.");
2668 return (-1);
2669 }
2671 jvm_env = cjni_thread_attach ();
2672 if (jvm_env == NULL)
2673 return (-1);
2675 cbi = (cjni_callback_info_t *) ud->data;
2677 o_notification = ctoj_notification (jvm_env, n);
2678 if (o_notification == NULL)
2679 {
2680 ERROR ("java plugin: cjni_notification: ctoj_notification failed.");
2681 cjni_thread_detach ();
2682 return (-1);
2683 }
2685 ret_status = (*jvm_env)->CallIntMethod (jvm_env,
2686 cbi->object, cbi->method, o_notification);
2688 (*jvm_env)->DeleteLocalRef (jvm_env, o_notification);
2690 cjni_thread_detach ();
2691 return (ret_status);
2692 } /* }}} int cjni_notification */
2694 /* Callbacks for matches implemented in Java */
2695 static int cjni_match_target_create (const oconfig_item_t *ci, /* {{{ */
2696 void **user_data)
2697 {
2698 JNIEnv *jvm_env;
2699 cjni_callback_info_t *cbi_ret;
2700 cjni_callback_info_t *cbi_factory;
2701 const char *name;
2702 jobject o_ci;
2703 jobject o_tmp;
2704 int type;
2706 cbi_ret = NULL;
2707 o_ci = NULL;
2708 jvm_env = NULL;
2710 #define BAIL_OUT(status) \
2711 if (cbi_ret != NULL) { \
2712 free (cbi_ret->name); \
2713 if ((jvm_env != NULL) && (cbi_ret->object != NULL)) \
2714 (*jvm_env)->DeleteLocalRef (jvm_env, cbi_ret->object); \
2715 } \
2716 free (cbi_ret); \
2717 if (o_ci != NULL) \
2718 (*jvm_env)->DeleteLocalRef (jvm_env, o_ci); \
2719 cjni_thread_detach (); \
2720 return (status)
2722 if (jvm == NULL)
2723 {
2724 ERROR ("java plugin: cjni_read: jvm == NULL");
2725 return (-1);
2726 }
2728 jvm_env = cjni_thread_attach ();
2729 if (jvm_env == NULL)
2730 return (-1);
2732 /* Find out whether to create a match or a target. */
2733 if (strcasecmp ("Match", ci->key) == 0)
2734 type = CB_TYPE_MATCH;
2735 else if (strcasecmp ("Target", ci->key) == 0)
2736 type = CB_TYPE_TARGET;
2737 else
2738 {
2739 ERROR ("java plugin: cjni_match_target_create: Can't figure out whether "
2740 "to create a match or a target.");
2741 BAIL_OUT (-1);
2742 }
2744 /* This is the name of the match we should create. */
2745 name = ci->values[0].value.string;
2747 /* Lets see if we have a matching factory here.. */
2748 cbi_factory = NULL;
2749 for (size_t i = 0; i < java_callbacks_num; i++)
2750 {
2751 if (java_callbacks[i].type != type)
2752 continue;
2754 if (strcmp (name, java_callbacks[i].name) != 0)
2755 continue;
2757 cbi_factory = java_callbacks + i;
2758 break;
2759 }
2761 /* Nope, no factory for that name.. */
2762 if (cbi_factory == NULL)
2763 {
2764 ERROR ("java plugin: cjni_match_target_create: "
2765 "No such match factory registered: %s",
2766 name);
2767 BAIL_OUT (-1);
2768 }
2770 /* We convert `ci' to its Java equivalent.. */
2771 o_ci = ctoj_oconfig_item (jvm_env, ci);
2772 if (o_ci == NULL)
2773 {
2774 ERROR ("java plugin: cjni_match_target_create: "
2775 "ctoj_oconfig_item failed.");
2776 BAIL_OUT (-1);
2777 }
2779 /* Allocate a new callback info structure. This is going to be our user_data
2780 * pointer. */
2781 cbi_ret = calloc (1, sizeof (*cbi_ret));
2782 if (cbi_ret == NULL)
2783 {
2784 ERROR ("java plugin: cjni_match_target_create: calloc failed.");
2785 BAIL_OUT (-1);
2786 }
2788 cbi_ret->object = NULL;
2789 cbi_ret->type = type;
2791 /* Lets fill the callback info structure.. First, the name: */
2792 cbi_ret->name = strdup (name);
2793 if (cbi_ret->name == NULL)
2794 {
2795 ERROR ("java plugin: cjni_match_target_create: strdup failed.");
2796 BAIL_OUT (-1);
2797 }
2799 /* Then call the factory method so it creates a new object for us. */
2800 o_tmp = (*jvm_env)->CallObjectMethod (jvm_env,
2801 cbi_factory->object, cbi_factory->method, o_ci);
2802 if (o_tmp == NULL)
2803 {
2804 ERROR ("java plugin: cjni_match_target_create: CallObjectMethod failed.");
2805 BAIL_OUT (-1);
2806 }
2808 cbi_ret->object = (*jvm_env)->NewGlobalRef (jvm_env, o_tmp);
2809 if (o_tmp == NULL)
2810 {
2811 ERROR ("java plugin: cjni_match_target_create: NewGlobalRef failed.");
2812 BAIL_OUT (-1);
2813 }
2815 /* This is the class of the match. It is possibly different from the class of
2816 * the match-factory! */
2817 cbi_ret->class = (*jvm_env)->GetObjectClass (jvm_env, cbi_ret->object);
2818 if (cbi_ret->class == NULL)
2819 {
2820 ERROR ("java plugin: cjni_match_target_create: GetObjectClass failed.");
2821 BAIL_OUT (-1);
2822 }
2824 /* Lookup the `int match (DataSet, ValueList)' method. */
2825 cbi_ret->method = (*jvm_env)->GetMethodID (jvm_env, cbi_ret->class,
2826 /* method name = */ (type == CB_TYPE_MATCH) ? "match" : "invoke",
2827 "(Lorg/collectd/api/DataSet;Lorg/collectd/api/ValueList;)I");
2828 if (cbi_ret->method == NULL)
2829 {
2830 ERROR ("java plugin: cjni_match_target_create: GetMethodID failed.");
2831 BAIL_OUT (-1);
2832 }
2834 /* Return the newly created match via the user_data pointer. */
2835 *user_data = (void *) cbi_ret;
2837 cjni_thread_detach ();
2839 DEBUG ("java plugin: cjni_match_target_create: "
2840 "Successfully created a `%s' %s.",
2841 cbi_ret->name, (type == CB_TYPE_MATCH) ? "match" : "target");
2843 /* Success! */
2844 return (0);
2845 #undef BAIL_OUT
2846 } /* }}} int cjni_match_target_create */
2848 static int cjni_match_target_destroy (void **user_data) /* {{{ */
2849 {
2850 cjni_callback_info_destroy (*user_data);
2851 *user_data = NULL;
2853 return (0);
2854 } /* }}} int cjni_match_target_destroy */
2856 static int cjni_match_target_invoke (const data_set_t *ds, /* {{{ */
2857 value_list_t *vl, notification_meta_t **meta, void **user_data)
2858 {
2859 JNIEnv *jvm_env;
2860 cjni_callback_info_t *cbi;
2861 jobject o_vl;
2862 jobject o_ds;
2863 int ret_status;
2864 int status;
2866 if (jvm == NULL)
2867 {
2868 ERROR ("java plugin: cjni_match_target_invoke: jvm == NULL");
2869 return (-1);
2870 }
2872 jvm_env = cjni_thread_attach ();
2873 if (jvm_env == NULL)
2874 return (-1);
2876 cbi = (cjni_callback_info_t *) *user_data;
2878 o_vl = ctoj_value_list (jvm_env, ds, vl);
2879 if (o_vl == NULL)
2880 {
2881 ERROR ("java plugin: cjni_match_target_invoke: ctoj_value_list failed.");
2882 cjni_thread_detach ();
2883 return (-1);
2884 }
2886 o_ds = ctoj_data_set (jvm_env, ds);
2887 if (o_ds == NULL)
2888 {
2889 ERROR ("java plugin: cjni_match_target_invoke: ctoj_value_list failed.");
2890 cjni_thread_detach ();
2891 return (-1);
2892 }
2894 ret_status = (*jvm_env)->CallIntMethod (jvm_env, cbi->object, cbi->method,
2895 o_ds, o_vl);
2897 DEBUG ("java plugin: cjni_match_target_invoke: Method returned %i.", ret_status);
2899 /* If we're executing a target, copy the `ValueList' back to our
2900 * `value_list_t'. */
2901 if (cbi->type == CB_TYPE_TARGET)
2902 {
2903 value_list_t new_vl = { 0 };
2905 status = jtoc_value_list (jvm_env, &new_vl, o_vl);
2906 if (status != 0)
2907 {
2908 ERROR ("java plugin: cjni_match_target_invoke: "
2909 "jtoc_value_list failed.");
2910 }
2911 else /* if (status == 0) */
2912 {
2913 /* plugin_dispatch_values assures that this is dynamically allocated
2914 * memory. */
2915 sfree (vl->values);
2917 /* This will replace the vl->values pointer to a new, dynamically
2918 * allocated piece of memory. */
2919 memcpy (vl, &new_vl, sizeof (*vl));
2920 }
2921 } /* if (cbi->type == CB_TYPE_TARGET) */
2923 cjni_thread_detach ();
2924 return (ret_status);
2925 } /* }}} int cjni_match_target_invoke */
2927 /* Iterate over `java_callbacks' and call all CB_TYPE_INIT callbacks. */
2928 static int cjni_init_plugins (JNIEnv *jvm_env) /* {{{ */
2929 {
2930 int status;
2932 for (size_t i = 0; i < java_callbacks_num; i++)
2933 {
2934 if (java_callbacks[i].type != CB_TYPE_INIT)
2935 continue;
2937 DEBUG ("java plugin: Initializing %s", java_callbacks[i].name);
2939 status = (*jvm_env)->CallIntMethod (jvm_env,
2940 java_callbacks[i].object, java_callbacks[i].method);
2941 if (status != 0)
2942 {
2943 ERROR ("java plugin: Initializing `%s' failed with status %i. "
2944 "Removing read function.",
2945 java_callbacks[i].name, status);
2946 plugin_unregister_read (java_callbacks[i].name);
2947 }
2948 }
2950 return (0);
2951 } /* }}} int cjni_init_plugins */
2953 /* Iterate over `java_callbacks' and call all CB_TYPE_SHUTDOWN callbacks. */
2954 static int cjni_shutdown_plugins (JNIEnv *jvm_env) /* {{{ */
2955 {
2956 int status;
2958 for (size_t i = 0; i < java_callbacks_num; i++)
2959 {
2960 if (java_callbacks[i].type != CB_TYPE_SHUTDOWN)
2961 continue;
2963 DEBUG ("java plugin: Shutting down %s", java_callbacks[i].name);
2965 status = (*jvm_env)->CallIntMethod (jvm_env,
2966 java_callbacks[i].object, java_callbacks[i].method);
2967 if (status != 0)
2968 {
2969 ERROR ("java plugin: Shutting down `%s' failed with status %i. ",
2970 java_callbacks[i].name, status);
2971 }
2972 }
2974 return (0);
2975 } /* }}} int cjni_shutdown_plugins */
2978 static int cjni_shutdown (void) /* {{{ */
2979 {
2980 JNIEnv *jvm_env;
2981 JavaVMAttachArgs args = { 0 };
2982 int status;
2984 if (jvm == NULL)
2985 return (0);
2987 jvm_env = NULL;
2988 args.version = JNI_VERSION_1_2;
2990 status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, &args);
2991 if (status != 0)
2992 {
2993 ERROR ("java plugin: cjni_shutdown: AttachCurrentThread failed with status %i.",
2994 status);
2995 return (-1);
2996 }
2998 /* Execute all the shutdown functions registered by plugins. */
2999 cjni_shutdown_plugins (jvm_env);
3001 /* Release all the global references to callback functions */
3002 for (size_t i = 0; i < java_callbacks_num; i++)
3003 {
3004 if (java_callbacks[i].object != NULL)
3005 {
3006 (*jvm_env)->DeleteGlobalRef (jvm_env, java_callbacks[i].object);
3007 java_callbacks[i].object = NULL;
3008 }
3009 sfree (java_callbacks[i].name);
3010 }
3011 java_callbacks_num = 0;
3012 sfree (java_callbacks);
3014 /* Release all the global references to directly loaded classes. */
3015 for (size_t i = 0; i < java_classes_list_len; i++)
3016 {
3017 if (java_classes_list[i].object != NULL)
3018 {
3019 (*jvm_env)->DeleteGlobalRef (jvm_env, java_classes_list[i].object);
3020 java_classes_list[i].object = NULL;
3021 }
3022 sfree (java_classes_list[i].name);
3023 }
3024 java_classes_list_len = 0;
3025 sfree (java_classes_list);
3027 /* Destroy the JVM */
3028 DEBUG ("java plugin: Destroying the JVM.");
3029 (*jvm)->DestroyJavaVM (jvm);
3030 jvm = NULL;
3031 jvm_env = NULL;
3033 pthread_key_delete (jvm_env_key);
3035 /* Free the JVM argument list */
3036 for (size_t i = 0; i < jvm_argc; i++)
3037 sfree (jvm_argv[i]);
3038 jvm_argc = 0;
3039 sfree (jvm_argv);
3041 return (0);
3042 } /* }}} int cjni_shutdown */
3044 /* Initialization: Create a JVM, load all configured classes and call their
3045 * `config' and `init' callback methods. */
3046 static int cjni_init (void) /* {{{ */
3047 {
3048 JNIEnv *jvm_env;
3050 if ((config_block == NULL) && (jvm == NULL))
3051 {
3052 ERROR ("java plugin: cjni_init: No configuration block for "
3053 "the java plugin was found.");
3054 return (-1);
3055 }
3057 if (config_block != NULL)
3058 {
3059 cjni_config_perform (config_block);
3060 oconfig_free (config_block);
3061 }
3063 if (jvm == NULL)
3064 {
3065 ERROR ("java plugin: cjni_init: jvm == NULL");
3066 return (-1);
3067 }
3069 jvm_env = cjni_thread_attach ();
3070 if (jvm_env == NULL)
3071 return (-1);
3073 cjni_init_plugins (jvm_env);
3075 cjni_thread_detach ();
3076 return (0);
3077 } /* }}} int cjni_init */
3079 void module_register (void)
3080 {
3081 plugin_register_complex_config ("java", cjni_config_callback);
3082 plugin_register_init ("java", cjni_init);
3083 plugin_register_shutdown ("java", cjni_shutdown);
3084 } /* void module_register (void) */
3086 /* vim: set sw=2 sts=2 et fdm=marker : */