bdfba76b7c841e944c6d1af742b25ed379fd3b71
1 /**
2 * collectd - src/java.c
3 * Copyright (C) 2009 Florian octo Forster
4 * Copyright (C) 2008 Justo Alonso Achaques
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Florian octo Forster <octo at verplant.org>
21 * Justo Alonso Achaques <justo.alonso at gmail.com>
22 **/
24 #include "collectd.h"
25 #include "plugin.h"
26 #include "common.h"
28 #include <pthread.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 struct java_plugin_config_s /* {{{ */
56 {
57 char *name;
58 oconfig_item_t *ci;
59 };
60 typedef struct java_plugin_config_s java_plugin_config_t;
61 /* }}} */
63 #define CB_TYPE_CONFIG 1
64 #define CB_TYPE_INIT 2
65 #define CB_TYPE_READ 3
66 #define CB_TYPE_WRITE 4
67 #define CB_TYPE_SHUTDOWN 5
68 struct cjni_callback_info_s /* {{{ */
69 {
70 char *name;
71 int type;
72 jclass class;
73 jobject object;
74 jmethodID method;
75 };
76 typedef struct cjni_callback_info_s cjni_callback_info_t;
77 /* }}} */
79 /*
80 * Global variables
81 */
82 static JavaVM *jvm = NULL;
83 static pthread_key_t jvm_env_key;
85 /* Configuration options for the JVM. */
86 static char **jvm_argv = NULL;
87 static size_t jvm_argc = 0;
89 /* List of class names to load */
90 static java_plugin_class_t *java_classes_list = NULL;
91 static size_t java_classes_list_len;
93 /* List of `config_item_t's for Java plugins */
94 static java_plugin_config_t *java_plugin_configs = NULL;
95 static size_t java_plugin_configs_num = 0;
97 /* List of config, init, and shutdown callbacks. */
98 static cjni_callback_info_t *java_callbacks = NULL;
99 static size_t java_callbacks_num = 0;
100 static pthread_mutex_t java_callbacks_lock = PTHREAD_MUTEX_INITIALIZER;
102 /*
103 * Prototypes
104 *
105 * Mostly functions that are needed by the Java interface functions.
106 */
107 static void cjni_callback_info_destroy (void *arg);
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);
112 /*
113 * C to Java conversion functions
114 */
115 static int ctoj_string (JNIEnv *jvm_env, /* {{{ */
116 const char *string,
117 jclass class_ptr, jobject object_ptr, const char *method_name)
118 {
119 jmethodID m_set;
120 jstring o_string;
122 /* Create a java.lang.String */
123 o_string = (*jvm_env)->NewStringUTF (jvm_env,
124 (string != NULL) ? string : "");
125 if (o_string == NULL)
126 {
127 ERROR ("java plugin: ctoj_string: NewStringUTF failed.");
128 return (-1);
129 }
131 /* Search for the `void setFoo (String s)' method. */
132 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
133 method_name, "(Ljava/lang/String;)V");
134 if (m_set == NULL)
135 {
136 ERROR ("java plugin: ctoj_string: Cannot find method `void %s (String)'.",
137 method_name);
138 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
139 return (-1);
140 }
142 /* Call the method. */
143 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, o_string);
145 /* Decrease reference counter on the java.lang.String object. */
146 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
148 return (0);
149 } /* }}} int ctoj_string */
151 static int ctoj_int (JNIEnv *jvm_env, /* {{{ */
152 jint value,
153 jclass class_ptr, jobject object_ptr, const char *method_name)
154 {
155 jmethodID m_set;
157 /* Search for the `void setFoo (int i)' method. */
158 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
159 method_name, "(I)V");
160 if (m_set == NULL)
161 {
162 ERROR ("java plugin: ctoj_int: Cannot find method `void %s (int)'.",
163 method_name);
164 return (-1);
165 }
167 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
169 return (0);
170 } /* }}} int ctoj_int */
172 static int ctoj_long (JNIEnv *jvm_env, /* {{{ */
173 jlong value,
174 jclass class_ptr, jobject object_ptr, const char *method_name)
175 {
176 jmethodID m_set;
178 /* Search for the `void setFoo (long l)' method. */
179 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
180 method_name, "(J)V");
181 if (m_set == NULL)
182 {
183 ERROR ("java plugin: ctoj_long: Cannot find method `void %s (long)'.",
184 method_name);
185 return (-1);
186 }
188 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
190 return (0);
191 } /* }}} int ctoj_long */
193 static int ctoj_double (JNIEnv *jvm_env, /* {{{ */
194 jdouble value,
195 jclass class_ptr, jobject object_ptr, const char *method_name)
196 {
197 jmethodID m_set;
199 /* Search for the `void setFoo (double d)' method. */
200 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
201 method_name, "(D)V");
202 if (m_set == NULL)
203 {
204 ERROR ("java plugin: ctoj_double: Cannot find method `void %s (double)'.",
205 method_name);
206 return (-1);
207 }
209 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
211 return (0);
212 } /* }}} int ctoj_double */
214 /* Convert a jlong to a java.lang.Number */
215 static jobject ctoj_jlong_to_number (JNIEnv *jvm_env, jlong value) /* {{{ */
216 {
217 jclass c_long;
218 jmethodID m_long_constructor;
220 /* Look up the java.lang.Long class */
221 c_long = (*jvm_env)->FindClass (jvm_env, "java.lang.Long");
222 if (c_long == NULL)
223 {
224 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
225 "java.lang.Long class failed.");
226 return (NULL);
227 }
229 m_long_constructor = (*jvm_env)->GetMethodID (jvm_env,
230 c_long, "<init>", "(J)V");
231 if (m_long_constructor == NULL)
232 {
233 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
234 "`Long (long)' constructor failed.");
235 return (NULL);
236 }
238 return ((*jvm_env)->NewObject (jvm_env,
239 c_long, m_long_constructor, value));
240 } /* }}} jobject ctoj_jlong_to_number */
242 /* Convert a jdouble to a java.lang.Number */
243 static jobject ctoj_jdouble_to_number (JNIEnv *jvm_env, jdouble value) /* {{{ */
244 {
245 jclass c_double;
246 jmethodID m_double_constructor;
248 /* Look up the java.lang.Long class */
249 c_double = (*jvm_env)->FindClass (jvm_env, "java.lang.Double");
250 if (c_double == NULL)
251 {
252 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
253 "java.lang.Double class failed.");
254 return (NULL);
255 }
257 m_double_constructor = (*jvm_env)->GetMethodID (jvm_env,
258 c_double, "<init>", "(D)V");
259 if (m_double_constructor == NULL)
260 {
261 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
262 "`Double (double)' constructor failed.");
263 return (NULL);
264 }
266 return ((*jvm_env)->NewObject (jvm_env,
267 c_double, m_double_constructor, value));
268 } /* }}} jobject ctoj_jdouble_to_number */
270 /* Convert a value_t to a java.lang.Number */
271 static jobject ctoj_value_to_number (JNIEnv *jvm_env, /* {{{ */
272 value_t value, int ds_type)
273 {
274 if (ds_type == DS_TYPE_COUNTER)
275 return (ctoj_jlong_to_number (jvm_env, (jlong) value.counter));
276 else if (ds_type == DS_TYPE_GAUGE)
277 return (ctoj_jdouble_to_number (jvm_env, (jdouble) value.gauge));
278 else
279 return (NULL);
280 } /* }}} jobject ctoj_value_to_number */
282 /* Convert a data_source_t to a org.collectd.api.DataSource */
283 static jobject ctoj_data_source (JNIEnv *jvm_env, /* {{{ */
284 const data_source_t *dsrc)
285 {
286 jclass c_datasource;
287 jmethodID m_datasource_constructor;
288 jobject o_datasource;
289 int status;
291 /* Look up the DataSource class */
292 c_datasource = (*jvm_env)->FindClass (jvm_env,
293 "org.collectd.api.DataSource");
294 if (c_datasource == NULL)
295 {
296 ERROR ("java plugin: ctoj_data_source: "
297 "FindClass (org.collectd.api.DataSource) failed.");
298 return (NULL);
299 }
301 /* Lookup the `ValueList ()' constructor. */
302 m_datasource_constructor = (*jvm_env)->GetMethodID (jvm_env, c_datasource,
303 "<init>", "()V");
304 if (m_datasource_constructor == NULL)
305 {
306 ERROR ("java plugin: ctoj_data_source: Cannot find the "
307 "`DataSource ()' constructor.");
308 return (NULL);
309 }
311 /* Create a new instance. */
312 o_datasource = (*jvm_env)->NewObject (jvm_env, c_datasource,
313 m_datasource_constructor);
314 if (o_datasource == NULL)
315 {
316 ERROR ("java plugin: ctoj_data_source: "
317 "Creating a new DataSource instance failed.");
318 return (NULL);
319 }
321 /* Set name via `void setName (String name)' */
322 status = ctoj_string (jvm_env, dsrc->name,
323 c_datasource, o_datasource, "setName");
324 if (status != 0)
325 {
326 ERROR ("java plugin: ctoj_data_source: "
327 "ctoj_string (setName) failed.");
328 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
329 return (NULL);
330 }
332 /* Set type via `void setType (int type)' */
333 status = ctoj_int (jvm_env, dsrc->type,
334 c_datasource, o_datasource, "setType");
335 if (status != 0)
336 {
337 ERROR ("java plugin: ctoj_data_source: "
338 "ctoj_int (setType) failed.");
339 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
340 return (NULL);
341 }
343 /* Set min via `void setMin (double min)' */
344 status = ctoj_double (jvm_env, dsrc->min,
345 c_datasource, o_datasource, "setMin");
346 if (status != 0)
347 {
348 ERROR ("java plugin: ctoj_data_source: "
349 "ctoj_double (setMin) failed.");
350 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
351 return (NULL);
352 }
354 /* Set max via `void setMax (double max)' */
355 status = ctoj_double (jvm_env, dsrc->max,
356 c_datasource, o_datasource, "setMax");
357 if (status != 0)
358 {
359 ERROR ("java plugin: ctoj_data_source: "
360 "ctoj_double (setMax) failed.");
361 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
362 return (NULL);
363 }
365 return (o_datasource);
366 } /* }}} jobject ctoj_data_source */
368 /* Convert a oconfig_value_t to a org.collectd.api.OConfigValue */
369 static jobject ctoj_oconfig_value (JNIEnv *jvm_env, /* {{{ */
370 oconfig_value_t ocvalue)
371 {
372 jclass c_ocvalue;
373 jmethodID m_ocvalue_constructor;
374 jobject o_argument;
375 jobject o_ocvalue;
377 m_ocvalue_constructor = NULL;
378 o_argument = NULL;
380 c_ocvalue = (*jvm_env)->FindClass (jvm_env,
381 "org.collectd.api.OConfigValue");
382 if (c_ocvalue == NULL)
383 {
384 ERROR ("java plugin: ctoj_oconfig_value: "
385 "FindClass (org.collectd.api.OConfigValue) failed.");
386 return (NULL);
387 }
389 if (ocvalue.type == OCONFIG_TYPE_BOOLEAN)
390 {
391 jboolean tmp_boolean;
393 tmp_boolean = (ocvalue.value.boolean == 0) ? JNI_FALSE : JNI_TRUE;
395 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
396 "<init>", "(Z)V");
397 if (m_ocvalue_constructor == NULL)
398 {
399 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
400 "`OConfigValue (boolean)' constructor.");
401 return (NULL);
402 }
404 return ((*jvm_env)->NewObject (jvm_env,
405 c_ocvalue, m_ocvalue_constructor, tmp_boolean));
406 } /* if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) */
407 else if (ocvalue.type == OCONFIG_TYPE_STRING)
408 {
409 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
410 "<init>", "(Ljava/lang/String;)V");
411 if (m_ocvalue_constructor == NULL)
412 {
413 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
414 "`OConfigValue (String)' constructor.");
415 return (NULL);
416 }
418 o_argument = (*jvm_env)->NewStringUTF (jvm_env, ocvalue.value.string);
419 if (o_argument == NULL)
420 {
421 ERROR ("java plugin: ctoj_oconfig_value: "
422 "Creating a String object failed.");
423 return (NULL);
424 }
425 }
426 else if (ocvalue.type == OCONFIG_TYPE_NUMBER)
427 {
428 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
429 "<init>", "(Ljava/lang/Number;)V");
430 if (m_ocvalue_constructor == NULL)
431 {
432 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
433 "`OConfigValue (Number)' constructor.");
434 return (NULL);
435 }
437 o_argument = ctoj_jdouble_to_number (jvm_env,
438 (jdouble) ocvalue.value.number);
439 if (o_argument == NULL)
440 {
441 ERROR ("java plugin: ctoj_oconfig_value: "
442 "Creating a Number object failed.");
443 return (NULL);
444 }
445 }
446 else
447 {
448 return (NULL);
449 }
451 assert (m_ocvalue_constructor != NULL);
452 assert (o_argument != NULL);
454 o_ocvalue = (*jvm_env)->NewObject (jvm_env,
455 c_ocvalue, m_ocvalue_constructor, o_argument);
456 if (o_ocvalue == NULL)
457 {
458 ERROR ("java plugin: ctoj_oconfig_value: "
459 "Creating an OConfigValue object failed.");
460 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
461 return (NULL);
462 }
464 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
465 return (o_ocvalue);
466 } /* }}} jobject ctoj_oconfig_value */
468 /* Convert a oconfig_item_t to a org.collectd.api.OConfigItem */
469 static jobject ctoj_oconfig_item (JNIEnv *jvm_env, /* {{{ */
470 const oconfig_item_t *ci)
471 {
472 jclass c_ocitem;
473 jmethodID m_ocitem_constructor;
474 jmethodID m_addvalue;
475 jmethodID m_addchild;
476 jobject o_key;
477 jobject o_ocitem;
478 int i;
480 c_ocitem = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.OConfigItem");
481 if (c_ocitem == NULL)
482 {
483 ERROR ("java plugin: ctoj_oconfig_item: "
484 "FindClass (org.collectd.api.OConfigItem) failed.");
485 return (NULL);
486 }
488 /* Get the required methods: m_ocitem_constructor, m_addvalue, and m_addchild
489 * {{{ */
490 m_ocitem_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
491 "<init>", "(Ljava/lang/String;)V");
492 if (m_ocitem_constructor == NULL)
493 {
494 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
495 "`OConfigItem (String)' constructor.");
496 return (NULL);
497 }
499 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
500 "addValue", "(Lorg/collectd/api/OConfigValue;)V");
501 if (m_addvalue == NULL)
502 {
503 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
504 "`addValue (OConfigValue)' method.");
505 return (NULL);
506 }
508 m_addchild = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
509 "addChild", "(Lorg/collectd/api/OConfigItem;)V");
510 if (m_addchild == NULL)
511 {
512 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
513 "`addChild (OConfigItem)' method.");
514 return (NULL);
515 }
516 /* }}} */
518 /* Create a String object with the key.
519 * Needed for calling the constructor. */
520 o_key = (*jvm_env)->NewStringUTF (jvm_env, ci->key);
521 if (o_key == NULL)
522 {
523 ERROR ("java plugin: ctoj_oconfig_item: "
524 "Creating String object failed.");
525 return (NULL);
526 }
528 /* Create an OConfigItem object */
529 o_ocitem = (*jvm_env)->NewObject (jvm_env,
530 c_ocitem, m_ocitem_constructor, o_key);
531 if (o_ocitem == NULL)
532 {
533 ERROR ("java plugin: ctoj_oconfig_item: "
534 "Creating an OConfigItem object failed.");
535 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
536 return (NULL);
537 }
539 /* We don't need the String object any longer.. */
540 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
542 /* Call OConfigItem.addValue for each value */
543 for (i = 0; i < ci->values_num; i++) /* {{{ */
544 {
545 jobject o_value;
547 o_value = ctoj_oconfig_value (jvm_env, ci->values[i]);
548 if (o_value == NULL)
549 {
550 ERROR ("java plugin: ctoj_oconfig_item: "
551 "Creating an OConfigValue object failed.");
552 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
553 return (NULL);
554 }
556 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_value);
557 (*jvm_env)->DeleteLocalRef (jvm_env, o_value);
558 } /* }}} for (i = 0; i < ci->values_num; i++) */
560 /* Call OConfigItem.addChild for each child */
561 for (i = 0; i < ci->children_num; i++) /* {{{ */
562 {
563 jobject o_child;
565 o_child = ctoj_oconfig_item (jvm_env, ci->children + i);
566 if (o_child == NULL)
567 {
568 ERROR ("java plugin: ctoj_oconfig_item: "
569 "Creating an OConfigItem object failed.");
570 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
571 return (NULL);
572 }
574 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_child);
575 (*jvm_env)->DeleteLocalRef (jvm_env, o_child);
576 } /* }}} for (i = 0; i < ci->children_num; i++) */
578 return (o_ocitem);
579 } /* }}} jobject ctoj_oconfig_item */
581 /* Convert a data_set_t to a org.collectd.api.DataSet */
582 static jobject ctoj_data_set (JNIEnv *jvm_env, const data_set_t *ds) /* {{{ */
583 {
584 jclass c_dataset;
585 jmethodID m_constructor;
586 jmethodID m_add;
587 jobject o_type;
588 jobject o_dataset;
589 int i;
591 /* Look up the org.collectd.api.DataSet class */
592 c_dataset = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.DataSet");
593 if (c_dataset == NULL)
594 {
595 ERROR ("java plugin: ctoj_data_set: Looking up the "
596 "org.collectd.api.DataSet class failed.");
597 return (NULL);
598 }
600 /* Search for the `DataSet (String type)' constructor. */
601 m_constructor = (*jvm_env)->GetMethodID (jvm_env,
602 c_dataset, "<init>", "(Ljava.lang.String;)V");
603 if (m_constructor == NULL)
604 {
605 ERROR ("java plugin: ctoj_data_set: Looking up the "
606 "`DataSet (String)' constructor failed.");
607 return (NULL);
608 }
610 /* Search for the `void addDataSource (DataSource)' method. */
611 m_add = (*jvm_env)->GetMethodID (jvm_env,
612 c_dataset, "addDataSource", "(Lorg.collectd.api.DataSource;)V");
613 if (m_add == NULL)
614 {
615 ERROR ("java plugin: ctoj_data_set: Looking up the "
616 "`addDataSource (DataSource)' method failed.");
617 return (NULL);
618 }
620 o_type = (*jvm_env)->NewStringUTF (jvm_env, ds->type);
621 if (o_type == NULL)
622 {
623 ERROR ("java plugin: ctoj_data_set: Creating a String object failed.");
624 return (NULL);
625 }
627 o_dataset = (*jvm_env)->NewObject (jvm_env,
628 c_dataset, m_constructor, o_type);
629 if (o_dataset == NULL)
630 {
631 ERROR ("java plugin: ctoj_data_set: Creating a DataSet object failed.");
632 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
633 return (NULL);
634 }
636 /* Decrease reference counter on the java.lang.String object. */
637 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
639 for (i = 0; i < ds->ds_num; i++)
640 {
641 jobject o_datasource;
643 o_datasource = ctoj_data_source (jvm_env, ds->ds + i);
644 if (o_datasource == NULL)
645 {
646 ERROR ("java plugin: ctoj_data_set: ctoj_data_source (%s.%s) failed",
647 ds->type, ds->ds[i].name);
648 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
649 return (NULL);
650 }
652 (*jvm_env)->CallVoidMethod (jvm_env, o_dataset, m_add, o_datasource);
654 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
655 } /* for (i = 0; i < ds->ds_num; i++) */
657 return (o_dataset);
658 } /* }}} jobject ctoj_data_set */
660 static int ctoj_value_list_add_value (JNIEnv *jvm_env, /* {{{ */
661 value_t value, int ds_type,
662 jclass class_ptr, jobject object_ptr)
663 {
664 jmethodID m_addvalue;
665 jobject o_number;
667 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
668 "addValue", "(Ljava/lang/Number;)V");
669 if (m_addvalue == NULL)
670 {
671 ERROR ("java plugin: ctoj_value_list_add_value: "
672 "Cannot find method `void addValue (Number)'.");
673 return (-1);
674 }
676 o_number = ctoj_value_to_number (jvm_env, value, ds_type);
677 if (o_number == NULL)
678 {
679 ERROR ("java plugin: ctoj_value_list_add_value: "
680 "ctoj_value_to_number failed.");
681 return (-1);
682 }
684 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_addvalue, o_number);
686 (*jvm_env)->DeleteLocalRef (jvm_env, o_number);
688 return (0);
689 } /* }}} int ctoj_value_list_add_value */
691 static int ctoj_value_list_add_data_set (JNIEnv *jvm_env, /* {{{ */
692 jclass c_valuelist, jobject o_valuelist, const data_set_t *ds)
693 {
694 jmethodID m_setdataset;
695 jobject o_dataset;
697 /* Look for the `void setDataSource (List<DataSource> ds)' method. */
698 m_setdataset = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
699 "setDataSet", "(Lorg.collectd.api.DataSet;)V");
700 if (m_setdataset == NULL)
701 {
702 ERROR ("java plugin: ctoj_value_list_add_data_set: "
703 "Cannot find the `void setDataSet (DataSet)' method.");
704 return (-1);
705 }
707 /* Create a DataSet object. */
708 o_dataset = ctoj_data_set (jvm_env, ds);
709 if (o_dataset == NULL)
710 {
711 ERROR ("java plugin: ctoj_value_list_add_data_set: "
712 "ctoj_data_set (%s) failed.", ds->type);
713 return (-1);
714 }
716 /* Actually call the method. */
717 (*jvm_env)->CallVoidMethod (jvm_env,
718 o_valuelist, m_setdataset, o_dataset);
720 /* Decrease reference counter on the List<DataSource> object. */
721 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
723 return (0);
724 } /* }}} int ctoj_value_list_add_data_set */
726 static jobject ctoj_value_list (JNIEnv *jvm_env, /* {{{ */
727 const data_set_t *ds, const value_list_t *vl)
728 {
729 jclass c_valuelist;
730 jmethodID m_valuelist_constructor;
731 jobject o_valuelist;
732 int status;
733 int i;
735 /* First, create a new ValueList instance..
736 * Look up the class.. */
737 c_valuelist = (*jvm_env)->FindClass (jvm_env,
738 "org.collectd.api.ValueList");
739 if (c_valuelist == NULL)
740 {
741 ERROR ("java plugin: ctoj_value_list: "
742 "FindClass (org.collectd.api.ValueList) failed.");
743 return (NULL);
744 }
746 /* Lookup the `ValueList ()' constructor. */
747 m_valuelist_constructor = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
748 "<init>", "()V");
749 if (m_valuelist_constructor == NULL)
750 {
751 ERROR ("java plugin: ctoj_value_list: Cannot find the "
752 "`ValueList ()' constructor.");
753 return (NULL);
754 }
756 /* Create a new instance. */
757 o_valuelist = (*jvm_env)->NewObject (jvm_env, c_valuelist,
758 m_valuelist_constructor);
759 if (o_valuelist == NULL)
760 {
761 ERROR ("java plugin: ctoj_value_list: Creating a new ValueList instance "
762 "failed.");
763 return (NULL);
764 }
766 status = ctoj_value_list_add_data_set (jvm_env,
767 c_valuelist, o_valuelist, ds);
768 if (status != 0)
769 {
770 ERROR ("java plugin: ctoj_value_list: "
771 "ctoj_value_list_add_data_set failed.");
772 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
773 return (NULL);
774 }
776 /* Set the strings.. */
777 #define SET_STRING(str,method_name) do { \
778 status = ctoj_string (jvm_env, str, \
779 c_valuelist, o_valuelist, method_name); \
780 if (status != 0) { \
781 ERROR ("java plugin: ctoj_value_list: jtoc_string (%s) failed.", \
782 method_name); \
783 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist); \
784 return (NULL); \
785 } } while (0)
787 SET_STRING (vl->host, "setHost");
788 SET_STRING (vl->plugin, "setPlugin");
789 SET_STRING (vl->plugin_instance, "setPluginInstance");
790 SET_STRING (vl->type, "setType");
791 SET_STRING (vl->type_instance, "setTypeInstance");
793 #undef SET_STRING
795 /* Set the `time' member. Java stores time in milliseconds. */
796 status = ctoj_long (jvm_env, ((jlong) vl->time) * ((jlong) 1000),
797 c_valuelist, o_valuelist, "setTime");
798 if (status != 0)
799 {
800 ERROR ("java plugin: ctoj_value_list: ctoj_long (setTime) failed.");
801 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
802 return (NULL);
803 }
805 /* Set the `interval' member.. */
806 status = ctoj_long (jvm_env, (jlong) vl->interval,
807 c_valuelist, o_valuelist, "setInterval");
808 if (status != 0)
809 {
810 ERROR ("java plugin: ctoj_value_list: ctoj_long (setInterval) failed.");
811 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
812 return (NULL);
813 }
815 for (i = 0; i < vl->values_len; i++)
816 {
817 status = ctoj_value_list_add_value (jvm_env, vl->values[i], ds->ds[i].type,
818 c_valuelist, o_valuelist);
819 if (status != 0)
820 {
821 ERROR ("java plugin: ctoj_value_list: "
822 "ctoj_value_list_add_value failed.");
823 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
824 return (NULL);
825 }
826 }
828 return (o_valuelist);
829 } /* }}} int ctoj_value_list */
831 /*
832 * Java to C conversion functions
833 */
834 static int jtoc_string (JNIEnv *jvm_env, /* {{{ */
835 char *buffer, size_t buffer_size,
836 jclass class_ptr, jobject object_ptr, const char *method_name)
837 {
838 jmethodID method_id;
839 jobject string_obj;
840 const char *c_str;
842 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
843 method_name, "()Ljava/lang/String;");
844 if (method_id == NULL)
845 {
846 ERROR ("java plugin: jtoc_string: Cannot find method `String %s ()'.",
847 method_name);
848 return (-1);
849 }
851 string_obj = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, method_id);
852 if (string_obj == NULL)
853 {
854 ERROR ("java plugin: jtoc_string: CallObjectMethod (%s) failed.",
855 method_name);
856 return (-1);
857 }
859 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, string_obj, 0);
860 if (c_str == NULL)
861 {
862 ERROR ("java plugin: jtoc_string: GetStringUTFChars failed.");
863 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
864 return (-1);
865 }
867 sstrncpy (buffer, c_str, buffer_size);
869 (*jvm_env)->ReleaseStringUTFChars (jvm_env, string_obj, c_str);
870 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
872 return (0);
873 } /* }}} int jtoc_string */
875 static int jtoc_long (JNIEnv *jvm_env, /* {{{ */
876 jlong *ret_value,
877 jclass class_ptr, jobject object_ptr, const char *method_name)
878 {
879 jmethodID method_id;
881 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
882 method_name, "()J");
883 if (method_id == NULL)
884 {
885 ERROR ("java plugin: jtoc_long: Cannot find method `long %s ()'.",
886 method_name);
887 return (-1);
888 }
890 *ret_value = (*jvm_env)->CallLongMethod (jvm_env, object_ptr, method_id);
892 return (0);
893 } /* }}} int jtoc_long */
895 static int jtoc_double (JNIEnv *jvm_env, /* {{{ */
896 jdouble *ret_value,
897 jclass class_ptr, jobject object_ptr, const char *method_name)
898 {
899 jmethodID method_id;
901 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
902 method_name, "()D");
903 if (method_id == NULL)
904 {
905 ERROR ("java plugin: jtoc_string: Cannot find method `double %s ()'.",
906 method_name);
907 return (-1);
908 }
910 *ret_value = (*jvm_env)->CallDoubleMethod (jvm_env, object_ptr, method_id);
912 return (0);
913 } /* }}} int jtoc_double */
915 static int jtoc_value (JNIEnv *jvm_env, /* {{{ */
916 value_t *ret_value, int ds_type, jobject object_ptr)
917 {
918 jclass class_ptr;
919 int status;
921 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
923 if (ds_type == DS_TYPE_COUNTER)
924 {
925 jlong tmp_long;
927 status = jtoc_long (jvm_env, &tmp_long,
928 class_ptr, object_ptr, "longValue");
929 if (status != 0)
930 {
931 ERROR ("java plugin: jtoc_value: "
932 "jtoc_long failed.");
933 return (-1);
934 }
935 (*ret_value).counter = (counter_t) tmp_long;
936 }
937 else
938 {
939 jdouble tmp_double;
941 status = jtoc_double (jvm_env, &tmp_double,
942 class_ptr, object_ptr, "doubleValue");
943 if (status != 0)
944 {
945 ERROR ("java plugin: jtoc_value: "
946 "jtoc_double failed.");
947 return (-1);
948 }
949 (*ret_value).gauge = (gauge_t) tmp_double;
950 }
952 return (0);
953 } /* }}} int jtoc_value */
955 static int jtoc_values_array (JNIEnv *jvm_env, /* {{{ */
956 const data_set_t *ds, value_list_t *vl,
957 jclass class_ptr, jobject object_ptr)
958 {
959 jmethodID m_getvalues;
960 jmethodID m_toarray;
961 jobject o_list;
962 jobjectArray o_number_array;
964 value_t *values;
965 int values_num;
966 int i;
968 values_num = ds->ds_num;
970 values = NULL;
971 o_number_array = NULL;
972 o_list = NULL;
974 #define BAIL_OUT(status) \
975 free (values); \
976 if (o_number_array != NULL) \
977 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array); \
978 if (o_list != NULL) \
979 (*jvm_env)->DeleteLocalRef (jvm_env, o_list); \
980 return (status);
982 /* Call: List<Number> ValueList.getValues () */
983 m_getvalues = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
984 "getValues", "()Ljava/util/List;");
985 if (m_getvalues == NULL)
986 {
987 ERROR ("java plugin: jtoc_values_array: "
988 "Cannot find method `List getValues ()'.");
989 BAIL_OUT (-1);
990 }
992 o_list = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, m_getvalues);
993 if (o_list == NULL)
994 {
995 ERROR ("java plugin: jtoc_values_array: "
996 "CallObjectMethod (getValues) failed.");
997 BAIL_OUT (-1);
998 }
1000 /* Call: Number[] List.toArray () */
1001 m_toarray = (*jvm_env)->GetMethodID (jvm_env,
1002 (*jvm_env)->GetObjectClass (jvm_env, o_list),
1003 "toArray", "()[Ljava/lang/Object;");
1004 if (m_toarray == NULL)
1005 {
1006 ERROR ("java plugin: jtoc_values_array: "
1007 "Cannot find method `Object[] toArray ()'.");
1008 BAIL_OUT (-1);
1009 }
1011 o_number_array = (*jvm_env)->CallObjectMethod (jvm_env, o_list, m_toarray);
1012 if (o_number_array == NULL)
1013 {
1014 ERROR ("java plugin: jtoc_values_array: "
1015 "CallObjectMethod (toArray) failed.");
1016 BAIL_OUT (-1);
1017 }
1019 values = calloc (values_num, sizeof (value_t));
1020 if (values == NULL)
1021 {
1022 ERROR ("java plugin: jtoc_values_array: calloc failed.");
1023 BAIL_OUT (-1);
1024 }
1026 for (i = 0; i < values_num; i++)
1027 {
1028 jobject o_number;
1029 int status;
1031 o_number = (*jvm_env)->GetObjectArrayElement (jvm_env,
1032 o_number_array, (jsize) i);
1033 if (o_number == NULL)
1034 {
1035 ERROR ("java plugin: jtoc_values_array: "
1036 "GetObjectArrayElement (%i) failed.", i);
1037 BAIL_OUT (-1);
1038 }
1040 status = jtoc_value (jvm_env, values + i, ds->ds[i].type, o_number);
1041 if (status != 0)
1042 {
1043 ERROR ("java plugin: jtoc_values_array: "
1044 "jtoc_value (%i) failed.", i);
1045 BAIL_OUT (-1);
1046 }
1047 } /* for (i = 0; i < values_num; i++) */
1049 vl->values = values;
1050 vl->values_len = values_num;
1052 #undef BAIL_OUT
1053 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array);
1054 (*jvm_env)->DeleteLocalRef (jvm_env, o_list);
1055 return (0);
1056 } /* }}} int jtoc_values_array */
1058 /* Convert a org.collectd.api.ValueList to a value_list_t. */
1059 static int jtoc_value_list (JNIEnv *jvm_env, value_list_t *vl, /* {{{ */
1060 jobject object_ptr)
1061 {
1062 jclass class_ptr;
1063 int status;
1064 jlong tmp_long;
1065 const data_set_t *ds;
1067 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1068 if (class_ptr == NULL)
1069 {
1070 ERROR ("java plugin: jtoc_value_list: GetObjectClass failed.");
1071 return (-1);
1072 }
1074 #define SET_STRING(buffer,method) do { \
1075 status = jtoc_string (jvm_env, buffer, sizeof (buffer), \
1076 class_ptr, object_ptr, method); \
1077 if (status != 0) { \
1078 ERROR ("java plugin: jtoc_value_list: jtoc_string (%s) failed.", \
1079 method); \
1080 return (-1); \
1081 } } while (0)
1083 SET_STRING(vl->type, "getType");
1085 ds = plugin_get_ds (vl->type);
1086 if (ds == NULL)
1087 {
1088 ERROR ("java plugin: jtoc_value_list: Data-set `%s' is not defined. "
1089 "Please consult the types.db(5) manpage for mor information.",
1090 vl->type);
1091 return (-1);
1092 }
1094 SET_STRING(vl->host, "getHost");
1095 SET_STRING(vl->plugin, "getPlugin");
1096 SET_STRING(vl->plugin_instance, "getPluginInstance");
1097 SET_STRING(vl->type_instance, "getTypeInstance");
1099 #undef SET_STRING
1101 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1102 if (status != 0)
1103 {
1104 ERROR ("java plugin: jtoc_value_list: jtoc_long (getTime) failed.");
1105 return (-1);
1106 }
1107 /* Java measures time in milliseconds. */
1108 vl->time = (time_t) (tmp_long / ((jlong) 1000));
1110 status = jtoc_long (jvm_env, &tmp_long,
1111 class_ptr, object_ptr, "getInterval");
1112 if (status != 0)
1113 {
1114 ERROR ("java plugin: jtoc_value_list: jtoc_long (getInterval) failed.");
1115 return (-1);
1116 }
1117 vl->interval = (int) tmp_long;
1119 status = jtoc_values_array (jvm_env, ds, vl, class_ptr, object_ptr);
1120 if (status != 0)
1121 {
1122 ERROR ("java plugin: jtoc_value_list: jtoc_values_array failed.");
1123 return (-1);
1124 }
1126 return (0);
1127 } /* }}} int jtoc_value_list */
1129 static cjni_callback_info_t *cjni_callback_info_create (JNIEnv *jvm_env, /* {{{ */
1130 jobject o_name, jobject o_callback, int type)
1131 {
1132 const char *c_name;
1133 cjni_callback_info_t *cbi;
1134 const char *method_name;
1135 const char *method_signature;
1137 switch (type)
1138 {
1139 case CB_TYPE_CONFIG:
1140 method_name = "Config";
1141 method_signature = "(Lorg/collectd/api/OConfigItem;)I";
1142 break;
1144 case CB_TYPE_INIT:
1145 method_name = "Init";
1146 method_signature = "()I";
1147 break;
1149 case CB_TYPE_READ:
1150 method_name = "Read";
1151 method_signature = "()I";
1152 break;
1154 case CB_TYPE_WRITE:
1155 method_name = "Write";
1156 method_signature = "(Lorg/collectd/api/ValueList;)I";
1157 break;
1159 case CB_TYPE_SHUTDOWN:
1160 method_name = "Shutdown";
1161 method_signature = "()I";
1162 break;
1164 default:
1165 ERROR ("java plugin: cjni_callback_info_create: Unknown type: %#x",
1166 type);
1167 return (NULL);
1168 }
1170 c_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_name, 0);
1171 if (c_name == NULL)
1172 {
1173 ERROR ("java plugin: cjni_callback_info_create: "
1174 "GetStringUTFChars failed.");
1175 return (NULL);
1176 }
1178 cbi = (cjni_callback_info_t *) malloc (sizeof (*cbi));
1179 if (cbi == NULL)
1180 {
1181 ERROR ("java plugin: cjni_callback_info_create: malloc failed.");
1182 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1183 return (NULL);
1184 }
1185 memset (cbi, 0, sizeof (*cbi));
1186 cbi->type = type;
1188 cbi->name = strdup (c_name);
1189 if (cbi->name == NULL)
1190 {
1191 pthread_mutex_unlock (&java_callbacks_lock);
1192 ERROR ("java plugin: cjni_callback_info_create: strdup failed.");
1193 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1194 return (NULL);
1195 }
1197 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1199 cbi->class = (*jvm_env)->GetObjectClass (jvm_env, o_callback);
1200 if (cbi->class == NULL)
1201 {
1202 ERROR ("java plugin: cjni_callback_info_create: GetObjectClass failed.");
1203 free (cbi);
1204 return (NULL);
1205 }
1207 cbi->object = o_callback;
1209 cbi->method = (*jvm_env)->GetMethodID (jvm_env, cbi->class,
1210 method_name, method_signature);
1211 if (cbi->method == NULL)
1212 {
1213 ERROR ("java plugin: cjni_callback_info_create: "
1214 "Cannot find the `%s' method with signature `%s'.",
1215 method_name, method_signature);
1216 free (cbi);
1217 return (NULL);
1218 }
1220 (*jvm_env)->NewGlobalRef (jvm_env, o_callback);
1222 return (cbi);
1223 } /* }}} cjni_callback_info_t cjni_callback_info_create */
1225 static int cjni_callback_register (JNIEnv *jvm_env, /* {{{ */
1226 jobject o_name, jobject o_callback, int type)
1227 {
1228 cjni_callback_info_t *cbi;
1229 cjni_callback_info_t *tmp;
1230 #if COLLECT_DEBUG
1231 const char *type_str;
1232 #endif
1234 cbi = cjni_callback_info_create (jvm_env, o_name, o_callback, type);
1235 if (cbi == NULL)
1236 return (-1);
1238 #if COLLECT_DEBUG
1239 switch (type)
1240 {
1241 case CB_TYPE_CONFIG:
1242 type_str = "config";
1243 break;
1245 case CB_TYPE_INIT:
1246 type_str = "init";
1247 break;
1249 case CB_TYPE_SHUTDOWN:
1250 type_str = "shutdown";
1251 break;
1253 default:
1254 type_str = "<unknown>";
1255 }
1256 DEBUG ("java plugin: Registering new %s callback: %s",
1257 type_str, cbi->name);
1258 #endif
1260 pthread_mutex_lock (&java_callbacks_lock);
1262 tmp = (cjni_callback_info_t *) realloc (java_callbacks,
1263 (java_callbacks_num + 1) * sizeof (*java_callbacks));
1264 if (tmp == NULL)
1265 {
1266 pthread_mutex_unlock (&java_callbacks_lock);
1267 ERROR ("java plugin: cjni_callback_register: realloc failed.");
1269 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1270 free (cbi);
1272 return (-1);
1273 }
1274 java_callbacks = tmp;
1275 java_callbacks[java_callbacks_num] = *cbi;
1276 java_callbacks_num++;
1278 pthread_mutex_unlock (&java_callbacks_lock);
1280 free (cbi);
1281 return (0);
1282 } /* }}} int cjni_callback_register */
1284 /*
1285 * Functions accessible from Java
1286 */
1287 static jint JNICALL cjni_api_dispatch_values (JNIEnv *jvm_env, /* {{{ */
1288 jobject this, jobject java_vl)
1289 {
1290 value_list_t vl = VALUE_LIST_INIT;
1291 int status;
1293 DEBUG ("cjni_api_dispatch_values: java_vl = %p;", (void *) java_vl);
1295 status = jtoc_value_list (jvm_env, &vl, java_vl);
1296 if (status != 0)
1297 {
1298 ERROR ("java plugin: cjni_api_dispatch_values: jtoc_value_list failed.");
1299 return (-1);
1300 }
1302 status = plugin_dispatch_values (&vl);
1304 sfree (vl.values);
1306 return (status);
1307 } /* }}} jint cjni_api_dispatch_values */
1309 static jobject JNICALL cjni_api_get_ds (JNIEnv *jvm_env, /* {{{ */
1310 jobject this, jobject o_string_type)
1311 {
1312 const char *ds_name;
1313 const data_set_t *ds;
1314 jobject o_dataset;
1316 ds_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_string_type, 0);
1317 if (ds_name == NULL)
1318 {
1319 ERROR ("java plugin: cjni_api_get_ds: GetStringUTFChars failed.");
1320 return (NULL);
1321 }
1323 ds = plugin_get_ds (ds_name);
1324 DEBUG ("java plugin: cjni_api_get_ds: "
1325 "plugin_get_ds (%s) = %p;", ds_name, (void *) ds);
1327 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_string_type, ds_name);
1329 if (ds == NULL)
1330 return (NULL);
1332 o_dataset = ctoj_data_set (jvm_env, ds);
1333 return (o_dataset);
1334 } /* }}} jint cjni_api_get_ds */
1336 static jint JNICALL cjni_api_register_config (JNIEnv *jvm_env, /* {{{ */
1337 jobject this, jobject o_name, jobject o_config)
1338 {
1339 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_CONFIG));
1340 } /* }}} jint cjni_api_register_config */
1342 static jint JNICALL cjni_api_register_init (JNIEnv *jvm_env, /* {{{ */
1343 jobject this, jobject o_name, jobject o_config)
1344 {
1345 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_INIT));
1346 } /* }}} jint cjni_api_register_init */
1348 static jint JNICALL cjni_api_register_read (JNIEnv *jvm_env, /* {{{ */
1349 jobject this, jobject o_name, jobject o_read)
1350 {
1351 user_data_t ud;
1352 cjni_callback_info_t *cbi;
1354 cbi = cjni_callback_info_create (jvm_env, o_name, o_read, CB_TYPE_READ);
1355 if (cbi == NULL)
1356 return (-1);
1358 DEBUG ("java plugin: Registering new read callback: %s", cbi->name);
1360 memset (&ud, 0, sizeof (ud));
1361 ud.data = (void *) cbi;
1362 ud.free_func = cjni_callback_info_destroy;
1364 plugin_register_complex_read (cbi->name, cjni_read, &ud);
1366 (*jvm_env)->DeleteLocalRef (jvm_env, o_read);
1368 return (0);
1369 } /* }}} jint cjni_api_register_read */
1371 static jint JNICALL cjni_api_register_write (JNIEnv *jvm_env, /* {{{ */
1372 jobject this, jobject o_name, jobject o_write)
1373 {
1374 user_data_t ud;
1375 cjni_callback_info_t *cbi;
1377 cbi = cjni_callback_info_create (jvm_env, o_name, o_write, CB_TYPE_WRITE);
1378 if (cbi == NULL)
1379 return (-1);
1381 DEBUG ("java plugin: Registering new write callback: %s", cbi->name);
1383 memset (&ud, 0, sizeof (ud));
1384 ud.data = (void *) cbi;
1385 ud.free_func = cjni_callback_info_destroy;
1387 plugin_register_write (cbi->name, cjni_write, &ud);
1389 (*jvm_env)->DeleteLocalRef (jvm_env, o_write);
1391 return (0);
1392 } /* }}} jint cjni_api_register_write */
1394 static jint JNICALL cjni_api_register_shutdown (JNIEnv *jvm_env, /* {{{ */
1395 jobject this, jobject o_name, jobject o_shutdown)
1396 {
1397 return (cjni_callback_register (jvm_env, o_name, o_shutdown,
1398 CB_TYPE_SHUTDOWN));
1399 } /* }}} jint cjni_api_register_shutdown */
1401 static JNINativeMethod jni_api_functions[] = /* {{{ */
1402 {
1403 { "DispatchValues",
1404 "(Lorg/collectd/api/ValueList;)I",
1405 cjni_api_dispatch_values },
1407 { "GetDS",
1408 "(Ljava/lang/String;)Lorg/collectd/api/DataSet;",
1409 cjni_api_get_ds },
1411 { "RegisterConfig",
1412 "(Ljava/lang/String;Lorg/collectd/api/CollectdConfigInterface;)I",
1413 cjni_api_register_config },
1415 { "RegisterInit",
1416 "(Ljava/lang/String;Lorg/collectd/api/CollectdInitInterface;)I",
1417 cjni_api_register_init },
1419 { "RegisterRead",
1420 "(Ljava/lang/String;Lorg/collectd/api/CollectdReadInterface;)I",
1421 cjni_api_register_read },
1423 { "RegisterWrite",
1424 "(Ljava/lang/String;Lorg/collectd/api/CollectdWriteInterface;)I",
1425 cjni_api_register_write },
1427 { "RegisterShutdown",
1428 "(Ljava/lang/String;Lorg/collectd/api/CollectdShutdownInterface;)I",
1429 cjni_api_register_shutdown }
1431 };
1432 static size_t jni_api_functions_num = sizeof (jni_api_functions)
1433 / sizeof (jni_api_functions[0]);
1434 /* }}} */
1436 /*
1437 * Functions
1438 */
1439 static JNIEnv *cjni_thread_attach (void) /* {{{ */
1440 {
1441 cjni_jvm_env_t *cjni_env;
1442 JNIEnv *jvm_env;
1444 cjni_env = pthread_getspecific (jvm_env_key);
1445 if (cjni_env == NULL)
1446 {
1447 /* This pointer is free'd in `cjni_jvm_env_destroy'. */
1448 cjni_env = (cjni_jvm_env_t *) malloc (sizeof (*cjni_env));
1449 if (cjni_env == NULL)
1450 {
1451 ERROR ("java plugin: cjni_thread_attach: malloc failed.");
1452 return (NULL);
1453 }
1454 memset (cjni_env, 0, sizeof (*cjni_env));
1455 cjni_env->reference_counter = 0;
1456 cjni_env->jvm_env = NULL;
1458 pthread_setspecific (jvm_env_key, cjni_env);
1459 }
1461 if (cjni_env->reference_counter > 0)
1462 {
1463 cjni_env->reference_counter++;
1464 jvm_env = cjni_env->jvm_env;
1465 }
1466 else
1467 {
1468 int status;
1469 JavaVMAttachArgs args;
1471 assert (cjni_env->jvm_env == NULL);
1473 memset (&args, 0, sizeof (args));
1474 args.version = JNI_VERSION_1_2;
1476 status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, (void *) &args);
1477 if (status != 0)
1478 {
1479 ERROR ("java plugin: cjni_thread_attach: AttachCurrentThread failed "
1480 "with status %i.", status);
1481 return (NULL);
1482 }
1484 cjni_env->reference_counter = 1;
1485 cjni_env->jvm_env = jvm_env;
1486 }
1488 DEBUG ("java plugin: cjni_thread_attach: cjni_env->reference_counter = %i",
1489 cjni_env->reference_counter);
1490 assert (jvm_env != NULL);
1491 return (jvm_env);
1492 } /* }}} JNIEnv *cjni_thread_attach */
1494 static int cjni_thread_detach (void) /* {{{ */
1495 {
1496 cjni_jvm_env_t *cjni_env;
1497 int status;
1499 cjni_env = pthread_getspecific (jvm_env_key);
1500 if (cjni_env == NULL)
1501 {
1502 ERROR ("java plugin: cjni_thread_detach: pthread_getspecific failed.");
1503 return (-1);
1504 }
1506 assert (cjni_env->reference_counter > 0);
1507 assert (cjni_env->jvm_env != NULL);
1509 cjni_env->reference_counter--;
1510 DEBUG ("java plugin: cjni_thread_detach: cjni_env->reference_counter = %i",
1511 cjni_env->reference_counter);
1513 if (cjni_env->reference_counter > 0)
1514 return (0);
1516 status = (*jvm)->DetachCurrentThread (jvm);
1517 if (status != 0)
1518 {
1519 ERROR ("java plugin: cjni_thread_detach: DetachCurrentThread failed "
1520 "with status %i.", status);
1521 }
1523 cjni_env->reference_counter = 0;
1524 cjni_env->jvm_env = NULL;
1526 return (0);
1527 } /* }}} JNIEnv *cjni_thread_attach */
1529 static void cjni_jvm_env_destroy (void *args) /* {{{ */
1530 {
1531 cjni_jvm_env_t *cjni_env;
1533 if (args == NULL)
1534 return;
1536 cjni_env = (cjni_jvm_env_t *) args;
1538 if (cjni_env->reference_counter > 0)
1539 {
1540 ERROR ("java plugin: cjni_jvm_env_destroy: "
1541 "cjni_env->reference_counter = %i;", cjni_env->reference_counter);
1542 }
1544 if (cjni_env->jvm_env != NULL)
1545 {
1546 ERROR ("java plugin: cjni_jvm_env_destroy: cjni_env->jvm_env = %p;",
1547 (void *) cjni_env->jvm_env);
1548 }
1550 /* The pointer is allocated in `cjni_thread_attach' */
1551 free (cjni_env);
1552 } /* }}} void cjni_jvm_env_destroy */
1554 /*
1555 * Delete a global reference, set by the various `Register*' functions.
1556 */
1557 static void cjni_callback_info_destroy (void *arg) /* {{{ */
1558 {
1559 JNIEnv *jvm_env;
1560 cjni_callback_info_t *cbi;
1562 DEBUG ("java plugin: cjni_callback_info_destroy (arg = %p);", arg);
1564 if (arg == NULL)
1565 return;
1567 jvm_env = cjni_thread_attach ();
1568 if (jvm_env == NULL)
1569 {
1570 ERROR ("java plugin: cjni_callback_info_destroy: cjni_thread_attach failed.");
1571 return;
1572 }
1574 cbi = (cjni_callback_info_t *) arg;
1576 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1578 cbi->method = NULL;
1579 cbi->object = NULL;
1580 cbi->class = NULL;
1581 free (cbi);
1583 cjni_thread_detach ();
1584 } /* }}} void cjni_callback_info_destroy */
1586 static int cjni_config_add_jvm_arg (oconfig_item_t *ci) /* {{{ */
1587 {
1588 char **tmp;
1590 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1591 {
1592 WARNING ("java plugin: `JVMArg' needs exactly one string argument.");
1593 return (-1);
1594 }
1596 tmp = (char **) realloc (jvm_argv, sizeof (char *) * (jvm_argc + 1));
1597 if (tmp == NULL)
1598 {
1599 ERROR ("java plugin: realloc failed.");
1600 return (-1);
1601 }
1602 jvm_argv = tmp;
1604 jvm_argv[jvm_argc] = strdup (ci->values[0].value.string);
1605 if (jvm_argv[jvm_argc] == NULL)
1606 {
1607 ERROR ("java plugin: strdup failed.");
1608 return (-1);
1609 }
1610 jvm_argc++;
1612 return (0);
1613 } /* }}} int cjni_config_add_jvm_arg */
1615 static int cjni_config_load_plugin (oconfig_item_t *ci) /* {{{ */
1616 {
1617 java_plugin_class_t *tmp;
1619 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1620 {
1621 WARNING ("java plugin: `LoadPlugin' needs exactly one string argument.");
1622 return (-1);
1623 }
1625 tmp = (java_plugin_class_t *) realloc (java_classes_list,
1626 (java_classes_list_len + 1) * sizeof (*java_classes_list));
1627 if (tmp == NULL)
1628 {
1629 ERROR ("java plugin: realloc failed.");
1630 return (-1);
1631 }
1632 java_classes_list = tmp;
1633 tmp = java_classes_list + java_classes_list_len;
1635 memset (tmp, 0, sizeof (*tmp));
1636 tmp->name = strdup (ci->values[0].value.string);
1637 if (tmp->name == NULL)
1638 {
1639 ERROR ("java plugin: strdup failed.");
1640 return (-1);
1641 }
1642 tmp->class = NULL;
1643 tmp->object = NULL;
1645 java_classes_list_len++;
1647 return (0);
1648 } /* }}} int cjni_config_load_plugin */
1650 static int cjni_config_plugin_block (oconfig_item_t *ci) /* {{{ */
1651 {
1652 java_plugin_config_t *tmp;
1653 char *name;
1654 size_t i;
1656 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1657 {
1658 WARNING ("java plugin: `Plugin' blocks "
1659 "need exactly one string argument.");
1660 return (-1);
1661 }
1663 name = strdup (ci->values[0].value.string);
1664 if (name == NULL)
1665 {
1666 ERROR ("java plugin: cjni_config_plugin_block: strdup faiiled.");
1667 return (-1);
1668 }
1670 for (i = 0; i < java_plugin_configs_num; i++)
1671 {
1672 if (strcmp (java_plugin_configs[i].name, name) == 0)
1673 {
1674 WARNING ("java plugin: There is more than one <Plugin \"%s\"> block. "
1675 "This is currently not supported - "
1676 "only the first block will be used!",
1677 name);
1678 free (name);
1679 return (0);
1680 }
1681 }
1683 tmp = (java_plugin_config_t *) realloc (java_plugin_configs,
1684 (java_plugin_configs_num + 1) * sizeof (*java_plugin_configs));
1685 if (tmp == NULL)
1686 {
1687 ERROR ("java plugin: cjni_config_plugin_block: realloc failed.");
1688 free (name);
1689 return (-1);
1690 }
1691 java_plugin_configs = tmp;
1692 tmp = java_plugin_configs + java_plugin_configs_num;
1694 tmp->name = name;
1695 tmp->ci = oconfig_clone (ci);
1696 if (tmp->ci == NULL)
1697 {
1698 ERROR ("java plugin: cjni_config_plugin_block: "
1699 "oconfig_clone failed for `%s'.",
1700 name);
1701 free (name);
1702 return (-1);
1703 }
1705 DEBUG ("java plugin: cjni_config_plugin_block: "
1706 "Successfully copied config for `%s'.",
1707 name);
1709 java_plugin_configs_num++;
1710 return (0);
1711 } /* }}} int cjni_config_plugin_block */
1713 static int cjni_config (oconfig_item_t *ci) /* {{{ */
1714 {
1715 int success;
1716 int errors;
1717 int status;
1718 int i;
1720 success = 0;
1721 errors = 0;
1723 for (i = 0; i < ci->children_num; i++)
1724 {
1725 oconfig_item_t *child = ci->children + i;
1727 if (strcasecmp ("JVMArg", child->key) == 0)
1728 {
1729 status = cjni_config_add_jvm_arg (child);
1730 if (status == 0)
1731 success++;
1732 else
1733 errors++;
1734 }
1735 else if (strcasecmp ("LoadPlugin", child->key) == 0)
1736 {
1737 status = cjni_config_load_plugin (child);
1738 if (status == 0)
1739 success++;
1740 else
1741 errors++;
1742 }
1743 else if (strcasecmp ("Plugin", child->key) == 0)
1744 {
1745 status = cjni_config_plugin_block (child);
1746 if (status == 0)
1747 success++;
1748 else
1749 errors++;
1750 }
1751 else
1752 {
1753 WARNING ("java plugin: Option `%s' not allowed here.", child->key);
1754 errors++;
1755 }
1756 }
1758 DEBUG ("java plugin: jvm_argc = %zu;", jvm_argc);
1759 DEBUG ("java plugin: java_classes_list_len = %zu;", java_classes_list_len);
1760 DEBUG ("java plugin: java_plugin_configs_num = %zu;",
1761 java_plugin_configs_num);
1763 if ((success == 0) && (errors > 0))
1764 {
1765 ERROR ("java plugin: All statements failed.");
1766 return (-1);
1767 }
1769 return (0);
1770 } /* }}} int cjni_config */
1772 static int cjni_read (user_data_t *ud) /* {{{ */
1773 {
1774 JNIEnv *jvm_env;
1775 cjni_callback_info_t *cbi;
1776 int status;
1778 if (jvm == NULL)
1779 {
1780 ERROR ("java plugin: cjni_read: jvm == NULL");
1781 return (-1);
1782 }
1784 if ((ud == NULL) || (ud->data == NULL))
1785 {
1786 ERROR ("java plugin: cjni_read: Invalid user data.");
1787 return (-1);
1788 }
1790 jvm_env = cjni_thread_attach ();
1791 if (jvm_env == NULL)
1792 return (-1);
1794 cbi = (cjni_callback_info_t *) ud->data;
1796 status = (*jvm_env)->CallIntMethod (jvm_env, cbi->object,
1797 cbi->method);
1799 status = cjni_thread_detach ();
1800 if (status != 0)
1801 {
1802 ERROR ("java plugin: cjni_read: cjni_thread_detach failed.");
1803 return (-1);
1804 }
1806 return (status);
1807 } /* }}} int cjni_read */
1809 static int cjni_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
1810 user_data_t *ud)
1811 {
1812 JNIEnv *jvm_env;
1813 cjni_callback_info_t *cbi;
1814 jobject vl_java;
1815 int status;
1817 if (jvm == NULL)
1818 {
1819 ERROR ("java plugin: cjni_write: jvm == NULL");
1820 return (-1);
1821 }
1823 if ((ud == NULL) || (ud->data == NULL))
1824 {
1825 ERROR ("java plugin: cjni_write: Invalid user data.");
1826 return (-1);
1827 }
1829 jvm_env = cjni_thread_attach ();
1830 if (jvm_env == NULL)
1831 return (-1);
1833 cbi = (cjni_callback_info_t *) ud->data;
1835 vl_java = ctoj_value_list (jvm_env, ds, vl);
1836 if (vl_java == NULL)
1837 {
1838 ERROR ("java plugin: cjni_write: ctoj_value_list failed.");
1839 return (-1);
1840 }
1842 status = (*jvm_env)->CallIntMethod (jvm_env,
1843 cbi->object, cbi->method, vl_java);
1845 (*jvm_env)->DeleteLocalRef (jvm_env, vl_java);
1847 status = cjni_thread_detach ();
1848 if (status != 0)
1849 {
1850 ERROR ("java plugin: cjni_write: cjni_thread_detach failed.");
1851 return (-1);
1852 }
1854 return (status);
1855 } /* }}} int cjni_write */
1858 static int cjni_load_plugins (JNIEnv *jvm_env) /* {{{ */
1859 {
1860 size_t i;
1862 for (i = 0; i < java_classes_list_len; i++)
1863 {
1864 java_plugin_class_t *class;
1865 jmethodID constructor_id;
1867 class = java_classes_list + i;
1869 DEBUG ("java plugin: Loading class %s", class->name);
1871 class->class = (*jvm_env)->FindClass (jvm_env, class->name);
1872 if (class->class == NULL)
1873 {
1874 ERROR ("java plugin: cjni_load_plugins: FindClass (%s) failed.",
1875 class->name);
1876 continue;
1877 }
1879 constructor_id = (*jvm_env)->GetMethodID (jvm_env, class->class,
1880 "<init>", "()V");
1881 if (constructor_id == NULL)
1882 {
1883 ERROR ("java plugin: cjni_load_plugins: Could not find the constructor for `%s'.",
1884 class->name);
1885 continue;
1886 }
1888 class->object = (*jvm_env)->NewObject (jvm_env, class->class,
1889 constructor_id);
1890 if (class->object == NULL)
1891 {
1892 ERROR ("java plugin: cjni_load_plugins: Could create a new `%s' object.",
1893 class->name);
1894 continue;
1895 }
1897 (*jvm_env)->NewGlobalRef (jvm_env, class->object);
1898 } /* for (i = 0; i < java_classes_list_len; i++) */
1900 return (0);
1901 } /* }}} int cjni_load_plugins */
1903 static int cjni_config_plugins (JNIEnv *jvm_env) /* {{{ */
1904 {
1905 int status;
1906 size_t i;
1907 size_t j;
1909 for (i = 0; i < java_plugin_configs_num; i++)
1910 {
1911 jobject o_ocitem;
1913 if (java_plugin_configs[i].ci == NULL)
1914 continue;
1916 for (j = 0; j < java_callbacks_num; j++)
1917 {
1918 if (java_callbacks[j].type != CB_TYPE_CONFIG)
1919 continue;
1921 if (strcmp (java_plugin_configs[i].name, java_callbacks[j].name) == 0)
1922 break;
1923 }
1925 if (j >= java_callbacks_num)
1926 {
1927 NOTICE ("java plugin: Configuration for `%s' is present, but no such "
1928 "configuration callback has been registered.",
1929 java_plugin_configs[i].name);
1930 continue;
1931 }
1933 DEBUG ("java plugin: Configuring %s", java_plugin_configs[i].name);
1935 o_ocitem = ctoj_oconfig_item (jvm_env, java_plugin_configs[i].ci);
1936 if (o_ocitem == NULL)
1937 {
1938 ERROR ("java plugin: cjni_config_plugins: ctoj_oconfig_item failed.");
1939 continue;
1940 }
1942 status = (*jvm_env)->CallIntMethod (jvm_env,
1943 java_callbacks[j].object, java_callbacks[j].method, o_ocitem);
1944 WARNING ("java plugin: Config callback for `%s' returned status %i.",
1945 java_plugin_configs[i].name, status);
1946 } /* for (i = 0; i < java_plugin_configs; i++) */
1948 return (0);
1949 } /* }}} int cjni_config_plugins */
1951 static int cjni_init_plugins (JNIEnv *jvm_env) /* {{{ */
1952 {
1953 int status;
1954 size_t i;
1956 for (i = 0; i < java_callbacks_num; i++)
1957 {
1958 if (java_callbacks[i].type != CB_TYPE_INIT)
1959 continue;
1961 DEBUG ("java plugin: Initializing %s", java_callbacks[i].name);
1963 status = (*jvm_env)->CallIntMethod (jvm_env,
1964 java_callbacks[i].object, java_callbacks[i].method);
1965 if (status != 0)
1966 {
1967 ERROR ("java plugin: Initializing `%s' failed with status %i. "
1968 "Removing read function.",
1969 java_callbacks[i].name, status);
1970 plugin_unregister_read (java_callbacks[i].name);
1971 }
1972 }
1974 return (0);
1975 } /* }}} int cjni_init_plugins */
1977 static int cjni_shutdown_plugins (JNIEnv *jvm_env) /* {{{ */
1978 {
1979 int status;
1980 size_t i;
1982 for (i = 0; i < java_callbacks_num; i++)
1983 {
1984 if (java_callbacks[i].type != CB_TYPE_SHUTDOWN)
1985 continue;
1987 DEBUG ("java plugin: Shutting down %s", java_callbacks[i].name);
1989 status = (*jvm_env)->CallIntMethod (jvm_env,
1990 java_callbacks[i].object, java_callbacks[i].method);
1991 if (status != 0)
1992 {
1993 ERROR ("java plugin: Shutting down `%s' failed with status %i. ",
1994 java_callbacks[i].name, status);
1995 }
1996 }
1998 return (0);
1999 } /* }}} int cjni_shutdown_plugins */
2002 static int cjni_shutdown (void) /* {{{ */
2003 {
2004 JNIEnv *jvm_env;
2005 JavaVMAttachArgs args;
2006 int status;
2007 size_t i;
2009 if (jvm == NULL)
2010 return (0);
2012 jvm_env = NULL;
2013 memset (&args, 0, sizeof (args));
2014 args.version = JNI_VERSION_1_2;
2016 status = (*jvm)->AttachCurrentThread (jvm, (void **) &jvm_env, &args);
2017 if (status != 0)
2018 {
2019 ERROR ("java plugin: cjni_shutdown: AttachCurrentThread failed with status %i.",
2020 status);
2021 return (-1);
2022 }
2024 /* Execute all the shutdown functions registered by plugins. */
2025 cjni_shutdown_plugins (jvm_env);
2027 /* Release all the global references to callback functions */
2028 for (i = 0; i < java_callbacks_num; i++)
2029 {
2030 if (java_callbacks[i].object != NULL)
2031 {
2032 (*jvm_env)->DeleteGlobalRef (jvm_env, java_callbacks[i].object);
2033 java_callbacks[i].object = NULL;
2034 }
2035 sfree (java_callbacks[i].name);
2036 }
2037 java_callbacks_num = 0;
2038 sfree (java_callbacks);
2040 /* Release all the global references to directly loaded classes. */
2041 for (i = 0; i < java_classes_list_len; i++)
2042 {
2043 if (java_classes_list[i].object != NULL)
2044 {
2045 (*jvm_env)->DeleteGlobalRef (jvm_env, java_classes_list[i].object);
2046 java_classes_list[i].object = NULL;
2047 }
2048 sfree (java_classes_list[i].name);
2049 }
2050 java_classes_list_len = 0;
2051 sfree (java_classes_list);
2053 /* Destroy the JVM */
2054 (*jvm)->DestroyJavaVM (jvm);
2055 jvm = NULL;
2056 jvm_env = NULL;
2058 pthread_key_delete (jvm_env_key);
2060 /* Free the JVM argument list */
2061 for (i = 0; i < jvm_argc; i++)
2062 sfree (jvm_argv[i]);
2063 jvm_argc = 0;
2064 sfree (jvm_argv);
2066 /* Free the copied configuration */
2067 for (i = 0; i < java_plugin_configs_num; i++)
2068 {
2069 sfree (java_plugin_configs[i].name);
2070 oconfig_free (java_plugin_configs[i].ci);
2071 }
2072 java_plugin_configs_num = 0;
2073 sfree (java_plugin_configs);
2075 return (0);
2076 } /* }}} int cjni_shutdown */
2078 static int cjni_init_native (JNIEnv *jvm_env) /* {{{ */
2079 {
2080 jclass api_class_ptr;
2081 int status;
2083 api_class_ptr = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.CollectdAPI");
2084 if (api_class_ptr == NULL)
2085 {
2086 ERROR ("cjni_init_native: Cannot find API class `org.collectd.api.CollectdAPI'.");
2087 return (-1);
2088 }
2090 status = (*jvm_env)->RegisterNatives (jvm_env, api_class_ptr,
2091 jni_api_functions, (jint) jni_api_functions_num);
2092 if (status != 0)
2093 {
2094 ERROR ("cjni_init_native: RegisterNatives failed with status %i.", status);
2095 return (-1);
2096 }
2098 return (0);
2099 } /* }}} int cjni_init_native */
2101 static int cjni_init (void) /* {{{ */
2102 {
2103 JNIEnv *jvm_env;
2104 JavaVMInitArgs vm_args;
2105 JavaVMOption vm_options[jvm_argc];
2107 int status;
2108 size_t i;
2110 if (jvm != NULL)
2111 return (0);
2113 status = pthread_key_create (&jvm_env_key, cjni_jvm_env_destroy);
2114 if (status != 0)
2115 {
2116 ERROR ("java plugin: cjni_init: pthread_key_create failed "
2117 "with status %i.", status);
2118 return (-1);
2119 }
2121 jvm_env = NULL;
2123 memset (&vm_args, 0, sizeof (vm_args));
2124 vm_args.version = JNI_VERSION_1_2;
2125 vm_args.options = vm_options;
2126 vm_args.nOptions = (jint) jvm_argc;
2128 for (i = 0; i < jvm_argc; i++)
2129 {
2130 DEBUG ("java plugin: cjni_init: jvm_argv[%zu] = %s", i, jvm_argv[i]);
2131 vm_args.options[i].optionString = jvm_argv[i];
2132 }
2133 /*
2134 vm_args.options[0].optionString = "-verbose:jni";
2135 vm_args.options[1].optionString = "-Djava.class.path=/home/octo/collectd/bindings/java";
2136 */
2138 status = JNI_CreateJavaVM (&jvm, (void **) &jvm_env, (void **) &vm_args);
2139 if (status != 0)
2140 {
2141 ERROR ("cjni_init: JNI_CreateJavaVM failed with status %i.",
2142 status);
2143 return (-1);
2144 }
2145 assert (jvm != NULL);
2146 assert (jvm_env != NULL);
2148 /* Call RegisterNatives */
2149 status = cjni_init_native (jvm_env);
2150 if (status != 0)
2151 {
2152 ERROR ("cjni_init: cjni_init_native failed.");
2153 return (-1);
2154 }
2156 cjni_load_plugins (jvm_env);
2157 cjni_config_plugins (jvm_env);
2158 cjni_init_plugins (jvm_env);
2160 return (0);
2161 } /* }}} int cjni_init */
2163 void module_register (void)
2164 {
2165 plugin_register_complex_config ("java", cjni_config);
2166 plugin_register_init ("java", cjni_init);
2167 plugin_register_shutdown ("java", cjni_shutdown);
2168 } /* void module_register (void) */
2170 /* vim: set sw=2 sts=2 et fdm=marker : */