2 * collectd - src/java.c
3 * Copyright (C) 2009 Florian octo Forster
4 * Copyright (C) 2008 Justo Alonso Achaques
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.
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.
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
20 * Florian octo Forster <octo at collectd.org>
21 * Justo Alonso Achaques <justo.alonso at gmail.com>
27 #include "filter_chain.h"
32 #if !defined(JNI_VERSION_1_2)
33 #error "Need JNI 1.2 compatible interface!"
39 struct cjni_jvm_env_s /* {{{ */
42 int reference_counter;
44 typedef struct cjni_jvm_env_s cjni_jvm_env_t;
47 struct java_plugin_class_s /* {{{ */
53 typedef struct java_plugin_class_s java_plugin_class_t;
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
63 #define CB_TYPE_NOTIFICATION 8
64 #define CB_TYPE_MATCH 9
65 #define CB_TYPE_TARGET 10
66 struct cjni_callback_info_s /* {{{ */
74 typedef struct cjni_callback_info_s cjni_callback_info_t;
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;
101 * Mostly functions that are needed by the Java interface (``native'')
104 static void cjni_callback_info_destroy(void *arg);
105 static cjni_callback_info_t *cjni_callback_info_create(JNIEnv *jvm_env,
109 static int cjni_callback_register(JNIEnv *jvm_env, jobject o_name,
110 jobject o_callback, int type);
111 static int cjni_read(user_data_t *user_data);
112 static int cjni_write(const data_set_t *ds, const value_list_t *vl,
114 static int cjni_flush(cdtime_t timeout, const char *identifier,
116 static void cjni_log(int severity, const char *message, user_data_t *ud);
117 static int cjni_notification(const notification_t *n, user_data_t *ud);
119 /* Create, destroy, and match/invoke functions, used by both, matches AND
121 static int cjni_match_target_create(const oconfig_item_t *ci, void **user_data);
122 static int cjni_match_target_destroy(void **user_data);
123 static int cjni_match_target_invoke(const data_set_t *ds, value_list_t *vl,
124 notification_meta_t **meta,
128 * C to Java conversion functions
130 static int ctoj_string(JNIEnv *jvm_env, /* {{{ */
131 const char *string, jclass class_ptr, jobject object_ptr,
132 const char *method_name) {
136 /* Create a java.lang.String */
137 o_string = (*jvm_env)->NewStringUTF(jvm_env, (string != NULL) ? string : "");
138 if (o_string == NULL) {
139 ERROR("java plugin: ctoj_string: NewStringUTF failed.");
143 /* Search for the `void setFoo (String s)' method. */
144 m_set = (*jvm_env)->GetMethodID(jvm_env, class_ptr, method_name,
145 "(Ljava/lang/String;)V");
147 ERROR("java plugin: ctoj_string: Cannot find method `void %s (String)'.",
149 (*jvm_env)->DeleteLocalRef(jvm_env, o_string);
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);
160 } /* }}} int ctoj_string */
162 static jstring ctoj_output_string(JNIEnv *jvm_env, /* {{{ */
163 const char *string) {
166 /* Create a java.lang.String */
167 o_string = (*jvm_env)->NewStringUTF(jvm_env, (string != NULL) ? string : "");
168 if (o_string == NULL) {
169 ERROR("java plugin: ctoj_output_string: NewStringUTF failed.");
174 } /* }}} int ctoj_output_string */
176 static int ctoj_int(JNIEnv *jvm_env, /* {{{ */
177 jint value, jclass class_ptr, jobject object_ptr,
178 const char *method_name) {
181 /* Search for the `void setFoo (int i)' method. */
182 m_set = (*jvm_env)->GetMethodID(jvm_env, class_ptr, method_name, "(I)V");
184 ERROR("java plugin: ctoj_int: Cannot find method `void %s (int)'.",
189 (*jvm_env)->CallVoidMethod(jvm_env, object_ptr, m_set, value);
192 } /* }}} int ctoj_int */
194 static int ctoj_long(JNIEnv *jvm_env, /* {{{ */
195 jlong value, jclass class_ptr, jobject object_ptr,
196 const char *method_name) {
199 /* Search for the `void setFoo (long l)' method. */
200 m_set = (*jvm_env)->GetMethodID(jvm_env, class_ptr, method_name, "(J)V");
202 ERROR("java plugin: ctoj_long: Cannot find method `void %s (long)'.",
207 (*jvm_env)->CallVoidMethod(jvm_env, object_ptr, m_set, value);
210 } /* }}} int ctoj_long */
212 static int ctoj_double(JNIEnv *jvm_env, /* {{{ */
213 jdouble value, jclass class_ptr, jobject object_ptr,
214 const char *method_name) {
217 /* Search for the `void setFoo (double d)' method. */
218 m_set = (*jvm_env)->GetMethodID(jvm_env, class_ptr, method_name, "(D)V");
220 ERROR("java plugin: ctoj_double: Cannot find method `void %s (double)'.",
225 (*jvm_env)->CallVoidMethod(jvm_env, object_ptr, m_set, value);
228 } /* }}} int ctoj_double */
230 /* Convert a jlong to a java.lang.Number */
231 static jobject ctoj_jlong_to_number(JNIEnv *jvm_env, jlong value) /* {{{ */
234 jmethodID m_long_constructor;
236 /* Look up the java.lang.Long class */
237 c_long = (*jvm_env)->FindClass(jvm_env, "java/lang/Long");
238 if (c_long == NULL) {
239 ERROR("java plugin: ctoj_jlong_to_number: Looking up the "
240 "java.lang.Long class failed.");
245 (*jvm_env)->GetMethodID(jvm_env, c_long, "<init>", "(J)V");
246 if (m_long_constructor == NULL) {
247 ERROR("java plugin: ctoj_jlong_to_number: Looking up the "
248 "`Long (long)' constructor failed.");
252 return (*jvm_env)->NewObject(jvm_env, c_long, m_long_constructor, value);
253 } /* }}} jobject ctoj_jlong_to_number */
255 /* Convert a jdouble to a java.lang.Number */
256 static jobject ctoj_jdouble_to_number(JNIEnv *jvm_env, jdouble value) /* {{{ */
259 jmethodID m_double_constructor;
261 /* Look up the java.lang.Long class */
262 c_double = (*jvm_env)->FindClass(jvm_env, "java/lang/Double");
263 if (c_double == NULL) {
264 ERROR("java plugin: ctoj_jdouble_to_number: Looking up the "
265 "java.lang.Double class failed.");
269 m_double_constructor =
270 (*jvm_env)->GetMethodID(jvm_env, c_double, "<init>", "(D)V");
271 if (m_double_constructor == NULL) {
272 ERROR("java plugin: ctoj_jdouble_to_number: Looking up the "
273 "`Double (double)' constructor failed.");
277 return (*jvm_env)->NewObject(jvm_env, c_double, m_double_constructor, value);
278 } /* }}} jobject ctoj_jdouble_to_number */
280 /* Convert a value_t to a java.lang.Number */
281 static jobject ctoj_value_to_number(JNIEnv *jvm_env, /* {{{ */
282 value_t value, int ds_type) {
283 if (ds_type == DS_TYPE_COUNTER)
284 return ctoj_jlong_to_number(jvm_env, (jlong)value.counter);
285 else if (ds_type == DS_TYPE_GAUGE)
286 return ctoj_jdouble_to_number(jvm_env, (jdouble)value.gauge);
287 if (ds_type == DS_TYPE_DERIVE)
288 return ctoj_jlong_to_number(jvm_env, (jlong)value.derive);
289 if (ds_type == DS_TYPE_ABSOLUTE)
290 return ctoj_jlong_to_number(jvm_env, (jlong)value.absolute);
293 } /* }}} jobject ctoj_value_to_number */
295 /* Convert a data_source_t to a org/collectd/api/DataSource */
296 static jobject ctoj_data_source(JNIEnv *jvm_env, /* {{{ */
297 const data_source_t *dsrc) {
299 jmethodID m_datasource_constructor;
300 jobject o_datasource;
303 /* Look up the DataSource class */
304 c_datasource = (*jvm_env)->FindClass(jvm_env, "org/collectd/api/DataSource");
305 if (c_datasource == NULL) {
306 ERROR("java plugin: ctoj_data_source: "
307 "FindClass (org/collectd/api/DataSource) failed.");
311 /* Lookup the `ValueList ()' constructor. */
312 m_datasource_constructor =
313 (*jvm_env)->GetMethodID(jvm_env, c_datasource, "<init>", "()V");
314 if (m_datasource_constructor == NULL) {
315 ERROR("java plugin: ctoj_data_source: Cannot find the "
316 "`DataSource ()' constructor.");
320 /* Create a new instance. */
322 (*jvm_env)->NewObject(jvm_env, c_datasource, m_datasource_constructor);
323 if (o_datasource == NULL) {
324 ERROR("java plugin: ctoj_data_source: "
325 "Creating a new DataSource instance failed.");
329 /* Set name via `void setName (String name)' */
331 ctoj_string(jvm_env, dsrc->name, c_datasource, o_datasource, "setName");
333 ERROR("java plugin: ctoj_data_source: "
334 "ctoj_string (setName) failed.");
335 (*jvm_env)->DeleteLocalRef(jvm_env, o_datasource);
339 /* Set type via `void setType (int type)' */
340 status = ctoj_int(jvm_env, dsrc->type, c_datasource, o_datasource, "setType");
342 ERROR("java plugin: ctoj_data_source: "
343 "ctoj_int (setType) failed.");
344 (*jvm_env)->DeleteLocalRef(jvm_env, o_datasource);
348 /* Set min via `void setMin (double min)' */
350 ctoj_double(jvm_env, dsrc->min, c_datasource, o_datasource, "setMin");
352 ERROR("java plugin: ctoj_data_source: "
353 "ctoj_double (setMin) failed.");
354 (*jvm_env)->DeleteLocalRef(jvm_env, o_datasource);
358 /* Set max via `void setMax (double max)' */
360 ctoj_double(jvm_env, dsrc->max, c_datasource, o_datasource, "setMax");
362 ERROR("java plugin: ctoj_data_source: "
363 "ctoj_double (setMax) failed.");
364 (*jvm_env)->DeleteLocalRef(jvm_env, o_datasource);
369 } /* }}} jobject ctoj_data_source */
371 /* Convert a oconfig_value_t to a org/collectd/api/OConfigValue */
372 static jobject ctoj_oconfig_value(JNIEnv *jvm_env, /* {{{ */
373 oconfig_value_t ocvalue) {
375 jmethodID m_ocvalue_constructor;
379 m_ocvalue_constructor = NULL;
382 c_ocvalue = (*jvm_env)->FindClass(jvm_env, "org/collectd/api/OConfigValue");
383 if (c_ocvalue == NULL) {
384 ERROR("java plugin: ctoj_oconfig_value: "
385 "FindClass (org/collectd/api/OConfigValue) failed.");
389 if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) {
390 jboolean tmp_boolean;
392 tmp_boolean = (ocvalue.value.boolean == 0) ? JNI_FALSE : JNI_TRUE;
394 m_ocvalue_constructor =
395 (*jvm_env)->GetMethodID(jvm_env, c_ocvalue, "<init>", "(Z)V");
396 if (m_ocvalue_constructor == NULL) {
397 ERROR("java plugin: ctoj_oconfig_value: Cannot find the "
398 "`OConfigValue (boolean)' constructor.");
402 return (*jvm_env)->NewObject(jvm_env, c_ocvalue, m_ocvalue_constructor,
404 } /* if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) */
405 else if (ocvalue.type == OCONFIG_TYPE_STRING) {
406 m_ocvalue_constructor = (*jvm_env)->GetMethodID(
407 jvm_env, c_ocvalue, "<init>", "(Ljava/lang/String;)V");
408 if (m_ocvalue_constructor == NULL) {
409 ERROR("java plugin: ctoj_oconfig_value: Cannot find the "
410 "`OConfigValue (String)' constructor.");
414 o_argument = (*jvm_env)->NewStringUTF(jvm_env, ocvalue.value.string);
415 if (o_argument == NULL) {
416 ERROR("java plugin: ctoj_oconfig_value: "
417 "Creating a String object failed.");
420 } else if (ocvalue.type == OCONFIG_TYPE_NUMBER) {
421 m_ocvalue_constructor = (*jvm_env)->GetMethodID(
422 jvm_env, c_ocvalue, "<init>", "(Ljava/lang/Number;)V");
423 if (m_ocvalue_constructor == NULL) {
424 ERROR("java plugin: ctoj_oconfig_value: Cannot find the "
425 "`OConfigValue (Number)' constructor.");
429 o_argument = ctoj_jdouble_to_number(jvm_env, (jdouble)ocvalue.value.number);
430 if (o_argument == NULL) {
431 ERROR("java plugin: ctoj_oconfig_value: "
432 "Creating a Number object failed.");
439 assert(m_ocvalue_constructor != NULL);
440 assert(o_argument != NULL);
442 o_ocvalue = (*jvm_env)->NewObject(jvm_env, c_ocvalue, m_ocvalue_constructor,
444 if (o_ocvalue == NULL) {
445 ERROR("java plugin: ctoj_oconfig_value: "
446 "Creating an OConfigValue object failed.");
447 (*jvm_env)->DeleteLocalRef(jvm_env, o_argument);
451 (*jvm_env)->DeleteLocalRef(jvm_env, o_argument);
453 } /* }}} jobject ctoj_oconfig_value */
455 /* Convert a oconfig_item_t to a org/collectd/api/OConfigItem */
456 static jobject ctoj_oconfig_item(JNIEnv *jvm_env, /* {{{ */
457 const oconfig_item_t *ci) {
459 jmethodID m_ocitem_constructor;
460 jmethodID m_addvalue;
461 jmethodID m_addchild;
465 c_ocitem = (*jvm_env)->FindClass(jvm_env, "org/collectd/api/OConfigItem");
466 if (c_ocitem == NULL) {
467 ERROR("java plugin: ctoj_oconfig_item: "
468 "FindClass (org/collectd/api/OConfigItem) failed.");
472 /* Get the required methods: m_ocitem_constructor, m_addvalue, and m_addchild
474 m_ocitem_constructor = (*jvm_env)->GetMethodID(jvm_env, c_ocitem, "<init>",
475 "(Ljava/lang/String;)V");
476 if (m_ocitem_constructor == NULL) {
477 ERROR("java plugin: ctoj_oconfig_item: Cannot find the "
478 "`OConfigItem (String)' constructor.");
482 m_addvalue = (*jvm_env)->GetMethodID(jvm_env, c_ocitem, "addValue",
483 "(Lorg/collectd/api/OConfigValue;)V");
484 if (m_addvalue == NULL) {
485 ERROR("java plugin: ctoj_oconfig_item: Cannot find the "
486 "`addValue (OConfigValue)' method.");
490 m_addchild = (*jvm_env)->GetMethodID(jvm_env, c_ocitem, "addChild",
491 "(Lorg/collectd/api/OConfigItem;)V");
492 if (m_addchild == NULL) {
493 ERROR("java plugin: ctoj_oconfig_item: Cannot find the "
494 "`addChild (OConfigItem)' method.");
499 /* Create a String object with the key.
500 * Needed for calling the constructor. */
501 o_key = (*jvm_env)->NewStringUTF(jvm_env, ci->key);
503 ERROR("java plugin: ctoj_oconfig_item: "
504 "Creating String object failed.");
508 /* Create an OConfigItem object */
510 (*jvm_env)->NewObject(jvm_env, c_ocitem, m_ocitem_constructor, o_key);
511 if (o_ocitem == NULL) {
512 ERROR("java plugin: ctoj_oconfig_item: "
513 "Creating an OConfigItem object failed.");
514 (*jvm_env)->DeleteLocalRef(jvm_env, o_key);
518 /* We don't need the String object any longer.. */
519 (*jvm_env)->DeleteLocalRef(jvm_env, o_key);
521 /* Call OConfigItem.addValue for each value */
522 for (int i = 0; i < ci->values_num; i++) /* {{{ */
526 o_value = ctoj_oconfig_value(jvm_env, ci->values[i]);
527 if (o_value == NULL) {
528 ERROR("java plugin: ctoj_oconfig_item: "
529 "Creating an OConfigValue object failed.");
530 (*jvm_env)->DeleteLocalRef(jvm_env, o_ocitem);
534 (*jvm_env)->CallVoidMethod(jvm_env, o_ocitem, m_addvalue, o_value);
535 (*jvm_env)->DeleteLocalRef(jvm_env, o_value);
536 } /* }}} for (i = 0; i < ci->values_num; i++) */
538 /* Call OConfigItem.addChild for each child */
539 for (int i = 0; i < ci->children_num; i++) /* {{{ */
543 o_child = ctoj_oconfig_item(jvm_env, ci->children + i);
544 if (o_child == NULL) {
545 ERROR("java plugin: ctoj_oconfig_item: "
546 "Creating an OConfigItem object failed.");
547 (*jvm_env)->DeleteLocalRef(jvm_env, o_ocitem);
551 (*jvm_env)->CallVoidMethod(jvm_env, o_ocitem, m_addchild, o_child);
552 (*jvm_env)->DeleteLocalRef(jvm_env, o_child);
553 } /* }}} for (i = 0; i < ci->children_num; i++) */
556 } /* }}} jobject ctoj_oconfig_item */
558 /* Convert a data_set_t to a org/collectd/api/DataSet */
559 static jobject ctoj_data_set(JNIEnv *jvm_env, const data_set_t *ds) /* {{{ */
562 jmethodID m_constructor;
567 /* Look up the org/collectd/api/DataSet class */
568 c_dataset = (*jvm_env)->FindClass(jvm_env, "org/collectd/api/DataSet");
569 if (c_dataset == NULL) {
570 ERROR("java plugin: ctoj_data_set: Looking up the "
571 "org/collectd/api/DataSet class failed.");
575 /* Search for the `DataSet (String type)' constructor. */
576 m_constructor = (*jvm_env)->GetMethodID(jvm_env, c_dataset, "<init>",
577 "(Ljava/lang/String;)V");
578 if (m_constructor == NULL) {
579 ERROR("java plugin: ctoj_data_set: Looking up the "
580 "`DataSet (String)' constructor failed.");
584 /* Search for the `void addDataSource (DataSource)' method. */
585 m_add = (*jvm_env)->GetMethodID(jvm_env, c_dataset, "addDataSource",
586 "(Lorg/collectd/api/DataSource;)V");
588 ERROR("java plugin: ctoj_data_set: Looking up the "
589 "`addDataSource (DataSource)' method failed.");
593 o_type = (*jvm_env)->NewStringUTF(jvm_env, ds->type);
594 if (o_type == NULL) {
595 ERROR("java plugin: ctoj_data_set: Creating a String object failed.");
599 o_dataset = (*jvm_env)->NewObject(jvm_env, c_dataset, m_constructor, o_type);
600 if (o_dataset == NULL) {
601 ERROR("java plugin: ctoj_data_set: Creating a DataSet object failed.");
602 (*jvm_env)->DeleteLocalRef(jvm_env, o_type);
606 /* Decrease reference counter on the java.lang.String object. */
607 (*jvm_env)->DeleteLocalRef(jvm_env, o_type);
609 for (size_t i = 0; i < ds->ds_num; i++) {
610 jobject o_datasource;
612 o_datasource = ctoj_data_source(jvm_env, ds->ds + i);
613 if (o_datasource == NULL) {
614 ERROR("java plugin: ctoj_data_set: ctoj_data_source (%s.%s) failed",
615 ds->type, ds->ds[i].name);
616 (*jvm_env)->DeleteLocalRef(jvm_env, o_dataset);
620 (*jvm_env)->CallVoidMethod(jvm_env, o_dataset, m_add, o_datasource);
622 (*jvm_env)->DeleteLocalRef(jvm_env, o_datasource);
623 } /* for (i = 0; i < ds->ds_num; i++) */
626 } /* }}} jobject ctoj_data_set */
628 static int ctoj_value_list_add_value(JNIEnv *jvm_env, /* {{{ */
629 value_t value, int ds_type,
630 jclass class_ptr, jobject object_ptr) {
631 jmethodID m_addvalue;
634 m_addvalue = (*jvm_env)->GetMethodID(jvm_env, class_ptr, "addValue",
635 "(Ljava/lang/Number;)V");
636 if (m_addvalue == NULL) {
637 ERROR("java plugin: ctoj_value_list_add_value: "
638 "Cannot find method `void addValue (Number)'.");
642 o_number = ctoj_value_to_number(jvm_env, value, ds_type);
643 if (o_number == NULL) {
644 ERROR("java plugin: ctoj_value_list_add_value: "
645 "ctoj_value_to_number failed.");
649 (*jvm_env)->CallVoidMethod(jvm_env, object_ptr, m_addvalue, o_number);
651 (*jvm_env)->DeleteLocalRef(jvm_env, o_number);
654 } /* }}} int ctoj_value_list_add_value */
656 static int ctoj_value_list_add_data_set(JNIEnv *jvm_env, /* {{{ */
657 jclass c_valuelist, jobject o_valuelist,
658 const data_set_t *ds) {
659 jmethodID m_setdataset;
662 /* Look for the `void setDataSource (List<DataSource> ds)' method. */
663 m_setdataset = (*jvm_env)->GetMethodID(jvm_env, c_valuelist, "setDataSet",
664 "(Lorg/collectd/api/DataSet;)V");
665 if (m_setdataset == NULL) {
666 ERROR("java plugin: ctoj_value_list_add_data_set: "
667 "Cannot find the `void setDataSet (DataSet)' method.");
671 /* Create a DataSet object. */
672 o_dataset = ctoj_data_set(jvm_env, ds);
673 if (o_dataset == NULL) {
674 ERROR("java plugin: ctoj_value_list_add_data_set: "
675 "ctoj_data_set (%s) failed.",
680 /* Actually call the method. */
681 (*jvm_env)->CallVoidMethod(jvm_env, o_valuelist, m_setdataset, o_dataset);
683 /* Decrease reference counter on the List<DataSource> object. */
684 (*jvm_env)->DeleteLocalRef(jvm_env, o_dataset);
687 } /* }}} int ctoj_value_list_add_data_set */
689 /* Convert a value_list_t (and data_set_t) to a org/collectd/api/ValueList */
690 static jobject ctoj_value_list(JNIEnv *jvm_env, /* {{{ */
691 const data_set_t *ds, const value_list_t *vl) {
693 jmethodID m_valuelist_constructor;
697 /* First, create a new ValueList instance..
698 * Look up the class.. */
699 c_valuelist = (*jvm_env)->FindClass(jvm_env, "org/collectd/api/ValueList");
700 if (c_valuelist == NULL) {
701 ERROR("java plugin: ctoj_value_list: "
702 "FindClass (org/collectd/api/ValueList) failed.");
706 /* Lookup the `ValueList ()' constructor. */
707 m_valuelist_constructor =
708 (*jvm_env)->GetMethodID(jvm_env, c_valuelist, "<init>", "()V");
709 if (m_valuelist_constructor == NULL) {
710 ERROR("java plugin: ctoj_value_list: Cannot find the "
711 "`ValueList ()' constructor.");
715 /* Create a new instance. */
717 (*jvm_env)->NewObject(jvm_env, c_valuelist, m_valuelist_constructor);
718 if (o_valuelist == NULL) {
719 ERROR("java plugin: ctoj_value_list: Creating a new ValueList instance "
724 status = ctoj_value_list_add_data_set(jvm_env, c_valuelist, o_valuelist, ds);
726 ERROR("java plugin: ctoj_value_list: "
727 "ctoj_value_list_add_data_set failed.");
728 (*jvm_env)->DeleteLocalRef(jvm_env, o_valuelist);
732 /* Set the strings.. */
733 #define SET_STRING(str, method_name) \
735 status = ctoj_string(jvm_env, str, c_valuelist, o_valuelist, method_name); \
737 ERROR("java plugin: ctoj_value_list: ctoj_string (%s) failed.", \
739 (*jvm_env)->DeleteLocalRef(jvm_env, o_valuelist); \
744 SET_STRING(vl->host, "setHost");
745 SET_STRING(vl->plugin, "setPlugin");
746 SET_STRING(vl->plugin_instance, "setPluginInstance");
747 SET_STRING(vl->type, "setType");
748 SET_STRING(vl->type_instance, "setTypeInstance");
752 /* Set the `time' member. Java stores time in milliseconds. */
753 status = ctoj_long(jvm_env, (jlong)CDTIME_T_TO_MS(vl->time), c_valuelist,
754 o_valuelist, "setTime");
756 ERROR("java plugin: ctoj_value_list: ctoj_long (setTime) failed.");
757 (*jvm_env)->DeleteLocalRef(jvm_env, o_valuelist);
761 /* Set the `interval' member.. */
762 status = ctoj_long(jvm_env, (jlong)CDTIME_T_TO_MS(vl->interval), c_valuelist,
763 o_valuelist, "setInterval");
765 ERROR("java plugin: ctoj_value_list: ctoj_long (setInterval) failed.");
766 (*jvm_env)->DeleteLocalRef(jvm_env, o_valuelist);
770 for (size_t i = 0; i < vl->values_len; i++) {
771 status = ctoj_value_list_add_value(jvm_env, vl->values[i], ds->ds[i].type,
772 c_valuelist, o_valuelist);
774 ERROR("java plugin: ctoj_value_list: "
775 "ctoj_value_list_add_value failed.");
776 (*jvm_env)->DeleteLocalRef(jvm_env, o_valuelist);
782 } /* }}} jobject ctoj_value_list */
784 /* Convert a notification_t to a org/collectd/api/Notification */
785 static jobject ctoj_notification(JNIEnv *jvm_env, /* {{{ */
786 const notification_t *n) {
787 jclass c_notification;
788 jmethodID m_constructor;
789 jobject o_notification;
792 /* First, create a new Notification instance..
793 * Look up the class.. */
795 (*jvm_env)->FindClass(jvm_env, "org/collectd/api/Notification");
796 if (c_notification == NULL) {
797 ERROR("java plugin: ctoj_notification: "
798 "FindClass (org/collectd/api/Notification) failed.");
802 /* Lookup the `Notification ()' constructor. */
804 (*jvm_env)->GetMethodID(jvm_env, c_notification, "<init>", "()V");
805 if (m_constructor == NULL) {
806 ERROR("java plugin: ctoj_notification: Cannot find the "
807 "`Notification ()' constructor.");
811 /* Create a new instance. */
813 (*jvm_env)->NewObject(jvm_env, c_notification, m_constructor);
814 if (o_notification == NULL) {
815 ERROR("java plugin: ctoj_notification: Creating a new Notification "
820 /* Set the strings.. */
821 #define SET_STRING(str, method_name) \
823 status = ctoj_string(jvm_env, str, c_notification, o_notification, \
826 ERROR("java plugin: ctoj_notification: ctoj_string (%s) failed.", \
828 (*jvm_env)->DeleteLocalRef(jvm_env, o_notification); \
833 SET_STRING(n->host, "setHost");
834 SET_STRING(n->plugin, "setPlugin");
835 SET_STRING(n->plugin_instance, "setPluginInstance");
836 SET_STRING(n->type, "setType");
837 SET_STRING(n->type_instance, "setTypeInstance");
838 SET_STRING(n->message, "setMessage");
842 /* Set the `time' member. Java stores time in milliseconds. */
843 status = ctoj_long(jvm_env, (jlong)CDTIME_T_TO_MS(n->time), c_notification,
844 o_notification, "setTime");
846 ERROR("java plugin: ctoj_notification: ctoj_long (setTime) failed.");
847 (*jvm_env)->DeleteLocalRef(jvm_env, o_notification);
851 /* Set the `severity' member.. */
852 status = ctoj_int(jvm_env, (jint)n->severity, c_notification, o_notification,
855 ERROR("java plugin: ctoj_notification: ctoj_int (setSeverity) failed.");
856 (*jvm_env)->DeleteLocalRef(jvm_env, o_notification);
860 return o_notification;
861 } /* }}} jobject ctoj_notification */
864 * Java to C conversion functions
866 /* Call a `String <method> ()' method. */
867 static int jtoc_string(JNIEnv *jvm_env, /* {{{ */
868 char *buffer, size_t buffer_size, int empty_okay,
869 jclass class_ptr, jobject object_ptr,
870 const char *method_name) {
875 method_id = (*jvm_env)->GetMethodID(jvm_env, class_ptr, method_name,
876 "()Ljava/lang/String;");
877 if (method_id == NULL) {
878 ERROR("java plugin: jtoc_string: Cannot find method `String %s ()'.",
883 string_obj = (*jvm_env)->CallObjectMethod(jvm_env, object_ptr, method_id);
884 if ((string_obj == NULL) && (empty_okay == 0)) {
885 ERROR("java plugin: jtoc_string: CallObjectMethod (%s) failed.",
888 } else if ((string_obj == NULL) && (empty_okay != 0)) {
889 memset(buffer, 0, buffer_size);
893 c_str = (*jvm_env)->GetStringUTFChars(jvm_env, string_obj, 0);
895 ERROR("java plugin: jtoc_string: GetStringUTFChars failed.");
896 (*jvm_env)->DeleteLocalRef(jvm_env, string_obj);
900 sstrncpy(buffer, c_str, buffer_size);
902 (*jvm_env)->ReleaseStringUTFChars(jvm_env, string_obj, c_str);
903 (*jvm_env)->DeleteLocalRef(jvm_env, string_obj);
906 } /* }}} int jtoc_string */
908 /* Call an `int <method> ()' method. */
909 static int jtoc_int(JNIEnv *jvm_env, /* {{{ */
910 jint *ret_value, jclass class_ptr, jobject object_ptr,
911 const char *method_name) {
914 method_id = (*jvm_env)->GetMethodID(jvm_env, class_ptr, method_name, "()I");
915 if (method_id == NULL) {
916 ERROR("java plugin: jtoc_int: Cannot find method `int %s ()'.",
921 *ret_value = (*jvm_env)->CallIntMethod(jvm_env, object_ptr, method_id);
924 } /* }}} int jtoc_int */
926 /* Call a `long <method> ()' method. */
927 static int jtoc_long(JNIEnv *jvm_env, /* {{{ */
928 jlong *ret_value, jclass class_ptr, jobject object_ptr,
929 const char *method_name) {
932 method_id = (*jvm_env)->GetMethodID(jvm_env, class_ptr, method_name, "()J");
933 if (method_id == NULL) {
934 ERROR("java plugin: jtoc_long: Cannot find method `long %s ()'.",
939 *ret_value = (*jvm_env)->CallLongMethod(jvm_env, object_ptr, method_id);
942 } /* }}} int jtoc_long */
944 /* Call a `double <method> ()' method. */
945 static int jtoc_double(JNIEnv *jvm_env, /* {{{ */
946 jdouble *ret_value, jclass class_ptr, jobject object_ptr,
947 const char *method_name) {
950 method_id = (*jvm_env)->GetMethodID(jvm_env, class_ptr, method_name, "()D");
951 if (method_id == NULL) {
952 ERROR("java plugin: jtoc_double: Cannot find method `double %s ()'.",
957 *ret_value = (*jvm_env)->CallDoubleMethod(jvm_env, object_ptr, method_id);
960 } /* }}} int jtoc_double */
962 static int jtoc_value(JNIEnv *jvm_env, /* {{{ */
963 value_t *ret_value, int ds_type, jobject object_ptr) {
967 class_ptr = (*jvm_env)->GetObjectClass(jvm_env, object_ptr);
969 if (ds_type == DS_TYPE_GAUGE) {
973 jtoc_double(jvm_env, &tmp_double, class_ptr, object_ptr, "doubleValue");
975 ERROR("java plugin: jtoc_value: "
976 "jtoc_double failed.");
979 (*ret_value).gauge = (gauge_t)tmp_double;
983 status = jtoc_long(jvm_env, &tmp_long, class_ptr, object_ptr, "longValue");
985 ERROR("java plugin: jtoc_value: "
986 "jtoc_long failed.");
990 if (ds_type == DS_TYPE_DERIVE)
991 (*ret_value).derive = (derive_t)tmp_long;
992 else if (ds_type == DS_TYPE_ABSOLUTE)
993 (*ret_value).absolute = (absolute_t)tmp_long;
995 (*ret_value).counter = (counter_t)tmp_long;
999 } /* }}} int jtoc_value */
1001 /* Read a List<Number>, convert it to `value_t' and add it to the given
1002 * `value_list_t'. */
1003 static int jtoc_values_array(JNIEnv *jvm_env, /* {{{ */
1004 const data_set_t *ds, value_list_t *vl,
1005 jclass class_ptr, jobject object_ptr) {
1006 jmethodID m_getvalues;
1007 jmethodID m_toarray;
1009 jobjectArray o_number_array;
1014 values_num = ds->ds_num;
1017 o_number_array = NULL;
1020 #define BAIL_OUT(status) \
1022 if (o_number_array != NULL) \
1023 (*jvm_env)->DeleteLocalRef(jvm_env, o_number_array); \
1024 if (o_list != NULL) \
1025 (*jvm_env)->DeleteLocalRef(jvm_env, o_list); \
1028 /* Call: List<Number> ValueList.getValues () */
1029 m_getvalues = (*jvm_env)->GetMethodID(jvm_env, class_ptr, "getValues",
1030 "()Ljava/util/List;");
1031 if (m_getvalues == NULL) {
1032 ERROR("java plugin: jtoc_values_array: "
1033 "Cannot find method `List getValues ()'.");
1037 o_list = (*jvm_env)->CallObjectMethod(jvm_env, object_ptr, m_getvalues);
1038 if (o_list == NULL) {
1039 ERROR("java plugin: jtoc_values_array: "
1040 "CallObjectMethod (getValues) failed.");
1044 /* Call: Number[] List.toArray () */
1045 m_toarray = (*jvm_env)->GetMethodID(
1046 jvm_env, (*jvm_env)->GetObjectClass(jvm_env, o_list), "toArray",
1047 "()[Ljava/lang/Object;");
1048 if (m_toarray == NULL) {
1049 ERROR("java plugin: jtoc_values_array: "
1050 "Cannot find method `Object[] toArray ()'.");
1054 o_number_array = (*jvm_env)->CallObjectMethod(jvm_env, o_list, m_toarray);
1055 if (o_number_array == NULL) {
1056 ERROR("java plugin: jtoc_values_array: "
1057 "CallObjectMethod (toArray) failed.");
1061 values = (value_t *)calloc(values_num, sizeof(value_t));
1062 if (values == NULL) {
1063 ERROR("java plugin: jtoc_values_array: calloc failed.");
1067 for (int i = 0; i < values_num; i++) {
1072 (*jvm_env)->GetObjectArrayElement(jvm_env, o_number_array, (jsize)i);
1073 if (o_number == NULL) {
1074 ERROR("java plugin: jtoc_values_array: "
1075 "GetObjectArrayElement (%i) failed.",
1080 status = jtoc_value(jvm_env, values + i, ds->ds[i].type, o_number);
1082 ERROR("java plugin: jtoc_values_array: "
1083 "jtoc_value (%i) failed.",
1087 } /* for (i = 0; i < values_num; i++) */
1089 vl->values = values;
1090 vl->values_len = values_num;
1093 (*jvm_env)->DeleteLocalRef(jvm_env, o_number_array);
1094 (*jvm_env)->DeleteLocalRef(jvm_env, o_list);
1096 } /* }}} int jtoc_values_array */
1098 /* Convert a org/collectd/api/ValueList to a value_list_t. */
1099 static int jtoc_value_list(JNIEnv *jvm_env, value_list_t *vl, /* {{{ */
1100 jobject object_ptr) {
1104 const data_set_t *ds;
1106 class_ptr = (*jvm_env)->GetObjectClass(jvm_env, object_ptr);
1107 if (class_ptr == NULL) {
1108 ERROR("java plugin: jtoc_value_list: GetObjectClass failed.");
1112 /* eo == empty okay */
1113 #define SET_STRING(buffer, method, eo) \
1115 status = jtoc_string(jvm_env, buffer, sizeof(buffer), eo, class_ptr, \
1116 object_ptr, method); \
1117 if (status != 0) { \
1118 ERROR("java plugin: jtoc_value_list: jtoc_string (%s) failed.", method); \
1123 SET_STRING(vl->type, "getType", /* empty = */ 0);
1125 ds = plugin_get_ds(vl->type);
1127 ERROR("java plugin: jtoc_value_list: Data-set `%s' is not defined. "
1128 "Please consult the types.db(5) manpage for mor information.",
1133 SET_STRING(vl->host, "getHost", /* empty = */ 0);
1134 SET_STRING(vl->plugin, "getPlugin", /* empty = */ 0);
1135 SET_STRING(vl->plugin_instance, "getPluginInstance", /* empty = */ 1);
1136 SET_STRING(vl->type_instance, "getTypeInstance", /* empty = */ 1);
1140 status = jtoc_long(jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1142 ERROR("java plugin: jtoc_value_list: jtoc_long (getTime) failed.");
1145 /* Java measures time in milliseconds. */
1146 vl->time = MS_TO_CDTIME_T(tmp_long);
1148 status = jtoc_long(jvm_env, &tmp_long, class_ptr, object_ptr, "getInterval");
1150 ERROR("java plugin: jtoc_value_list: jtoc_long (getInterval) failed.");
1153 vl->interval = MS_TO_CDTIME_T(tmp_long);
1155 status = jtoc_values_array(jvm_env, ds, vl, class_ptr, object_ptr);
1157 ERROR("java plugin: jtoc_value_list: jtoc_values_array failed.");
1162 } /* }}} int jtoc_value_list */
1164 /* Convert a org/collectd/api/Notification to a notification_t. */
1165 static int jtoc_notification(JNIEnv *jvm_env, notification_t *n, /* {{{ */
1166 jobject object_ptr) {
1172 class_ptr = (*jvm_env)->GetObjectClass(jvm_env, object_ptr);
1173 if (class_ptr == NULL) {
1174 ERROR("java plugin: jtoc_notification: GetObjectClass failed.");
1178 /* eo == empty okay */
1179 #define SET_STRING(buffer, method, eo) \
1181 status = jtoc_string(jvm_env, buffer, sizeof(buffer), eo, class_ptr, \
1182 object_ptr, method); \
1183 if (status != 0) { \
1184 ERROR("java plugin: jtoc_notification: jtoc_string (%s) failed.", \
1190 SET_STRING(n->host, "getHost", /* empty = */ 1);
1191 SET_STRING(n->plugin, "getPlugin", /* empty = */ 1);
1192 SET_STRING(n->plugin_instance, "getPluginInstance", /* empty = */ 1);
1193 SET_STRING(n->type, "getType", /* empty = */ 1);
1194 SET_STRING(n->type_instance, "getTypeInstance", /* empty = */ 1);
1195 SET_STRING(n->message, "getMessage", /* empty = */ 0);
1199 status = jtoc_long(jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1201 ERROR("java plugin: jtoc_notification: jtoc_long (getTime) failed.");
1204 /* Java measures time in milliseconds. */
1205 n->time = MS_TO_CDTIME_T(tmp_long);
1207 status = jtoc_int(jvm_env, &tmp_int, class_ptr, object_ptr, "getSeverity");
1209 ERROR("java plugin: jtoc_notification: jtoc_int (getSeverity) failed.");
1212 n->severity = (int)tmp_int;
1215 } /* }}} int jtoc_notification */
1217 * Functions accessible from Java
1219 static jint JNICALL cjni_api_dispatch_values(JNIEnv *jvm_env, /* {{{ */
1220 jobject this, jobject java_vl) {
1221 value_list_t vl = VALUE_LIST_INIT;
1224 DEBUG("cjni_api_dispatch_values: java_vl = %p;", (void *)java_vl);
1226 status = jtoc_value_list(jvm_env, &vl, java_vl);
1228 ERROR("java plugin: cjni_api_dispatch_values: jtoc_value_list failed.");
1232 status = plugin_dispatch_values(&vl);
1237 } /* }}} jint cjni_api_dispatch_values */
1239 static jint JNICALL cjni_api_dispatch_notification(JNIEnv *jvm_env, /* {{{ */
1241 jobject o_notification) {
1242 notification_t n = {0};
1245 status = jtoc_notification(jvm_env, &n, o_notification);
1247 ERROR("java plugin: cjni_api_dispatch_notification: jtoc_notification "
1252 status = plugin_dispatch_notification(&n);
1255 } /* }}} jint cjni_api_dispatch_notification */
1257 static jobject JNICALL cjni_api_get_ds(JNIEnv *jvm_env, /* {{{ */
1258 jobject this, jobject o_string_type) {
1259 const char *ds_name;
1260 const data_set_t *ds;
1263 ds_name = (*jvm_env)->GetStringUTFChars(jvm_env, o_string_type, 0);
1264 if (ds_name == NULL) {
1265 ERROR("java plugin: cjni_api_get_ds: GetStringUTFChars failed.");
1269 ds = plugin_get_ds(ds_name);
1270 DEBUG("java plugin: cjni_api_get_ds: "
1271 "plugin_get_ds (%s) = %p;",
1272 ds_name, (void *)ds);
1274 (*jvm_env)->ReleaseStringUTFChars(jvm_env, o_string_type, ds_name);
1279 o_dataset = ctoj_data_set(jvm_env, ds);
1281 } /* }}} jint cjni_api_get_ds */
1283 static jint JNICALL cjni_api_register_config(JNIEnv *jvm_env, /* {{{ */
1284 jobject this, jobject o_name,
1286 return cjni_callback_register(jvm_env, o_name, o_config, CB_TYPE_CONFIG);
1287 } /* }}} jint cjni_api_register_config */
1289 static jint JNICALL cjni_api_register_init(JNIEnv *jvm_env, /* {{{ */
1290 jobject this, jobject o_name,
1292 return cjni_callback_register(jvm_env, o_name, o_config, CB_TYPE_INIT);
1293 } /* }}} jint cjni_api_register_init */
1295 static jint JNICALL cjni_api_register_read(JNIEnv *jvm_env, /* {{{ */
1296 jobject this, jobject o_name,
1298 cjni_callback_info_t *cbi;
1300 cbi = cjni_callback_info_create(jvm_env, o_name, o_read, CB_TYPE_READ);
1304 DEBUG("java plugin: Registering new read callback: %s", cbi->name);
1306 plugin_register_complex_read(
1307 /* group = */ NULL, cbi->name, cjni_read,
1310 .data = cbi, .free_func = cjni_callback_info_destroy,
1313 (*jvm_env)->DeleteLocalRef(jvm_env, o_read);
1316 } /* }}} jint cjni_api_register_read */
1318 static jint JNICALL cjni_api_register_write(JNIEnv *jvm_env, /* {{{ */
1319 jobject this, jobject o_name,
1321 cjni_callback_info_t *cbi;
1323 cbi = cjni_callback_info_create(jvm_env, o_name, o_write, CB_TYPE_WRITE);
1327 DEBUG("java plugin: Registering new write callback: %s", cbi->name);
1329 plugin_register_write(
1330 cbi->name, cjni_write,
1332 .data = cbi, .free_func = cjni_callback_info_destroy,
1335 (*jvm_env)->DeleteLocalRef(jvm_env, o_write);
1338 } /* }}} jint cjni_api_register_write */
1340 static jint JNICALL cjni_api_register_flush(JNIEnv *jvm_env, /* {{{ */
1341 jobject this, jobject o_name,
1343 cjni_callback_info_t *cbi;
1345 cbi = cjni_callback_info_create(jvm_env, o_name, o_flush, CB_TYPE_FLUSH);
1349 DEBUG("java plugin: Registering new flush callback: %s", cbi->name);
1351 plugin_register_flush(
1352 cbi->name, cjni_flush,
1354 .data = cbi, .free_func = cjni_callback_info_destroy,
1357 (*jvm_env)->DeleteLocalRef(jvm_env, o_flush);
1360 } /* }}} jint cjni_api_register_flush */
1362 static jint JNICALL cjni_api_register_shutdown(JNIEnv *jvm_env, /* {{{ */
1363 jobject this, jobject o_name,
1364 jobject o_shutdown) {
1365 return cjni_callback_register(jvm_env, o_name, o_shutdown, CB_TYPE_SHUTDOWN);
1366 } /* }}} jint cjni_api_register_shutdown */
1368 static jint JNICALL cjni_api_register_log(JNIEnv *jvm_env, /* {{{ */
1369 jobject this, jobject o_name,
1371 cjni_callback_info_t *cbi;
1373 cbi = cjni_callback_info_create(jvm_env, o_name, o_log, CB_TYPE_LOG);
1377 DEBUG("java plugin: Registering new log callback: %s", cbi->name);
1379 plugin_register_log(cbi->name, cjni_log,
1381 .data = cbi, .free_func = cjni_callback_info_destroy,
1384 (*jvm_env)->DeleteLocalRef(jvm_env, o_log);
1387 } /* }}} jint cjni_api_register_log */
1389 static jint JNICALL cjni_api_register_notification(JNIEnv *jvm_env, /* {{{ */
1390 jobject this, jobject o_name,
1391 jobject o_notification) {
1392 cjni_callback_info_t *cbi;
1394 cbi = cjni_callback_info_create(jvm_env, o_name, o_notification,
1395 CB_TYPE_NOTIFICATION);
1399 DEBUG("java plugin: Registering new notification callback: %s", cbi->name);
1401 plugin_register_notification(
1402 cbi->name, cjni_notification,
1404 .data = cbi, .free_func = cjni_callback_info_destroy,
1407 (*jvm_env)->DeleteLocalRef(jvm_env, o_notification);
1410 } /* }}} jint cjni_api_register_notification */
1412 static jint JNICALL cjni_api_register_match_target(JNIEnv *jvm_env, /* {{{ */
1413 jobject this, jobject o_name,
1414 jobject o_match, int type) {
1418 c_name = (*jvm_env)->GetStringUTFChars(jvm_env, o_name, 0);
1419 if (c_name == NULL) {
1420 ERROR("java plugin: cjni_api_register_match_target: "
1421 "GetStringUTFChars failed.");
1425 status = cjni_callback_register(jvm_env, o_name, o_match, type);
1427 (*jvm_env)->ReleaseStringUTFChars(jvm_env, o_name, c_name);
1431 if (type == CB_TYPE_MATCH) {
1432 match_proc_t m_proc = {0};
1434 m_proc.create = cjni_match_target_create;
1435 m_proc.destroy = cjni_match_target_destroy;
1436 m_proc.match = (void *)cjni_match_target_invoke;
1438 status = fc_register_match(c_name, m_proc);
1439 } else if (type == CB_TYPE_TARGET) {
1440 target_proc_t t_proc = {0};
1442 t_proc.create = cjni_match_target_create;
1443 t_proc.destroy = cjni_match_target_destroy;
1444 t_proc.invoke = cjni_match_target_invoke;
1446 status = fc_register_target(c_name, t_proc);
1448 ERROR("java plugin: cjni_api_register_match_target: "
1449 "Don't know whether to create a match or a target.");
1450 (*jvm_env)->ReleaseStringUTFChars(jvm_env, o_name, c_name);
1455 ERROR("java plugin: cjni_api_register_match_target: "
1457 (type == CB_TYPE_MATCH) ? "fc_register_match" : "fc_register_target");
1458 (*jvm_env)->ReleaseStringUTFChars(jvm_env, o_name, c_name);
1462 (*jvm_env)->ReleaseStringUTFChars(jvm_env, o_name, c_name);
1465 } /* }}} jint cjni_api_register_match_target */
1467 static jint JNICALL cjni_api_register_match(JNIEnv *jvm_env, /* {{{ */
1468 jobject this, jobject o_name,
1470 return cjni_api_register_match_target(jvm_env, this, o_name, o_match,
1472 } /* }}} jint cjni_api_register_match */
1474 static jint JNICALL cjni_api_register_target(JNIEnv *jvm_env, /* {{{ */
1475 jobject this, jobject o_name,
1477 return cjni_api_register_match_target(jvm_env, this, o_name, o_target,
1479 } /* }}} jint cjni_api_register_target */
1481 static void JNICALL cjni_api_log(JNIEnv *jvm_env, /* {{{ */
1482 jobject this, jint severity,
1483 jobject o_message) {
1486 c_str = (*jvm_env)->GetStringUTFChars(jvm_env, o_message, 0);
1487 if (c_str == NULL) {
1488 ERROR("java plugin: cjni_api_log: GetStringUTFChars failed.");
1492 if (severity < LOG_ERR)
1494 if (severity > LOG_DEBUG)
1495 severity = LOG_DEBUG;
1497 plugin_log(severity, "%s", c_str);
1499 (*jvm_env)->ReleaseStringUTFChars(jvm_env, o_message, c_str);
1500 } /* }}} void cjni_api_log */
1502 static jstring JNICALL cjni_api_get_hostname(JNIEnv *jvm_env, jobject this) {
1503 return ctoj_output_string(jvm_env, hostname_g);
1506 /* List of ``native'' functions, i. e. C-functions that can be called from
1508 static JNINativeMethod jni_api_functions[] = /* {{{ */
1510 {"dispatchValues", "(Lorg/collectd/api/ValueList;)I",
1511 cjni_api_dispatch_values},
1513 {"dispatchNotification", "(Lorg/collectd/api/Notification;)I",
1514 cjni_api_dispatch_notification},
1516 {"getDS", "(Ljava/lang/String;)Lorg/collectd/api/DataSet;",
1520 "(Ljava/lang/String;Lorg/collectd/api/CollectdConfigInterface;)I",
1521 cjni_api_register_config},
1524 "(Ljava/lang/String;Lorg/collectd/api/CollectdInitInterface;)I",
1525 cjni_api_register_init},
1528 "(Ljava/lang/String;Lorg/collectd/api/CollectdReadInterface;)I",
1529 cjni_api_register_read},
1532 "(Ljava/lang/String;Lorg/collectd/api/CollectdWriteInterface;)I",
1533 cjni_api_register_write},
1536 "(Ljava/lang/String;Lorg/collectd/api/CollectdFlushInterface;)I",
1537 cjni_api_register_flush},
1539 {"registerShutdown",
1540 "(Ljava/lang/String;Lorg/collectd/api/CollectdShutdownInterface;)I",
1541 cjni_api_register_shutdown},
1544 "(Ljava/lang/String;Lorg/collectd/api/CollectdLogInterface;)I",
1545 cjni_api_register_log},
1547 {"registerNotification", "(Ljava/lang/String;Lorg/collectd/api/"
1548 "CollectdNotificationInterface;)I",
1549 cjni_api_register_notification},
1551 {"registerMatch", "(Ljava/lang/String;Lorg/collectd/api/"
1552 "CollectdMatchFactoryInterface;)I",
1553 cjni_api_register_match},
1555 {"registerTarget", "(Ljava/lang/String;Lorg/collectd/api/"
1556 "CollectdTargetFactoryInterface;)I",
1557 cjni_api_register_target},
1559 {"log", "(ILjava/lang/String;)V", cjni_api_log},
1561 {"getHostname", "()Ljava/lang/String;", cjni_api_get_hostname},
1564 static size_t jni_api_functions_num =
1565 sizeof(jni_api_functions) / sizeof(jni_api_functions[0]);
1571 /* Allocate a `cjni_callback_info_t' given the type and objects necessary for
1572 * all registration functions. */
1573 static cjni_callback_info_t *
1574 cjni_callback_info_create(JNIEnv *jvm_env, /* {{{ */
1575 jobject o_name, jobject o_callback, int type) {
1577 cjni_callback_info_t *cbi;
1578 const char *method_name;
1579 const char *method_signature;
1582 case CB_TYPE_CONFIG:
1583 method_name = "config";
1584 method_signature = "(Lorg/collectd/api/OConfigItem;)I";
1588 method_name = "init";
1589 method_signature = "()I";
1593 method_name = "read";
1594 method_signature = "()I";
1598 method_name = "write";
1599 method_signature = "(Lorg/collectd/api/ValueList;)I";
1603 method_name = "flush";
1604 method_signature = "(Ljava/lang/Number;Ljava/lang/String;)I";
1607 case CB_TYPE_SHUTDOWN:
1608 method_name = "shutdown";
1609 method_signature = "()I";
1613 method_name = "log";
1614 method_signature = "(ILjava/lang/String;)V";
1617 case CB_TYPE_NOTIFICATION:
1618 method_name = "notification";
1619 method_signature = "(Lorg/collectd/api/Notification;)I";
1623 method_name = "createMatch";
1624 method_signature = "(Lorg/collectd/api/OConfigItem;)"
1625 "Lorg/collectd/api/CollectdMatchInterface;";
1628 case CB_TYPE_TARGET:
1629 method_name = "createTarget";
1630 method_signature = "(Lorg/collectd/api/OConfigItem;)"
1631 "Lorg/collectd/api/CollectdTargetInterface;";
1635 ERROR("java plugin: cjni_callback_info_create: Unknown type: %#x", type);
1639 c_name = (*jvm_env)->GetStringUTFChars(jvm_env, o_name, 0);
1640 if (c_name == NULL) {
1641 ERROR("java plugin: cjni_callback_info_create: "
1642 "GetStringUTFChars failed.");
1646 cbi = calloc(1, sizeof(*cbi));
1648 ERROR("java plugin: cjni_callback_info_create: calloc failed.");
1649 (*jvm_env)->ReleaseStringUTFChars(jvm_env, o_name, c_name);
1654 cbi->name = strdup(c_name);
1655 if (cbi->name == NULL) {
1656 pthread_mutex_unlock(&java_callbacks_lock);
1657 ERROR("java plugin: cjni_callback_info_create: strdup failed.");
1658 (*jvm_env)->ReleaseStringUTFChars(jvm_env, o_name, c_name);
1663 (*jvm_env)->ReleaseStringUTFChars(jvm_env, o_name, c_name);
1665 cbi->object = (*jvm_env)->NewGlobalRef(jvm_env, o_callback);
1666 if (cbi->object == NULL) {
1667 ERROR("java plugin: cjni_callback_info_create: NewGlobalRef failed.");
1673 cbi->class = (*jvm_env)->GetObjectClass(jvm_env, cbi->object);
1674 if (cbi->class == NULL) {
1675 ERROR("java plugin: cjni_callback_info_create: GetObjectClass failed.");
1676 (*jvm_env)->DeleteGlobalRef(jvm_env, cbi->object);
1682 cbi->method = (*jvm_env)->GetMethodID(jvm_env, cbi->class, method_name,
1684 if (cbi->method == NULL) {
1685 ERROR("java plugin: cjni_callback_info_create: "
1686 "Cannot find the `%s' method with signature `%s'.",
1687 method_name, method_signature);
1688 (*jvm_env)->DeleteGlobalRef(jvm_env, cbi->object);
1695 } /* }}} cjni_callback_info_t cjni_callback_info_create */
1697 /* Allocate a `cjni_callback_info_t' via `cjni_callback_info_create' and add it
1698 * to the global `java_callbacks' variable. This is used for `config', `init',
1699 * and `shutdown' callbacks. */
1700 static int cjni_callback_register(JNIEnv *jvm_env, /* {{{ */
1701 jobject o_name, jobject o_callback,
1703 cjni_callback_info_t *cbi;
1704 cjni_callback_info_t *tmp;
1706 const char *type_str;
1709 cbi = cjni_callback_info_create(jvm_env, o_name, o_callback, type);
1715 case CB_TYPE_CONFIG:
1716 type_str = "config";
1723 case CB_TYPE_SHUTDOWN:
1724 type_str = "shutdown";
1731 case CB_TYPE_TARGET:
1732 type_str = "target";
1736 type_str = "<unknown>";
1738 DEBUG("java plugin: Registering new %s callback: %s", type_str, cbi->name);
1741 pthread_mutex_lock(&java_callbacks_lock);
1743 tmp = realloc(java_callbacks,
1744 (java_callbacks_num + 1) * sizeof(*java_callbacks));
1746 pthread_mutex_unlock(&java_callbacks_lock);
1747 ERROR("java plugin: cjni_callback_register: realloc failed.");
1749 (*jvm_env)->DeleteGlobalRef(jvm_env, cbi->object);
1754 java_callbacks = tmp;
1755 java_callbacks[java_callbacks_num] = *cbi;
1756 java_callbacks_num++;
1758 pthread_mutex_unlock(&java_callbacks_lock);
1762 } /* }}} int cjni_callback_register */
1764 /* Callback for `pthread_key_create'. It frees the data contained in
1765 * `jvm_env_key' and prints a warning if the reference counter is not zero. */
1766 static void cjni_jvm_env_destroy(void *args) /* {{{ */
1768 cjni_jvm_env_t *cjni_env;
1773 cjni_env = (cjni_jvm_env_t *)args;
1775 if (cjni_env->reference_counter > 0) {
1776 ERROR("java plugin: cjni_jvm_env_destroy: "
1777 "cjni_env->reference_counter = %i;",
1778 cjni_env->reference_counter);
1781 if (cjni_env->jvm_env != NULL) {
1782 ERROR("java plugin: cjni_jvm_env_destroy: cjni_env->jvm_env = %p;",
1783 (void *)cjni_env->jvm_env);
1786 /* The pointer is allocated in `cjni_thread_attach' */
1788 } /* }}} void cjni_jvm_env_destroy */
1790 /* Register ``native'' functions with the JVM. Native functions are C-functions
1791 * that can be called by Java code. */
1792 static int cjni_init_native(JNIEnv *jvm_env) /* {{{ */
1794 jclass api_class_ptr;
1797 api_class_ptr = (*jvm_env)->FindClass(jvm_env, "org/collectd/api/Collectd");
1798 if (api_class_ptr == NULL) {
1799 ERROR("cjni_init_native: Cannot find the API class \"org.collectd.api"
1800 ".Collectd\". Please set the correct class path "
1801 "using 'JVMArg \"-Djava.class.path=...\"'.");
1805 status = (*jvm_env)->RegisterNatives(
1806 jvm_env, api_class_ptr, jni_api_functions, (jint)jni_api_functions_num);
1808 ERROR("cjni_init_native: RegisterNatives failed with status %i.", status);
1813 } /* }}} int cjni_init_native */
1815 /* Create the JVM. This is called when the first thread tries to access the JVM
1816 * via cjni_thread_attach. */
1817 static int cjni_create_jvm(void) /* {{{ */
1820 JavaVMInitArgs vm_args = {0};
1821 JavaVMOption vm_options[jvm_argc];
1828 status = pthread_key_create(&jvm_env_key, cjni_jvm_env_destroy);
1830 ERROR("java plugin: cjni_create_jvm: pthread_key_create failed "
1838 vm_args.version = JNI_VERSION_1_2;
1839 vm_args.options = vm_options;
1840 vm_args.nOptions = (jint)jvm_argc;
1842 for (size_t i = 0; i < jvm_argc; i++) {
1843 DEBUG("java plugin: cjni_create_jvm: jvm_argv[%" PRIsz "] = %s", i,
1845 vm_args.options[i].optionString = jvm_argv[i];
1848 status = JNI_CreateJavaVM(&jvm, (void *)&jvm_env, (void *)&vm_args);
1850 ERROR("java plugin: cjni_create_jvm: "
1851 "JNI_CreateJavaVM failed with status %i.",
1855 assert(jvm != NULL);
1856 assert(jvm_env != NULL);
1858 /* Call RegisterNatives */
1859 status = cjni_init_native(jvm_env);
1861 ERROR("java plugin: cjni_create_jvm: cjni_init_native failed.");
1865 DEBUG("java plugin: The JVM has been created.");
1867 } /* }}} int cjni_create_jvm */
1869 /* Increase the reference counter to the JVM for this thread. If it was zero,
1870 * attach the JVM first. */
1871 static JNIEnv *cjni_thread_attach(void) /* {{{ */
1873 cjni_jvm_env_t *cjni_env;
1876 /* If we're the first thread to access the JVM, we'll have to create it
1881 status = cjni_create_jvm();
1883 ERROR("java plugin: cjni_thread_attach: cjni_create_jvm failed.");
1887 assert(jvm != NULL);
1889 cjni_env = pthread_getspecific(jvm_env_key);
1890 if (cjni_env == NULL) {
1891 /* This pointer is free'd in `cjni_jvm_env_destroy'. */
1892 cjni_env = calloc(1, sizeof(*cjni_env));
1893 if (cjni_env == NULL) {
1894 ERROR("java plugin: cjni_thread_attach: calloc failed.");
1897 cjni_env->reference_counter = 0;
1898 cjni_env->jvm_env = NULL;
1900 pthread_setspecific(jvm_env_key, cjni_env);
1903 if (cjni_env->reference_counter > 0) {
1904 cjni_env->reference_counter++;
1905 jvm_env = cjni_env->jvm_env;
1908 JavaVMAttachArgs args = {0};
1910 assert(cjni_env->jvm_env == NULL);
1912 args.version = JNI_VERSION_1_2;
1914 status = (*jvm)->AttachCurrentThread(jvm, (void *)&jvm_env, (void *)&args);
1916 ERROR("java plugin: cjni_thread_attach: AttachCurrentThread failed "
1922 cjni_env->reference_counter = 1;
1923 cjni_env->jvm_env = jvm_env;
1926 DEBUG("java plugin: cjni_thread_attach: cjni_env->reference_counter = %i",
1927 cjni_env->reference_counter);
1928 assert(jvm_env != NULL);
1930 } /* }}} JNIEnv *cjni_thread_attach */
1932 /* Decrease the reference counter of this thread. If it reaches zero, detach
1934 static int cjni_thread_detach(void) /* {{{ */
1936 cjni_jvm_env_t *cjni_env;
1939 cjni_env = pthread_getspecific(jvm_env_key);
1940 if (cjni_env == NULL) {
1941 ERROR("java plugin: cjni_thread_detach: pthread_getspecific failed.");
1945 assert(cjni_env->reference_counter > 0);
1946 assert(cjni_env->jvm_env != NULL);
1948 cjni_env->reference_counter--;
1949 DEBUG("java plugin: cjni_thread_detach: cjni_env->reference_counter = %i",
1950 cjni_env->reference_counter);
1952 if (cjni_env->reference_counter > 0)
1955 status = (*jvm)->DetachCurrentThread(jvm);
1957 ERROR("java plugin: cjni_thread_detach: DetachCurrentThread failed "
1962 cjni_env->reference_counter = 0;
1963 cjni_env->jvm_env = NULL;
1966 } /* }}} int cjni_thread_detach */
1968 static int cjni_config_add_jvm_arg(oconfig_item_t *ci) /* {{{ */
1972 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
1973 WARNING("java plugin: `JVMArg' needs exactly one string argument.");
1978 ERROR("java plugin: All `JVMArg' options MUST appear before all "
1979 "`LoadPlugin' options! The JVM is already started and I have to "
1980 "ignore this argument: %s",
1981 ci->values[0].value.string);
1985 tmp = realloc(jvm_argv, sizeof(char *) * (jvm_argc + 1));
1987 ERROR("java plugin: realloc failed.");
1992 jvm_argv[jvm_argc] = strdup(ci->values[0].value.string);
1993 if (jvm_argv[jvm_argc] == NULL) {
1994 ERROR("java plugin: strdup failed.");
2000 } /* }}} int cjni_config_add_jvm_arg */
2002 static int cjni_config_load_plugin(oconfig_item_t *ci) /* {{{ */
2005 java_plugin_class_t *class;
2006 jmethodID constructor_id;
2009 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
2010 WARNING("java plugin: `LoadPlugin' needs exactly one string argument.");
2014 jvm_env = cjni_thread_attach();
2015 if (jvm_env == NULL)
2018 class = realloc(java_classes_list,
2019 (java_classes_list_len + 1) * sizeof(*java_classes_list));
2020 if (class == NULL) {
2021 ERROR("java plugin: realloc failed.");
2022 cjni_thread_detach();
2025 java_classes_list = class;
2026 class = java_classes_list + java_classes_list_len;
2028 memset(class, 0, sizeof(*class));
2029 class->name = strdup(ci->values[0].value.string);
2030 if (class->name == NULL) {
2031 ERROR("java plugin: strdup failed.");
2032 cjni_thread_detach();
2035 class->class = NULL;
2036 class->object = NULL;
2038 { /* Replace all dots ('.') with slashes ('/'). Dots are usually used
2039 thorough the Java community, but (Sun's) `FindClass' and friends need
2041 for (size_t i = 0; class->name[i] != 0; i++)
2042 if (class->name[i] == '.')
2043 class->name[i] = '/';
2046 DEBUG("java plugin: Loading class %s", class->name);
2048 class->class = (*jvm_env)->FindClass(jvm_env, class->name);
2049 if (class->class == NULL) {
2050 ERROR("java plugin: cjni_config_load_plugin: FindClass (%s) failed.",
2052 cjni_thread_detach();
2058 (*jvm_env)->GetMethodID(jvm_env, class->class, "<init>", "()V");
2059 if (constructor_id == NULL) {
2060 ERROR("java plugin: cjni_config_load_plugin: "
2061 "Could not find the constructor for `%s'.",
2063 cjni_thread_detach();
2068 tmp_object = (*jvm_env)->NewObject(jvm_env, class->class, constructor_id);
2069 if (tmp_object != NULL)
2070 class->object = (*jvm_env)->NewGlobalRef(jvm_env, tmp_object);
2072 class->object = NULL;
2073 if (class->object == NULL) {
2074 ERROR("java plugin: cjni_config_load_plugin: "
2075 "Could create a new `%s' object.",
2077 cjni_thread_detach();
2082 cjni_thread_detach();
2084 java_classes_list_len++;
2087 } /* }}} int cjni_config_load_plugin */
2089 static int cjni_config_plugin_block(oconfig_item_t *ci) /* {{{ */
2092 cjni_callback_info_t *cbi;
2099 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
2100 WARNING("java plugin: `Plugin' blocks "
2101 "need exactly one string argument.");
2105 name = ci->values[0].value.string;
2108 for (size_t i = 0; i < java_callbacks_num; i++) {
2109 if (java_callbacks[i].type != CB_TYPE_CONFIG)
2112 if (strcmp(name, java_callbacks[i].name) != 0)
2115 cbi = java_callbacks + i;
2120 NOTICE("java plugin: Configuration block for `%s' found, but no such "
2121 "configuration callback has been registered. Please make sure, the "
2122 "`LoadPlugin' lines precede the `Plugin' blocks.",
2127 DEBUG("java plugin: Configuring %s", name);
2129 jvm_env = cjni_thread_attach();
2130 if (jvm_env == NULL)
2133 o_ocitem = ctoj_oconfig_item(jvm_env, ci);
2134 if (o_ocitem == NULL) {
2135 ERROR("java plugin: cjni_config_plugin_block: ctoj_oconfig_item failed.");
2136 cjni_thread_detach();
2140 class = (*jvm_env)->GetObjectClass(jvm_env, cbi->object);
2141 method = (*jvm_env)->GetMethodID(jvm_env, class, "config",
2142 "(Lorg/collectd/api/OConfigItem;)I");
2144 (*jvm_env)->CallIntMethod(jvm_env, cbi->object, method, o_ocitem);
2146 (*jvm_env)->DeleteLocalRef(jvm_env, o_ocitem);
2147 cjni_thread_detach();
2149 } /* }}} int cjni_config_plugin_block */
2151 static int cjni_config_perform(oconfig_item_t *ci) /* {{{ */
2160 for (int i = 0; i < ci->children_num; i++) {
2161 oconfig_item_t *child = ci->children + i;
2163 if (strcasecmp("JVMArg", child->key) == 0) {
2164 status = cjni_config_add_jvm_arg(child);
2169 } else if (strcasecmp("LoadPlugin", child->key) == 0) {
2170 status = cjni_config_load_plugin(child);
2175 } else if (strcasecmp("Plugin", child->key) == 0) {
2176 status = cjni_config_plugin_block(child);
2182 WARNING("java plugin: Option `%s' not allowed here.", child->key);
2187 DEBUG("java plugin: jvm_argc = %" PRIsz ";", jvm_argc);
2188 DEBUG("java plugin: java_classes_list_len = %" PRIsz ";",
2189 java_classes_list_len);
2191 if ((success == 0) && (errors > 0)) {
2192 ERROR("java plugin: All statements failed.");
2197 } /* }}} int cjni_config_perform */
2199 /* Copy the children of `ci' to the global `config_block' variable. */
2200 static int cjni_config_callback(oconfig_item_t *ci) /* {{{ */
2202 oconfig_item_t *ci_copy;
2203 oconfig_item_t *tmp;
2206 if (ci->children_num == 0)
2207 return 0; /* nothing to do */
2209 ci_copy = oconfig_clone(ci);
2210 if (ci_copy == NULL) {
2211 ERROR("java plugin: oconfig_clone failed.");
2215 if (config_block == NULL) {
2216 config_block = ci_copy;
2220 tmp = realloc(config_block->children,
2221 (config_block->children_num + ci_copy->children_num) *
2224 ERROR("java plugin: realloc failed.");
2225 oconfig_free(ci_copy);
2228 config_block->children = tmp;
2230 /* Copy the pointers */
2231 memcpy(config_block->children + config_block->children_num, ci_copy->children,
2232 ci_copy->children_num * sizeof(*ci_copy->children));
2233 config_block->children_num += ci_copy->children_num;
2235 /* Delete the pointers from the copy, so `oconfig_free' can't free them. */
2236 memset(ci_copy->children, 0,
2237 ci_copy->children_num * sizeof(*ci_copy->children));
2238 ci_copy->children_num = 0;
2240 oconfig_free(ci_copy);
2243 } /* }}} int cjni_config_callback */
2245 /* Free the data contained in the `user_data_t' pointer passed to `cjni_read'
2246 * and `cjni_write'. In particular, delete the global reference to the Java
2248 static void cjni_callback_info_destroy(void *arg) /* {{{ */
2251 cjni_callback_info_t *cbi;
2253 DEBUG("java plugin: cjni_callback_info_destroy (arg = %p);", arg);
2255 cbi = (cjni_callback_info_t *)arg;
2257 /* This condition can occur when shutting down. */
2266 jvm_env = cjni_thread_attach();
2267 if (jvm_env == NULL) {
2269 "java plugin: cjni_callback_info_destroy: cjni_thread_attach failed.");
2273 (*jvm_env)->DeleteGlobalRef(jvm_env, cbi->object);
2280 cjni_thread_detach();
2281 } /* }}} void cjni_callback_info_destroy */
2283 /* Call the CB_TYPE_READ callback pointed to by the `user_data_t' pointer. */
2284 static int cjni_read(user_data_t *ud) /* {{{ */
2287 cjni_callback_info_t *cbi;
2291 ERROR("java plugin: cjni_read: jvm == NULL");
2295 if ((ud == NULL) || (ud->data == NULL)) {
2296 ERROR("java plugin: cjni_read: Invalid user data.");
2300 jvm_env = cjni_thread_attach();
2301 if (jvm_env == NULL)
2304 cbi = (cjni_callback_info_t *)ud->data;
2306 ret_status = (*jvm_env)->CallIntMethod(jvm_env, cbi->object, cbi->method);
2308 cjni_thread_detach();
2310 } /* }}} int cjni_read */
2312 /* Call the CB_TYPE_WRITE callback pointed to by the `user_data_t' pointer. */
2313 static int cjni_write(const data_set_t *ds, const value_list_t *vl, /* {{{ */
2316 cjni_callback_info_t *cbi;
2321 ERROR("java plugin: cjni_write: jvm == NULL");
2325 if ((ud == NULL) || (ud->data == NULL)) {
2326 ERROR("java plugin: cjni_write: Invalid user data.");
2330 jvm_env = cjni_thread_attach();
2331 if (jvm_env == NULL)
2334 cbi = (cjni_callback_info_t *)ud->data;
2336 vl_java = ctoj_value_list(jvm_env, ds, vl);
2337 if (vl_java == NULL) {
2338 ERROR("java plugin: cjni_write: ctoj_value_list failed.");
2339 cjni_thread_detach();
2344 (*jvm_env)->CallIntMethod(jvm_env, cbi->object, cbi->method, vl_java);
2346 (*jvm_env)->DeleteLocalRef(jvm_env, vl_java);
2348 cjni_thread_detach();
2350 } /* }}} int cjni_write */
2352 /* Call the CB_TYPE_FLUSH callback pointed to by the `user_data_t' pointer. */
2353 static int cjni_flush(cdtime_t timeout, const char *identifier, /* {{{ */
2356 cjni_callback_info_t *cbi;
2358 jobject o_identifier;
2362 ERROR("java plugin: cjni_flush: jvm == NULL");
2366 if ((ud == NULL) || (ud->data == NULL)) {
2367 ERROR("java plugin: cjni_flush: Invalid user data.");
2371 jvm_env = cjni_thread_attach();
2372 if (jvm_env == NULL)
2375 cbi = (cjni_callback_info_t *)ud->data;
2378 ctoj_jdouble_to_number(jvm_env, (jdouble)CDTIME_T_TO_DOUBLE(timeout));
2379 if (o_timeout == NULL) {
2380 ERROR("java plugin: cjni_flush: Converting double "
2381 "to Number object failed.");
2382 cjni_thread_detach();
2386 o_identifier = NULL;
2387 if (identifier != NULL) {
2388 o_identifier = (*jvm_env)->NewStringUTF(jvm_env, identifier);
2389 if (o_identifier == NULL) {
2390 (*jvm_env)->DeleteLocalRef(jvm_env, o_timeout);
2391 ERROR("java plugin: cjni_flush: NewStringUTF failed.");
2392 cjni_thread_detach();
2397 ret_status = (*jvm_env)->CallIntMethod(jvm_env, cbi->object, cbi->method,
2398 o_timeout, o_identifier);
2400 (*jvm_env)->DeleteLocalRef(jvm_env, o_identifier);
2401 (*jvm_env)->DeleteLocalRef(jvm_env, o_timeout);
2403 cjni_thread_detach();
2405 } /* }}} int cjni_flush */
2407 /* Call the CB_TYPE_LOG callback pointed to by the `user_data_t' pointer. */
2408 static void cjni_log(int severity, const char *message, /* {{{ */
2411 cjni_callback_info_t *cbi;
2417 if ((ud == NULL) || (ud->data == NULL))
2420 jvm_env = cjni_thread_attach();
2421 if (jvm_env == NULL)
2424 cbi = (cjni_callback_info_t *)ud->data;
2426 o_message = (*jvm_env)->NewStringUTF(jvm_env, message);
2427 if (o_message == NULL) {
2428 cjni_thread_detach();
2432 (*jvm_env)->CallVoidMethod(jvm_env, cbi->object, cbi->method, (jint)severity,
2435 (*jvm_env)->DeleteLocalRef(jvm_env, o_message);
2437 cjni_thread_detach();
2438 } /* }}} void cjni_log */
2440 /* Call the CB_TYPE_NOTIFICATION callback pointed to by the `user_data_t'
2442 static int cjni_notification(const notification_t *n, /* {{{ */
2445 cjni_callback_info_t *cbi;
2446 jobject o_notification;
2450 ERROR("java plugin: cjni_read: jvm == NULL");
2454 if ((ud == NULL) || (ud->data == NULL)) {
2455 ERROR("java plugin: cjni_read: Invalid user data.");
2459 jvm_env = cjni_thread_attach();
2460 if (jvm_env == NULL)
2463 cbi = (cjni_callback_info_t *)ud->data;
2465 o_notification = ctoj_notification(jvm_env, n);
2466 if (o_notification == NULL) {
2467 ERROR("java plugin: cjni_notification: ctoj_notification failed.");
2468 cjni_thread_detach();
2472 ret_status = (*jvm_env)->CallIntMethod(jvm_env, cbi->object, cbi->method,
2475 (*jvm_env)->DeleteLocalRef(jvm_env, o_notification);
2477 cjni_thread_detach();
2479 } /* }}} int cjni_notification */
2481 /* Callbacks for matches implemented in Java */
2482 static int cjni_match_target_create(const oconfig_item_t *ci, /* {{{ */
2485 cjni_callback_info_t *cbi_ret;
2486 cjni_callback_info_t *cbi_factory;
2496 #define BAIL_OUT(status) \
2497 if (cbi_ret != NULL) { \
2498 free(cbi_ret->name); \
2499 if ((jvm_env != NULL) && (cbi_ret->object != NULL)) \
2500 (*jvm_env)->DeleteLocalRef(jvm_env, cbi_ret->object); \
2504 (*jvm_env)->DeleteLocalRef(jvm_env, o_ci); \
2505 cjni_thread_detach(); \
2509 ERROR("java plugin: cjni_read: jvm == NULL");
2513 jvm_env = cjni_thread_attach();
2514 if (jvm_env == NULL)
2517 /* Find out whether to create a match or a target. */
2518 if (strcasecmp("Match", ci->key) == 0)
2519 type = CB_TYPE_MATCH;
2520 else if (strcasecmp("Target", ci->key) == 0)
2521 type = CB_TYPE_TARGET;
2523 ERROR("java plugin: cjni_match_target_create: Can't figure out whether "
2524 "to create a match or a target.");
2528 /* This is the name of the match we should create. */
2529 name = ci->values[0].value.string;
2531 /* Lets see if we have a matching factory here.. */
2533 for (size_t i = 0; i < java_callbacks_num; i++) {
2534 if (java_callbacks[i].type != type)
2537 if (strcmp(name, java_callbacks[i].name) != 0)
2540 cbi_factory = java_callbacks + i;
2544 /* Nope, no factory for that name.. */
2545 if (cbi_factory == NULL) {
2546 ERROR("java plugin: cjni_match_target_create: "
2547 "No such match factory registered: %s",
2552 /* We convert `ci' to its Java equivalent.. */
2553 o_ci = ctoj_oconfig_item(jvm_env, ci);
2555 ERROR("java plugin: cjni_match_target_create: "
2556 "ctoj_oconfig_item failed.");
2560 /* Allocate a new callback info structure. This is going to be our user_data
2562 cbi_ret = calloc(1, sizeof(*cbi_ret));
2563 if (cbi_ret == NULL) {
2564 ERROR("java plugin: cjni_match_target_create: calloc failed.");
2568 cbi_ret->object = NULL;
2569 cbi_ret->type = type;
2571 /* Lets fill the callback info structure.. First, the name: */
2572 cbi_ret->name = strdup(name);
2573 if (cbi_ret->name == NULL) {
2574 ERROR("java plugin: cjni_match_target_create: strdup failed.");
2578 /* Then call the factory method so it creates a new object for us. */
2579 o_tmp = (*jvm_env)->CallObjectMethod(jvm_env, cbi_factory->object,
2580 cbi_factory->method, o_ci);
2581 if (o_tmp == NULL) {
2582 ERROR("java plugin: cjni_match_target_create: CallObjectMethod failed.");
2586 cbi_ret->object = (*jvm_env)->NewGlobalRef(jvm_env, o_tmp);
2587 if (o_tmp == NULL) {
2588 ERROR("java plugin: cjni_match_target_create: NewGlobalRef failed.");
2592 /* This is the class of the match. It is possibly different from the class of
2593 * the match-factory! */
2594 cbi_ret->class = (*jvm_env)->GetObjectClass(jvm_env, cbi_ret->object);
2595 if (cbi_ret->class == NULL) {
2596 ERROR("java plugin: cjni_match_target_create: GetObjectClass failed.");
2600 /* Lookup the `int match (DataSet, ValueList)' method. */
2601 cbi_ret->method = (*jvm_env)->GetMethodID(
2602 jvm_env, cbi_ret->class,
2603 /* method name = */ (type == CB_TYPE_MATCH) ? "match" : "invoke",
2604 "(Lorg/collectd/api/DataSet;Lorg/collectd/api/ValueList;)I");
2605 if (cbi_ret->method == NULL) {
2606 ERROR("java plugin: cjni_match_target_create: GetMethodID failed.");
2610 /* Return the newly created match via the user_data pointer. */
2611 *user_data = (void *)cbi_ret;
2613 cjni_thread_detach();
2615 DEBUG("java plugin: cjni_match_target_create: "
2616 "Successfully created a `%s' %s.",
2617 cbi_ret->name, (type == CB_TYPE_MATCH) ? "match" : "target");
2622 } /* }}} int cjni_match_target_create */
2624 static int cjni_match_target_destroy(void **user_data) /* {{{ */
2626 cjni_callback_info_destroy(*user_data);
2630 } /* }}} int cjni_match_target_destroy */
2632 static int cjni_match_target_invoke(const data_set_t *ds, /* {{{ */
2634 notification_meta_t **meta,
2637 cjni_callback_info_t *cbi;
2644 ERROR("java plugin: cjni_match_target_invoke: jvm == NULL");
2648 jvm_env = cjni_thread_attach();
2649 if (jvm_env == NULL)
2652 cbi = (cjni_callback_info_t *)*user_data;
2654 o_vl = ctoj_value_list(jvm_env, ds, vl);
2656 ERROR("java plugin: cjni_match_target_invoke: ctoj_value_list failed.");
2657 cjni_thread_detach();
2661 o_ds = ctoj_data_set(jvm_env, ds);
2663 ERROR("java plugin: cjni_match_target_invoke: ctoj_value_list failed.");
2664 cjni_thread_detach();
2669 (*jvm_env)->CallIntMethod(jvm_env, cbi->object, cbi->method, o_ds, o_vl);
2671 DEBUG("java plugin: cjni_match_target_invoke: Method returned %i.",
2674 /* If we're executing a target, copy the `ValueList' back to our
2675 * `value_list_t'. */
2676 if (cbi->type == CB_TYPE_TARGET) {
2677 value_list_t new_vl = {0};
2679 status = jtoc_value_list(jvm_env, &new_vl, o_vl);
2681 ERROR("java plugin: cjni_match_target_invoke: "
2682 "jtoc_value_list failed.");
2683 } else /* if (status == 0) */
2685 /* plugin_dispatch_values assures that this is dynamically allocated
2689 /* This will replace the vl->values pointer to a new, dynamically
2690 * allocated piece of memory. */
2691 memcpy(vl, &new_vl, sizeof(*vl));
2693 } /* if (cbi->type == CB_TYPE_TARGET) */
2695 cjni_thread_detach();
2697 } /* }}} int cjni_match_target_invoke */
2699 /* Iterate over `java_callbacks' and call all CB_TYPE_INIT callbacks. */
2700 static int cjni_init_plugins(JNIEnv *jvm_env) /* {{{ */
2704 for (size_t i = 0; i < java_callbacks_num; i++) {
2705 if (java_callbacks[i].type != CB_TYPE_INIT)
2708 DEBUG("java plugin: Initializing %s", java_callbacks[i].name);
2710 status = (*jvm_env)->CallIntMethod(jvm_env, java_callbacks[i].object,
2711 java_callbacks[i].method);
2713 ERROR("java plugin: Initializing `%s' failed with status %i. "
2714 "Removing read function.",
2715 java_callbacks[i].name, status);
2716 plugin_unregister_read(java_callbacks[i].name);
2721 } /* }}} int cjni_init_plugins */
2723 /* Iterate over `java_callbacks' and call all CB_TYPE_SHUTDOWN callbacks. */
2724 static int cjni_shutdown_plugins(JNIEnv *jvm_env) /* {{{ */
2728 for (size_t i = 0; i < java_callbacks_num; i++) {
2729 if (java_callbacks[i].type != CB_TYPE_SHUTDOWN)
2732 DEBUG("java plugin: Shutting down %s", java_callbacks[i].name);
2734 status = (*jvm_env)->CallIntMethod(jvm_env, java_callbacks[i].object,
2735 java_callbacks[i].method);
2737 ERROR("java plugin: Shutting down `%s' failed with status %i. ",
2738 java_callbacks[i].name, status);
2743 } /* }}} int cjni_shutdown_plugins */
2745 static int cjni_shutdown(void) /* {{{ */
2748 JavaVMAttachArgs args = {0};
2755 args.version = JNI_VERSION_1_2;
2757 status = (*jvm)->AttachCurrentThread(jvm, (void *)&jvm_env, &args);
2759 ERROR("java plugin: cjni_shutdown: AttachCurrentThread failed with status "
2765 /* Execute all the shutdown functions registered by plugins. */
2766 cjni_shutdown_plugins(jvm_env);
2768 /* Release all the global references to callback functions */
2769 for (size_t i = 0; i < java_callbacks_num; i++) {
2770 if (java_callbacks[i].object != NULL) {
2771 (*jvm_env)->DeleteGlobalRef(jvm_env, java_callbacks[i].object);
2772 java_callbacks[i].object = NULL;
2774 sfree(java_callbacks[i].name);
2776 java_callbacks_num = 0;
2777 sfree(java_callbacks);
2779 /* Release all the global references to directly loaded classes. */
2780 for (size_t i = 0; i < java_classes_list_len; i++) {
2781 if (java_classes_list[i].object != NULL) {
2782 (*jvm_env)->DeleteGlobalRef(jvm_env, java_classes_list[i].object);
2783 java_classes_list[i].object = NULL;
2785 sfree(java_classes_list[i].name);
2787 java_classes_list_len = 0;
2788 sfree(java_classes_list);
2790 /* Destroy the JVM */
2791 DEBUG("java plugin: Destroying the JVM.");
2792 (*jvm)->DestroyJavaVM(jvm);
2796 pthread_key_delete(jvm_env_key);
2798 /* Free the JVM argument list */
2799 for (size_t i = 0; i < jvm_argc; i++)
2805 } /* }}} int cjni_shutdown */
2807 /* Initialization: Create a JVM, load all configured classes and call their
2808 * `config' and `init' callback methods. */
2809 static int cjni_init(void) /* {{{ */
2813 if ((config_block == NULL) && (jvm == NULL)) {
2814 ERROR("java plugin: cjni_init: No configuration block for "
2815 "the java plugin was found.");
2819 if (config_block != NULL) {
2820 cjni_config_perform(config_block);
2821 oconfig_free(config_block);
2825 ERROR("java plugin: cjni_init: jvm == NULL");
2829 jvm_env = cjni_thread_attach();
2830 if (jvm_env == NULL)
2833 cjni_init_plugins(jvm_env);
2835 cjni_thread_detach();
2837 } /* }}} int cjni_init */
2839 void module_register(void) {
2840 plugin_register_complex_config("java", cjni_config_callback);
2841 plugin_register_init("java", cjni_init);
2842 plugin_register_shutdown("java", cjni_shutdown);
2843 } /* void module_register (void) */