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 verplant.org>
21 * Justo Alonso Achaques <justo.alonso at gmail.com>
31 #if !defined(JNI_VERSION_1_2)
32 # error "Need JNI 1.2 compatible interface!"
38 struct java_plugin_s /* {{{ */
46 #define CJNI_FLAG_ENABLED 0x0001
55 typedef struct java_plugin_s java_plugin_t;
58 struct cjni_jvm_env_s /* {{{ */
61 int reference_counter;
63 typedef struct cjni_jvm_env_s cjni_jvm_env_t;
69 static JavaVM *jvm = NULL;
70 static pthread_key_t jvm_env_key;
72 static char **jvm_argv = NULL;
73 static size_t jvm_argc = 0;
75 static java_plugin_t *java_plugins = NULL;
76 static size_t java_plugins_num = 0;
79 * C to Java conversion functions
81 static int ctoj_string (JNIEnv *jvm_env, /* {{{ */
83 jclass class_ptr, jobject object_ptr, const char *method_name)
88 /* Create a java.lang.String */
89 o_string = (*jvm_env)->NewStringUTF (jvm_env,
90 (string != NULL) ? string : "");
93 ERROR ("java plugin: ctoj_string: NewStringUTF failed.");
97 /* Search for the `void setFoo (String s)' method. */
98 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
99 method_name, "(Ljava/lang/String;)V");
102 ERROR ("java plugin: ctoj_string: Cannot find method `void %s (String)'.",
104 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
108 /* Call the method. */
109 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, o_string);
111 /* Decrease reference counter on the java.lang.String object. */
112 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
115 } /* }}} int ctoj_string */
117 static int ctoj_int (JNIEnv *jvm_env, /* {{{ */
119 jclass class_ptr, jobject object_ptr, const char *method_name)
123 /* Search for the `void setFoo (int i)' method. */
124 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
125 method_name, "(I)V");
128 ERROR ("java plugin: ctoj_int: Cannot find method `void %s (int)'.",
133 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
136 } /* }}} int ctoj_int */
138 static int ctoj_long (JNIEnv *jvm_env, /* {{{ */
140 jclass class_ptr, jobject object_ptr, const char *method_name)
144 /* Search for the `void setFoo (long l)' method. */
145 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
146 method_name, "(J)V");
149 ERROR ("java plugin: ctoj_long: Cannot find method `void %s (long)'.",
154 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
157 } /* }}} int ctoj_long */
159 static int ctoj_double (JNIEnv *jvm_env, /* {{{ */
161 jclass class_ptr, jobject object_ptr, const char *method_name)
165 /* Search for the `void setFoo (double d)' method. */
166 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
167 method_name, "(D)V");
170 ERROR ("java plugin: ctoj_double: Cannot find method `void %s (double)'.",
175 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
178 } /* }}} int ctoj_double */
180 /* Convert a jlong to a java.lang.Number */
181 static jobject ctoj_jlong_to_number (JNIEnv *jvm_env, jlong value) /* {{{ */
184 jmethodID m_long_constructor;
186 /* Look up the java.lang.Long class */
187 c_long = (*jvm_env)->FindClass (jvm_env, "java.lang.Long");
190 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
191 "java.lang.Long class failed.");
195 m_long_constructor = (*jvm_env)->GetMethodID (jvm_env,
196 c_long, "<init>", "(J)V");
197 if (m_long_constructor == NULL)
199 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
200 "`Long (long)' constructor failed.");
204 return ((*jvm_env)->NewObject (jvm_env,
205 c_long, m_long_constructor, value));
206 } /* }}} jobject ctoj_jlong_to_number */
208 /* Convert a jdouble to a java.lang.Number */
209 static jobject ctoj_jdouble_to_number (JNIEnv *jvm_env, jdouble value) /* {{{ */
212 jmethodID m_double_constructor;
214 /* Look up the java.lang.Long class */
215 c_double = (*jvm_env)->FindClass (jvm_env, "java.lang.Double");
216 if (c_double == NULL)
218 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
219 "java.lang.Double class failed.");
223 m_double_constructor = (*jvm_env)->GetMethodID (jvm_env,
224 c_double, "<init>", "(D)V");
225 if (m_double_constructor == NULL)
227 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
228 "`Double (double)' constructor failed.");
232 return ((*jvm_env)->NewObject (jvm_env,
233 c_double, m_double_constructor, value));
234 } /* }}} jobject ctoj_jdouble_to_number */
236 /* Convert a value_t to a java.lang.Number */
237 static jobject ctoj_value_to_number (JNIEnv *jvm_env, /* {{{ */
238 value_t value, int ds_type)
240 if (ds_type == DS_TYPE_COUNTER)
241 return (ctoj_jlong_to_number (jvm_env, (jlong) value.counter));
242 else if (ds_type == DS_TYPE_GAUGE)
243 return (ctoj_jdouble_to_number (jvm_env, (jdouble) value.gauge));
246 } /* }}} jobject ctoj_value_to_number */
248 /* Convert a data_source_t to a org.collectd.api.DataSource */
249 static jobject ctoj_data_source (JNIEnv *jvm_env, /* {{{ */
250 const data_source_t *dsrc)
253 jmethodID m_datasource_constructor;
254 jobject o_datasource;
257 /* Look up the DataSource class */
258 c_datasource = (*jvm_env)->FindClass (jvm_env,
259 "org.collectd.api.DataSource");
260 if (c_datasource == NULL)
262 ERROR ("java plugin: ctoj_data_source: "
263 "FindClass (org.collectd.api.DataSource) failed.");
267 /* Lookup the `ValueList ()' constructor. */
268 m_datasource_constructor = (*jvm_env)->GetMethodID (jvm_env, c_datasource,
270 if (m_datasource_constructor == NULL)
272 ERROR ("java plugin: ctoj_data_source: Cannot find the "
273 "`DataSource ()' constructor.");
277 /* Create a new instance. */
278 o_datasource = (*jvm_env)->NewObject (jvm_env, c_datasource,
279 m_datasource_constructor);
280 if (o_datasource == NULL)
282 ERROR ("java plugin: ctoj_data_source: "
283 "Creating a new DataSource instance failed.");
287 /* Set name via `void setName (String name)' */
288 status = ctoj_string (jvm_env, dsrc->name,
289 c_datasource, o_datasource, "setName");
292 ERROR ("java plugin: ctoj_data_source: "
293 "ctoj_string (setName) failed.");
294 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
298 /* Set type via `void setType (int type)' */
299 status = ctoj_int (jvm_env, dsrc->type,
300 c_datasource, o_datasource, "setType");
303 ERROR ("java plugin: ctoj_data_source: "
304 "ctoj_int (setType) failed.");
305 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
309 /* Set min via `void setMin (double min)' */
310 status = ctoj_double (jvm_env, dsrc->min,
311 c_datasource, o_datasource, "setMin");
314 ERROR ("java plugin: ctoj_data_source: "
315 "ctoj_double (setMin) failed.");
316 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
320 /* Set max via `void setMax (double max)' */
321 status = ctoj_double (jvm_env, dsrc->max,
322 c_datasource, o_datasource, "setMax");
325 ERROR ("java plugin: ctoj_data_source: "
326 "ctoj_double (setMax) failed.");
327 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
331 return (o_datasource);
332 } /* }}} jobject ctoj_data_source */
334 /* Convert a oconfig_value_t to a org.collectd.api.OConfigValue */
335 static jobject ctoj_oconfig_value (JNIEnv *jvm_env, /* {{{ */
336 oconfig_value_t ocvalue)
339 jmethodID m_ocvalue_constructor;
343 m_ocvalue_constructor = NULL;
346 c_ocvalue = (*jvm_env)->FindClass (jvm_env,
347 "org.collectd.api.OConfigValue");
348 if (c_ocvalue == NULL)
350 ERROR ("java plugin: ctoj_oconfig_value: "
351 "FindClass (org.collectd.api.OConfigValue) failed.");
355 if (ocvalue.type == OCONFIG_TYPE_BOOLEAN)
357 jboolean tmp_boolean;
359 tmp_boolean = (ocvalue.value.boolean == 0) ? JNI_FALSE : JNI_TRUE;
361 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
363 if (m_ocvalue_constructor == NULL)
365 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
366 "`OConfigValue (boolean)' constructor.");
370 return ((*jvm_env)->NewObject (jvm_env,
371 c_ocvalue, m_ocvalue_constructor, tmp_boolean));
372 } /* if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) */
373 else if (ocvalue.type == OCONFIG_TYPE_STRING)
375 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
376 "<init>", "(Ljava/lang/String;)V");
377 if (m_ocvalue_constructor == NULL)
379 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
380 "`OConfigValue (String)' constructor.");
384 o_argument = (*jvm_env)->NewStringUTF (jvm_env, ocvalue.value.string);
385 if (o_argument == NULL)
387 ERROR ("java plugin: ctoj_oconfig_value: "
388 "Creating a String object failed.");
392 else if (ocvalue.type == OCONFIG_TYPE_NUMBER)
394 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
395 "<init>", "(Ljava/lang/Number;)V");
396 if (m_ocvalue_constructor == NULL)
398 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
399 "`OConfigValue (Number)' constructor.");
403 o_argument = ctoj_jdouble_to_number (jvm_env,
404 (jdouble) ocvalue.value.number);
405 if (o_argument == NULL)
407 ERROR ("java plugin: ctoj_oconfig_value: "
408 "Creating a Number object failed.");
417 assert (m_ocvalue_constructor != NULL);
418 assert (o_argument != NULL);
420 o_ocvalue = (*jvm_env)->NewObject (jvm_env,
421 c_ocvalue, m_ocvalue_constructor, o_argument);
422 if (o_ocvalue == NULL)
424 ERROR ("java plugin: ctoj_oconfig_value: "
425 "Creating an OConfigValue object failed.");
426 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
430 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
432 } /* }}} jobject ctoj_oconfig_value */
434 /* Convert a oconfig_item_t to a org.collectd.api.OConfigItem */
435 static jobject ctoj_oconfig_item (JNIEnv *jvm_env, /* {{{ */
436 const oconfig_item_t *ci)
439 jmethodID m_ocitem_constructor;
440 jmethodID m_addvalue;
441 jmethodID m_addchild;
446 c_ocitem = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.OConfigItem");
447 if (c_ocitem == NULL)
449 ERROR ("java plugin: ctoj_oconfig_item: "
450 "FindClass (org.collectd.api.OConfigItem) failed.");
454 /* Get the required methods: m_ocitem_constructor, m_addvalue, and m_addchild
456 m_ocitem_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
457 "<init>", "(Ljava/lang/String;)V");
458 if (m_ocitem_constructor == NULL)
460 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
461 "`OConfigItem (String)' constructor.");
465 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
466 "addValue", "(Lorg/collectd/api/OConfigValue;)V");
467 if (m_addvalue == NULL)
469 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
470 "`addValue (OConfigValue)' method.");
474 m_addchild = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
475 "addChild", "(Lorg/collectd/api/OConfigItem;)V");
476 if (m_addchild == NULL)
478 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
479 "`addChild (OConfigItem)' method.");
484 /* Create a String object with the key.
485 * Needed for calling the constructor. */
486 o_key = (*jvm_env)->NewStringUTF (jvm_env, ci->key);
489 ERROR ("java plugin: ctoj_oconfig_item: "
490 "Creating String object failed.");
494 /* Create an OConfigItem object */
495 o_ocitem = (*jvm_env)->NewObject (jvm_env,
496 c_ocitem, m_ocitem_constructor, o_key);
497 if (o_ocitem == NULL)
499 ERROR ("java plugin: ctoj_oconfig_item: "
500 "Creating an OConfigItem object failed.");
501 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
505 /* We don't need the String object any longer.. */
506 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
508 /* Call OConfigItem.addValue for each value */
509 for (i = 0; i < ci->values_num; i++) /* {{{ */
513 o_value = ctoj_oconfig_value (jvm_env, ci->values[i]);
516 ERROR ("java plugin: ctoj_oconfig_item: "
517 "Creating an OConfigValue object failed.");
518 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
522 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_value);
523 (*jvm_env)->DeleteLocalRef (jvm_env, o_value);
524 } /* }}} for (i = 0; i < ci->values_num; i++) */
526 /* Call OConfigItem.addChild for each child */
527 for (i = 0; i < ci->children_num; i++) /* {{{ */
531 o_child = ctoj_oconfig_item (jvm_env, ci->children + i);
534 ERROR ("java plugin: ctoj_oconfig_item: "
535 "Creating an OConfigItem object failed.");
536 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
540 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_child);
541 (*jvm_env)->DeleteLocalRef (jvm_env, o_child);
542 } /* }}} for (i = 0; i < ci->children_num; i++) */
545 } /* }}} jobject ctoj_oconfig_item */
547 /* Convert a data_set_t to a org.collectd.api.DataSet */
548 static jobject ctoj_data_set (JNIEnv *jvm_env, const data_set_t *ds) /* {{{ */
551 jmethodID m_constructor;
557 /* Look up the org.collectd.api.DataSet class */
558 c_dataset = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.DataSet");
559 if (c_dataset == NULL)
561 ERROR ("java plugin: ctoj_data_set: Looking up the "
562 "org.collectd.api.DataSet class failed.");
566 /* Search for the `DataSet (String type)' constructor. */
567 m_constructor = (*jvm_env)->GetMethodID (jvm_env,
568 c_dataset, "<init>", "(Ljava.lang.String;)V");
569 if (m_constructor == NULL)
571 ERROR ("java plugin: ctoj_data_set: Looking up the "
572 "`DataSet (String)' constructor failed.");
576 /* Search for the `void addDataSource (DataSource)' method. */
577 m_add = (*jvm_env)->GetMethodID (jvm_env,
578 c_dataset, "addDataSource", "(Lorg.collectd.api.DataSource;)V");
581 ERROR ("java plugin: ctoj_data_set: Looking up the "
582 "`addDataSource (DataSource)' method failed.");
586 o_type = (*jvm_env)->NewStringUTF (jvm_env, ds->type);
589 ERROR ("java plugin: ctoj_data_set: Creating a String object failed.");
593 o_dataset = (*jvm_env)->NewObject (jvm_env,
594 c_dataset, m_constructor, o_type);
595 if (o_dataset == NULL)
597 ERROR ("java plugin: ctoj_data_set: Creating a DataSet object failed.");
598 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
602 /* Decrease reference counter on the java.lang.String object. */
603 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
605 for (i = 0; i < ds->ds_num; i++)
607 jobject o_datasource;
609 o_datasource = ctoj_data_source (jvm_env, ds->ds + i);
610 if (o_datasource == NULL)
612 ERROR ("java plugin: ctoj_data_set: ctoj_data_source (%s.%s) failed",
613 ds->type, ds->ds[i].name);
614 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
618 (*jvm_env)->CallVoidMethod (jvm_env, o_dataset, m_add, o_datasource);
620 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
621 } /* for (i = 0; i < ds->ds_num; i++) */
624 } /* }}} jobject ctoj_data_set */
626 static int ctoj_value_list_add_value (JNIEnv *jvm_env, /* {{{ */
627 value_t value, int ds_type,
628 jclass class_ptr, jobject object_ptr)
630 jmethodID m_addvalue;
633 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
634 "addValue", "(Ljava/lang/Number;)V");
635 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)
645 ERROR ("java plugin: ctoj_value_list_add_value: "
646 "ctoj_value_to_number failed.");
650 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_addvalue, o_number);
652 (*jvm_env)->DeleteLocalRef (jvm_env, o_number);
655 } /* }}} int ctoj_value_list_add_value */
657 static int ctoj_value_list_add_data_set (JNIEnv *jvm_env, /* {{{ */
658 jclass c_valuelist, jobject o_valuelist, const data_set_t *ds)
660 jmethodID m_setdataset;
663 /* Look for the `void setDataSource (List<DataSource> ds)' method. */
664 m_setdataset = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
665 "setDataSet", "(Lorg.collectd.api.DataSet;)V");
666 if (m_setdataset == NULL)
668 ERROR ("java plugin: ctoj_value_list_add_data_set: "
669 "Cannot find the `void setDataSet (DataSet)' method.");
673 /* Create a DataSet object. */
674 o_dataset = ctoj_data_set (jvm_env, ds);
675 if (o_dataset == NULL)
677 ERROR ("java plugin: ctoj_value_list_add_data_set: "
678 "ctoj_data_set (%s) failed.", ds->type);
682 /* Actually call the method. */
683 (*jvm_env)->CallVoidMethod (jvm_env,
684 o_valuelist, m_setdataset, o_dataset);
686 /* Decrease reference counter on the List<DataSource> object. */
687 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
690 } /* }}} int ctoj_value_list_add_data_set */
692 static jobject ctoj_value_list (JNIEnv *jvm_env, /* {{{ */
693 const data_set_t *ds, const value_list_t *vl)
696 jmethodID m_valuelist_constructor;
701 /* First, create a new ValueList instance..
702 * Look up the class.. */
703 c_valuelist = (*jvm_env)->FindClass (jvm_env,
704 "org.collectd.api.ValueList");
705 if (c_valuelist == NULL)
707 ERROR ("java plugin: ctoj_value_list: "
708 "FindClass (org.collectd.api.ValueList) failed.");
712 /* Lookup the `ValueList ()' constructor. */
713 m_valuelist_constructor = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
715 if (m_valuelist_constructor == NULL)
717 ERROR ("java plugin: ctoj_value_list: Cannot find the "
718 "`ValueList ()' constructor.");
722 /* Create a new instance. */
723 o_valuelist = (*jvm_env)->NewObject (jvm_env, c_valuelist,
724 m_valuelist_constructor);
725 if (o_valuelist == NULL)
727 ERROR ("java plugin: ctoj_value_list: Creating a new ValueList instance "
732 status = ctoj_value_list_add_data_set (jvm_env,
733 c_valuelist, o_valuelist, ds);
736 ERROR ("java plugin: ctoj_value_list: "
737 "ctoj_value_list_add_data_set failed.");
738 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
742 /* Set the strings.. */
743 #define SET_STRING(str,method_name) do { \
744 status = ctoj_string (jvm_env, str, \
745 c_valuelist, o_valuelist, method_name); \
747 ERROR ("java plugin: ctoj_value_list: jtoc_string (%s) failed.", \
749 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist); \
753 SET_STRING (vl->host, "setHost");
754 SET_STRING (vl->plugin, "setPlugin");
755 SET_STRING (vl->plugin_instance, "setPluginInstance");
756 SET_STRING (vl->type, "setType");
757 SET_STRING (vl->type_instance, "setTypeInstance");
761 /* Set the `time' member. Java stores time in milliseconds. */
762 status = ctoj_long (jvm_env, ((jlong) vl->time) * ((jlong) 1000),
763 c_valuelist, o_valuelist, "setTime");
766 ERROR ("java plugin: ctoj_value_list: ctoj_long (setTime) failed.");
767 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
771 /* Set the `interval' member.. */
772 status = ctoj_long (jvm_env, (jlong) vl->interval,
773 c_valuelist, o_valuelist, "setInterval");
776 ERROR ("java plugin: ctoj_value_list: ctoj_long (setInterval) failed.");
777 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
781 for (i = 0; i < vl->values_len; i++)
783 status = ctoj_value_list_add_value (jvm_env, vl->values[i], ds->ds[i].type,
784 c_valuelist, o_valuelist);
787 ERROR ("java plugin: ctoj_value_list: "
788 "ctoj_value_list_add_value failed.");
789 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
794 return (o_valuelist);
795 } /* }}} int ctoj_value_list */
798 * Java to C conversion functions
800 static int jtoc_string (JNIEnv *jvm_env, /* {{{ */
801 char *buffer, size_t buffer_size,
802 jclass class_ptr, jobject object_ptr, const char *method_name)
808 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
809 method_name, "()Ljava/lang/String;");
810 if (method_id == NULL)
812 ERROR ("java plugin: jtoc_string: Cannot find method `String %s ()'.",
817 string_obj = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, method_id);
818 if (string_obj == NULL)
820 ERROR ("java plugin: jtoc_string: CallObjectMethod (%s) failed.",
825 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, string_obj, 0);
828 ERROR ("java plugin: jtoc_string: GetStringUTFChars failed.");
829 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
833 sstrncpy (buffer, c_str, buffer_size);
835 (*jvm_env)->ReleaseStringUTFChars (jvm_env, string_obj, c_str);
836 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
839 } /* }}} int jtoc_string */
841 static int jtoc_long (JNIEnv *jvm_env, /* {{{ */
843 jclass class_ptr, jobject object_ptr, const char *method_name)
847 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
849 if (method_id == NULL)
851 ERROR ("java plugin: jtoc_long: Cannot find method `long %s ()'.",
856 *ret_value = (*jvm_env)->CallLongMethod (jvm_env, object_ptr, method_id);
859 } /* }}} int jtoc_long */
861 static int jtoc_double (JNIEnv *jvm_env, /* {{{ */
863 jclass class_ptr, jobject object_ptr, const char *method_name)
867 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
869 if (method_id == NULL)
871 ERROR ("java plugin: jtoc_string: Cannot find method `double %s ()'.",
876 *ret_value = (*jvm_env)->CallDoubleMethod (jvm_env, object_ptr, method_id);
879 } /* }}} int jtoc_double */
881 static int jtoc_value (JNIEnv *jvm_env, /* {{{ */
882 value_t *ret_value, int ds_type, jobject object_ptr)
887 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
889 if (ds_type == DS_TYPE_COUNTER)
893 status = jtoc_long (jvm_env, &tmp_long,
894 class_ptr, object_ptr, "longValue");
897 ERROR ("java plugin: jtoc_value: "
898 "jtoc_long failed.");
901 (*ret_value).counter = (counter_t) tmp_long;
907 status = jtoc_double (jvm_env, &tmp_double,
908 class_ptr, object_ptr, "doubleValue");
911 ERROR ("java plugin: jtoc_value: "
912 "jtoc_double failed.");
915 (*ret_value).gauge = (gauge_t) tmp_double;
919 } /* }}} int jtoc_value */
921 static int jtoc_values_array (JNIEnv *jvm_env, /* {{{ */
922 const data_set_t *ds, value_list_t *vl,
923 jclass class_ptr, jobject object_ptr)
925 jmethodID m_getvalues;
928 jobjectArray o_number_array;
934 values_num = ds->ds_num;
937 o_number_array = NULL;
940 #define BAIL_OUT(status) \
942 if (o_number_array != NULL) \
943 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array); \
944 if (o_list != NULL) \
945 (*jvm_env)->DeleteLocalRef (jvm_env, o_list); \
948 /* Call: List<Number> ValueList.getValues () */
949 m_getvalues = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
950 "getValues", "()Ljava/util/List;");
951 if (m_getvalues == NULL)
953 ERROR ("java plugin: jtoc_values_array: "
954 "Cannot find method `List getValues ()'.");
958 o_list = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, m_getvalues);
961 ERROR ("java plugin: jtoc_values_array: "
962 "CallObjectMethod (getValues) failed.");
966 /* Call: Number[] List.toArray () */
967 m_toarray = (*jvm_env)->GetMethodID (jvm_env,
968 (*jvm_env)->GetObjectClass (jvm_env, o_list),
969 "toArray", "()[Ljava/lang/Object;");
970 if (m_toarray == NULL)
972 ERROR ("java plugin: jtoc_values_array: "
973 "Cannot find method `Object[] toArray ()'.");
977 o_number_array = (*jvm_env)->CallObjectMethod (jvm_env, o_list, m_toarray);
978 if (o_number_array == NULL)
980 ERROR ("java plugin: jtoc_values_array: "
981 "CallObjectMethod (toArray) failed.");
985 values = calloc (values_num, sizeof (value_t));
988 ERROR ("java plugin: jtoc_values_array: calloc failed.");
992 for (i = 0; i < values_num; i++)
997 o_number = (*jvm_env)->GetObjectArrayElement (jvm_env,
998 o_number_array, (jsize) i);
999 if (o_number == NULL)
1001 ERROR ("java plugin: jtoc_values_array: "
1002 "GetObjectArrayElement (%i) failed.", i);
1006 status = jtoc_value (jvm_env, values + i, ds->ds[i].type, o_number);
1009 ERROR ("java plugin: jtoc_values_array: "
1010 "jtoc_value (%i) failed.", i);
1013 } /* for (i = 0; i < values_num; i++) */
1015 vl->values = values;
1016 vl->values_len = values_num;
1019 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array);
1020 (*jvm_env)->DeleteLocalRef (jvm_env, o_list);
1022 } /* }}} int jtoc_values_array */
1024 /* Convert a org.collectd.api.ValueList to a value_list_t. */
1025 static int jtoc_value_list (JNIEnv *jvm_env, value_list_t *vl, /* {{{ */
1031 const data_set_t *ds;
1033 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1034 if (class_ptr == NULL)
1036 ERROR ("java plugin: jtoc_value_list: GetObjectClass failed.");
1040 #define SET_STRING(buffer,method) do { \
1041 status = jtoc_string (jvm_env, buffer, sizeof (buffer), \
1042 class_ptr, object_ptr, method); \
1043 if (status != 0) { \
1044 ERROR ("java plugin: jtoc_value_list: jtoc_string (%s) failed.", \
1049 SET_STRING(vl->type, "getType");
1051 ds = plugin_get_ds (vl->type);
1054 ERROR ("java plugin: jtoc_value_list: Data-set `%s' is not defined. "
1055 "Please consult the types.db(5) manpage for mor information.",
1060 SET_STRING(vl->host, "getHost");
1061 SET_STRING(vl->plugin, "getPlugin");
1062 SET_STRING(vl->plugin_instance, "getPluginInstance");
1063 SET_STRING(vl->type_instance, "getTypeInstance");
1067 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1070 ERROR ("java plugin: jtoc_value_list: jtoc_long (getTime) failed.");
1073 /* Java measures time in milliseconds. */
1074 vl->time = (time_t) (tmp_long / ((jlong) 1000));
1076 status = jtoc_long (jvm_env, &tmp_long,
1077 class_ptr, object_ptr, "getInterval");
1080 ERROR ("java plugin: jtoc_value_list: jtoc_long (getInterval) failed.");
1083 vl->interval = (int) tmp_long;
1085 status = jtoc_values_array (jvm_env, ds, vl, class_ptr, object_ptr);
1088 ERROR ("java plugin: jtoc_value_list: jtoc_values_array failed.");
1093 } /* }}} int jtoc_value_list */
1096 * Functions accessible from Java
1098 static jint JNICALL cjni_api_dispatch_values (JNIEnv *jvm_env, /* {{{ */
1099 jobject this, jobject java_vl)
1101 value_list_t vl = VALUE_LIST_INIT;
1104 DEBUG ("cjni_api_dispatch_values: java_vl = %p;", (void *) java_vl);
1106 status = jtoc_value_list (jvm_env, &vl, java_vl);
1109 ERROR ("java plugin: cjni_api_dispatch_values: jtoc_value_list failed.");
1113 status = plugin_dispatch_values (&vl);
1118 } /* }}} jint cjni_api_dispatch_values */
1120 static jobject JNICALL cjni_api_get_ds (JNIEnv *jvm_env, /* {{{ */
1121 jobject this, jobject o_string_type)
1123 const char *ds_name;
1124 const data_set_t *ds;
1127 ds_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_string_type, 0);
1128 if (ds_name == NULL)
1130 ERROR ("java plugin: cjni_api_get_ds: GetStringUTFChars failed.");
1134 ds = plugin_get_ds (ds_name);
1135 DEBUG ("java plugin: cjni_api_get_ds: "
1136 "plugin_get_ds (%s) = %p;", ds_name, (void *) ds);
1138 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_string_type, ds_name);
1143 o_dataset = ctoj_data_set (jvm_env, ds);
1145 } /* }}} jint cjni_api_get_ds */
1147 static JNINativeMethod jni_api_functions[] =
1149 { "DispatchValues", "(Lorg/collectd/api/ValueList;)I", cjni_api_dispatch_values },
1150 { "GetDS", "(Ljava/lang/String;)Lorg/collectd/api/DataSet;", cjni_api_get_ds }
1152 static size_t jni_api_functions_num = sizeof (jni_api_functions)
1153 / sizeof (jni_api_functions[0]);
1158 static JNIEnv *cjni_thread_attach (void) /* {{{ */
1160 cjni_jvm_env_t *cjni_env;
1163 cjni_env = pthread_getspecific (jvm_env_key);
1164 if (cjni_env == NULL)
1166 /* This pointer is free'd in `cjni_jvm_env_destroy'. */
1167 cjni_env = (cjni_jvm_env_t *) malloc (sizeof (*cjni_env));
1168 if (cjni_env == NULL)
1170 ERROR ("java plugin: cjni_thread_attach: malloc failed.");
1173 memset (cjni_env, 0, sizeof (*cjni_env));
1174 cjni_env->reference_counter = 0;
1175 cjni_env->jvm_env = NULL;
1177 pthread_setspecific (jvm_env_key, cjni_env);
1180 if (cjni_env->reference_counter > 0)
1182 cjni_env->reference_counter++;
1183 jvm_env = cjni_env->jvm_env;
1188 JavaVMAttachArgs args;
1190 assert (cjni_env->jvm_env == NULL);
1192 memset (&args, 0, sizeof (args));
1193 args.version = JNI_VERSION_1_2;
1195 status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, (void *) &args);
1198 ERROR ("java plugin: cjni_thread_attach: AttachCurrentThread failed "
1199 "with status %i.", status);
1203 cjni_env->reference_counter = 1;
1204 cjni_env->jvm_env = jvm_env;
1207 DEBUG ("java plugin: cjni_thread_attach: cjni_env->reference_counter = %i",
1208 cjni_env->reference_counter);
1209 assert (jvm_env != NULL);
1211 } /* }}} JNIEnv *cjni_thread_attach */
1213 static int cjni_thread_detach (void) /* {{{ */
1215 cjni_jvm_env_t *cjni_env;
1218 cjni_env = pthread_getspecific (jvm_env_key);
1219 if (cjni_env == NULL)
1221 ERROR ("java plugin: cjni_thread_detach: pthread_getspecific failed.");
1225 assert (cjni_env->reference_counter > 0);
1226 assert (cjni_env->jvm_env != NULL);
1228 cjni_env->reference_counter--;
1229 DEBUG ("java plugin: cjni_thread_detach: cjni_env->reference_counter = %i",
1230 cjni_env->reference_counter);
1232 if (cjni_env->reference_counter > 0)
1235 status = (*jvm)->DetachCurrentThread (jvm);
1238 ERROR ("java plugin: cjni_thread_detach: DetachCurrentThread failed "
1239 "with status %i.", status);
1242 cjni_env->reference_counter = 0;
1243 cjni_env->jvm_env = NULL;
1246 } /* }}} JNIEnv *cjni_thread_attach */
1248 static void cjni_jvm_env_destroy (void *args) /* {{{ */
1250 cjni_jvm_env_t *cjni_env;
1255 cjni_env = (cjni_jvm_env_t *) args;
1257 if (cjni_env->reference_counter > 0)
1259 ERROR ("java plugin: cjni_jvm_env_destroy: "
1260 "cjni_env->reference_counter = %i;", cjni_env->reference_counter);
1263 if (cjni_env->jvm_env != NULL)
1265 ERROR ("java plugin: cjni_jvm_env_destroy: cjni_env->jvm_env = %p;",
1266 (void *) cjni_env->jvm_env);
1269 /* The pointer is allocated in `cjni_thread_attach' */
1271 } /* }}} void cjni_jvm_env_destroy */
1273 static int cjni_config_add_jvm_arg (oconfig_item_t *ci) /* {{{ */
1277 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1279 WARNING ("java plugin: `JVMArg' needs exactly one string argument.");
1283 tmp = (char **) realloc (jvm_argv, sizeof (char *) * (jvm_argc + 1));
1286 ERROR ("java plugin: realloc failed.");
1291 jvm_argv[jvm_argc] = strdup (ci->values[0].value.string);
1292 if (jvm_argv[jvm_argc] == NULL)
1294 ERROR ("java plugin: strdup failed.");
1300 } /* }}} int cjni_config_add_jvm_arg */
1302 static int cjni_config_load_plugin (oconfig_item_t *ci) /* {{{ */
1306 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1308 WARNING ("java plugin: `LoadPlugin' needs exactly one string argument.");
1312 jp = (java_plugin_t *) realloc (java_plugins,
1313 sizeof (*java_plugins) * (java_plugins_num + 1));
1316 ERROR ("java plugin: realloc failed.");
1320 jp = java_plugins + java_plugins_num;
1322 memset (jp, 0, sizeof (*jp));
1323 jp->class_name = strdup (ci->values[0].value.string);
1324 if (jp->class_name == NULL)
1326 ERROR ("java plugin: strdup failed.");
1330 jp->class_ptr = NULL;
1331 jp->object_ptr = NULL;
1334 jp->m_config = NULL;
1338 jp->m_shutdown = NULL;
1343 } /* }}} int cjni_config_load_plugin */
1345 static int cjni_config_plugin_block (oconfig_item_t *ci) /* {{{ */
1348 const char *class_name;
1350 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1352 WARNING ("java plugin: `Plugin' blocks "
1353 "need exactly one string argument.");
1357 class_name = ci->values[0].value.string;
1358 for (i = 0; i < java_plugins_num; i++)
1359 if (strcmp (java_plugins[i].class_name, class_name) == 0)
1362 if (i >= java_plugins_num)
1364 WARNING ("java plugin: Configuration block for the `%s' plugin found, "
1365 "but the plugin has not been loaded. Please note, that the class "
1366 "name is case-sensitive!",
1371 if (java_plugins[i].ci != NULL)
1373 WARNING ("java plugin: There are more than one <Plugin> blocks for the "
1374 "`%s' plugin. This is currently not supported - only the first block "
1380 java_plugins[i].ci = oconfig_clone (ci);
1381 if (java_plugins[i].ci == NULL)
1383 ERROR ("java plugin: cjni_config_plugin_block: "
1384 "oconfig_clone failed for `%s'.",
1389 DEBUG ("java plugin: cjni_config_plugin_block: "
1390 "Successfully copied config for `%s'.",
1394 } /* }}} int cjni_config_plugin_block */
1396 static int cjni_config (oconfig_item_t *ci) /* {{{ */
1406 for (i = 0; i < ci->children_num; i++)
1408 oconfig_item_t *child = ci->children + i;
1410 if (strcasecmp ("JVMArg", child->key) == 0)
1412 status = cjni_config_add_jvm_arg (child);
1418 else if (strcasecmp ("LoadPlugin", child->key) == 0)
1420 status = cjni_config_load_plugin (child);
1426 else if (strcasecmp ("Plugin", child->key) == 0)
1428 status = cjni_config_plugin_block (child);
1436 WARNING ("java plugin: Option `%s' not allowed here.", child->key);
1441 if ((success == 0) && (errors > 0))
1443 ERROR ("java plugin: All statements failed.");
1448 } /* }}} int cjni_config */
1450 static int cjni_write_one_plugin (JNIEnv *jvm_env, /* {{{ */
1451 java_plugin_t *jp, jobject vl_java)
1456 || ((jp->flags & CJNI_FLAG_ENABLED) == 0)
1457 || (jp->m_write == NULL))
1460 DEBUG ("java plugin: Calling: %s.Write(ValueList)", jp->class_name);
1462 status = (*jvm_env)->CallIntMethod (jvm_env, jp->object_ptr,
1463 jp->m_write, vl_java);
1466 ERROR ("java plugin: cjni_write_one_plugin: "
1467 "Calling `Write' on an `%s' object failed with status %i.",
1468 jp->class_name, status);
1473 } /* }}} int cjni_write_one_plugin */
1475 static int cjni_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
1476 user_data_t __attribute__((unused)) *user_data)
1485 ERROR ("java plugin: cjni_write: jvm == NULL");
1489 if ((user_data == NULL) || (user_data->data == NULL))
1491 ERROR ("java plugin: cjni_read: Invalid user data.");
1495 jvm_env = cjni_thread_attach ();
1496 if (jvm_env == NULL)
1499 vl_java = ctoj_value_list (jvm_env, ds, vl);
1500 if (vl_java == NULL)
1502 ERROR ("java plugin: cjni_write_plugins: ctoj_value_list failed.");
1506 jp = (java_plugin_t *) user_data->data;
1508 cjni_write_one_plugin (jvm_env, jp, vl_java);
1510 (*jvm_env)->DeleteLocalRef (jvm_env, vl_java);
1512 status = cjni_thread_detach ();
1517 } /* }}} int cjni_write */
1519 static int cjni_shutdown_one_plugin (JNIEnv *jvm_env, /* {{{ */
1525 || ((jp->flags & CJNI_FLAG_ENABLED) == 0)
1526 || (jp->m_shutdown == NULL))
1529 status = (*jvm_env)->CallIntMethod (jvm_env, jp->object_ptr,
1533 ERROR ("cjni_shutdown_one_plugin: Destroying an `%s' object failed "
1534 "with status %i.", jp->class_name, status);
1537 jp->flags &= ~CJNI_FLAG_ENABLED;
1540 } /* }}} int cjni_shutdown_one_plugin */
1542 static int cjni_shutdown_plugins (JNIEnv *jvm_env) /* {{{ */
1546 for (j = 0; j < java_plugins_num; j++)
1547 cjni_shutdown_one_plugin (jvm_env, &java_plugins[j]);
1550 } /* }}} int cjni_shutdown_plugins */
1552 static int cjni_shutdown (void) /* {{{ */
1555 JavaVMAttachArgs args;
1563 memset (&args, 0, sizeof (args));
1564 args.version = JNI_VERSION_1_2;
1566 status = (*jvm)->AttachCurrentThread (jvm, (void **) &jvm_env, &args);
1569 ERROR ("java plugin: cjni_read: AttachCurrentThread failed with status %i.",
1574 cjni_shutdown_plugins (jvm_env);
1576 (*jvm)->DestroyJavaVM (jvm);
1580 pthread_key_delete (jvm_env_key);
1582 for (i = 0; i < jvm_argc; i++)
1584 sfree (jvm_argv[i]);
1589 for (i = 0; i < java_plugins_num; i++)
1591 sfree (java_plugins[i].class_name);
1592 oconfig_free (java_plugins[i].ci);
1594 sfree (java_plugins);
1595 java_plugins_num = 0;
1598 } /* }}} int cjni_shutdown */
1600 static int cjni_read_one_plugin (JNIEnv *jvm_env, java_plugin_t *jp) /* {{{ */
1605 || ((jp->flags & CJNI_FLAG_ENABLED) == 0)
1606 || (jp->m_read == NULL))
1609 DEBUG ("java plugin: Calling: %s.Read()", jp->class_name);
1611 status = (*jvm_env)->CallIntMethod (jvm_env, jp->object_ptr,
1615 ERROR ("java plugin: cjni_read_one_plugin: "
1616 "Calling `Read' on an `%s' object failed with status %i.",
1617 jp->class_name, status);
1622 } /* }}} int cjni_read_one_plugin */
1624 static int cjni_read (user_data_t *user_data) /* {{{ */
1632 ERROR ("java plugin: cjni_read: jvm == NULL");
1636 if ((user_data == NULL) || (user_data->data == NULL))
1638 ERROR ("java plugin: cjni_read: Invalid user data.");
1642 jvm_env = cjni_thread_attach ();
1643 if (jvm_env == NULL)
1646 jp = (java_plugin_t *) user_data->data;
1648 cjni_read_one_plugin (jvm_env, jp);
1650 status = cjni_thread_detach ();
1655 } /* }}} int cjni_read */
1657 static int cjni_init_one_plugin (JNIEnv *jvm_env, java_plugin_t *jp) /* {{{ */
1659 char plugin_name[128];
1660 jmethodID constructor_id;
1663 jp->class_ptr = (*jvm_env)->FindClass (jvm_env, jp->class_name);
1664 if (jp->class_ptr == NULL)
1666 ERROR ("cjni_init_one_plugin: FindClass (%s) failed.",
1671 constructor_id = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1673 if (constructor_id == NULL)
1675 ERROR ("cjni_init_one_plugin: Could not find the constructor for `%s'.",
1680 jp->object_ptr = (*jvm_env)->NewObject (jvm_env, jp->class_ptr,
1682 if (jp->object_ptr == NULL)
1684 ERROR ("cjni_init_one_plugin: Could create a new `%s' object.",
1689 jp->m_config = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1690 "Config", "(Lorg/collectd/api/OConfigItem;)I");
1691 DEBUG ("java plugin: cjni_init_one_plugin: "
1692 "jp->class_name = %s; jp->m_config = %p;",
1693 jp->class_name, (void *) jp->m_config);
1695 jp->m_init = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1697 DEBUG ("java plugin: cjni_init_one_plugin: "
1698 "jp->class_name = %s; jp->m_init = %p;",
1699 jp->class_name, (void *) jp->m_init);
1701 jp->m_read = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1703 DEBUG ("java plugin: cjni_init_one_plugin: "
1704 "jp->class_name = %s; jp->m_read = %p;",
1705 jp->class_name, (void *) jp->m_read);
1707 jp->m_write = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1708 "Write", "(Lorg/collectd/api/ValueList;)I");
1709 DEBUG ("java plugin: cjni_init_one_plugin: "
1710 "jp->class_name = %s; jp->m_write = %p;",
1711 jp->class_name, (void *) jp->m_write);
1713 jp->m_shutdown = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1715 DEBUG ("java plugin: cjni_init_one_plugin: "
1716 "jp->class_name = %s; jp->m_shutdown = %p;",
1717 jp->class_name, (void *) jp->m_shutdown);
1721 if (jp->m_config == NULL)
1723 WARNING ("java plugin: Configuration for the `%s' plugin is present, "
1724 "but plugin doesn't provide a configuration method.",
1727 else /* if (jp->m_config != NULL) */
1731 o_ocitem = ctoj_oconfig_item (jvm_env, jp->ci);
1732 if (o_ocitem == NULL)
1734 ERROR ("java plugin: Creating an OConfigItem object failed. "
1735 "Can't pass configuration information to the `%s' plugin!",
1738 else /* if (o_ocitem != NULL) */
1740 status = (*jvm_env)->CallIntMethod (jvm_env,
1741 jp->object_ptr, jp->m_config, o_ocitem);
1744 ERROR ("java plugin: cjni_init_one_plugin: "
1745 "Configuring the `%s' object failed with status %i.",
1746 jp->class_name, status);
1747 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
1750 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
1751 } /* if (o_ocitem != NULL) */
1752 } /* if (jp->m_config != NULL) */
1753 } /* if (jp->ci != NULL) */
1755 if (jp->m_init != NULL)
1757 status = (*jvm_env)->CallIntMethod (jvm_env, jp->object_ptr,
1761 ERROR ("java plugin: cjni_init_one_plugin: "
1762 "Initializing `%s' object failed with status %i.",
1763 jp->class_name, status);
1767 jp->flags |= CJNI_FLAG_ENABLED;
1769 ssnprintf (plugin_name, sizeof (plugin_name), "java:%s", jp->class_name);
1770 if (jp->m_read != NULL)
1774 memset (&ud, 0, sizeof (ud));
1776 ud.free_func = NULL;
1778 plugin_register_complex_read (plugin_name, cjni_read, &ud);
1781 if (jp->m_write != NULL)
1785 memset (&ud, 0, sizeof (ud));
1787 ud.free_func = NULL;
1789 plugin_register_write (plugin_name, cjni_write, &ud);
1793 } /* }}} int cjni_init_one_plugin */
1795 static int cjni_init_plugins (JNIEnv *jvm_env) /* {{{ */
1802 for (j = 0; j < java_plugins_num; j++)
1804 cjni_init_one_plugin (jvm_env, &java_plugins[j]);
1806 if (java_plugins[j].m_shutdown != NULL)
1810 if (have_shutdown > 0)
1811 plugin_register_shutdown ("java", cjni_shutdown);
1814 } /* }}} int cjni_init_plugins */
1816 static int cjni_init_native (JNIEnv *jvm_env) /* {{{ */
1818 jclass api_class_ptr;
1821 api_class_ptr = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.CollectdAPI");
1822 if (api_class_ptr == NULL)
1824 ERROR ("cjni_init_native: Cannot find API class `org.collectd.api.CollectdAPI'.");
1828 status = (*jvm_env)->RegisterNatives (jvm_env, api_class_ptr,
1829 jni_api_functions, (jint) jni_api_functions_num);
1832 ERROR ("cjni_init_native: RegisterNatives failed with status %i.", status);
1837 } /* }}} int cjni_init_native */
1839 static int cjni_init (void) /* {{{ */
1842 JavaVMInitArgs vm_args;
1843 JavaVMOption vm_options[jvm_argc];
1851 status = pthread_key_create (&jvm_env_key, cjni_jvm_env_destroy);
1854 ERROR ("java plugin: cjni_init: pthread_key_create failed "
1855 "with status %i.", status);
1861 memset (&vm_args, 0, sizeof (vm_args));
1862 vm_args.version = JNI_VERSION_1_2;
1863 vm_args.options = vm_options;
1864 vm_args.nOptions = (jint) jvm_argc;
1866 for (i = 0; i < jvm_argc; i++)
1868 DEBUG ("java plugin: cjni_init: jvm_argv[%zu] = %s", i, jvm_argv[i]);
1869 vm_args.options[i].optionString = jvm_argv[i];
1872 vm_args.options[0].optionString = "-verbose:jni";
1873 vm_args.options[1].optionString = "-Djava.class.path=/home/octo/collectd/bindings/java";
1876 status = JNI_CreateJavaVM (&jvm, (void **) &jvm_env, (void **) &vm_args);
1879 ERROR ("cjni_init: JNI_CreateJavaVM failed with status %i.",
1883 assert (jvm != NULL);
1884 assert (jvm_env != NULL);
1886 /* Call RegisterNatives */
1887 status = cjni_init_native (jvm_env);
1890 ERROR ("cjni_init: cjni_init_native failed.");
1894 cjni_init_plugins (jvm_env);
1897 } /* }}} int cjni_init */
1899 void module_register (void)
1901 plugin_register_complex_config ("java", cjni_config);
1902 plugin_register_init ("java", cjni_init);
1903 } /* void module_register (void) */
1905 /* vim: set sw=2 sts=2 et fdm=marker : */