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 cjni_jvm_env_s /* {{{ */
41 int reference_counter;
43 typedef struct cjni_jvm_env_s cjni_jvm_env_t;
46 struct java_plugin_class_s /* {{{ */
52 typedef struct java_plugin_class_s java_plugin_class_t;
55 struct java_plugin_config_s /* {{{ */
60 typedef struct java_plugin_config_s java_plugin_config_t;
63 #define CB_TYPE_CONFIG 1
64 #define CB_TYPE_INIT 2
65 #define CB_TYPE_READ 3
66 #define CB_TYPE_WRITE 4
67 #define CB_TYPE_SHUTDOWN 5
68 struct cjni_callback_info_s /* {{{ */
76 typedef struct cjni_callback_info_s cjni_callback_info_t;
82 static JavaVM *jvm = NULL;
83 static pthread_key_t jvm_env_key;
85 /* Configuration options for the JVM. */
86 static char **jvm_argv = NULL;
87 static size_t jvm_argc = 0;
89 /* List of class names to load */
90 static java_plugin_class_t *java_classes_list = NULL;
91 static size_t java_classes_list_len;
93 /* List of `config_item_t's for Java plugins */
94 static java_plugin_config_t *java_plugin_configs = NULL;
95 static size_t java_plugin_configs_num = 0;
97 /* List of config, init, and shutdown callbacks. */
98 static cjni_callback_info_t *java_callbacks = NULL;
99 static size_t java_callbacks_num = 0;
100 static pthread_mutex_t java_callbacks_lock = PTHREAD_MUTEX_INITIALIZER;
105 * Mostly functions that are needed by the Java interface functions.
107 static void cjni_callback_info_destroy (void *arg);
108 static int cjni_read (user_data_t *user_data);
109 static int cjni_write (const data_set_t *ds, const value_list_t *vl,
113 * C to Java conversion functions
115 static int ctoj_string (JNIEnv *jvm_env, /* {{{ */
117 jclass class_ptr, jobject object_ptr, const char *method_name)
122 /* Create a java.lang.String */
123 o_string = (*jvm_env)->NewStringUTF (jvm_env,
124 (string != NULL) ? string : "");
125 if (o_string == NULL)
127 ERROR ("java plugin: ctoj_string: NewStringUTF failed.");
131 /* Search for the `void setFoo (String s)' method. */
132 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
133 method_name, "(Ljava/lang/String;)V");
136 ERROR ("java plugin: ctoj_string: Cannot find method `void %s (String)'.",
138 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
142 /* Call the method. */
143 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, o_string);
145 /* Decrease reference counter on the java.lang.String object. */
146 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
149 } /* }}} int ctoj_string */
151 static int ctoj_int (JNIEnv *jvm_env, /* {{{ */
153 jclass class_ptr, jobject object_ptr, const char *method_name)
157 /* Search for the `void setFoo (int i)' method. */
158 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
159 method_name, "(I)V");
162 ERROR ("java plugin: ctoj_int: Cannot find method `void %s (int)'.",
167 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
170 } /* }}} int ctoj_int */
172 static int ctoj_long (JNIEnv *jvm_env, /* {{{ */
174 jclass class_ptr, jobject object_ptr, const char *method_name)
178 /* Search for the `void setFoo (long l)' method. */
179 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
180 method_name, "(J)V");
183 ERROR ("java plugin: ctoj_long: Cannot find method `void %s (long)'.",
188 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
191 } /* }}} int ctoj_long */
193 static int ctoj_double (JNIEnv *jvm_env, /* {{{ */
195 jclass class_ptr, jobject object_ptr, const char *method_name)
199 /* Search for the `void setFoo (double d)' method. */
200 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
201 method_name, "(D)V");
204 ERROR ("java plugin: ctoj_double: Cannot find method `void %s (double)'.",
209 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
212 } /* }}} int ctoj_double */
214 /* Convert a jlong to a java.lang.Number */
215 static jobject ctoj_jlong_to_number (JNIEnv *jvm_env, jlong value) /* {{{ */
218 jmethodID m_long_constructor;
220 /* Look up the java.lang.Long class */
221 c_long = (*jvm_env)->FindClass (jvm_env, "java.lang.Long");
224 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
225 "java.lang.Long class failed.");
229 m_long_constructor = (*jvm_env)->GetMethodID (jvm_env,
230 c_long, "<init>", "(J)V");
231 if (m_long_constructor == NULL)
233 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
234 "`Long (long)' constructor failed.");
238 return ((*jvm_env)->NewObject (jvm_env,
239 c_long, m_long_constructor, value));
240 } /* }}} jobject ctoj_jlong_to_number */
242 /* Convert a jdouble to a java.lang.Number */
243 static jobject ctoj_jdouble_to_number (JNIEnv *jvm_env, jdouble value) /* {{{ */
246 jmethodID m_double_constructor;
248 /* Look up the java.lang.Long class */
249 c_double = (*jvm_env)->FindClass (jvm_env, "java.lang.Double");
250 if (c_double == NULL)
252 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
253 "java.lang.Double class failed.");
257 m_double_constructor = (*jvm_env)->GetMethodID (jvm_env,
258 c_double, "<init>", "(D)V");
259 if (m_double_constructor == NULL)
261 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
262 "`Double (double)' constructor failed.");
266 return ((*jvm_env)->NewObject (jvm_env,
267 c_double, m_double_constructor, value));
268 } /* }}} jobject ctoj_jdouble_to_number */
270 /* Convert a value_t to a java.lang.Number */
271 static jobject ctoj_value_to_number (JNIEnv *jvm_env, /* {{{ */
272 value_t value, int ds_type)
274 if (ds_type == DS_TYPE_COUNTER)
275 return (ctoj_jlong_to_number (jvm_env, (jlong) value.counter));
276 else if (ds_type == DS_TYPE_GAUGE)
277 return (ctoj_jdouble_to_number (jvm_env, (jdouble) value.gauge));
280 } /* }}} jobject ctoj_value_to_number */
282 /* Convert a data_source_t to a org.collectd.api.DataSource */
283 static jobject ctoj_data_source (JNIEnv *jvm_env, /* {{{ */
284 const data_source_t *dsrc)
287 jmethodID m_datasource_constructor;
288 jobject o_datasource;
291 /* Look up the DataSource class */
292 c_datasource = (*jvm_env)->FindClass (jvm_env,
293 "org.collectd.api.DataSource");
294 if (c_datasource == NULL)
296 ERROR ("java plugin: ctoj_data_source: "
297 "FindClass (org.collectd.api.DataSource) failed.");
301 /* Lookup the `ValueList ()' constructor. */
302 m_datasource_constructor = (*jvm_env)->GetMethodID (jvm_env, c_datasource,
304 if (m_datasource_constructor == NULL)
306 ERROR ("java plugin: ctoj_data_source: Cannot find the "
307 "`DataSource ()' constructor.");
311 /* Create a new instance. */
312 o_datasource = (*jvm_env)->NewObject (jvm_env, c_datasource,
313 m_datasource_constructor);
314 if (o_datasource == NULL)
316 ERROR ("java plugin: ctoj_data_source: "
317 "Creating a new DataSource instance failed.");
321 /* Set name via `void setName (String name)' */
322 status = ctoj_string (jvm_env, dsrc->name,
323 c_datasource, o_datasource, "setName");
326 ERROR ("java plugin: ctoj_data_source: "
327 "ctoj_string (setName) failed.");
328 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
332 /* Set type via `void setType (int type)' */
333 status = ctoj_int (jvm_env, dsrc->type,
334 c_datasource, o_datasource, "setType");
337 ERROR ("java plugin: ctoj_data_source: "
338 "ctoj_int (setType) failed.");
339 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
343 /* Set min via `void setMin (double min)' */
344 status = ctoj_double (jvm_env, dsrc->min,
345 c_datasource, o_datasource, "setMin");
348 ERROR ("java plugin: ctoj_data_source: "
349 "ctoj_double (setMin) failed.");
350 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
354 /* Set max via `void setMax (double max)' */
355 status = ctoj_double (jvm_env, dsrc->max,
356 c_datasource, o_datasource, "setMax");
359 ERROR ("java plugin: ctoj_data_source: "
360 "ctoj_double (setMax) failed.");
361 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
365 return (o_datasource);
366 } /* }}} jobject ctoj_data_source */
368 /* Convert a oconfig_value_t to a org.collectd.api.OConfigValue */
369 static jobject ctoj_oconfig_value (JNIEnv *jvm_env, /* {{{ */
370 oconfig_value_t ocvalue)
373 jmethodID m_ocvalue_constructor;
377 m_ocvalue_constructor = NULL;
380 c_ocvalue = (*jvm_env)->FindClass (jvm_env,
381 "org.collectd.api.OConfigValue");
382 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)
391 jboolean tmp_boolean;
393 tmp_boolean = (ocvalue.value.boolean == 0) ? JNI_FALSE : JNI_TRUE;
395 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
397 if (m_ocvalue_constructor == NULL)
399 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
400 "`OConfigValue (boolean)' constructor.");
404 return ((*jvm_env)->NewObject (jvm_env,
405 c_ocvalue, m_ocvalue_constructor, tmp_boolean));
406 } /* if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) */
407 else if (ocvalue.type == OCONFIG_TYPE_STRING)
409 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
410 "<init>", "(Ljava/lang/String;)V");
411 if (m_ocvalue_constructor == NULL)
413 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
414 "`OConfigValue (String)' constructor.");
418 o_argument = (*jvm_env)->NewStringUTF (jvm_env, ocvalue.value.string);
419 if (o_argument == NULL)
421 ERROR ("java plugin: ctoj_oconfig_value: "
422 "Creating a String object failed.");
426 else if (ocvalue.type == OCONFIG_TYPE_NUMBER)
428 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
429 "<init>", "(Ljava/lang/Number;)V");
430 if (m_ocvalue_constructor == NULL)
432 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
433 "`OConfigValue (Number)' constructor.");
437 o_argument = ctoj_jdouble_to_number (jvm_env,
438 (jdouble) ocvalue.value.number);
439 if (o_argument == NULL)
441 ERROR ("java plugin: ctoj_oconfig_value: "
442 "Creating a Number object failed.");
451 assert (m_ocvalue_constructor != NULL);
452 assert (o_argument != NULL);
454 o_ocvalue = (*jvm_env)->NewObject (jvm_env,
455 c_ocvalue, m_ocvalue_constructor, o_argument);
456 if (o_ocvalue == NULL)
458 ERROR ("java plugin: ctoj_oconfig_value: "
459 "Creating an OConfigValue object failed.");
460 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
464 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
466 } /* }}} jobject ctoj_oconfig_value */
468 /* Convert a oconfig_item_t to a org.collectd.api.OConfigItem */
469 static jobject ctoj_oconfig_item (JNIEnv *jvm_env, /* {{{ */
470 const oconfig_item_t *ci)
473 jmethodID m_ocitem_constructor;
474 jmethodID m_addvalue;
475 jmethodID m_addchild;
480 c_ocitem = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.OConfigItem");
481 if (c_ocitem == NULL)
483 ERROR ("java plugin: ctoj_oconfig_item: "
484 "FindClass (org.collectd.api.OConfigItem) failed.");
488 /* Get the required methods: m_ocitem_constructor, m_addvalue, and m_addchild
490 m_ocitem_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
491 "<init>", "(Ljava/lang/String;)V");
492 if (m_ocitem_constructor == NULL)
494 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
495 "`OConfigItem (String)' constructor.");
499 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
500 "addValue", "(Lorg/collectd/api/OConfigValue;)V");
501 if (m_addvalue == NULL)
503 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
504 "`addValue (OConfigValue)' method.");
508 m_addchild = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
509 "addChild", "(Lorg/collectd/api/OConfigItem;)V");
510 if (m_addchild == NULL)
512 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
513 "`addChild (OConfigItem)' method.");
518 /* Create a String object with the key.
519 * Needed for calling the constructor. */
520 o_key = (*jvm_env)->NewStringUTF (jvm_env, ci->key);
523 ERROR ("java plugin: ctoj_oconfig_item: "
524 "Creating String object failed.");
528 /* Create an OConfigItem object */
529 o_ocitem = (*jvm_env)->NewObject (jvm_env,
530 c_ocitem, m_ocitem_constructor, o_key);
531 if (o_ocitem == NULL)
533 ERROR ("java plugin: ctoj_oconfig_item: "
534 "Creating an OConfigItem object failed.");
535 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
539 /* We don't need the String object any longer.. */
540 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
542 /* Call OConfigItem.addValue for each value */
543 for (i = 0; i < ci->values_num; i++) /* {{{ */
547 o_value = ctoj_oconfig_value (jvm_env, ci->values[i]);
550 ERROR ("java plugin: ctoj_oconfig_item: "
551 "Creating an OConfigValue object failed.");
552 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
556 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_value);
557 (*jvm_env)->DeleteLocalRef (jvm_env, o_value);
558 } /* }}} for (i = 0; i < ci->values_num; i++) */
560 /* Call OConfigItem.addChild for each child */
561 for (i = 0; i < ci->children_num; i++) /* {{{ */
565 o_child = ctoj_oconfig_item (jvm_env, ci->children + i);
568 ERROR ("java plugin: ctoj_oconfig_item: "
569 "Creating an OConfigItem object failed.");
570 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
574 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_child);
575 (*jvm_env)->DeleteLocalRef (jvm_env, o_child);
576 } /* }}} for (i = 0; i < ci->children_num; i++) */
579 } /* }}} jobject ctoj_oconfig_item */
581 /* Convert a data_set_t to a org.collectd.api.DataSet */
582 static jobject ctoj_data_set (JNIEnv *jvm_env, const data_set_t *ds) /* {{{ */
585 jmethodID m_constructor;
591 /* Look up the org.collectd.api.DataSet class */
592 c_dataset = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.DataSet");
593 if (c_dataset == NULL)
595 ERROR ("java plugin: ctoj_data_set: Looking up the "
596 "org.collectd.api.DataSet class failed.");
600 /* Search for the `DataSet (String type)' constructor. */
601 m_constructor = (*jvm_env)->GetMethodID (jvm_env,
602 c_dataset, "<init>", "(Ljava.lang.String;)V");
603 if (m_constructor == NULL)
605 ERROR ("java plugin: ctoj_data_set: Looking up the "
606 "`DataSet (String)' constructor failed.");
610 /* Search for the `void addDataSource (DataSource)' method. */
611 m_add = (*jvm_env)->GetMethodID (jvm_env,
612 c_dataset, "addDataSource", "(Lorg.collectd.api.DataSource;)V");
615 ERROR ("java plugin: ctoj_data_set: Looking up the "
616 "`addDataSource (DataSource)' method failed.");
620 o_type = (*jvm_env)->NewStringUTF (jvm_env, ds->type);
623 ERROR ("java plugin: ctoj_data_set: Creating a String object failed.");
627 o_dataset = (*jvm_env)->NewObject (jvm_env,
628 c_dataset, m_constructor, o_type);
629 if (o_dataset == NULL)
631 ERROR ("java plugin: ctoj_data_set: Creating a DataSet object failed.");
632 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
636 /* Decrease reference counter on the java.lang.String object. */
637 (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
639 for (i = 0; i < ds->ds_num; i++)
641 jobject o_datasource;
643 o_datasource = ctoj_data_source (jvm_env, ds->ds + i);
644 if (o_datasource == NULL)
646 ERROR ("java plugin: ctoj_data_set: ctoj_data_source (%s.%s) failed",
647 ds->type, ds->ds[i].name);
648 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
652 (*jvm_env)->CallVoidMethod (jvm_env, o_dataset, m_add, o_datasource);
654 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
655 } /* for (i = 0; i < ds->ds_num; i++) */
658 } /* }}} jobject ctoj_data_set */
660 static int ctoj_value_list_add_value (JNIEnv *jvm_env, /* {{{ */
661 value_t value, int ds_type,
662 jclass class_ptr, jobject object_ptr)
664 jmethodID m_addvalue;
667 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
668 "addValue", "(Ljava/lang/Number;)V");
669 if (m_addvalue == NULL)
671 ERROR ("java plugin: ctoj_value_list_add_value: "
672 "Cannot find method `void addValue (Number)'.");
676 o_number = ctoj_value_to_number (jvm_env, value, ds_type);
677 if (o_number == NULL)
679 ERROR ("java plugin: ctoj_value_list_add_value: "
680 "ctoj_value_to_number failed.");
684 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_addvalue, o_number);
686 (*jvm_env)->DeleteLocalRef (jvm_env, o_number);
689 } /* }}} int ctoj_value_list_add_value */
691 static int ctoj_value_list_add_data_set (JNIEnv *jvm_env, /* {{{ */
692 jclass c_valuelist, jobject o_valuelist, const data_set_t *ds)
694 jmethodID m_setdataset;
697 /* Look for the `void setDataSource (List<DataSource> ds)' method. */
698 m_setdataset = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
699 "setDataSet", "(Lorg.collectd.api.DataSet;)V");
700 if (m_setdataset == NULL)
702 ERROR ("java plugin: ctoj_value_list_add_data_set: "
703 "Cannot find the `void setDataSet (DataSet)' method.");
707 /* Create a DataSet object. */
708 o_dataset = ctoj_data_set (jvm_env, ds);
709 if (o_dataset == NULL)
711 ERROR ("java plugin: ctoj_value_list_add_data_set: "
712 "ctoj_data_set (%s) failed.", ds->type);
716 /* Actually call the method. */
717 (*jvm_env)->CallVoidMethod (jvm_env,
718 o_valuelist, m_setdataset, o_dataset);
720 /* Decrease reference counter on the List<DataSource> object. */
721 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
724 } /* }}} int ctoj_value_list_add_data_set */
726 static jobject ctoj_value_list (JNIEnv *jvm_env, /* {{{ */
727 const data_set_t *ds, const value_list_t *vl)
730 jmethodID m_valuelist_constructor;
735 /* First, create a new ValueList instance..
736 * Look up the class.. */
737 c_valuelist = (*jvm_env)->FindClass (jvm_env,
738 "org.collectd.api.ValueList");
739 if (c_valuelist == NULL)
741 ERROR ("java plugin: ctoj_value_list: "
742 "FindClass (org.collectd.api.ValueList) failed.");
746 /* Lookup the `ValueList ()' constructor. */
747 m_valuelist_constructor = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
749 if (m_valuelist_constructor == NULL)
751 ERROR ("java plugin: ctoj_value_list: Cannot find the "
752 "`ValueList ()' constructor.");
756 /* Create a new instance. */
757 o_valuelist = (*jvm_env)->NewObject (jvm_env, c_valuelist,
758 m_valuelist_constructor);
759 if (o_valuelist == NULL)
761 ERROR ("java plugin: ctoj_value_list: Creating a new ValueList instance "
766 status = ctoj_value_list_add_data_set (jvm_env,
767 c_valuelist, o_valuelist, ds);
770 ERROR ("java plugin: ctoj_value_list: "
771 "ctoj_value_list_add_data_set failed.");
772 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
776 /* Set the strings.. */
777 #define SET_STRING(str,method_name) do { \
778 status = ctoj_string (jvm_env, str, \
779 c_valuelist, o_valuelist, method_name); \
781 ERROR ("java plugin: ctoj_value_list: jtoc_string (%s) failed.", \
783 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist); \
787 SET_STRING (vl->host, "setHost");
788 SET_STRING (vl->plugin, "setPlugin");
789 SET_STRING (vl->plugin_instance, "setPluginInstance");
790 SET_STRING (vl->type, "setType");
791 SET_STRING (vl->type_instance, "setTypeInstance");
795 /* Set the `time' member. Java stores time in milliseconds. */
796 status = ctoj_long (jvm_env, ((jlong) vl->time) * ((jlong) 1000),
797 c_valuelist, o_valuelist, "setTime");
800 ERROR ("java plugin: ctoj_value_list: ctoj_long (setTime) failed.");
801 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
805 /* Set the `interval' member.. */
806 status = ctoj_long (jvm_env, (jlong) vl->interval,
807 c_valuelist, o_valuelist, "setInterval");
810 ERROR ("java plugin: ctoj_value_list: ctoj_long (setInterval) failed.");
811 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
815 for (i = 0; i < vl->values_len; i++)
817 status = ctoj_value_list_add_value (jvm_env, vl->values[i], ds->ds[i].type,
818 c_valuelist, o_valuelist);
821 ERROR ("java plugin: ctoj_value_list: "
822 "ctoj_value_list_add_value failed.");
823 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
828 return (o_valuelist);
829 } /* }}} int ctoj_value_list */
832 * Java to C conversion functions
834 static int jtoc_string (JNIEnv *jvm_env, /* {{{ */
835 char *buffer, size_t buffer_size,
836 jclass class_ptr, jobject object_ptr, const char *method_name)
842 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
843 method_name, "()Ljava/lang/String;");
844 if (method_id == NULL)
846 ERROR ("java plugin: jtoc_string: Cannot find method `String %s ()'.",
851 string_obj = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, method_id);
852 if (string_obj == NULL)
854 ERROR ("java plugin: jtoc_string: CallObjectMethod (%s) failed.",
859 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, string_obj, 0);
862 ERROR ("java plugin: jtoc_string: GetStringUTFChars failed.");
863 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
867 sstrncpy (buffer, c_str, buffer_size);
869 (*jvm_env)->ReleaseStringUTFChars (jvm_env, string_obj, c_str);
870 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
873 } /* }}} int jtoc_string */
875 static int jtoc_long (JNIEnv *jvm_env, /* {{{ */
877 jclass class_ptr, jobject object_ptr, const char *method_name)
881 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
883 if (method_id == NULL)
885 ERROR ("java plugin: jtoc_long: Cannot find method `long %s ()'.",
890 *ret_value = (*jvm_env)->CallLongMethod (jvm_env, object_ptr, method_id);
893 } /* }}} int jtoc_long */
895 static int jtoc_double (JNIEnv *jvm_env, /* {{{ */
897 jclass class_ptr, jobject object_ptr, const char *method_name)
901 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
903 if (method_id == NULL)
905 ERROR ("java plugin: jtoc_string: Cannot find method `double %s ()'.",
910 *ret_value = (*jvm_env)->CallDoubleMethod (jvm_env, object_ptr, method_id);
913 } /* }}} int jtoc_double */
915 static int jtoc_value (JNIEnv *jvm_env, /* {{{ */
916 value_t *ret_value, int ds_type, jobject object_ptr)
921 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
923 if (ds_type == DS_TYPE_COUNTER)
927 status = jtoc_long (jvm_env, &tmp_long,
928 class_ptr, object_ptr, "longValue");
931 ERROR ("java plugin: jtoc_value: "
932 "jtoc_long failed.");
935 (*ret_value).counter = (counter_t) tmp_long;
941 status = jtoc_double (jvm_env, &tmp_double,
942 class_ptr, object_ptr, "doubleValue");
945 ERROR ("java plugin: jtoc_value: "
946 "jtoc_double failed.");
949 (*ret_value).gauge = (gauge_t) tmp_double;
953 } /* }}} int jtoc_value */
955 static int jtoc_values_array (JNIEnv *jvm_env, /* {{{ */
956 const data_set_t *ds, value_list_t *vl,
957 jclass class_ptr, jobject object_ptr)
959 jmethodID m_getvalues;
962 jobjectArray o_number_array;
968 values_num = ds->ds_num;
971 o_number_array = NULL;
974 #define BAIL_OUT(status) \
976 if (o_number_array != NULL) \
977 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array); \
978 if (o_list != NULL) \
979 (*jvm_env)->DeleteLocalRef (jvm_env, o_list); \
982 /* Call: List<Number> ValueList.getValues () */
983 m_getvalues = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
984 "getValues", "()Ljava/util/List;");
985 if (m_getvalues == NULL)
987 ERROR ("java plugin: jtoc_values_array: "
988 "Cannot find method `List getValues ()'.");
992 o_list = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, m_getvalues);
995 ERROR ("java plugin: jtoc_values_array: "
996 "CallObjectMethod (getValues) failed.");
1000 /* Call: Number[] List.toArray () */
1001 m_toarray = (*jvm_env)->GetMethodID (jvm_env,
1002 (*jvm_env)->GetObjectClass (jvm_env, o_list),
1003 "toArray", "()[Ljava/lang/Object;");
1004 if (m_toarray == NULL)
1006 ERROR ("java plugin: jtoc_values_array: "
1007 "Cannot find method `Object[] toArray ()'.");
1011 o_number_array = (*jvm_env)->CallObjectMethod (jvm_env, o_list, m_toarray);
1012 if (o_number_array == NULL)
1014 ERROR ("java plugin: jtoc_values_array: "
1015 "CallObjectMethod (toArray) failed.");
1019 values = calloc (values_num, sizeof (value_t));
1022 ERROR ("java plugin: jtoc_values_array: calloc failed.");
1026 for (i = 0; i < values_num; i++)
1031 o_number = (*jvm_env)->GetObjectArrayElement (jvm_env,
1032 o_number_array, (jsize) i);
1033 if (o_number == NULL)
1035 ERROR ("java plugin: jtoc_values_array: "
1036 "GetObjectArrayElement (%i) failed.", i);
1040 status = jtoc_value (jvm_env, values + i, ds->ds[i].type, o_number);
1043 ERROR ("java plugin: jtoc_values_array: "
1044 "jtoc_value (%i) failed.", i);
1047 } /* for (i = 0; i < values_num; i++) */
1049 vl->values = values;
1050 vl->values_len = values_num;
1053 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array);
1054 (*jvm_env)->DeleteLocalRef (jvm_env, o_list);
1056 } /* }}} int jtoc_values_array */
1058 /* Convert a org.collectd.api.ValueList to a value_list_t. */
1059 static int jtoc_value_list (JNIEnv *jvm_env, value_list_t *vl, /* {{{ */
1065 const data_set_t *ds;
1067 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1068 if (class_ptr == NULL)
1070 ERROR ("java plugin: jtoc_value_list: GetObjectClass failed.");
1074 #define SET_STRING(buffer,method) do { \
1075 status = jtoc_string (jvm_env, buffer, sizeof (buffer), \
1076 class_ptr, object_ptr, method); \
1077 if (status != 0) { \
1078 ERROR ("java plugin: jtoc_value_list: jtoc_string (%s) failed.", \
1083 SET_STRING(vl->type, "getType");
1085 ds = plugin_get_ds (vl->type);
1088 ERROR ("java plugin: jtoc_value_list: Data-set `%s' is not defined. "
1089 "Please consult the types.db(5) manpage for mor information.",
1094 SET_STRING(vl->host, "getHost");
1095 SET_STRING(vl->plugin, "getPlugin");
1096 SET_STRING(vl->plugin_instance, "getPluginInstance");
1097 SET_STRING(vl->type_instance, "getTypeInstance");
1101 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1104 ERROR ("java plugin: jtoc_value_list: jtoc_long (getTime) failed.");
1107 /* Java measures time in milliseconds. */
1108 vl->time = (time_t) (tmp_long / ((jlong) 1000));
1110 status = jtoc_long (jvm_env, &tmp_long,
1111 class_ptr, object_ptr, "getInterval");
1114 ERROR ("java plugin: jtoc_value_list: jtoc_long (getInterval) failed.");
1117 vl->interval = (int) tmp_long;
1119 status = jtoc_values_array (jvm_env, ds, vl, class_ptr, object_ptr);
1122 ERROR ("java plugin: jtoc_value_list: jtoc_values_array failed.");
1127 } /* }}} int jtoc_value_list */
1129 static cjni_callback_info_t *cjni_callback_info_create (JNIEnv *jvm_env, /* {{{ */
1130 jobject o_name, jobject o_callback, int type)
1133 cjni_callback_info_t *cbi;
1134 const char *method_name;
1135 const char *method_signature;
1139 case CB_TYPE_CONFIG:
1140 method_name = "Config";
1141 method_signature = "(Lorg/collectd/api/OConfigItem;)I";
1145 method_name = "Init";
1146 method_signature = "()I";
1150 method_name = "Read";
1151 method_signature = "()I";
1155 method_name = "Write";
1156 method_signature = "(Lorg/collectd/api/ValueList;)I";
1159 case CB_TYPE_SHUTDOWN:
1160 method_name = "Shutdown";
1161 method_signature = "()I";
1165 ERROR ("java plugin: cjni_callback_info_create: Unknown type: %#x",
1170 c_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_name, 0);
1173 ERROR ("java plugin: cjni_callback_info_create: "
1174 "GetStringUTFChars failed.");
1178 cbi = (cjni_callback_info_t *) malloc (sizeof (*cbi));
1181 ERROR ("java plugin: cjni_callback_info_create: malloc failed.");
1182 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1185 memset (cbi, 0, sizeof (*cbi));
1188 cbi->name = strdup (c_name);
1189 if (cbi->name == NULL)
1191 pthread_mutex_unlock (&java_callbacks_lock);
1192 ERROR ("java plugin: cjni_callback_info_create: strdup failed.");
1193 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1197 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
1199 cbi->class = (*jvm_env)->GetObjectClass (jvm_env, o_callback);
1200 if (cbi->class == NULL)
1202 ERROR ("java plugin: cjni_callback_info_create: GetObjectClass failed.");
1207 cbi->object = o_callback;
1209 cbi->method = (*jvm_env)->GetMethodID (jvm_env, cbi->class,
1210 method_name, method_signature);
1211 if (cbi->method == NULL)
1213 ERROR ("java plugin: cjni_callback_info_create: "
1214 "Cannot find the `%s' method with signature `%s'.",
1215 method_name, method_signature);
1220 (*jvm_env)->NewGlobalRef (jvm_env, o_callback);
1223 } /* }}} cjni_callback_info_t cjni_callback_info_create */
1225 static int cjni_callback_register (JNIEnv *jvm_env, /* {{{ */
1226 jobject o_name, jobject o_callback, int type)
1228 cjni_callback_info_t *cbi;
1229 cjni_callback_info_t *tmp;
1231 const char *type_str;
1234 cbi = cjni_callback_info_create (jvm_env, o_name, o_callback, type);
1241 case CB_TYPE_CONFIG:
1242 type_str = "config";
1249 case CB_TYPE_SHUTDOWN:
1250 type_str = "shutdown";
1254 type_str = "<unknown>";
1256 DEBUG ("java plugin: Registering new %s callback: %s",
1257 type_str, cbi->name);
1260 pthread_mutex_lock (&java_callbacks_lock);
1262 tmp = (cjni_callback_info_t *) realloc (java_callbacks,
1263 (java_callbacks_num + 1) * sizeof (*java_callbacks));
1266 pthread_mutex_unlock (&java_callbacks_lock);
1267 ERROR ("java plugin: cjni_callback_register: realloc failed.");
1269 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1274 java_callbacks = tmp;
1275 java_callbacks[java_callbacks_num] = *cbi;
1276 java_callbacks_num++;
1278 pthread_mutex_unlock (&java_callbacks_lock);
1282 } /* }}} int cjni_callback_register */
1285 * Functions accessible from Java
1287 static jint JNICALL cjni_api_dispatch_values (JNIEnv *jvm_env, /* {{{ */
1288 jobject this, jobject java_vl)
1290 value_list_t vl = VALUE_LIST_INIT;
1293 DEBUG ("cjni_api_dispatch_values: java_vl = %p;", (void *) java_vl);
1295 status = jtoc_value_list (jvm_env, &vl, java_vl);
1298 ERROR ("java plugin: cjni_api_dispatch_values: jtoc_value_list failed.");
1302 status = plugin_dispatch_values (&vl);
1307 } /* }}} jint cjni_api_dispatch_values */
1309 static jobject JNICALL cjni_api_get_ds (JNIEnv *jvm_env, /* {{{ */
1310 jobject this, jobject o_string_type)
1312 const char *ds_name;
1313 const data_set_t *ds;
1316 ds_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_string_type, 0);
1317 if (ds_name == NULL)
1319 ERROR ("java plugin: cjni_api_get_ds: GetStringUTFChars failed.");
1323 ds = plugin_get_ds (ds_name);
1324 DEBUG ("java plugin: cjni_api_get_ds: "
1325 "plugin_get_ds (%s) = %p;", ds_name, (void *) ds);
1327 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_string_type, ds_name);
1332 o_dataset = ctoj_data_set (jvm_env, ds);
1334 } /* }}} jint cjni_api_get_ds */
1336 static jint JNICALL cjni_api_register_config (JNIEnv *jvm_env, /* {{{ */
1337 jobject this, jobject o_name, jobject o_config)
1339 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_CONFIG));
1340 } /* }}} jint cjni_api_register_config */
1342 static jint JNICALL cjni_api_register_init (JNIEnv *jvm_env, /* {{{ */
1343 jobject this, jobject o_name, jobject o_config)
1345 return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_INIT));
1346 } /* }}} jint cjni_api_register_init */
1348 static jint JNICALL cjni_api_register_read (JNIEnv *jvm_env, /* {{{ */
1349 jobject this, jobject o_name, jobject o_read)
1352 cjni_callback_info_t *cbi;
1354 cbi = cjni_callback_info_create (jvm_env, o_name, o_read, CB_TYPE_READ);
1358 DEBUG ("java plugin: Registering new read callback: %s", cbi->name);
1360 memset (&ud, 0, sizeof (ud));
1361 ud.data = (void *) cbi;
1362 ud.free_func = cjni_callback_info_destroy;
1364 plugin_register_complex_read (cbi->name, cjni_read, &ud);
1366 (*jvm_env)->DeleteLocalRef (jvm_env, o_read);
1369 } /* }}} jint cjni_api_register_read */
1371 static jint JNICALL cjni_api_register_write (JNIEnv *jvm_env, /* {{{ */
1372 jobject this, jobject o_name, jobject o_write)
1375 cjni_callback_info_t *cbi;
1377 cbi = cjni_callback_info_create (jvm_env, o_name, o_write, CB_TYPE_WRITE);
1381 DEBUG ("java plugin: Registering new write callback: %s", cbi->name);
1383 memset (&ud, 0, sizeof (ud));
1384 ud.data = (void *) cbi;
1385 ud.free_func = cjni_callback_info_destroy;
1387 plugin_register_write (cbi->name, cjni_write, &ud);
1389 (*jvm_env)->DeleteLocalRef (jvm_env, o_write);
1392 } /* }}} jint cjni_api_register_write */
1394 static jint JNICALL cjni_api_register_shutdown (JNIEnv *jvm_env, /* {{{ */
1395 jobject this, jobject o_name, jobject o_shutdown)
1397 return (cjni_callback_register (jvm_env, o_name, o_shutdown,
1399 } /* }}} jint cjni_api_register_shutdown */
1401 static JNINativeMethod jni_api_functions[] = /* {{{ */
1404 "(Lorg/collectd/api/ValueList;)I",
1405 cjni_api_dispatch_values },
1408 "(Ljava/lang/String;)Lorg/collectd/api/DataSet;",
1412 "(Ljava/lang/String;Lorg/collectd/api/CollectdConfigInterface;)I",
1413 cjni_api_register_config },
1416 "(Ljava/lang/String;Lorg/collectd/api/CollectdInitInterface;)I",
1417 cjni_api_register_init },
1420 "(Ljava/lang/String;Lorg/collectd/api/CollectdReadInterface;)I",
1421 cjni_api_register_read },
1424 "(Ljava/lang/String;Lorg/collectd/api/CollectdWriteInterface;)I",
1425 cjni_api_register_write },
1427 { "RegisterShutdown",
1428 "(Ljava/lang/String;Lorg/collectd/api/CollectdShutdownInterface;)I",
1429 cjni_api_register_shutdown }
1432 static size_t jni_api_functions_num = sizeof (jni_api_functions)
1433 / sizeof (jni_api_functions[0]);
1439 static JNIEnv *cjni_thread_attach (void) /* {{{ */
1441 cjni_jvm_env_t *cjni_env;
1444 cjni_env = pthread_getspecific (jvm_env_key);
1445 if (cjni_env == NULL)
1447 /* This pointer is free'd in `cjni_jvm_env_destroy'. */
1448 cjni_env = (cjni_jvm_env_t *) malloc (sizeof (*cjni_env));
1449 if (cjni_env == NULL)
1451 ERROR ("java plugin: cjni_thread_attach: malloc failed.");
1454 memset (cjni_env, 0, sizeof (*cjni_env));
1455 cjni_env->reference_counter = 0;
1456 cjni_env->jvm_env = NULL;
1458 pthread_setspecific (jvm_env_key, cjni_env);
1461 if (cjni_env->reference_counter > 0)
1463 cjni_env->reference_counter++;
1464 jvm_env = cjni_env->jvm_env;
1469 JavaVMAttachArgs args;
1471 assert (cjni_env->jvm_env == NULL);
1473 memset (&args, 0, sizeof (args));
1474 args.version = JNI_VERSION_1_2;
1476 status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, (void *) &args);
1479 ERROR ("java plugin: cjni_thread_attach: AttachCurrentThread failed "
1480 "with status %i.", status);
1484 cjni_env->reference_counter = 1;
1485 cjni_env->jvm_env = jvm_env;
1488 DEBUG ("java plugin: cjni_thread_attach: cjni_env->reference_counter = %i",
1489 cjni_env->reference_counter);
1490 assert (jvm_env != NULL);
1492 } /* }}} JNIEnv *cjni_thread_attach */
1494 static int cjni_thread_detach (void) /* {{{ */
1496 cjni_jvm_env_t *cjni_env;
1499 cjni_env = pthread_getspecific (jvm_env_key);
1500 if (cjni_env == NULL)
1502 ERROR ("java plugin: cjni_thread_detach: pthread_getspecific failed.");
1506 assert (cjni_env->reference_counter > 0);
1507 assert (cjni_env->jvm_env != NULL);
1509 cjni_env->reference_counter--;
1510 DEBUG ("java plugin: cjni_thread_detach: cjni_env->reference_counter = %i",
1511 cjni_env->reference_counter);
1513 if (cjni_env->reference_counter > 0)
1516 status = (*jvm)->DetachCurrentThread (jvm);
1519 ERROR ("java plugin: cjni_thread_detach: DetachCurrentThread failed "
1520 "with status %i.", status);
1523 cjni_env->reference_counter = 0;
1524 cjni_env->jvm_env = NULL;
1527 } /* }}} JNIEnv *cjni_thread_attach */
1529 static void cjni_jvm_env_destroy (void *args) /* {{{ */
1531 cjni_jvm_env_t *cjni_env;
1536 cjni_env = (cjni_jvm_env_t *) args;
1538 if (cjni_env->reference_counter > 0)
1540 ERROR ("java plugin: cjni_jvm_env_destroy: "
1541 "cjni_env->reference_counter = %i;", cjni_env->reference_counter);
1544 if (cjni_env->jvm_env != NULL)
1546 ERROR ("java plugin: cjni_jvm_env_destroy: cjni_env->jvm_env = %p;",
1547 (void *) cjni_env->jvm_env);
1550 /* The pointer is allocated in `cjni_thread_attach' */
1552 } /* }}} void cjni_jvm_env_destroy */
1555 * Delete a global reference, set by the various `Register*' functions.
1557 static void cjni_callback_info_destroy (void *arg) /* {{{ */
1560 cjni_callback_info_t *cbi;
1562 DEBUG ("java plugin: cjni_callback_info_destroy (arg = %p);", arg);
1567 jvm_env = cjni_thread_attach ();
1568 if (jvm_env == NULL)
1570 ERROR ("java plugin: cjni_callback_info_destroy: cjni_thread_attach failed.");
1574 cbi = (cjni_callback_info_t *) arg;
1576 (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
1583 cjni_thread_detach ();
1584 } /* }}} void cjni_callback_info_destroy */
1586 static int cjni_config_add_jvm_arg (oconfig_item_t *ci) /* {{{ */
1590 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1592 WARNING ("java plugin: `JVMArg' needs exactly one string argument.");
1596 tmp = (char **) realloc (jvm_argv, sizeof (char *) * (jvm_argc + 1));
1599 ERROR ("java plugin: realloc failed.");
1604 jvm_argv[jvm_argc] = strdup (ci->values[0].value.string);
1605 if (jvm_argv[jvm_argc] == NULL)
1607 ERROR ("java plugin: strdup failed.");
1613 } /* }}} int cjni_config_add_jvm_arg */
1615 static int cjni_config_load_plugin (oconfig_item_t *ci) /* {{{ */
1617 java_plugin_class_t *tmp;
1619 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1621 WARNING ("java plugin: `LoadPlugin' needs exactly one string argument.");
1625 tmp = (java_plugin_class_t *) realloc (java_classes_list,
1626 (java_classes_list_len + 1) * sizeof (*java_classes_list));
1629 ERROR ("java plugin: realloc failed.");
1632 java_classes_list = tmp;
1633 tmp = java_classes_list + java_classes_list_len;
1635 memset (tmp, 0, sizeof (*tmp));
1636 tmp->name = strdup (ci->values[0].value.string);
1637 if (tmp->name == NULL)
1639 ERROR ("java plugin: strdup failed.");
1645 java_classes_list_len++;
1648 } /* }}} int cjni_config_load_plugin */
1650 static int cjni_config_plugin_block (oconfig_item_t *ci) /* {{{ */
1652 java_plugin_config_t *tmp;
1656 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1658 WARNING ("java plugin: `Plugin' blocks "
1659 "need exactly one string argument.");
1663 name = strdup (ci->values[0].value.string);
1666 ERROR ("java plugin: cjni_config_plugin_block: strdup faiiled.");
1670 for (i = 0; i < java_plugin_configs_num; i++)
1672 if (strcmp (java_plugin_configs[i].name, name) == 0)
1674 WARNING ("java plugin: There is more than one <Plugin \"%s\"> block. "
1675 "This is currently not supported - "
1676 "only the first block will be used!",
1683 tmp = (java_plugin_config_t *) realloc (java_plugin_configs,
1684 (java_plugin_configs_num + 1) * sizeof (*java_plugin_configs));
1687 ERROR ("java plugin: cjni_config_plugin_block: realloc failed.");
1691 java_plugin_configs = tmp;
1692 tmp = java_plugin_configs + java_plugin_configs_num;
1695 tmp->ci = oconfig_clone (ci);
1696 if (tmp->ci == NULL)
1698 ERROR ("java plugin: cjni_config_plugin_block: "
1699 "oconfig_clone failed for `%s'.",
1705 DEBUG ("java plugin: cjni_config_plugin_block: "
1706 "Successfully copied config for `%s'.",
1709 java_plugin_configs_num++;
1711 } /* }}} int cjni_config_plugin_block */
1713 static int cjni_config (oconfig_item_t *ci) /* {{{ */
1723 for (i = 0; i < ci->children_num; i++)
1725 oconfig_item_t *child = ci->children + i;
1727 if (strcasecmp ("JVMArg", child->key) == 0)
1729 status = cjni_config_add_jvm_arg (child);
1735 else if (strcasecmp ("LoadPlugin", child->key) == 0)
1737 status = cjni_config_load_plugin (child);
1743 else if (strcasecmp ("Plugin", child->key) == 0)
1745 status = cjni_config_plugin_block (child);
1753 WARNING ("java plugin: Option `%s' not allowed here.", child->key);
1758 DEBUG ("java plugin: jvm_argc = %zu;", jvm_argc);
1759 DEBUG ("java plugin: java_classes_list_len = %zu;", java_classes_list_len);
1760 DEBUG ("java plugin: java_plugin_configs_num = %zu;",
1761 java_plugin_configs_num);
1763 if ((success == 0) && (errors > 0))
1765 ERROR ("java plugin: All statements failed.");
1770 } /* }}} int cjni_config */
1772 static int cjni_read (user_data_t *ud) /* {{{ */
1775 cjni_callback_info_t *cbi;
1780 ERROR ("java plugin: cjni_read: jvm == NULL");
1784 if ((ud == NULL) || (ud->data == NULL))
1786 ERROR ("java plugin: cjni_read: Invalid user data.");
1790 jvm_env = cjni_thread_attach ();
1791 if (jvm_env == NULL)
1794 cbi = (cjni_callback_info_t *) ud->data;
1796 status = (*jvm_env)->CallIntMethod (jvm_env, cbi->object,
1799 status = cjni_thread_detach ();
1802 ERROR ("java plugin: cjni_read: cjni_thread_detach failed.");
1807 } /* }}} int cjni_read */
1809 static int cjni_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
1813 cjni_callback_info_t *cbi;
1819 ERROR ("java plugin: cjni_write: jvm == NULL");
1823 if ((ud == NULL) || (ud->data == NULL))
1825 ERROR ("java plugin: cjni_write: Invalid user data.");
1829 jvm_env = cjni_thread_attach ();
1830 if (jvm_env == NULL)
1833 cbi = (cjni_callback_info_t *) ud->data;
1835 vl_java = ctoj_value_list (jvm_env, ds, vl);
1836 if (vl_java == NULL)
1838 ERROR ("java plugin: cjni_write: ctoj_value_list failed.");
1842 status = (*jvm_env)->CallIntMethod (jvm_env,
1843 cbi->object, cbi->method, vl_java);
1845 (*jvm_env)->DeleteLocalRef (jvm_env, vl_java);
1847 status = cjni_thread_detach ();
1850 ERROR ("java plugin: cjni_write: cjni_thread_detach failed.");
1855 } /* }}} int cjni_write */
1858 static int cjni_load_plugins (JNIEnv *jvm_env) /* {{{ */
1862 for (i = 0; i < java_classes_list_len; i++)
1864 java_plugin_class_t *class;
1865 jmethodID constructor_id;
1867 class = java_classes_list + i;
1869 DEBUG ("java plugin: Loading class %s", class->name);
1871 class->class = (*jvm_env)->FindClass (jvm_env, class->name);
1872 if (class->class == NULL)
1874 ERROR ("java plugin: cjni_load_plugins: FindClass (%s) failed.",
1879 constructor_id = (*jvm_env)->GetMethodID (jvm_env, class->class,
1881 if (constructor_id == NULL)
1883 ERROR ("java plugin: cjni_load_plugins: Could not find the constructor for `%s'.",
1888 class->object = (*jvm_env)->NewObject (jvm_env, class->class,
1890 if (class->object == NULL)
1892 ERROR ("java plugin: cjni_load_plugins: Could create a new `%s' object.",
1897 (*jvm_env)->NewGlobalRef (jvm_env, class->object);
1898 } /* for (i = 0; i < java_classes_list_len; i++) */
1901 } /* }}} int cjni_load_plugins */
1903 static int cjni_config_plugins (JNIEnv *jvm_env) /* {{{ */
1909 for (i = 0; i < java_plugin_configs_num; i++)
1913 if (java_plugin_configs[i].ci == NULL)
1916 for (j = 0; j < java_callbacks_num; j++)
1918 if (java_callbacks[j].type != CB_TYPE_CONFIG)
1921 if (strcmp (java_plugin_configs[i].name, java_callbacks[j].name) == 0)
1925 if (j >= java_callbacks_num)
1927 NOTICE ("java plugin: Configuration for `%s' is present, but no such "
1928 "configuration callback has been registered.",
1929 java_plugin_configs[i].name);
1933 DEBUG ("java plugin: Configuring %s", java_plugin_configs[i].name);
1935 o_ocitem = ctoj_oconfig_item (jvm_env, java_plugin_configs[i].ci);
1936 if (o_ocitem == NULL)
1938 ERROR ("java plugin: cjni_config_plugins: ctoj_oconfig_item failed.");
1942 status = (*jvm_env)->CallIntMethod (jvm_env,
1943 java_callbacks[j].object, java_callbacks[j].method, o_ocitem);
1944 WARNING ("java plugin: Config callback for `%s' returned status %i.",
1945 java_plugin_configs[i].name, status);
1946 } /* for (i = 0; i < java_plugin_configs; i++) */
1949 } /* }}} int cjni_config_plugins */
1951 static int cjni_init_plugins (JNIEnv *jvm_env) /* {{{ */
1956 for (i = 0; i < java_callbacks_num; i++)
1958 if (java_callbacks[i].type != CB_TYPE_INIT)
1961 DEBUG ("java plugin: Initializing %s", java_callbacks[i].name);
1963 status = (*jvm_env)->CallIntMethod (jvm_env,
1964 java_callbacks[i].object, java_callbacks[i].method);
1967 ERROR ("java plugin: Initializing `%s' failed with status %i. "
1968 "Removing read function.",
1969 java_callbacks[i].name, status);
1970 plugin_unregister_read (java_callbacks[i].name);
1975 } /* }}} int cjni_init_plugins */
1977 static int cjni_shutdown_plugins (JNIEnv *jvm_env) /* {{{ */
1982 for (i = 0; i < java_callbacks_num; i++)
1984 if (java_callbacks[i].type != CB_TYPE_SHUTDOWN)
1987 DEBUG ("java plugin: Shutting down %s", java_callbacks[i].name);
1989 status = (*jvm_env)->CallIntMethod (jvm_env,
1990 java_callbacks[i].object, java_callbacks[i].method);
1993 ERROR ("java plugin: Shutting down `%s' failed with status %i. ",
1994 java_callbacks[i].name, status);
1999 } /* }}} int cjni_shutdown_plugins */
2002 static int cjni_shutdown (void) /* {{{ */
2005 JavaVMAttachArgs args;
2013 memset (&args, 0, sizeof (args));
2014 args.version = JNI_VERSION_1_2;
2016 status = (*jvm)->AttachCurrentThread (jvm, (void **) &jvm_env, &args);
2019 ERROR ("java plugin: cjni_shutdown: AttachCurrentThread failed with status %i.",
2024 /* Execute all the shutdown functions registered by plugins. */
2025 cjni_shutdown_plugins (jvm_env);
2027 /* Release all the global references to callback functions */
2028 for (i = 0; i < java_callbacks_num; i++)
2030 if (java_callbacks[i].object != NULL)
2032 (*jvm_env)->DeleteGlobalRef (jvm_env, java_callbacks[i].object);
2033 java_callbacks[i].object = NULL;
2035 sfree (java_callbacks[i].name);
2037 java_callbacks_num = 0;
2038 sfree (java_callbacks);
2040 /* Release all the global references to directly loaded classes. */
2041 for (i = 0; i < java_classes_list_len; i++)
2043 if (java_classes_list[i].object != NULL)
2045 (*jvm_env)->DeleteGlobalRef (jvm_env, java_classes_list[i].object);
2046 java_classes_list[i].object = NULL;
2048 sfree (java_classes_list[i].name);
2050 java_classes_list_len = 0;
2051 sfree (java_classes_list);
2053 /* Destroy the JVM */
2054 (*jvm)->DestroyJavaVM (jvm);
2058 pthread_key_delete (jvm_env_key);
2060 /* Free the JVM argument list */
2061 for (i = 0; i < jvm_argc; i++)
2062 sfree (jvm_argv[i]);
2066 /* Free the copied configuration */
2067 for (i = 0; i < java_plugin_configs_num; i++)
2069 sfree (java_plugin_configs[i].name);
2070 oconfig_free (java_plugin_configs[i].ci);
2072 java_plugin_configs_num = 0;
2073 sfree (java_plugin_configs);
2076 } /* }}} int cjni_shutdown */
2078 static int cjni_init_native (JNIEnv *jvm_env) /* {{{ */
2080 jclass api_class_ptr;
2083 api_class_ptr = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.CollectdAPI");
2084 if (api_class_ptr == NULL)
2086 ERROR ("cjni_init_native: Cannot find API class `org.collectd.api.CollectdAPI'.");
2090 status = (*jvm_env)->RegisterNatives (jvm_env, api_class_ptr,
2091 jni_api_functions, (jint) jni_api_functions_num);
2094 ERROR ("cjni_init_native: RegisterNatives failed with status %i.", status);
2099 } /* }}} int cjni_init_native */
2101 static int cjni_init (void) /* {{{ */
2104 JavaVMInitArgs vm_args;
2105 JavaVMOption vm_options[jvm_argc];
2113 status = pthread_key_create (&jvm_env_key, cjni_jvm_env_destroy);
2116 ERROR ("java plugin: cjni_init: pthread_key_create failed "
2117 "with status %i.", status);
2123 memset (&vm_args, 0, sizeof (vm_args));
2124 vm_args.version = JNI_VERSION_1_2;
2125 vm_args.options = vm_options;
2126 vm_args.nOptions = (jint) jvm_argc;
2128 for (i = 0; i < jvm_argc; i++)
2130 DEBUG ("java plugin: cjni_init: jvm_argv[%zu] = %s", i, jvm_argv[i]);
2131 vm_args.options[i].optionString = jvm_argv[i];
2134 vm_args.options[0].optionString = "-verbose:jni";
2135 vm_args.options[1].optionString = "-Djava.class.path=/home/octo/collectd/bindings/java";
2138 status = JNI_CreateJavaVM (&jvm, (void **) &jvm_env, (void **) &vm_args);
2141 ERROR ("cjni_init: JNI_CreateJavaVM failed with status %i.",
2145 assert (jvm != NULL);
2146 assert (jvm_env != NULL);
2148 /* Call RegisterNatives */
2149 status = cjni_init_native (jvm_env);
2152 ERROR ("cjni_init: cjni_init_native failed.");
2156 cjni_load_plugins (jvm_env);
2157 cjni_config_plugins (jvm_env);
2158 cjni_init_plugins (jvm_env);
2161 } /* }}} int cjni_init */
2163 void module_register (void)
2165 plugin_register_complex_config ("java", cjni_config);
2166 plugin_register_init ("java", cjni_init);
2167 plugin_register_shutdown ("java", cjni_shutdown);
2168 } /* void module_register (void) */
2170 /* vim: set sw=2 sts=2 et fdm=marker : */