779847edbf12452251d13f3c15bea292e3305278
1 /**
2 * collectd - src/java.c
3 * Copyright (C) 2009 Florian octo Forster
4 * Copyright (C) 2008 Justo Alonso Achaques
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Florian octo Forster <octo at verplant.org>
21 * Justo Alonso Achaques <justo.alonso at gmail.com>
22 **/
24 #include "collectd.h"
25 #include "plugin.h"
26 #include "common.h"
28 #include <pthread.h>
29 #include <jni.h>
31 #if !defined(JNI_VERSION_1_2)
32 # error "Need JNI 1.2 compatible interface!"
33 #endif
35 /*
36 * Types
37 */
38 struct java_plugin_s /* {{{ */
39 {
40 char *class_name;
41 jclass class_ptr;
42 jobject object_ptr;
44 oconfig_item_t *ci;
46 #define CJNI_FLAG_ENABLED 0x0001
47 int flags;
49 jmethodID m_config;
50 jmethodID m_init;
51 jmethodID m_read;
52 jmethodID m_write;
53 jmethodID m_shutdown;
54 };
55 typedef struct java_plugin_s java_plugin_t;
56 /* }}} */
58 /*
59 * Global variables
60 */
61 static JavaVM *jvm = NULL;
63 static char **jvm_argv = NULL;
64 static size_t jvm_argc = 0;
66 static java_plugin_t *java_plugins = NULL;
67 static size_t java_plugins_num = 0;
69 /*
70 * C to Java conversion functions
71 */
72 static int ctoj_string (JNIEnv *jvm_env, /* {{{ */
73 const char *string,
74 jclass class_ptr, jobject object_ptr, const char *method_name)
75 {
76 jmethodID m_set;
77 jstring o_string;
79 /* Create a java.lang.String */
80 o_string = (*jvm_env)->NewStringUTF (jvm_env,
81 (string != NULL) ? string : "");
82 if (o_string == NULL)
83 {
84 ERROR ("java plugin: ctoj_string: NewStringUTF failed.");
85 return (-1);
86 }
88 /* Search for the `void setFoo (String s)' method. */
89 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
90 method_name, "(Ljava/lang/String;)V");
91 if (m_set == NULL)
92 {
93 ERROR ("java plugin: ctoj_string: Cannot find method `void %s (String)'.",
94 method_name);
95 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
96 return (-1);
97 }
99 /* Call the method. */
100 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, o_string);
102 /* Decrease reference counter on the java.lang.String object. */
103 (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
105 DEBUG ("java plugin: ctoj_string: ->%s (%s);",
106 method_name, (string != NULL) ? string : "");
108 return (0);
109 } /* }}} int ctoj_string */
111 static int ctoj_int (JNIEnv *jvm_env, /* {{{ */
112 jint value,
113 jclass class_ptr, jobject object_ptr, const char *method_name)
114 {
115 jmethodID m_set;
117 /* Search for the `void setFoo (int i)' method. */
118 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
119 method_name, "(I)V");
120 if (m_set == NULL)
121 {
122 ERROR ("java plugin: ctoj_int: Cannot find method `void %s (int)'.",
123 method_name);
124 return (-1);
125 }
127 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
129 DEBUG ("java plugin: ctoj_int: ->%s (%i);",
130 method_name, (int) value);
132 return (0);
133 } /* }}} int ctoj_int */
135 static int ctoj_long (JNIEnv *jvm_env, /* {{{ */
136 jlong value,
137 jclass class_ptr, jobject object_ptr, const char *method_name)
138 {
139 jmethodID m_set;
141 /* Search for the `void setFoo (long l)' method. */
142 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
143 method_name, "(J)V");
144 if (m_set == NULL)
145 {
146 ERROR ("java plugin: ctoj_long: Cannot find method `void %s (long)'.",
147 method_name);
148 return (-1);
149 }
151 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
153 DEBUG ("java plugin: ctoj_long: ->%s (%"PRIi64");",
154 method_name, (int64_t) value);
156 return (0);
157 } /* }}} int ctoj_long */
159 static int ctoj_double (JNIEnv *jvm_env, /* {{{ */
160 jdouble value,
161 jclass class_ptr, jobject object_ptr, const char *method_name)
162 {
163 jmethodID m_set;
165 /* Search for the `void setFoo (double d)' method. */
166 m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
167 method_name, "(D)V");
168 if (m_set == NULL)
169 {
170 ERROR ("java plugin: ctoj_double: Cannot find method `void %s (double)'.",
171 method_name);
172 return (-1);
173 }
175 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
177 DEBUG ("java plugin: ctoj_double: ->%s (%g);",
178 method_name, (double) value);
180 return (0);
181 } /* }}} int ctoj_double */
183 /* Convert a jlong to a java.lang.Number */
184 static jobject ctoj_jlong_to_number (JNIEnv *jvm_env, jlong value) /* {{{ */
185 {
186 jclass c_long;
187 jmethodID m_long_constructor;
189 /* Look up the java.lang.Long class */
190 c_long = (*jvm_env)->FindClass (jvm_env, "java.lang.Long");
191 if (c_long == NULL)
192 {
193 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
194 "java.lang.Long class failed.");
195 return (NULL);
196 }
198 m_long_constructor = (*jvm_env)->GetMethodID (jvm_env,
199 c_long, "<init>", "(J)V");
200 if (m_long_constructor == NULL)
201 {
202 ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
203 "`Long (long)' constructor failed.");
204 return (NULL);
205 }
207 return ((*jvm_env)->NewObject (jvm_env,
208 c_long, m_long_constructor, value));
209 } /* }}} jobject ctoj_jlong_to_number */
211 /* Convert a jdouble to a java.lang.Number */
212 static jobject ctoj_jdouble_to_number (JNIEnv *jvm_env, jdouble value) /* {{{ */
213 {
214 jclass c_double;
215 jmethodID m_double_constructor;
217 /* Look up the java.lang.Long class */
218 c_double = (*jvm_env)->FindClass (jvm_env, "java.lang.Double");
219 if (c_double == NULL)
220 {
221 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
222 "java.lang.Double class failed.");
223 return (NULL);
224 }
226 m_double_constructor = (*jvm_env)->GetMethodID (jvm_env,
227 c_double, "<init>", "(D)V");
228 if (m_double_constructor == NULL)
229 {
230 ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
231 "`Double (double)' constructor failed.");
232 return (NULL);
233 }
235 return ((*jvm_env)->NewObject (jvm_env,
236 c_double, m_double_constructor, value));
237 } /* }}} jobject ctoj_jdouble_to_number */
239 /* Convert a value_t to a java.lang.Number */
240 static jobject ctoj_value_to_number (JNIEnv *jvm_env, /* {{{ */
241 value_t value, int ds_type)
242 {
243 if (ds_type == DS_TYPE_COUNTER)
244 return (ctoj_jlong_to_number (jvm_env, (jlong) value.counter));
245 else if (ds_type == DS_TYPE_GAUGE)
246 return (ctoj_jdouble_to_number (jvm_env, (jdouble) value.gauge));
247 else
248 return (NULL);
249 } /* }}} jobject ctoj_value_to_number */
251 /* Convert a data_source_t to a org.collectd.protocol.DataSource */
252 static jobject ctoj_data_source (JNIEnv *jvm_env, /* {{{ */
253 const data_source_t *dsrc)
254 {
255 jclass c_datasource;
256 jmethodID m_datasource_constructor;
257 jobject o_datasource;
258 int status;
260 /* Look up the DataSource class */
261 c_datasource = (*jvm_env)->FindClass (jvm_env,
262 "org.collectd.protocol.DataSource");
263 if (c_datasource == NULL)
264 {
265 ERROR ("java plugin: ctoj_data_source: "
266 "FindClass (org.collectd.protocol.DataSource) failed.");
267 return (NULL);
268 }
270 /* Lookup the `ValueList ()' constructor. */
271 m_datasource_constructor = (*jvm_env)->GetMethodID (jvm_env, c_datasource,
272 "<init>", "()V");
273 if (m_datasource_constructor == NULL)
274 {
275 ERROR ("java plugin: ctoj_data_source: Cannot find the "
276 "`DataSource ()' constructor.");
277 return (NULL);
278 }
280 /* Create a new instance. */
281 o_datasource = (*jvm_env)->NewObject (jvm_env, c_datasource,
282 m_datasource_constructor);
283 if (o_datasource == NULL)
284 {
285 ERROR ("java plugin: ctoj_data_source: "
286 "Creating a new DataSource instance failed.");
287 return (NULL);
288 }
290 /* Set name via `void setName (String name)' */
291 status = ctoj_string (jvm_env, dsrc->name,
292 c_datasource, o_datasource, "setName");
293 if (status != 0)
294 {
295 ERROR ("java plugin: ctoj_data_source: "
296 "ctoj_string (setName) failed.");
297 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
298 return (NULL);
299 }
301 /* Set type via `void setType (int type)' */
302 status = ctoj_int (jvm_env, dsrc->type,
303 c_datasource, o_datasource, "setType");
304 if (status != 0)
305 {
306 ERROR ("java plugin: ctoj_data_source: "
307 "ctoj_int (setType) failed.");
308 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
309 return (NULL);
310 }
312 /* Set min via `void setMin (double min)' */
313 status = ctoj_double (jvm_env, dsrc->min,
314 c_datasource, o_datasource, "setMin");
315 if (status != 0)
316 {
317 ERROR ("java plugin: ctoj_data_source: "
318 "ctoj_double (setMin) failed.");
319 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
320 return (NULL);
321 }
323 /* Set max via `void setMax (double max)' */
324 status = ctoj_double (jvm_env, dsrc->max,
325 c_datasource, o_datasource, "setMax");
326 if (status != 0)
327 {
328 ERROR ("java plugin: ctoj_data_source: "
329 "ctoj_double (setMax) failed.");
330 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
331 return (NULL);
332 }
334 return (o_datasource);
335 } /* }}} jobject ctoj_data_source */
337 /* Convert a oconfig_value_t to a org.collectd.api.OConfigValue */
338 static jobject ctoj_oconfig_value (JNIEnv *jvm_env, /* {{{ */
339 oconfig_value_t ocvalue)
340 {
341 jclass c_ocvalue;
342 jmethodID m_ocvalue_constructor;
343 jobject o_argument;
344 jobject o_ocvalue;
346 m_ocvalue_constructor = NULL;
347 o_argument = NULL;
349 c_ocvalue = (*jvm_env)->FindClass (jvm_env,
350 "org.collectd.api.OConfigValue");
351 if (c_ocvalue == NULL)
352 {
353 ERROR ("java plugin: ctoj_oconfig_value: "
354 "FindClass (org.collectd.api.OConfigValue) failed.");
355 return (NULL);
356 }
358 if (ocvalue.type == OCONFIG_TYPE_BOOLEAN)
359 {
360 jboolean tmp_boolean;
362 tmp_boolean = (ocvalue.value.boolean == 0) ? JNI_FALSE : JNI_TRUE;
364 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
365 "<init>", "(Z)V");
366 if (m_ocvalue_constructor == NULL)
367 {
368 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
369 "`OConfigValue (boolean)' constructor.");
370 return (NULL);
371 }
373 return ((*jvm_env)->NewObject (jvm_env,
374 c_ocvalue, m_ocvalue_constructor, tmp_boolean));
375 } /* if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) */
376 else if (ocvalue.type == OCONFIG_TYPE_STRING)
377 {
378 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
379 "<init>", "(Ljava/lang/String;)V");
380 if (m_ocvalue_constructor == NULL)
381 {
382 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
383 "`OConfigValue (String)' constructor.");
384 return (NULL);
385 }
387 o_argument = (*jvm_env)->NewStringUTF (jvm_env, ocvalue.value.string);
388 if (o_argument == NULL)
389 {
390 ERROR ("java plugin: ctoj_oconfig_value: "
391 "Creating a String object failed.");
392 return (NULL);
393 }
394 }
395 else if (ocvalue.type == OCONFIG_TYPE_NUMBER)
396 {
397 m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
398 "<init>", "(Ljava/lang/Number;)V");
399 if (m_ocvalue_constructor == NULL)
400 {
401 ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
402 "`OConfigValue (Number)' constructor.");
403 return (NULL);
404 }
406 o_argument = ctoj_jdouble_to_number (jvm_env,
407 (jdouble) ocvalue.value.number);
408 if (o_argument == NULL)
409 {
410 ERROR ("java plugin: ctoj_oconfig_value: "
411 "Creating a Number object failed.");
412 return (NULL);
413 }
414 }
415 else
416 {
417 return (NULL);
418 }
420 assert (m_ocvalue_constructor != NULL);
421 assert (o_argument != NULL);
423 o_ocvalue = (*jvm_env)->NewObject (jvm_env,
424 c_ocvalue, m_ocvalue_constructor, o_argument);
425 if (o_ocvalue == NULL)
426 {
427 ERROR ("java plugin: ctoj_oconfig_value: "
428 "Creating an OConfigValue object failed.");
429 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
430 return (NULL);
431 }
433 (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
434 return (o_ocvalue);
435 } /* }}} jobject ctoj_oconfig_value */
437 /* Convert a oconfig_item_t to a org.collectd.api.OConfigItem */
438 static jobject ctoj_oconfig_item (JNIEnv *jvm_env, /* {{{ */
439 const oconfig_item_t *ci)
440 {
441 jclass c_ocitem;
442 jmethodID m_ocitem_constructor;
443 jmethodID m_addvalue;
444 jmethodID m_addchild;
445 jobject o_key;
446 jobject o_ocitem;
447 int i;
449 c_ocitem = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.OConfigItem");
450 if (c_ocitem == NULL)
451 {
452 ERROR ("java plugin: ctoj_oconfig_item: "
453 "FindClass (org.collectd.api.OConfigItem) failed.");
454 return (NULL);
455 }
457 /* Get the required methods: m_ocitem_constructor, m_addvalue, and m_addchild
458 * {{{ */
459 m_ocitem_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
460 "<init>", "(Ljava/lang/String;)V");
461 if (m_ocitem_constructor == NULL)
462 {
463 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
464 "`OConfigItem (String)' constructor.");
465 return (NULL);
466 }
468 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
469 "addValue", "(Lorg/collectd/api/OConfigValue;)V");
470 if (m_addvalue == NULL)
471 {
472 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
473 "`addValue (OConfigValue)' method.");
474 return (NULL);
475 }
477 m_addchild = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
478 "addChild", "(Lorg/collectd/api/OConfigItem;)V");
479 if (m_addchild == NULL)
480 {
481 ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
482 "`addChild (OConfigItem)' method.");
483 return (NULL);
484 }
485 /* }}} */
487 /* Create a String object with the key.
488 * Needed for calling the constructor. */
489 o_key = (*jvm_env)->NewStringUTF (jvm_env, ci->key);
490 if (o_key == NULL)
491 {
492 ERROR ("java plugin: ctoj_oconfig_item: "
493 "Creating String object failed.");
494 return (NULL);
495 }
497 /* Create an OConfigItem object */
498 o_ocitem = (*jvm_env)->NewObject (jvm_env,
499 c_ocitem, m_ocitem_constructor, o_key);
500 if (o_ocitem == NULL)
501 {
502 ERROR ("java plugin: ctoj_oconfig_item: "
503 "Creating an OConfigItem object failed.");
504 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
505 return (NULL);
506 }
508 /* We don't need the String object any longer.. */
509 (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
511 /* Call OConfigItem.addValue for each value */
512 for (i = 0; i < ci->values_num; i++) /* {{{ */
513 {
514 jobject o_value;
516 o_value = ctoj_oconfig_value (jvm_env, ci->values[i]);
517 if (o_value == NULL)
518 {
519 ERROR ("java plugin: ctoj_oconfig_item: "
520 "Creating an OConfigValue object failed.");
521 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
522 return (NULL);
523 }
525 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_value);
526 (*jvm_env)->DeleteLocalRef (jvm_env, o_value);
527 } /* }}} for (i = 0; i < ci->values_num; i++) */
529 /* Call OConfigItem.addChild for each child */
530 for (i = 0; i < ci->children_num; i++) /* {{{ */
531 {
532 jobject o_child;
534 o_child = ctoj_oconfig_item (jvm_env, ci->children + i);
535 if (o_child == NULL)
536 {
537 ERROR ("java plugin: ctoj_oconfig_item: "
538 "Creating an OConfigItem object failed.");
539 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
540 return (NULL);
541 }
543 (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_child);
544 (*jvm_env)->DeleteLocalRef (jvm_env, o_child);
545 } /* }}} for (i = 0; i < ci->children_num; i++) */
547 return (o_ocitem);
548 } /* }}} jobject ctoj_oconfig_item */
550 /* Convert a data_set_t to a java.util.List<DataSource> */
551 static jobject ctoj_data_set (JNIEnv *jvm_env, const data_set_t *ds) /* {{{ */
552 {
553 jclass c_arraylist;
554 jmethodID m_constructor;
555 jmethodID m_add;
556 jobject o_dataset;
557 int i;
559 /* Look up the java.util.ArrayList class */
560 c_arraylist = (*jvm_env)->FindClass (jvm_env, "java.util.ArrayList");
561 if (c_arraylist == NULL)
562 {
563 ERROR ("java plugin: ctoj_data_set: Looking up the "
564 "java.util.ArrayList class failed.");
565 return (NULL);
566 }
568 /* Search for the `ArrayList (int capacity)' constructor. */
569 m_constructor = (*jvm_env)->GetMethodID (jvm_env,
570 c_arraylist, "<init>", "()V");
571 if (m_constructor == NULL)
572 {
573 ERROR ("java plugin: ctoj_data_set: Looking up the "
574 "`ArrayList (void)' constructor failed.");
575 return (NULL);
576 }
578 /* Search for the `boolean add (Object element)' method. */
579 m_add = (*jvm_env)->GetMethodID (jvm_env,
580 c_arraylist, "add", "(Ljava/lang/Object;)Z");
581 if (m_add == NULL)
582 {
583 ERROR ("java plugin: ctoj_data_set: Looking up the "
584 "`add (Object)' method failed.");
585 return (NULL);
586 }
588 o_dataset = (*jvm_env)->NewObject (jvm_env, c_arraylist, m_constructor);
589 if (o_dataset == NULL)
590 {
591 ERROR ("java plugin: ctoj_data_set: "
592 "Creating an ArrayList object failed.");
593 return (NULL);
594 }
596 for (i = 0; i < ds->ds_num; i++)
597 {
598 jobject o_datasource;
599 jboolean status;
601 o_datasource = ctoj_data_source (jvm_env, ds->ds + i);
602 if (o_datasource == NULL)
603 {
604 ERROR ("java plugin: ctoj_data_set: ctoj_data_source (%s.%s) failed",
605 ds->type, ds->ds[i].name);
606 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
607 return (NULL);
608 }
610 status = (*jvm_env)->CallBooleanMethod (jvm_env,
611 o_dataset, m_add, o_datasource);
612 if (!status)
613 {
614 ERROR ("java plugin: ctoj_data_set: ArrayList.add returned FALSE.");
615 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
616 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
617 return (NULL);
618 }
620 (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
621 } /* for (i = 0; i < ds->ds_num; i++) */
623 return (o_dataset);
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)
629 {
630 jmethodID m_addvalue;
631 jobject o_number;
633 m_addvalue = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
634 "addValue", "(Ljava/lang/Number;)V");
635 if (m_addvalue == NULL)
636 {
637 ERROR ("java plugin: ctoj_value_list_add_value: "
638 "Cannot find method `void addValue (Number)'.");
639 return (-1);
640 }
642 o_number = ctoj_value_to_number (jvm_env, value, ds_type);
643 if (o_number == NULL)
644 {
645 ERROR ("java plugin: ctoj_value_list_add_value: "
646 "ctoj_value_to_number failed.");
647 return (-1);
648 }
650 (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_addvalue, o_number);
652 (*jvm_env)->DeleteLocalRef (jvm_env, o_number);
654 return (0);
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)
659 {
660 jmethodID m_setdatasource;
661 jobject o_dataset;
663 /* Look for the `void setDataSource (List<DataSource> ds)' method. */
664 m_setdatasource = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
665 "setDataSource", "(Ljava/util/List;)V");
666 if (m_setdatasource == NULL)
667 {
668 ERROR ("java plugin: ctoj_value_list_add_data_set: "
669 "Cannot find the `void setDataSource (List<DataSource> ds)' method.");
670 return (-1);
671 }
673 /* Create a List<DataSource> object. */
674 o_dataset = ctoj_data_set (jvm_env, ds);
675 if (o_dataset == NULL)
676 {
677 ERROR ("java plugin: ctoj_value_list_add_data_set: "
678 "ctoj_data_set (%s) failed.", ds->type);
679 return (-1);
680 }
682 /* Actually call the method. */
683 (*jvm_env)->CallVoidMethod (jvm_env,
684 o_valuelist, m_setdatasource, o_dataset);
686 /* Decrease reference counter on the List<DataSource> object. */
687 (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
689 return (0);
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)
694 {
695 jclass c_valuelist;
696 jmethodID m_valuelist_constructor;
697 jobject o_valuelist;
698 int status;
699 int i;
701 /* First, create a new ValueList instance..
702 * Look up the class.. */
703 c_valuelist = (*jvm_env)->FindClass (jvm_env,
704 "org.collectd.protocol.ValueList");
705 if (c_valuelist == NULL)
706 {
707 ERROR ("java plugin: ctoj_value_list: "
708 "FindClass (org.collectd.protocol.ValueList) failed.");
709 return (NULL);
710 }
712 /* Lookup the `ValueList ()' constructor. */
713 m_valuelist_constructor = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
714 "<init>", "()V");
715 if (m_valuelist_constructor == NULL)
716 {
717 ERROR ("java plugin: ctoj_value_list: Cannot find the "
718 "`ValueList ()' constructor.");
719 return (NULL);
720 }
722 /* Create a new instance. */
723 o_valuelist = (*jvm_env)->NewObject (jvm_env, c_valuelist,
724 m_valuelist_constructor);
725 if (o_valuelist == NULL)
726 {
727 ERROR ("java plugin: ctoj_value_list: Creating a new ValueList instance "
728 "failed.");
729 return (NULL);
730 }
732 status = ctoj_value_list_add_data_set (jvm_env,
733 c_valuelist, o_valuelist, ds);
734 if (status != 0)
735 {
736 ERROR ("java plugin: ctoj_value_list: "
737 "ctoj_value_list_add_data_set failed.");
738 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
739 return (NULL);
740 }
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); \
746 if (status != 0) { \
747 ERROR ("java plugin: ctoj_value_list: jtoc_string (%s) failed.", \
748 method_name); \
749 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist); \
750 return (NULL); \
751 } } while (0)
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");
759 #undef SET_STRING
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");
764 if (status != 0)
765 {
766 ERROR ("java plugin: ctoj_value_list: ctoj_long (setTime) failed.");
767 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
768 return (NULL);
769 }
771 /* Set the `interval' member.. */
772 status = ctoj_long (jvm_env, (jlong) vl->interval,
773 c_valuelist, o_valuelist, "setInterval");
774 if (status != 0)
775 {
776 ERROR ("java plugin: ctoj_value_list: ctoj_long (setInterval) failed.");
777 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
778 return (NULL);
779 }
781 for (i = 0; i < vl->values_len; i++)
782 {
783 status = ctoj_value_list_add_value (jvm_env, vl->values[i], ds->ds[i].type,
784 c_valuelist, o_valuelist);
785 if (status != 0)
786 {
787 ERROR ("java plugin: ctoj_value_list: "
788 "ctoj_value_list_add_value failed.");
789 (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
790 return (NULL);
791 }
792 }
794 return (o_valuelist);
795 } /* }}} int ctoj_value_list */
797 /*
798 * Java to C conversion functions
799 */
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)
803 {
804 jmethodID method_id;
805 jobject string_obj;
806 const char *c_str;
808 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
809 method_name, "()Ljava/lang/String;");
810 if (method_id == NULL)
811 {
812 ERROR ("java plugin: jtoc_string: Cannot find method `String %s ()'.",
813 method_name);
814 return (-1);
815 }
817 string_obj = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, method_id);
818 if (string_obj == NULL)
819 {
820 ERROR ("java plugin: jtoc_string: CallObjectMethod (%s) failed.",
821 method_name);
822 return (-1);
823 }
825 c_str = (*jvm_env)->GetStringUTFChars (jvm_env, string_obj, 0);
826 if (c_str == NULL)
827 {
828 ERROR ("java plugin: jtoc_string: GetStringUTFChars failed.");
829 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
830 return (-1);
831 }
833 DEBUG ("java plugin: jtoc_string: ->%s() = %s", method_name, c_str);
835 sstrncpy (buffer, c_str, buffer_size);
837 (*jvm_env)->ReleaseStringUTFChars (jvm_env, string_obj, c_str);
838 (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
840 return (0);
841 } /* }}} int jtoc_string */
843 static int jtoc_long (JNIEnv *jvm_env, /* {{{ */
844 jlong *ret_value,
845 jclass class_ptr, jobject object_ptr, const char *method_name)
846 {
847 jmethodID method_id;
849 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
850 method_name, "()J");
851 if (method_id == NULL)
852 {
853 ERROR ("java plugin: jtoc_long: Cannot find method `long %s ()'.",
854 method_name);
855 return (-1);
856 }
858 *ret_value = (*jvm_env)->CallLongMethod (jvm_env, object_ptr, method_id);
860 DEBUG ("java plugin: jtoc_long: ->%s() = %li",
861 method_name, (long int) *ret_value);
863 return (0);
864 } /* }}} int jtoc_long */
866 static int jtoc_double (JNIEnv *jvm_env, /* {{{ */
867 jdouble *ret_value,
868 jclass class_ptr, jobject object_ptr, const char *method_name)
869 {
870 jmethodID method_id;
872 method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
873 method_name, "()D");
874 if (method_id == NULL)
875 {
876 ERROR ("java plugin: jtoc_string: Cannot find method `double %s ()'.",
877 method_name);
878 return (-1);
879 }
881 *ret_value = (*jvm_env)->CallDoubleMethod (jvm_env, object_ptr, method_id);
883 DEBUG ("java plugin: jtoc_double: ->%s() = %g",
884 method_name, (double) *ret_value);
886 return (0);
887 } /* }}} int jtoc_double */
889 static int jtoc_value (JNIEnv *jvm_env, /* {{{ */
890 value_t *ret_value, int ds_type, jobject object_ptr)
891 {
892 jclass class_ptr;
893 int status;
895 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
897 if (ds_type == DS_TYPE_COUNTER)
898 {
899 jlong tmp_long;
901 status = jtoc_long (jvm_env, &tmp_long,
902 class_ptr, object_ptr, "longValue");
903 if (status != 0)
904 {
905 ERROR ("java plugin: jtoc_value: "
906 "jtoc_long failed.");
907 return (-1);
908 }
909 (*ret_value).counter = (counter_t) tmp_long;
910 }
911 else
912 {
913 jdouble tmp_double;
915 status = jtoc_double (jvm_env, &tmp_double,
916 class_ptr, object_ptr, "doubleValue");
917 if (status != 0)
918 {
919 ERROR ("java plugin: jtoc_value: "
920 "jtoc_double failed.");
921 return (-1);
922 }
923 (*ret_value).gauge = (gauge_t) tmp_double;
924 }
926 return (0);
927 } /* }}} int jtoc_value */
929 static int jtoc_values_array (JNIEnv *jvm_env, /* {{{ */
930 const data_set_t *ds, value_list_t *vl,
931 jclass class_ptr, jobject object_ptr)
932 {
933 jmethodID m_getvalues;
934 jmethodID m_toarray;
935 jobject o_list;
936 jobjectArray o_number_array;
938 value_t *values;
939 int values_num;
940 int i;
942 values_num = ds->ds_num;
944 values = NULL;
945 o_number_array = NULL;
946 o_list = NULL;
948 #define BAIL_OUT(status) \
949 free (values); \
950 if (o_number_array != NULL) \
951 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array); \
952 if (o_list != NULL) \
953 (*jvm_env)->DeleteLocalRef (jvm_env, o_list); \
954 return (status);
956 /* Call: List<Number> ValueList.getValues () */
957 m_getvalues = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
958 "getValues", "()Ljava/util/List;");
959 if (m_getvalues == NULL)
960 {
961 ERROR ("java plugin: jtoc_values_array: "
962 "Cannot find method `List getValues ()'.");
963 BAIL_OUT (-1);
964 }
966 o_list = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, m_getvalues);
967 if (o_list == NULL)
968 {
969 ERROR ("java plugin: jtoc_values_array: "
970 "CallObjectMethod (getValues) failed.");
971 BAIL_OUT (-1);
972 }
974 /* Call: Number[] List.toArray () */
975 m_toarray = (*jvm_env)->GetMethodID (jvm_env,
976 (*jvm_env)->GetObjectClass (jvm_env, o_list),
977 "toArray", "()[Ljava/lang/Object;");
978 if (m_toarray == NULL)
979 {
980 ERROR ("java plugin: jtoc_values_array: "
981 "Cannot find method `Object[] toArray ()'.");
982 BAIL_OUT (-1);
983 }
985 o_number_array = (*jvm_env)->CallObjectMethod (jvm_env, o_list, m_toarray);
986 if (o_number_array == NULL)
987 {
988 ERROR ("java plugin: jtoc_values_array: "
989 "CallObjectMethod (toArray) failed.");
990 BAIL_OUT (-1);
991 }
993 values = calloc (values_num, sizeof (value_t));
994 if (values == NULL)
995 {
996 ERROR ("java plugin: jtoc_values_array: calloc failed.");
997 BAIL_OUT (-1);
998 }
1000 for (i = 0; i < values_num; i++)
1001 {
1002 jobject o_number;
1003 int status;
1005 o_number = (*jvm_env)->GetObjectArrayElement (jvm_env,
1006 o_number_array, (jsize) i);
1007 if (o_number == NULL)
1008 {
1009 ERROR ("java plugin: jtoc_values_array: "
1010 "GetObjectArrayElement (%i) failed.", i);
1011 BAIL_OUT (-1);
1012 }
1014 status = jtoc_value (jvm_env, values + i, ds->ds[i].type, o_number);
1015 if (status != 0)
1016 {
1017 ERROR ("java plugin: jtoc_values_array: "
1018 "jtoc_value (%i) failed.", i);
1019 BAIL_OUT (-1);
1020 }
1021 } /* for (i = 0; i < values_num; i++) */
1023 vl->values = values;
1024 vl->values_len = values_num;
1026 #undef BAIL_OUT
1027 (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array);
1028 (*jvm_env)->DeleteLocalRef (jvm_env, o_list);
1029 return (0);
1030 } /* }}} int jtoc_values_array */
1032 /* Convert a org.collectd.protocol.ValueList to a value_list_t. */
1033 static int jtoc_value_list (JNIEnv *jvm_env, value_list_t *vl, /* {{{ */
1034 jobject object_ptr)
1035 {
1036 jclass class_ptr;
1037 int status;
1038 jlong tmp_long;
1039 const data_set_t *ds;
1041 class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
1042 if (class_ptr == NULL)
1043 {
1044 ERROR ("java plugin: jtoc_value_list: GetObjectClass failed.");
1045 return (-1);
1046 }
1048 #define SET_STRING(buffer,method) do { \
1049 status = jtoc_string (jvm_env, buffer, sizeof (buffer), \
1050 class_ptr, object_ptr, method); \
1051 if (status != 0) { \
1052 ERROR ("java plugin: jtoc_value_list: jtoc_string (%s) failed.", \
1053 method); \
1054 return (-1); \
1055 } } while (0)
1057 SET_STRING(vl->type, "getType");
1059 ds = plugin_get_ds (vl->type);
1060 if (ds == NULL)
1061 {
1062 ERROR ("java plugin: jtoc_value_list: Data-set `%s' is not defined. "
1063 "Please consult the types.db(5) manpage for mor information.",
1064 vl->type);
1065 return (-1);
1066 }
1068 SET_STRING(vl->host, "getHost");
1069 SET_STRING(vl->plugin, "getPlugin");
1070 SET_STRING(vl->plugin_instance, "getPluginInstance");
1071 SET_STRING(vl->type_instance, "getTypeInstance");
1073 #undef SET_STRING
1075 status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
1076 if (status != 0)
1077 {
1078 ERROR ("java plugin: jtoc_value_list: jtoc_long (getTime) failed.");
1079 return (-1);
1080 }
1081 /* Java measures time in milliseconds. */
1082 vl->time = (time_t) (tmp_long / ((jlong) 1000));
1084 status = jtoc_long (jvm_env, &tmp_long,
1085 class_ptr, object_ptr, "getInterval");
1086 if (status != 0)
1087 {
1088 ERROR ("java plugin: jtoc_value_list: jtoc_long (getInterval) failed.");
1089 return (-1);
1090 }
1091 vl->interval = (int) tmp_long;
1093 status = jtoc_values_array (jvm_env, ds, vl, class_ptr, object_ptr);
1094 if (status != 0)
1095 {
1096 ERROR ("java plugin: jtoc_value_list: jtoc_values_array failed.");
1097 return (-1);
1098 }
1100 return (0);
1101 } /* }}} int jtoc_value_list */
1103 /*
1104 * Functions accessible from Java
1105 */
1106 static jint JNICALL cjni_api_dispatch_values (JNIEnv *jvm_env, /* {{{ */
1107 jobject this, jobject java_vl)
1108 {
1109 value_list_t vl = VALUE_LIST_INIT;
1110 int status;
1112 DEBUG ("cjni_api_dispatch_values: java_vl = %p;", (void *) java_vl);
1114 status = jtoc_value_list (jvm_env, &vl, java_vl);
1115 if (status != 0)
1116 {
1117 ERROR ("java plugin: cjni_api_dispatch_values: jtoc_value_list failed.");
1118 return (-1);
1119 }
1121 status = plugin_dispatch_values (&vl);
1123 sfree (vl.values);
1125 return (status);
1126 } /* }}} jint cjni_api_dispatch_values */
1128 static jobject JNICALL cjni_api_get_ds (JNIEnv *jvm_env, /* {{{ */
1129 jobject this, jobject o_string_type)
1130 {
1131 const char *ds_name;
1132 const data_set_t *ds;
1133 jobject o_dataset;
1135 ds_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_string_type, 0);
1136 if (ds_name == NULL)
1137 {
1138 ERROR ("java plugin: cjni_api_get_ds: GetStringUTFChars failed.");
1139 return (NULL);
1140 }
1142 ds = plugin_get_ds (ds_name);
1143 DEBUG ("java plugin: cjni_api_get_ds: "
1144 "plugin_get_ds (%s) = %p;", ds_name, (void *) ds);
1146 (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_string_type, ds_name);
1148 if (ds == NULL)
1149 return (NULL);
1151 o_dataset = ctoj_data_set (jvm_env, ds);
1152 return (o_dataset);
1153 } /* }}} jint cjni_api_get_ds */
1155 static JNINativeMethod jni_api_functions[] =
1156 {
1157 { "DispatchValues", "(Lorg/collectd/protocol/ValueList;)I", cjni_api_dispatch_values },
1158 { "GetDS", "(Ljava/lang/String;)Ljava/util/List;", cjni_api_get_ds }
1159 };
1160 static size_t jni_api_functions_num = sizeof (jni_api_functions)
1161 / sizeof (jni_api_functions[0]);
1163 /*
1164 * Functions
1165 */
1166 static int cjni_config_add_jvm_arg (oconfig_item_t *ci) /* {{{ */
1167 {
1168 char **tmp;
1170 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1171 {
1172 WARNING ("java plugin: `JVMArg' needs exactly one string argument.");
1173 return (-1);
1174 }
1176 tmp = (char **) realloc (jvm_argv, sizeof (char *) * (jvm_argc + 1));
1177 if (tmp == NULL)
1178 {
1179 ERROR ("java plugin: realloc failed.");
1180 return (-1);
1181 }
1182 jvm_argv = tmp;
1184 jvm_argv[jvm_argc] = strdup (ci->values[0].value.string);
1185 if (jvm_argv[jvm_argc] == NULL)
1186 {
1187 ERROR ("java plugin: strdup failed.");
1188 return (-1);
1189 }
1190 jvm_argc++;
1192 return (0);
1193 } /* }}} int cjni_config_add_jvm_arg */
1195 static int cjni_config_load_plugin (oconfig_item_t *ci) /* {{{ */
1196 {
1197 java_plugin_t *jp;
1199 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1200 {
1201 WARNING ("java plugin: `LoadPlugin' needs exactly one string argument.");
1202 return (-1);
1203 }
1205 jp = (java_plugin_t *) realloc (java_plugins,
1206 sizeof (*java_plugins) * (java_plugins_num + 1));
1207 if (jp == NULL)
1208 {
1209 ERROR ("java plugin: realloc failed.");
1210 return (-1);
1211 }
1212 java_plugins = jp;
1213 jp = java_plugins + java_plugins_num;
1215 memset (jp, 0, sizeof (*jp));
1216 jp->class_name = strdup (ci->values[0].value.string);
1217 if (jp->class_name == NULL)
1218 {
1219 ERROR ("java plugin: strdup failed.");
1220 return (-1);
1221 }
1223 jp->class_ptr = NULL;
1224 jp->object_ptr = NULL;
1225 jp->ci = NULL;
1226 jp->flags = 0;
1227 jp->m_config = NULL;
1228 jp->m_init = NULL;
1229 jp->m_read = NULL;
1230 jp->m_write = NULL;
1231 jp->m_shutdown = NULL;
1233 java_plugins_num++;
1235 return (0);
1236 } /* }}} int cjni_config_load_plugin */
1238 static int cjni_config_plugin_block (oconfig_item_t *ci) /* {{{ */
1239 {
1240 size_t i;
1241 const char *class_name;
1243 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
1244 {
1245 WARNING ("java plugin: `Plugin' blocks "
1246 "need exactly one string argument.");
1247 return (-1);
1248 }
1250 class_name = ci->values[0].value.string;
1251 for (i = 0; i < java_plugins_num; i++)
1252 if (strcmp (java_plugins[i].class_name, class_name) == 0)
1253 break;
1255 if (i >= java_plugins_num)
1256 {
1257 WARNING ("java plugin: Configuration block for the `%s' plugin found, "
1258 "but the plugin has not been loaded. Please note, that the class "
1259 "name is case-sensitive!",
1260 class_name);
1261 return (0);
1262 }
1264 if (java_plugins[i].ci != NULL)
1265 {
1266 WARNING ("java plugin: There are more than one <Plugin> blocks for the "
1267 "`%s' plugin. This is currently not supported - only the first block "
1268 "will be used!",
1269 class_name);
1270 return (0);
1271 }
1273 java_plugins[i].ci = oconfig_clone (ci);
1274 if (java_plugins[i].ci == NULL)
1275 {
1276 ERROR ("java plugin: cjni_config_plugin_block: "
1277 "oconfig_clone failed for `%s'.",
1278 class_name);
1279 return (-1);
1280 }
1282 DEBUG ("java plugin: cjni_config_plugin_block: "
1283 "Successfully copied config for `%s'.",
1284 class_name);
1286 return (0);
1287 } /* }}} int cjni_config_plugin_block */
1289 static int cjni_config (oconfig_item_t *ci) /* {{{ */
1290 {
1291 int success;
1292 int errors;
1293 int status;
1294 int i;
1296 success = 0;
1297 errors = 0;
1299 for (i = 0; i < ci->children_num; i++)
1300 {
1301 oconfig_item_t *child = ci->children + i;
1303 if (strcasecmp ("JVMArg", child->key) == 0)
1304 {
1305 status = cjni_config_add_jvm_arg (child);
1306 if (status == 0)
1307 success++;
1308 else
1309 errors++;
1310 }
1311 else if (strcasecmp ("LoadPlugin", child->key) == 0)
1312 {
1313 status = cjni_config_load_plugin (child);
1314 if (status == 0)
1315 success++;
1316 else
1317 errors++;
1318 }
1319 else if (strcasecmp ("Plugin", child->key) == 0)
1320 {
1321 status = cjni_config_plugin_block (child);
1322 if (status == 0)
1323 success++;
1324 else
1325 errors++;
1326 }
1327 else
1328 {
1329 WARNING ("java plugin: Option `%s' not allowed here.", child->key);
1330 errors++;
1331 }
1332 }
1334 if ((success == 0) && (errors > 0))
1335 {
1336 ERROR ("java plugin: All statements failed.");
1337 return (-1);
1338 }
1340 return (0);
1341 } /* }}} int cjni_config */
1343 static int cjni_init_one_plugin (JNIEnv *jvm_env, java_plugin_t *jp) /* {{{ */
1344 {
1345 jmethodID constructor_id;
1346 int status;
1348 jp->class_ptr = (*jvm_env)->FindClass (jvm_env, jp->class_name);
1349 if (jp->class_ptr == NULL)
1350 {
1351 ERROR ("cjni_init_one_plugin: FindClass (%s) failed.",
1352 jp->class_name);
1353 return (-1);
1354 }
1356 constructor_id = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1357 "<init>", "()V");
1358 if (constructor_id == NULL)
1359 {
1360 ERROR ("cjni_init_one_plugin: Could not find the constructor for `%s'.",
1361 jp->class_name);
1362 return (-1);
1363 }
1365 jp->object_ptr = (*jvm_env)->NewObject (jvm_env, jp->class_ptr,
1366 constructor_id);
1367 if (jp->object_ptr == NULL)
1368 {
1369 ERROR ("cjni_init_one_plugin: Could create a new `%s' object.",
1370 jp->class_name);
1371 return (-1);
1372 }
1374 jp->m_config = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1375 "Config", "(Lorg/collectd/api/OConfigItem;)I");
1376 DEBUG ("java plugin: cjni_init_one_plugin: "
1377 "jp->class_name = %s; jp->m_config = %p;",
1378 jp->class_name, (void *) jp->m_config);
1380 jp->m_init = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1381 "Init", "()I");
1382 DEBUG ("java plugin: cjni_init_one_plugin: "
1383 "jp->class_name = %s; jp->m_init = %p;",
1384 jp->class_name, (void *) jp->m_init);
1386 jp->m_read = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1387 "Read", "()I");
1388 DEBUG ("java plugin: cjni_init_one_plugin: "
1389 "jp->class_name = %s; jp->m_read = %p;",
1390 jp->class_name, (void *) jp->m_read);
1392 jp->m_write = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1393 "Write", "(Lorg/collectd/protocol/ValueList;)I");
1394 DEBUG ("java plugin: cjni_init_one_plugin: "
1395 "jp->class_name = %s; jp->m_write = %p;",
1396 jp->class_name, (void *) jp->m_write);
1398 jp->m_shutdown = (*jvm_env)->GetMethodID (jvm_env, jp->class_ptr,
1399 "Shutdown", "()I");
1400 DEBUG ("java plugin: cjni_init_one_plugin: "
1401 "jp->class_name = %s; jp->m_shutdown = %p;",
1402 jp->class_name, (void *) jp->m_shutdown);
1404 if (jp->ci != NULL)
1405 {
1406 if (jp->m_config == NULL)
1407 {
1408 WARNING ("java plugin: Configuration for the `%s' plugin is present, "
1409 "but plugin doesn't provide a configuration method.",
1410 jp->class_name);
1411 }
1412 else /* if (jp->m_config != NULL) */
1413 {
1414 jobject o_ocitem;
1416 o_ocitem = ctoj_oconfig_item (jvm_env, jp->ci);
1417 if (o_ocitem == NULL)
1418 {
1419 ERROR ("java plugin: Creating an OConfigItem object failed. "
1420 "Can't pass configuration information to the `%s' plugin!",
1421 jp->class_name);
1422 }
1423 else /* if (o_ocitem != NULL) */
1424 {
1425 status = (*jvm_env)->CallIntMethod (jvm_env,
1426 jp->object_ptr, jp->m_config, o_ocitem);
1427 if (status != 0)
1428 {
1429 ERROR ("java plugin: cjni_init_one_plugin: "
1430 "Configuring the `%s' object failed with status %i.",
1431 jp->class_name, status);
1432 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
1433 return (-1);
1434 }
1435 (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
1436 } /* if (o_ocitem != NULL) */
1437 } /* if (jp->m_config != NULL) */
1438 } /* if (jp->ci != NULL) */
1440 if (jp->m_init != NULL)
1441 {
1442 status = (*jvm_env)->CallIntMethod (jvm_env, jp->object_ptr,
1443 jp->m_init);
1444 if (status != 0)
1445 {
1446 ERROR ("java plugin: cjni_init_one_plugin: "
1447 "Initializing `%s' object failed with status %i.",
1448 jp->class_name, status);
1449 return (-1);
1450 }
1451 }
1452 jp->flags |= CJNI_FLAG_ENABLED;
1454 return (0);
1455 } /* }}} int cjni_init_one_plugin */
1457 static int cjni_init_plugins (JNIEnv *jvm_env) /* {{{ */
1458 {
1459 size_t j;
1461 for (j = 0; j < java_plugins_num; j++)
1462 cjni_init_one_plugin (jvm_env, &java_plugins[j]);
1464 return (0);
1465 } /* }}} int cjni_init_plugins */
1467 static int cjni_init_native (JNIEnv *jvm_env) /* {{{ */
1468 {
1469 jclass api_class_ptr;
1470 int status;
1472 api_class_ptr = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.CollectdAPI");
1473 if (api_class_ptr == NULL)
1474 {
1475 ERROR ("cjni_init_native: Cannot find API class `org.collectd.api.CollectdAPI'.");
1476 return (-1);
1477 }
1479 status = (*jvm_env)->RegisterNatives (jvm_env, api_class_ptr,
1480 jni_api_functions, (jint) jni_api_functions_num);
1481 if (status != 0)
1482 {
1483 ERROR ("cjni_init_native: RegisterNatives failed with status %i.", status);
1484 return (-1);
1485 }
1487 return (0);
1488 } /* }}} int cjni_init_native */
1490 static int cjni_init (void) /* {{{ */
1491 {
1492 JNIEnv *jvm_env;
1493 JavaVMInitArgs vm_args;
1494 JavaVMOption vm_options[jvm_argc];
1496 int status;
1497 size_t i;
1499 if (jvm != NULL)
1500 return (0);
1502 jvm_env = NULL;
1504 memset (&vm_args, 0, sizeof (vm_args));
1505 vm_args.version = JNI_VERSION_1_2;
1506 vm_args.options = vm_options;
1507 vm_args.nOptions = (jint) jvm_argc;
1509 for (i = 0; i < jvm_argc; i++)
1510 {
1511 DEBUG ("java plugin: cjni_init: jvm_argv[%zu] = %s", i, jvm_argv[i]);
1512 vm_args.options[i].optionString = jvm_argv[i];
1513 }
1514 /*
1515 vm_args.options[0].optionString = "-verbose:jni";
1516 vm_args.options[1].optionString = "-Djava.class.path=/home/octo/collectd/bindings/java";
1517 */
1519 status = JNI_CreateJavaVM (&jvm, (void **) &jvm_env, (void **) &vm_args);
1520 if (status != 0)
1521 {
1522 ERROR ("cjni_init: JNI_CreateJavaVM failed with status %i.",
1523 status);
1524 return (-1);
1525 }
1526 assert (jvm != NULL);
1527 assert (jvm_env != NULL);
1529 /* Call RegisterNatives */
1530 status = cjni_init_native (jvm_env);
1531 if (status != 0)
1532 {
1533 ERROR ("cjni_init: cjni_init_native failed.");
1534 return (-1);
1535 }
1537 cjni_init_plugins (jvm_env);
1539 return (0);
1540 } /* }}} int cjni_init */
1542 static int cjni_read_one_plugin (JNIEnv *jvm_env, java_plugin_t *jp) /* {{{ */
1543 {
1544 int status;
1546 if ((jp == NULL)
1547 || ((jp->flags & CJNI_FLAG_ENABLED) == 0)
1548 || (jp->m_read == NULL))
1549 return (0);
1551 DEBUG ("java plugin: Calling: %s.Read()", jp->class_name);
1553 status = (*jvm_env)->CallIntMethod (jvm_env, jp->object_ptr,
1554 jp->m_read);
1555 if (status != 0)
1556 {
1557 ERROR ("java plugin: cjni_read_one_plugin: "
1558 "Calling `Read' on an `%s' object failed with status %i.",
1559 jp->class_name, status);
1560 return (-1);
1561 }
1563 return (0);
1564 } /* }}} int cjni_read_one_plugin */
1566 static int cjni_read_plugins (JNIEnv *jvm_env) /* {{{ */
1567 {
1568 size_t j;
1570 for (j = 0; j < java_plugins_num; j++)
1571 cjni_read_one_plugin (jvm_env, &java_plugins[j]);
1573 return (0);
1574 } /* }}} int cjni_read_plugins */
1576 static int cjni_read (void) /* {{{ */
1577 {
1578 JNIEnv *jvm_env;
1579 JavaVMAttachArgs args;
1580 int status;
1582 if (jvm == NULL)
1583 {
1584 ERROR ("java plugin: cjni_read: jvm == NULL");
1585 return (-1);
1586 }
1588 jvm_env = NULL;
1589 memset (&args, 0, sizeof (args));
1590 args.version = JNI_VERSION_1_2;
1592 status = (*jvm)->AttachCurrentThread (jvm, (void **) &jvm_env, &args);
1593 if (status != 0)
1594 {
1595 ERROR ("java plugin: cjni_read: AttachCurrentThread failed with status %i.",
1596 status);
1597 return (-1);
1598 }
1600 cjni_read_plugins (jvm_env);
1602 status = (*jvm)->DetachCurrentThread (jvm);
1603 if (status != 0)
1604 {
1605 ERROR ("java plugin: cjni_read: DetachCurrentThread failed with status %i.",
1606 status);
1607 return (-1);
1608 }
1610 return (0);
1611 } /* }}} int cjni_read */
1613 static int cjni_write_one_plugin (JNIEnv *jvm_env, /* {{{ */
1614 java_plugin_t *jp, jobject vl_java)
1615 {
1616 int status;
1618 if ((jp == NULL)
1619 || ((jp->flags & CJNI_FLAG_ENABLED) == 0)
1620 || (jp->m_write == NULL))
1621 return (0);
1623 DEBUG ("java plugin: Calling: %s.Write(ValueList)", jp->class_name);
1625 status = (*jvm_env)->CallIntMethod (jvm_env, jp->object_ptr,
1626 jp->m_write, vl_java);
1627 if (status != 0)
1628 {
1629 ERROR ("java plugin: cjni_write_one_plugin: "
1630 "Calling `Write' on an `%s' object failed with status %i.",
1631 jp->class_name, status);
1632 return (-1);
1633 }
1635 return (0);
1636 } /* }}} int cjni_write_one_plugin */
1638 static int cjni_write_plugins (JNIEnv *jvm_env, /* {{{ */
1639 const data_set_t *ds, const value_list_t *vl)
1640 {
1641 size_t j;
1643 jobject vl_java;
1645 vl_java = ctoj_value_list (jvm_env, ds, vl);
1646 if (vl_java == NULL)
1647 {
1648 ERROR ("java plugin: cjni_write_plugins: ctoj_value_list failed.");
1649 return (-1);
1650 }
1652 for (j = 0; j < java_plugins_num; j++)
1653 cjni_write_one_plugin (jvm_env, &java_plugins[j], vl_java);
1655 (*jvm_env)->DeleteLocalRef (jvm_env, vl_java);
1657 return (0);
1658 } /* }}} int cjni_write_plugins */
1660 static int cjni_write (const data_set_t *ds, const value_list_t *vl) /* {{{ */
1661 {
1662 JNIEnv *jvm_env;
1663 JavaVMAttachArgs args;
1664 int status;
1666 if (jvm == NULL)
1667 {
1668 ERROR ("java plugin: cjni_write: jvm == NULL");
1669 return (-1);
1670 }
1672 jvm_env = NULL;
1673 memset (&args, 0, sizeof (args));
1674 args.version = JNI_VERSION_1_2;
1676 status = (*jvm)->AttachCurrentThread (jvm, (void **) &jvm_env, &args);
1677 if (status != 0)
1678 {
1679 ERROR ("java plugin: cjni_write: AttachCurrentThread failed with status %i.",
1680 status);
1681 return (-1);
1682 }
1684 cjni_write_plugins (jvm_env, ds, vl);
1686 status = (*jvm)->DetachCurrentThread (jvm);
1687 if (status != 0)
1688 {
1689 ERROR ("java plugin: cjni_write: DetachCurrentThread failed with status %i.",
1690 status);
1691 return (-1);
1692 }
1694 return (0);
1695 } /* }}} int cjni_write */
1697 static int cjni_shutdown_one_plugin (JNIEnv *jvm_env, /* {{{ */
1698 java_plugin_t *jp)
1699 {
1700 int status;
1702 if ((jp == NULL)
1703 || ((jp->flags & CJNI_FLAG_ENABLED) == 0)
1704 || (jp->m_shutdown == NULL))
1705 return (0);
1707 status = (*jvm_env)->CallIntMethod (jvm_env, jp->object_ptr,
1708 jp->m_shutdown);
1709 if (status != 0)
1710 {
1711 ERROR ("cjni_shutdown_one_plugin: Destroying an `%s' object failed "
1712 "with status %i.", jp->class_name, status);
1713 return (-1);
1714 }
1715 jp->flags &= ~CJNI_FLAG_ENABLED;
1717 return (0);
1718 } /* }}} int cjni_shutdown_one_plugin */
1720 static int cjni_shutdown_plugins (JNIEnv *jvm_env) /* {{{ */
1721 {
1722 size_t j;
1724 for (j = 0; j < java_plugins_num; j++)
1725 cjni_shutdown_one_plugin (jvm_env, &java_plugins[j]);
1727 return (0);
1728 } /* }}} int cjni_shutdown_plugins */
1730 static int cjni_shutdown (void) /* {{{ */
1731 {
1732 JNIEnv *jvm_env;
1733 JavaVMAttachArgs args;
1734 int status;
1735 size_t i;
1737 if (jvm == NULL)
1738 return (0);
1740 jvm_env = NULL;
1741 memset (&args, 0, sizeof (args));
1742 args.version = JNI_VERSION_1_2;
1744 status = (*jvm)->AttachCurrentThread (jvm, (void **) &jvm_env, &args);
1745 if (status != 0)
1746 {
1747 ERROR ("java plugin: cjni_read: AttachCurrentThread failed with status %i.",
1748 status);
1749 return (-1);
1750 }
1752 cjni_shutdown_plugins (jvm_env);
1754 (*jvm)->DestroyJavaVM (jvm);
1755 jvm = NULL;
1756 jvm_env = NULL;
1758 for (i = 0; i < jvm_argc; i++)
1759 {
1760 sfree (jvm_argv[i]);
1761 }
1762 sfree (jvm_argv);
1763 jvm_argc = 0;
1765 for (i = 0; i < java_plugins_num; i++)
1766 {
1767 sfree (java_plugins[i].class_name);
1768 oconfig_free (java_plugins[i].ci);
1769 }
1770 sfree (java_plugins);
1771 java_plugins_num = 0;
1773 return (0);
1774 } /* }}} int cjni_shutdown */
1776 void module_register (void)
1777 {
1778 plugin_register_complex_config ("java", cjni_config);
1779 plugin_register_init ("java", cjni_init);
1780 plugin_register_read ("java", cjni_read);
1781 plugin_register_write ("java", cjni_write);
1782 plugin_register_shutdown ("java", cjni_shutdown);
1783 } /* void module_register (void) */
1785 /* vim: set sw=2 sts=2 et fdm=marker : */