--- /dev/null
+/**
+ * collectd - src/java.c
+ * Copyright (C) 2009 Florian octo Forster
+ * Copyright (C) 2008 Justo Alonso Achaques
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * Florian octo Forster <octo at verplant.org>
+ * Justo Alonso Achaques <justo.alonso at gmail.com>
+ **/
+
+#include "collectd.h"
+#include "plugin.h"
+#include "common.h"
+
+#include <pthread.h>
+#include <jni.h>
+
+#if !defined(JNI_VERSION_1_2)
+# error "Need JNI 1.2 compatible interface!"
+#endif
+
+/*
+ * Types
+ */
+struct cjni_jvm_env_s /* {{{ */
+{
+ JNIEnv *jvm_env;
+ int reference_counter;
+};
+typedef struct cjni_jvm_env_s cjni_jvm_env_t;
+/* }}} */
+
+struct java_plugin_class_s /* {{{ */
+{
+ char *name;
+ jclass class;
+ jobject object;
+};
+typedef struct java_plugin_class_s java_plugin_class_t;
+/* }}} */
+
+struct java_plugin_config_s /* {{{ */
+{
+ char *name;
+ oconfig_item_t *ci;
+};
+typedef struct java_plugin_config_s java_plugin_config_t;
+/* }}} */
+
+#define CB_TYPE_CONFIG 1
+#define CB_TYPE_INIT 2
+#define CB_TYPE_READ 3
+#define CB_TYPE_WRITE 4
+#define CB_TYPE_SHUTDOWN 5
+struct cjni_callback_info_s /* {{{ */
+{
+ char *name;
+ int type;
+ jclass class;
+ jobject object;
+ jmethodID method;
+};
+typedef struct cjni_callback_info_s cjni_callback_info_t;
+/* }}} */
+
+/*
+ * Global variables
+ */
+static JavaVM *jvm = NULL;
+static pthread_key_t jvm_env_key;
+
+/* Configuration options for the JVM. */
+static char **jvm_argv = NULL;
+static size_t jvm_argc = 0;
+
+/* List of class names to load */
+static java_plugin_class_t *java_classes_list = NULL;
+static size_t java_classes_list_len;
+
+/* List of `config_item_t's for Java plugins */
+static java_plugin_config_t *java_plugin_configs = NULL;
+static size_t java_plugin_configs_num = 0;
+
+/* List of config, init, and shutdown callbacks. */
+static cjni_callback_info_t *java_callbacks = NULL;
+static size_t java_callbacks_num = 0;
+static pthread_mutex_t java_callbacks_lock = PTHREAD_MUTEX_INITIALIZER;
+
+/*
+ * Prototypes
+ *
+ * Mostly functions that are needed by the Java interface (``native'')
+ * functions.
+ */
+static void cjni_callback_info_destroy (void *arg);
+static cjni_callback_info_t *cjni_callback_info_create (JNIEnv *jvm_env,
+ jobject o_name, jobject o_callback, int type);
+static int cjni_callback_register (JNIEnv *jvm_env, jobject o_name,
+ jobject o_callback, int type);
+static int cjni_read (user_data_t *user_data);
+static int cjni_write (const data_set_t *ds, const value_list_t *vl,
+ user_data_t *ud);
+
+/*
+ * C to Java conversion functions
+ */
+static int ctoj_string (JNIEnv *jvm_env, /* {{{ */
+ const char *string,
+ jclass class_ptr, jobject object_ptr, const char *method_name)
+{
+ jmethodID m_set;
+ jstring o_string;
+
+ /* Create a java.lang.String */
+ o_string = (*jvm_env)->NewStringUTF (jvm_env,
+ (string != NULL) ? string : "");
+ if (o_string == NULL)
+ {
+ ERROR ("java plugin: ctoj_string: NewStringUTF failed.");
+ return (-1);
+ }
+
+ /* Search for the `void setFoo (String s)' method. */
+ m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
+ method_name, "(Ljava/lang/String;)V");
+ if (m_set == NULL)
+ {
+ ERROR ("java plugin: ctoj_string: Cannot find method `void %s (String)'.",
+ method_name);
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
+ return (-1);
+ }
+
+ /* Call the method. */
+ (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, o_string);
+
+ /* Decrease reference counter on the java.lang.String object. */
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_string);
+
+ return (0);
+} /* }}} int ctoj_string */
+
+static int ctoj_int (JNIEnv *jvm_env, /* {{{ */
+ jint value,
+ jclass class_ptr, jobject object_ptr, const char *method_name)
+{
+ jmethodID m_set;
+
+ /* Search for the `void setFoo (int i)' method. */
+ m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
+ method_name, "(I)V");
+ if (m_set == NULL)
+ {
+ ERROR ("java plugin: ctoj_int: Cannot find method `void %s (int)'.",
+ method_name);
+ return (-1);
+ }
+
+ (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
+
+ return (0);
+} /* }}} int ctoj_int */
+
+static int ctoj_long (JNIEnv *jvm_env, /* {{{ */
+ jlong value,
+ jclass class_ptr, jobject object_ptr, const char *method_name)
+{
+ jmethodID m_set;
+
+ /* Search for the `void setFoo (long l)' method. */
+ m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
+ method_name, "(J)V");
+ if (m_set == NULL)
+ {
+ ERROR ("java plugin: ctoj_long: Cannot find method `void %s (long)'.",
+ method_name);
+ return (-1);
+ }
+
+ (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
+
+ return (0);
+} /* }}} int ctoj_long */
+
+static int ctoj_double (JNIEnv *jvm_env, /* {{{ */
+ jdouble value,
+ jclass class_ptr, jobject object_ptr, const char *method_name)
+{
+ jmethodID m_set;
+
+ /* Search for the `void setFoo (double d)' method. */
+ m_set = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
+ method_name, "(D)V");
+ if (m_set == NULL)
+ {
+ ERROR ("java plugin: ctoj_double: Cannot find method `void %s (double)'.",
+ method_name);
+ return (-1);
+ }
+
+ (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_set, value);
+
+ return (0);
+} /* }}} int ctoj_double */
+
+/* Convert a jlong to a java.lang.Number */
+static jobject ctoj_jlong_to_number (JNIEnv *jvm_env, jlong value) /* {{{ */
+{
+ jclass c_long;
+ jmethodID m_long_constructor;
+
+ /* Look up the java.lang.Long class */
+ c_long = (*jvm_env)->FindClass (jvm_env, "java.lang.Long");
+ if (c_long == NULL)
+ {
+ ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
+ "java.lang.Long class failed.");
+ return (NULL);
+ }
+
+ m_long_constructor = (*jvm_env)->GetMethodID (jvm_env,
+ c_long, "<init>", "(J)V");
+ if (m_long_constructor == NULL)
+ {
+ ERROR ("java plugin: ctoj_jlong_to_number: Looking up the "
+ "`Long (long)' constructor failed.");
+ return (NULL);
+ }
+
+ return ((*jvm_env)->NewObject (jvm_env,
+ c_long, m_long_constructor, value));
+} /* }}} jobject ctoj_jlong_to_number */
+
+/* Convert a jdouble to a java.lang.Number */
+static jobject ctoj_jdouble_to_number (JNIEnv *jvm_env, jdouble value) /* {{{ */
+{
+ jclass c_double;
+ jmethodID m_double_constructor;
+
+ /* Look up the java.lang.Long class */
+ c_double = (*jvm_env)->FindClass (jvm_env, "java.lang.Double");
+ if (c_double == NULL)
+ {
+ ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
+ "java.lang.Double class failed.");
+ return (NULL);
+ }
+
+ m_double_constructor = (*jvm_env)->GetMethodID (jvm_env,
+ c_double, "<init>", "(D)V");
+ if (m_double_constructor == NULL)
+ {
+ ERROR ("java plugin: ctoj_jdouble_to_number: Looking up the "
+ "`Double (double)' constructor failed.");
+ return (NULL);
+ }
+
+ return ((*jvm_env)->NewObject (jvm_env,
+ c_double, m_double_constructor, value));
+} /* }}} jobject ctoj_jdouble_to_number */
+
+/* Convert a value_t to a java.lang.Number */
+static jobject ctoj_value_to_number (JNIEnv *jvm_env, /* {{{ */
+ value_t value, int ds_type)
+{
+ if (ds_type == DS_TYPE_COUNTER)
+ return (ctoj_jlong_to_number (jvm_env, (jlong) value.counter));
+ else if (ds_type == DS_TYPE_GAUGE)
+ return (ctoj_jdouble_to_number (jvm_env, (jdouble) value.gauge));
+ else
+ return (NULL);
+} /* }}} jobject ctoj_value_to_number */
+
+/* Convert a data_source_t to a org.collectd.api.DataSource */
+static jobject ctoj_data_source (JNIEnv *jvm_env, /* {{{ */
+ const data_source_t *dsrc)
+{
+ jclass c_datasource;
+ jmethodID m_datasource_constructor;
+ jobject o_datasource;
+ int status;
+
+ /* Look up the DataSource class */
+ c_datasource = (*jvm_env)->FindClass (jvm_env,
+ "org.collectd.api.DataSource");
+ if (c_datasource == NULL)
+ {
+ ERROR ("java plugin: ctoj_data_source: "
+ "FindClass (org.collectd.api.DataSource) failed.");
+ return (NULL);
+ }
+
+ /* Lookup the `ValueList ()' constructor. */
+ m_datasource_constructor = (*jvm_env)->GetMethodID (jvm_env, c_datasource,
+ "<init>", "()V");
+ if (m_datasource_constructor == NULL)
+ {
+ ERROR ("java plugin: ctoj_data_source: Cannot find the "
+ "`DataSource ()' constructor.");
+ return (NULL);
+ }
+
+ /* Create a new instance. */
+ o_datasource = (*jvm_env)->NewObject (jvm_env, c_datasource,
+ m_datasource_constructor);
+ if (o_datasource == NULL)
+ {
+ ERROR ("java plugin: ctoj_data_source: "
+ "Creating a new DataSource instance failed.");
+ return (NULL);
+ }
+
+ /* Set name via `void setName (String name)' */
+ status = ctoj_string (jvm_env, dsrc->name,
+ c_datasource, o_datasource, "setName");
+ if (status != 0)
+ {
+ ERROR ("java plugin: ctoj_data_source: "
+ "ctoj_string (setName) failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
+ return (NULL);
+ }
+
+ /* Set type via `void setType (int type)' */
+ status = ctoj_int (jvm_env, dsrc->type,
+ c_datasource, o_datasource, "setType");
+ if (status != 0)
+ {
+ ERROR ("java plugin: ctoj_data_source: "
+ "ctoj_int (setType) failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
+ return (NULL);
+ }
+
+ /* Set min via `void setMin (double min)' */
+ status = ctoj_double (jvm_env, dsrc->min,
+ c_datasource, o_datasource, "setMin");
+ if (status != 0)
+ {
+ ERROR ("java plugin: ctoj_data_source: "
+ "ctoj_double (setMin) failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
+ return (NULL);
+ }
+
+ /* Set max via `void setMax (double max)' */
+ status = ctoj_double (jvm_env, dsrc->max,
+ c_datasource, o_datasource, "setMax");
+ if (status != 0)
+ {
+ ERROR ("java plugin: ctoj_data_source: "
+ "ctoj_double (setMax) failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
+ return (NULL);
+ }
+
+ return (o_datasource);
+} /* }}} jobject ctoj_data_source */
+
+/* Convert a oconfig_value_t to a org.collectd.api.OConfigValue */
+static jobject ctoj_oconfig_value (JNIEnv *jvm_env, /* {{{ */
+ oconfig_value_t ocvalue)
+{
+ jclass c_ocvalue;
+ jmethodID m_ocvalue_constructor;
+ jobject o_argument;
+ jobject o_ocvalue;
+
+ m_ocvalue_constructor = NULL;
+ o_argument = NULL;
+
+ c_ocvalue = (*jvm_env)->FindClass (jvm_env,
+ "org.collectd.api.OConfigValue");
+ if (c_ocvalue == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_value: "
+ "FindClass (org.collectd.api.OConfigValue) failed.");
+ return (NULL);
+ }
+
+ if (ocvalue.type == OCONFIG_TYPE_BOOLEAN)
+ {
+ jboolean tmp_boolean;
+
+ tmp_boolean = (ocvalue.value.boolean == 0) ? JNI_FALSE : JNI_TRUE;
+
+ m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
+ "<init>", "(Z)V");
+ if (m_ocvalue_constructor == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
+ "`OConfigValue (boolean)' constructor.");
+ return (NULL);
+ }
+
+ return ((*jvm_env)->NewObject (jvm_env,
+ c_ocvalue, m_ocvalue_constructor, tmp_boolean));
+ } /* if (ocvalue.type == OCONFIG_TYPE_BOOLEAN) */
+ else if (ocvalue.type == OCONFIG_TYPE_STRING)
+ {
+ m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
+ "<init>", "(Ljava/lang/String;)V");
+ if (m_ocvalue_constructor == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
+ "`OConfigValue (String)' constructor.");
+ return (NULL);
+ }
+
+ o_argument = (*jvm_env)->NewStringUTF (jvm_env, ocvalue.value.string);
+ if (o_argument == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_value: "
+ "Creating a String object failed.");
+ return (NULL);
+ }
+ }
+ else if (ocvalue.type == OCONFIG_TYPE_NUMBER)
+ {
+ m_ocvalue_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocvalue,
+ "<init>", "(Ljava/lang/Number;)V");
+ if (m_ocvalue_constructor == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_value: Cannot find the "
+ "`OConfigValue (Number)' constructor.");
+ return (NULL);
+ }
+
+ o_argument = ctoj_jdouble_to_number (jvm_env,
+ (jdouble) ocvalue.value.number);
+ if (o_argument == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_value: "
+ "Creating a Number object failed.");
+ return (NULL);
+ }
+ }
+ else
+ {
+ return (NULL);
+ }
+
+ assert (m_ocvalue_constructor != NULL);
+ assert (o_argument != NULL);
+
+ o_ocvalue = (*jvm_env)->NewObject (jvm_env,
+ c_ocvalue, m_ocvalue_constructor, o_argument);
+ if (o_ocvalue == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_value: "
+ "Creating an OConfigValue object failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
+ return (NULL);
+ }
+
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_argument);
+ return (o_ocvalue);
+} /* }}} jobject ctoj_oconfig_value */
+
+/* Convert a oconfig_item_t to a org.collectd.api.OConfigItem */
+static jobject ctoj_oconfig_item (JNIEnv *jvm_env, /* {{{ */
+ const oconfig_item_t *ci)
+{
+ jclass c_ocitem;
+ jmethodID m_ocitem_constructor;
+ jmethodID m_addvalue;
+ jmethodID m_addchild;
+ jobject o_key;
+ jobject o_ocitem;
+ int i;
+
+ c_ocitem = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.OConfigItem");
+ if (c_ocitem == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_item: "
+ "FindClass (org.collectd.api.OConfigItem) failed.");
+ return (NULL);
+ }
+
+ /* Get the required methods: m_ocitem_constructor, m_addvalue, and m_addchild
+ * {{{ */
+ m_ocitem_constructor = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
+ "<init>", "(Ljava/lang/String;)V");
+ if (m_ocitem_constructor == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
+ "`OConfigItem (String)' constructor.");
+ return (NULL);
+ }
+
+ m_addvalue = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
+ "addValue", "(Lorg/collectd/api/OConfigValue;)V");
+ if (m_addvalue == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
+ "`addValue (OConfigValue)' method.");
+ return (NULL);
+ }
+
+ m_addchild = (*jvm_env)->GetMethodID (jvm_env, c_ocitem,
+ "addChild", "(Lorg/collectd/api/OConfigItem;)V");
+ if (m_addchild == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_item: Cannot find the "
+ "`addChild (OConfigItem)' method.");
+ return (NULL);
+ }
+ /* }}} */
+
+ /* Create a String object with the key.
+ * Needed for calling the constructor. */
+ o_key = (*jvm_env)->NewStringUTF (jvm_env, ci->key);
+ if (o_key == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_item: "
+ "Creating String object failed.");
+ return (NULL);
+ }
+
+ /* Create an OConfigItem object */
+ o_ocitem = (*jvm_env)->NewObject (jvm_env,
+ c_ocitem, m_ocitem_constructor, o_key);
+ if (o_ocitem == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_item: "
+ "Creating an OConfigItem object failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
+ return (NULL);
+ }
+
+ /* We don't need the String object any longer.. */
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_key);
+
+ /* Call OConfigItem.addValue for each value */
+ for (i = 0; i < ci->values_num; i++) /* {{{ */
+ {
+ jobject o_value;
+
+ o_value = ctoj_oconfig_value (jvm_env, ci->values[i]);
+ if (o_value == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_item: "
+ "Creating an OConfigValue object failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
+ return (NULL);
+ }
+
+ (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_value);
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_value);
+ } /* }}} for (i = 0; i < ci->values_num; i++) */
+
+ /* Call OConfigItem.addChild for each child */
+ for (i = 0; i < ci->children_num; i++) /* {{{ */
+ {
+ jobject o_child;
+
+ o_child = ctoj_oconfig_item (jvm_env, ci->children + i);
+ if (o_child == NULL)
+ {
+ ERROR ("java plugin: ctoj_oconfig_item: "
+ "Creating an OConfigItem object failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_ocitem);
+ return (NULL);
+ }
+
+ (*jvm_env)->CallVoidMethod (jvm_env, o_ocitem, m_addvalue, o_child);
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_child);
+ } /* }}} for (i = 0; i < ci->children_num; i++) */
+
+ return (o_ocitem);
+} /* }}} jobject ctoj_oconfig_item */
+
+/* Convert a data_set_t to a org.collectd.api.DataSet */
+static jobject ctoj_data_set (JNIEnv *jvm_env, const data_set_t *ds) /* {{{ */
+{
+ jclass c_dataset;
+ jmethodID m_constructor;
+ jmethodID m_add;
+ jobject o_type;
+ jobject o_dataset;
+ int i;
+
+ /* Look up the org.collectd.api.DataSet class */
+ c_dataset = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.DataSet");
+ if (c_dataset == NULL)
+ {
+ ERROR ("java plugin: ctoj_data_set: Looking up the "
+ "org.collectd.api.DataSet class failed.");
+ return (NULL);
+ }
+
+ /* Search for the `DataSet (String type)' constructor. */
+ m_constructor = (*jvm_env)->GetMethodID (jvm_env,
+ c_dataset, "<init>", "(Ljava.lang.String;)V");
+ if (m_constructor == NULL)
+ {
+ ERROR ("java plugin: ctoj_data_set: Looking up the "
+ "`DataSet (String)' constructor failed.");
+ return (NULL);
+ }
+
+ /* Search for the `void addDataSource (DataSource)' method. */
+ m_add = (*jvm_env)->GetMethodID (jvm_env,
+ c_dataset, "addDataSource", "(Lorg.collectd.api.DataSource;)V");
+ if (m_add == NULL)
+ {
+ ERROR ("java plugin: ctoj_data_set: Looking up the "
+ "`addDataSource (DataSource)' method failed.");
+ return (NULL);
+ }
+
+ o_type = (*jvm_env)->NewStringUTF (jvm_env, ds->type);
+ if (o_type == NULL)
+ {
+ ERROR ("java plugin: ctoj_data_set: Creating a String object failed.");
+ return (NULL);
+ }
+
+ o_dataset = (*jvm_env)->NewObject (jvm_env,
+ c_dataset, m_constructor, o_type);
+ if (o_dataset == NULL)
+ {
+ ERROR ("java plugin: ctoj_data_set: Creating a DataSet object failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
+ return (NULL);
+ }
+
+ /* Decrease reference counter on the java.lang.String object. */
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_type);
+
+ for (i = 0; i < ds->ds_num; i++)
+ {
+ jobject o_datasource;
+
+ o_datasource = ctoj_data_source (jvm_env, ds->ds + i);
+ if (o_datasource == NULL)
+ {
+ ERROR ("java plugin: ctoj_data_set: ctoj_data_source (%s.%s) failed",
+ ds->type, ds->ds[i].name);
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
+ return (NULL);
+ }
+
+ (*jvm_env)->CallVoidMethod (jvm_env, o_dataset, m_add, o_datasource);
+
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_datasource);
+ } /* for (i = 0; i < ds->ds_num; i++) */
+
+ return (o_dataset);
+} /* }}} jobject ctoj_data_set */
+
+static int ctoj_value_list_add_value (JNIEnv *jvm_env, /* {{{ */
+ value_t value, int ds_type,
+ jclass class_ptr, jobject object_ptr)
+{
+ jmethodID m_addvalue;
+ jobject o_number;
+
+ m_addvalue = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
+ "addValue", "(Ljava/lang/Number;)V");
+ if (m_addvalue == NULL)
+ {
+ ERROR ("java plugin: ctoj_value_list_add_value: "
+ "Cannot find method `void addValue (Number)'.");
+ return (-1);
+ }
+
+ o_number = ctoj_value_to_number (jvm_env, value, ds_type);
+ if (o_number == NULL)
+ {
+ ERROR ("java plugin: ctoj_value_list_add_value: "
+ "ctoj_value_to_number failed.");
+ return (-1);
+ }
+
+ (*jvm_env)->CallVoidMethod (jvm_env, object_ptr, m_addvalue, o_number);
+
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_number);
+
+ return (0);
+} /* }}} int ctoj_value_list_add_value */
+
+static int ctoj_value_list_add_data_set (JNIEnv *jvm_env, /* {{{ */
+ jclass c_valuelist, jobject o_valuelist, const data_set_t *ds)
+{
+ jmethodID m_setdataset;
+ jobject o_dataset;
+
+ /* Look for the `void setDataSource (List<DataSource> ds)' method. */
+ m_setdataset = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
+ "setDataSet", "(Lorg.collectd.api.DataSet;)V");
+ if (m_setdataset == NULL)
+ {
+ ERROR ("java plugin: ctoj_value_list_add_data_set: "
+ "Cannot find the `void setDataSet (DataSet)' method.");
+ return (-1);
+ }
+
+ /* Create a DataSet object. */
+ o_dataset = ctoj_data_set (jvm_env, ds);
+ if (o_dataset == NULL)
+ {
+ ERROR ("java plugin: ctoj_value_list_add_data_set: "
+ "ctoj_data_set (%s) failed.", ds->type);
+ return (-1);
+ }
+
+ /* Actually call the method. */
+ (*jvm_env)->CallVoidMethod (jvm_env,
+ o_valuelist, m_setdataset, o_dataset);
+
+ /* Decrease reference counter on the List<DataSource> object. */
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_dataset);
+
+ return (0);
+} /* }}} int ctoj_value_list_add_data_set */
+
+/* Convert a value_list_t (and data_set_t) to a org.collectd.api.ValueList */
+static jobject ctoj_value_list (JNIEnv *jvm_env, /* {{{ */
+ const data_set_t *ds, const value_list_t *vl)
+{
+ jclass c_valuelist;
+ jmethodID m_valuelist_constructor;
+ jobject o_valuelist;
+ int status;
+ int i;
+
+ /* First, create a new ValueList instance..
+ * Look up the class.. */
+ c_valuelist = (*jvm_env)->FindClass (jvm_env,
+ "org.collectd.api.ValueList");
+ if (c_valuelist == NULL)
+ {
+ ERROR ("java plugin: ctoj_value_list: "
+ "FindClass (org.collectd.api.ValueList) failed.");
+ return (NULL);
+ }
+
+ /* Lookup the `ValueList ()' constructor. */
+ m_valuelist_constructor = (*jvm_env)->GetMethodID (jvm_env, c_valuelist,
+ "<init>", "()V");
+ if (m_valuelist_constructor == NULL)
+ {
+ ERROR ("java plugin: ctoj_value_list: Cannot find the "
+ "`ValueList ()' constructor.");
+ return (NULL);
+ }
+
+ /* Create a new instance. */
+ o_valuelist = (*jvm_env)->NewObject (jvm_env, c_valuelist,
+ m_valuelist_constructor);
+ if (o_valuelist == NULL)
+ {
+ ERROR ("java plugin: ctoj_value_list: Creating a new ValueList instance "
+ "failed.");
+ return (NULL);
+ }
+
+ status = ctoj_value_list_add_data_set (jvm_env,
+ c_valuelist, o_valuelist, ds);
+ if (status != 0)
+ {
+ ERROR ("java plugin: ctoj_value_list: "
+ "ctoj_value_list_add_data_set failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
+ return (NULL);
+ }
+
+ /* Set the strings.. */
+#define SET_STRING(str,method_name) do { \
+ status = ctoj_string (jvm_env, str, \
+ c_valuelist, o_valuelist, method_name); \
+ if (status != 0) { \
+ ERROR ("java plugin: ctoj_value_list: jtoc_string (%s) failed.", \
+ method_name); \
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist); \
+ return (NULL); \
+ } } while (0)
+
+ SET_STRING (vl->host, "setHost");
+ SET_STRING (vl->plugin, "setPlugin");
+ SET_STRING (vl->plugin_instance, "setPluginInstance");
+ SET_STRING (vl->type, "setType");
+ SET_STRING (vl->type_instance, "setTypeInstance");
+
+#undef SET_STRING
+
+ /* Set the `time' member. Java stores time in milliseconds. */
+ status = ctoj_long (jvm_env, ((jlong) vl->time) * ((jlong) 1000),
+ c_valuelist, o_valuelist, "setTime");
+ if (status != 0)
+ {
+ ERROR ("java plugin: ctoj_value_list: ctoj_long (setTime) failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
+ return (NULL);
+ }
+
+ /* Set the `interval' member.. */
+ status = ctoj_long (jvm_env, (jlong) vl->interval,
+ c_valuelist, o_valuelist, "setInterval");
+ if (status != 0)
+ {
+ ERROR ("java plugin: ctoj_value_list: ctoj_long (setInterval) failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
+ return (NULL);
+ }
+
+ for (i = 0; i < vl->values_len; i++)
+ {
+ status = ctoj_value_list_add_value (jvm_env, vl->values[i], ds->ds[i].type,
+ c_valuelist, o_valuelist);
+ if (status != 0)
+ {
+ ERROR ("java plugin: ctoj_value_list: "
+ "ctoj_value_list_add_value failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_valuelist);
+ return (NULL);
+ }
+ }
+
+ return (o_valuelist);
+} /* }}} int ctoj_value_list */
+
+/*
+ * Java to C conversion functions
+ */
+/* Call a `String <method> ()' method. */
+static int jtoc_string (JNIEnv *jvm_env, /* {{{ */
+ char *buffer, size_t buffer_size,
+ jclass class_ptr, jobject object_ptr, const char *method_name)
+{
+ jmethodID method_id;
+ jobject string_obj;
+ const char *c_str;
+
+ method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
+ method_name, "()Ljava/lang/String;");
+ if (method_id == NULL)
+ {
+ ERROR ("java plugin: jtoc_string: Cannot find method `String %s ()'.",
+ method_name);
+ return (-1);
+ }
+
+ string_obj = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, method_id);
+ if (string_obj == NULL)
+ {
+ ERROR ("java plugin: jtoc_string: CallObjectMethod (%s) failed.",
+ method_name);
+ return (-1);
+ }
+
+ c_str = (*jvm_env)->GetStringUTFChars (jvm_env, string_obj, 0);
+ if (c_str == NULL)
+ {
+ ERROR ("java plugin: jtoc_string: GetStringUTFChars failed.");
+ (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
+ return (-1);
+ }
+
+ sstrncpy (buffer, c_str, buffer_size);
+
+ (*jvm_env)->ReleaseStringUTFChars (jvm_env, string_obj, c_str);
+ (*jvm_env)->DeleteLocalRef (jvm_env, string_obj);
+
+ return (0);
+} /* }}} int jtoc_string */
+
+/* Call a `long <method> ()' method. */
+static int jtoc_long (JNIEnv *jvm_env, /* {{{ */
+ jlong *ret_value,
+ jclass class_ptr, jobject object_ptr, const char *method_name)
+{
+ jmethodID method_id;
+
+ method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
+ method_name, "()J");
+ if (method_id == NULL)
+ {
+ ERROR ("java plugin: jtoc_long: Cannot find method `long %s ()'.",
+ method_name);
+ return (-1);
+ }
+
+ *ret_value = (*jvm_env)->CallLongMethod (jvm_env, object_ptr, method_id);
+
+ return (0);
+} /* }}} int jtoc_long */
+
+/* Call a `double <method> ()' method. */
+static int jtoc_double (JNIEnv *jvm_env, /* {{{ */
+ jdouble *ret_value,
+ jclass class_ptr, jobject object_ptr, const char *method_name)
+{
+ jmethodID method_id;
+
+ method_id = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
+ method_name, "()D");
+ if (method_id == NULL)
+ {
+ ERROR ("java plugin: jtoc_string: Cannot find method `double %s ()'.",
+ method_name);
+ return (-1);
+ }
+
+ *ret_value = (*jvm_env)->CallDoubleMethod (jvm_env, object_ptr, method_id);
+
+ return (0);
+} /* }}} int jtoc_double */
+
+static int jtoc_value (JNIEnv *jvm_env, /* {{{ */
+ value_t *ret_value, int ds_type, jobject object_ptr)
+{
+ jclass class_ptr;
+ int status;
+
+ class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
+
+ if (ds_type == DS_TYPE_COUNTER)
+ {
+ jlong tmp_long;
+
+ status = jtoc_long (jvm_env, &tmp_long,
+ class_ptr, object_ptr, "longValue");
+ if (status != 0)
+ {
+ ERROR ("java plugin: jtoc_value: "
+ "jtoc_long failed.");
+ return (-1);
+ }
+ (*ret_value).counter = (counter_t) tmp_long;
+ }
+ else
+ {
+ jdouble tmp_double;
+
+ status = jtoc_double (jvm_env, &tmp_double,
+ class_ptr, object_ptr, "doubleValue");
+ if (status != 0)
+ {
+ ERROR ("java plugin: jtoc_value: "
+ "jtoc_double failed.");
+ return (-1);
+ }
+ (*ret_value).gauge = (gauge_t) tmp_double;
+ }
+
+ return (0);
+} /* }}} int jtoc_value */
+
+/* Read a List<Number>, convert it to `value_t' and add it to the given
+ * `value_list_t'. */
+static int jtoc_values_array (JNIEnv *jvm_env, /* {{{ */
+ const data_set_t *ds, value_list_t *vl,
+ jclass class_ptr, jobject object_ptr)
+{
+ jmethodID m_getvalues;
+ jmethodID m_toarray;
+ jobject o_list;
+ jobjectArray o_number_array;
+
+ value_t *values;
+ int values_num;
+ int i;
+
+ values_num = ds->ds_num;
+
+ values = NULL;
+ o_number_array = NULL;
+ o_list = NULL;
+
+#define BAIL_OUT(status) \
+ free (values); \
+ if (o_number_array != NULL) \
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array); \
+ if (o_list != NULL) \
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_list); \
+ return (status);
+
+ /* Call: List<Number> ValueList.getValues () */
+ m_getvalues = (*jvm_env)->GetMethodID (jvm_env, class_ptr,
+ "getValues", "()Ljava/util/List;");
+ if (m_getvalues == NULL)
+ {
+ ERROR ("java plugin: jtoc_values_array: "
+ "Cannot find method `List getValues ()'.");
+ BAIL_OUT (-1);
+ }
+
+ o_list = (*jvm_env)->CallObjectMethod (jvm_env, object_ptr, m_getvalues);
+ if (o_list == NULL)
+ {
+ ERROR ("java plugin: jtoc_values_array: "
+ "CallObjectMethod (getValues) failed.");
+ BAIL_OUT (-1);
+ }
+
+ /* Call: Number[] List.toArray () */
+ m_toarray = (*jvm_env)->GetMethodID (jvm_env,
+ (*jvm_env)->GetObjectClass (jvm_env, o_list),
+ "toArray", "()[Ljava/lang/Object;");
+ if (m_toarray == NULL)
+ {
+ ERROR ("java plugin: jtoc_values_array: "
+ "Cannot find method `Object[] toArray ()'.");
+ BAIL_OUT (-1);
+ }
+
+ o_number_array = (*jvm_env)->CallObjectMethod (jvm_env, o_list, m_toarray);
+ if (o_number_array == NULL)
+ {
+ ERROR ("java plugin: jtoc_values_array: "
+ "CallObjectMethod (toArray) failed.");
+ BAIL_OUT (-1);
+ }
+
+ values = (value_t *) calloc (values_num, sizeof (value_t));
+ if (values == NULL)
+ {
+ ERROR ("java plugin: jtoc_values_array: calloc failed.");
+ BAIL_OUT (-1);
+ }
+
+ for (i = 0; i < values_num; i++)
+ {
+ jobject o_number;
+ int status;
+
+ o_number = (*jvm_env)->GetObjectArrayElement (jvm_env,
+ o_number_array, (jsize) i);
+ if (o_number == NULL)
+ {
+ ERROR ("java plugin: jtoc_values_array: "
+ "GetObjectArrayElement (%i) failed.", i);
+ BAIL_OUT (-1);
+ }
+
+ status = jtoc_value (jvm_env, values + i, ds->ds[i].type, o_number);
+ if (status != 0)
+ {
+ ERROR ("java plugin: jtoc_values_array: "
+ "jtoc_value (%i) failed.", i);
+ BAIL_OUT (-1);
+ }
+ } /* for (i = 0; i < values_num; i++) */
+
+ vl->values = values;
+ vl->values_len = values_num;
+
+#undef BAIL_OUT
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_number_array);
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_list);
+ return (0);
+} /* }}} int jtoc_values_array */
+
+/* Convert a org.collectd.api.ValueList to a value_list_t. */
+static int jtoc_value_list (JNIEnv *jvm_env, value_list_t *vl, /* {{{ */
+ jobject object_ptr)
+{
+ jclass class_ptr;
+ int status;
+ jlong tmp_long;
+ const data_set_t *ds;
+
+ class_ptr = (*jvm_env)->GetObjectClass (jvm_env, object_ptr);
+ if (class_ptr == NULL)
+ {
+ ERROR ("java plugin: jtoc_value_list: GetObjectClass failed.");
+ return (-1);
+ }
+
+#define SET_STRING(buffer,method) do { \
+ status = jtoc_string (jvm_env, buffer, sizeof (buffer), \
+ class_ptr, object_ptr, method); \
+ if (status != 0) { \
+ ERROR ("java plugin: jtoc_value_list: jtoc_string (%s) failed.", \
+ method); \
+ return (-1); \
+ } } while (0)
+
+ SET_STRING(vl->type, "getType");
+
+ ds = plugin_get_ds (vl->type);
+ if (ds == NULL)
+ {
+ ERROR ("java plugin: jtoc_value_list: Data-set `%s' is not defined. "
+ "Please consult the types.db(5) manpage for mor information.",
+ vl->type);
+ return (-1);
+ }
+
+ SET_STRING(vl->host, "getHost");
+ SET_STRING(vl->plugin, "getPlugin");
+ SET_STRING(vl->plugin_instance, "getPluginInstance");
+ SET_STRING(vl->type_instance, "getTypeInstance");
+
+#undef SET_STRING
+
+ status = jtoc_long (jvm_env, &tmp_long, class_ptr, object_ptr, "getTime");
+ if (status != 0)
+ {
+ ERROR ("java plugin: jtoc_value_list: jtoc_long (getTime) failed.");
+ return (-1);
+ }
+ /* Java measures time in milliseconds. */
+ vl->time = (time_t) (tmp_long / ((jlong) 1000));
+
+ status = jtoc_long (jvm_env, &tmp_long,
+ class_ptr, object_ptr, "getInterval");
+ if (status != 0)
+ {
+ ERROR ("java plugin: jtoc_value_list: jtoc_long (getInterval) failed.");
+ return (-1);
+ }
+ vl->interval = (int) tmp_long;
+
+ status = jtoc_values_array (jvm_env, ds, vl, class_ptr, object_ptr);
+ if (status != 0)
+ {
+ ERROR ("java plugin: jtoc_value_list: jtoc_values_array failed.");
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int jtoc_value_list */
+
+/*
+ * Functions accessible from Java
+ */
+static jint JNICALL cjni_api_dispatch_values (JNIEnv *jvm_env, /* {{{ */
+ jobject this, jobject java_vl)
+{
+ value_list_t vl = VALUE_LIST_INIT;
+ int status;
+
+ DEBUG ("cjni_api_dispatch_values: java_vl = %p;", (void *) java_vl);
+
+ status = jtoc_value_list (jvm_env, &vl, java_vl);
+ if (status != 0)
+ {
+ ERROR ("java plugin: cjni_api_dispatch_values: jtoc_value_list failed.");
+ return (-1);
+ }
+
+ status = plugin_dispatch_values (&vl);
+
+ sfree (vl.values);
+
+ return (status);
+} /* }}} jint cjni_api_dispatch_values */
+
+static jobject JNICALL cjni_api_get_ds (JNIEnv *jvm_env, /* {{{ */
+ jobject this, jobject o_string_type)
+{
+ const char *ds_name;
+ const data_set_t *ds;
+ jobject o_dataset;
+
+ ds_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_string_type, 0);
+ if (ds_name == NULL)
+ {
+ ERROR ("java plugin: cjni_api_get_ds: GetStringUTFChars failed.");
+ return (NULL);
+ }
+
+ ds = plugin_get_ds (ds_name);
+ DEBUG ("java plugin: cjni_api_get_ds: "
+ "plugin_get_ds (%s) = %p;", ds_name, (void *) ds);
+
+ (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_string_type, ds_name);
+
+ if (ds == NULL)
+ return (NULL);
+
+ o_dataset = ctoj_data_set (jvm_env, ds);
+ return (o_dataset);
+} /* }}} jint cjni_api_get_ds */
+
+static jint JNICALL cjni_api_register_config (JNIEnv *jvm_env, /* {{{ */
+ jobject this, jobject o_name, jobject o_config)
+{
+ return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_CONFIG));
+} /* }}} jint cjni_api_register_config */
+
+static jint JNICALL cjni_api_register_init (JNIEnv *jvm_env, /* {{{ */
+ jobject this, jobject o_name, jobject o_config)
+{
+ return (cjni_callback_register (jvm_env, o_name, o_config, CB_TYPE_INIT));
+} /* }}} jint cjni_api_register_init */
+
+static jint JNICALL cjni_api_register_read (JNIEnv *jvm_env, /* {{{ */
+ jobject this, jobject o_name, jobject o_read)
+{
+ user_data_t ud;
+ cjni_callback_info_t *cbi;
+
+ cbi = cjni_callback_info_create (jvm_env, o_name, o_read, CB_TYPE_READ);
+ if (cbi == NULL)
+ return (-1);
+
+ DEBUG ("java plugin: Registering new read callback: %s", cbi->name);
+
+ memset (&ud, 0, sizeof (ud));
+ ud.data = (void *) cbi;
+ ud.free_func = cjni_callback_info_destroy;
+
+ plugin_register_complex_read (cbi->name, cjni_read, &ud);
+
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_read);
+
+ return (0);
+} /* }}} jint cjni_api_register_read */
+
+static jint JNICALL cjni_api_register_write (JNIEnv *jvm_env, /* {{{ */
+ jobject this, jobject o_name, jobject o_write)
+{
+ user_data_t ud;
+ cjni_callback_info_t *cbi;
+
+ cbi = cjni_callback_info_create (jvm_env, o_name, o_write, CB_TYPE_WRITE);
+ if (cbi == NULL)
+ return (-1);
+
+ DEBUG ("java plugin: Registering new write callback: %s", cbi->name);
+
+ memset (&ud, 0, sizeof (ud));
+ ud.data = (void *) cbi;
+ ud.free_func = cjni_callback_info_destroy;
+
+ plugin_register_write (cbi->name, cjni_write, &ud);
+
+ (*jvm_env)->DeleteLocalRef (jvm_env, o_write);
+
+ return (0);
+} /* }}} jint cjni_api_register_write */
+
+static jint JNICALL cjni_api_register_shutdown (JNIEnv *jvm_env, /* {{{ */
+ jobject this, jobject o_name, jobject o_shutdown)
+{
+ return (cjni_callback_register (jvm_env, o_name, o_shutdown,
+ CB_TYPE_SHUTDOWN));
+} /* }}} jint cjni_api_register_shutdown */
+
+static void JNICALL cjni_api_log (JNIEnv *jvm_env, /* {{{ */
+ jobject this, jint severity, jobject o_message)
+{
+ const char *c_str;
+
+ c_str = (*jvm_env)->GetStringUTFChars (jvm_env, o_message, 0);
+ if (c_str == NULL)
+ {
+ ERROR ("java plugin: cjni_api_log: GetStringUTFChars failed.");
+ return;
+ }
+
+ if (severity < LOG_ERR)
+ severity = LOG_ERR;
+ if (severity > LOG_DEBUG)
+ severity = LOG_DEBUG;
+
+ plugin_log (severity, "%s", c_str);
+
+ (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_message, c_str);
+} /* }}} void cjni_api_log */
+
+/* List of ``native'' functions, i. e. C-functions that can be called from
+ * Java. */
+static JNINativeMethod jni_api_functions[] = /* {{{ */
+{
+ { "dispatchValues",
+ "(Lorg/collectd/api/ValueList;)I",
+ cjni_api_dispatch_values },
+
+ { "getDS",
+ "(Ljava/lang/String;)Lorg/collectd/api/DataSet;",
+ cjni_api_get_ds },
+
+ { "registerConfig",
+ "(Ljava/lang/String;Lorg/collectd/api/CollectdConfigInterface;)I",
+ cjni_api_register_config },
+
+ { "registerInit",
+ "(Ljava/lang/String;Lorg/collectd/api/CollectdInitInterface;)I",
+ cjni_api_register_init },
+
+ { "registerRead",
+ "(Ljava/lang/String;Lorg/collectd/api/CollectdReadInterface;)I",
+ cjni_api_register_read },
+
+ { "registerWrite",
+ "(Ljava/lang/String;Lorg/collectd/api/CollectdWriteInterface;)I",
+ cjni_api_register_write },
+
+ { "registerShutdown",
+ "(Ljava/lang/String;Lorg/collectd/api/CollectdShutdownInterface;)I",
+ cjni_api_register_shutdown },
+
+ { "log",
+ "(ILjava/lang/String;)V",
+ cjni_api_log },
+};
+static size_t jni_api_functions_num = sizeof (jni_api_functions)
+ / sizeof (jni_api_functions[0]);
+/* }}} */
+
+/*
+ * Functions
+ */
+/* Allocate a `cjni_callback_info_t' given the type and objects necessary for
+ * all registration functions. */
+static cjni_callback_info_t *cjni_callback_info_create (JNIEnv *jvm_env, /* {{{ */
+ jobject o_name, jobject o_callback, int type)
+{
+ const char *c_name;
+ cjni_callback_info_t *cbi;
+ const char *method_name;
+ const char *method_signature;
+
+ switch (type)
+ {
+ case CB_TYPE_CONFIG:
+ method_name = "config";
+ method_signature = "(Lorg/collectd/api/OConfigItem;)I";
+ break;
+
+ case CB_TYPE_INIT:
+ method_name = "init";
+ method_signature = "()I";
+ break;
+
+ case CB_TYPE_READ:
+ method_name = "read";
+ method_signature = "()I";
+ break;
+
+ case CB_TYPE_WRITE:
+ method_name = "write";
+ method_signature = "(Lorg/collectd/api/ValueList;)I";
+ break;
+
+ case CB_TYPE_SHUTDOWN:
+ method_name = "shutdown";
+ method_signature = "()I";
+ break;
+
+ default:
+ ERROR ("java plugin: cjni_callback_info_create: Unknown type: %#x",
+ type);
+ return (NULL);
+ }
+
+ c_name = (*jvm_env)->GetStringUTFChars (jvm_env, o_name, 0);
+ if (c_name == NULL)
+ {
+ ERROR ("java plugin: cjni_callback_info_create: "
+ "GetStringUTFChars failed.");
+ return (NULL);
+ }
+
+ cbi = (cjni_callback_info_t *) malloc (sizeof (*cbi));
+ if (cbi == NULL)
+ {
+ ERROR ("java plugin: cjni_callback_info_create: malloc failed.");
+ (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
+ return (NULL);
+ }
+ memset (cbi, 0, sizeof (*cbi));
+ cbi->type = type;
+
+ cbi->name = strdup (c_name);
+ if (cbi->name == NULL)
+ {
+ pthread_mutex_unlock (&java_callbacks_lock);
+ ERROR ("java plugin: cjni_callback_info_create: strdup failed.");
+ (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
+ return (NULL);
+ }
+
+ (*jvm_env)->ReleaseStringUTFChars (jvm_env, o_name, c_name);
+
+ cbi->class = (*jvm_env)->GetObjectClass (jvm_env, o_callback);
+ if (cbi->class == NULL)
+ {
+ ERROR ("java plugin: cjni_callback_info_create: GetObjectClass failed.");
+ free (cbi);
+ return (NULL);
+ }
+
+ cbi->object = o_callback;
+
+ cbi->method = (*jvm_env)->GetMethodID (jvm_env, cbi->class,
+ method_name, method_signature);
+ if (cbi->method == NULL)
+ {
+ ERROR ("java plugin: cjni_callback_info_create: "
+ "Cannot find the `%s' method with signature `%s'.",
+ method_name, method_signature);
+ free (cbi);
+ return (NULL);
+ }
+
+ (*jvm_env)->NewGlobalRef (jvm_env, o_callback);
+
+ return (cbi);
+} /* }}} cjni_callback_info_t cjni_callback_info_create */
+
+/* Allocate a `cjni_callback_info_t' via `cjni_callback_info_create' and add it
+ * to the global `java_callbacks' variable. This is used for `config', `init',
+ * and `shutdown' callbacks. */
+static int cjni_callback_register (JNIEnv *jvm_env, /* {{{ */
+ jobject o_name, jobject o_callback, int type)
+{
+ cjni_callback_info_t *cbi;
+ cjni_callback_info_t *tmp;
+#if COLLECT_DEBUG
+ const char *type_str;
+#endif
+
+ cbi = cjni_callback_info_create (jvm_env, o_name, o_callback, type);
+ if (cbi == NULL)
+ return (-1);
+
+#if COLLECT_DEBUG
+ switch (type)
+ {
+ case CB_TYPE_CONFIG:
+ type_str = "config";
+ break;
+
+ case CB_TYPE_INIT:
+ type_str = "init";
+ break;
+
+ case CB_TYPE_SHUTDOWN:
+ type_str = "shutdown";
+ break;
+
+ default:
+ type_str = "<unknown>";
+ }
+ DEBUG ("java plugin: Registering new %s callback: %s",
+ type_str, cbi->name);
+#endif
+
+ pthread_mutex_lock (&java_callbacks_lock);
+
+ tmp = (cjni_callback_info_t *) realloc (java_callbacks,
+ (java_callbacks_num + 1) * sizeof (*java_callbacks));
+ if (tmp == NULL)
+ {
+ pthread_mutex_unlock (&java_callbacks_lock);
+ ERROR ("java plugin: cjni_callback_register: realloc failed.");
+
+ (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
+ free (cbi);
+
+ return (-1);
+ }
+ java_callbacks = tmp;
+ java_callbacks[java_callbacks_num] = *cbi;
+ java_callbacks_num++;
+
+ pthread_mutex_unlock (&java_callbacks_lock);
+
+ free (cbi);
+ return (0);
+} /* }}} int cjni_callback_register */
+
+/* Increase the reference counter to the JVM for this thread. If it was zero,
+ * attach the JVM first. */
+static JNIEnv *cjni_thread_attach (void) /* {{{ */
+{
+ cjni_jvm_env_t *cjni_env;
+ JNIEnv *jvm_env;
+
+ cjni_env = pthread_getspecific (jvm_env_key);
+ if (cjni_env == NULL)
+ {
+ /* This pointer is free'd in `cjni_jvm_env_destroy'. */
+ cjni_env = (cjni_jvm_env_t *) malloc (sizeof (*cjni_env));
+ if (cjni_env == NULL)
+ {
+ ERROR ("java plugin: cjni_thread_attach: malloc failed.");
+ return (NULL);
+ }
+ memset (cjni_env, 0, sizeof (*cjni_env));
+ cjni_env->reference_counter = 0;
+ cjni_env->jvm_env = NULL;
+
+ pthread_setspecific (jvm_env_key, cjni_env);
+ }
+
+ if (cjni_env->reference_counter > 0)
+ {
+ cjni_env->reference_counter++;
+ jvm_env = cjni_env->jvm_env;
+ }
+ else
+ {
+ int status;
+ JavaVMAttachArgs args;
+
+ assert (cjni_env->jvm_env == NULL);
+
+ memset (&args, 0, sizeof (args));
+ args.version = JNI_VERSION_1_2;
+
+ status = (*jvm)->AttachCurrentThread (jvm, (void *) &jvm_env, (void *) &args);
+ if (status != 0)
+ {
+ ERROR ("java plugin: cjni_thread_attach: AttachCurrentThread failed "
+ "with status %i.", status);
+ return (NULL);
+ }
+
+ cjni_env->reference_counter = 1;
+ cjni_env->jvm_env = jvm_env;
+ }
+
+ DEBUG ("java plugin: cjni_thread_attach: cjni_env->reference_counter = %i",
+ cjni_env->reference_counter);
+ assert (jvm_env != NULL);
+ return (jvm_env);
+} /* }}} JNIEnv *cjni_thread_attach */
+
+/* Decrease the reference counter of this thread. If it reaches zero, detach
+ * from the JVM. */
+static int cjni_thread_detach (void) /* {{{ */
+{
+ cjni_jvm_env_t *cjni_env;
+ int status;
+
+ cjni_env = pthread_getspecific (jvm_env_key);
+ if (cjni_env == NULL)
+ {
+ ERROR ("java plugin: cjni_thread_detach: pthread_getspecific failed.");
+ return (-1);
+ }
+
+ assert (cjni_env->reference_counter > 0);
+ assert (cjni_env->jvm_env != NULL);
+
+ cjni_env->reference_counter--;
+ DEBUG ("java plugin: cjni_thread_detach: cjni_env->reference_counter = %i",
+ cjni_env->reference_counter);
+
+ if (cjni_env->reference_counter > 0)
+ return (0);
+
+ status = (*jvm)->DetachCurrentThread (jvm);
+ if (status != 0)
+ {
+ ERROR ("java plugin: cjni_thread_detach: DetachCurrentThread failed "
+ "with status %i.", status);
+ }
+
+ cjni_env->reference_counter = 0;
+ cjni_env->jvm_env = NULL;
+
+ return (0);
+} /* }}} JNIEnv *cjni_thread_attach */
+
+/* Callback for `pthread_key_create'. It frees the data contained in
+ * `jvm_env_key' and prints a warning if the reference counter is not zero. */
+static void cjni_jvm_env_destroy (void *args) /* {{{ */
+{
+ cjni_jvm_env_t *cjni_env;
+
+ if (args == NULL)
+ return;
+
+ cjni_env = (cjni_jvm_env_t *) args;
+
+ if (cjni_env->reference_counter > 0)
+ {
+ ERROR ("java plugin: cjni_jvm_env_destroy: "
+ "cjni_env->reference_counter = %i;", cjni_env->reference_counter);
+ }
+
+ if (cjni_env->jvm_env != NULL)
+ {
+ ERROR ("java plugin: cjni_jvm_env_destroy: cjni_env->jvm_env = %p;",
+ (void *) cjni_env->jvm_env);
+ }
+
+ /* The pointer is allocated in `cjni_thread_attach' */
+ free (cjni_env);
+} /* }}} void cjni_jvm_env_destroy */
+
+/* Boring configuration functions.. {{{ */
+static int cjni_config_add_jvm_arg (oconfig_item_t *ci) /* {{{ */
+{
+ char **tmp;
+
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("java plugin: `JVMArg' needs exactly one string argument.");
+ return (-1);
+ }
+
+ tmp = (char **) realloc (jvm_argv, sizeof (char *) * (jvm_argc + 1));
+ if (tmp == NULL)
+ {
+ ERROR ("java plugin: realloc failed.");
+ return (-1);
+ }
+ jvm_argv = tmp;
+
+ jvm_argv[jvm_argc] = strdup (ci->values[0].value.string);
+ if (jvm_argv[jvm_argc] == NULL)
+ {
+ ERROR ("java plugin: strdup failed.");
+ return (-1);
+ }
+ jvm_argc++;
+
+ return (0);
+} /* }}} int cjni_config_add_jvm_arg */
+
+static int cjni_config_load_plugin (oconfig_item_t *ci) /* {{{ */
+{
+ java_plugin_class_t *tmp;
+
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("java plugin: `LoadPlugin' needs exactly one string argument.");
+ return (-1);
+ }
+
+ tmp = (java_plugin_class_t *) realloc (java_classes_list,
+ (java_classes_list_len + 1) * sizeof (*java_classes_list));
+ if (tmp == NULL)
+ {
+ ERROR ("java plugin: realloc failed.");
+ return (-1);
+ }
+ java_classes_list = tmp;
+ tmp = java_classes_list + java_classes_list_len;
+
+ memset (tmp, 0, sizeof (*tmp));
+ tmp->name = strdup (ci->values[0].value.string);
+ if (tmp->name == NULL)
+ {
+ ERROR ("java plugin: strdup failed.");
+ return (-1);
+ }
+ tmp->class = NULL;
+ tmp->object = NULL;
+
+ java_classes_list_len++;
+
+ return (0);
+} /* }}} int cjni_config_load_plugin */
+
+static int cjni_config_plugin_block (oconfig_item_t *ci) /* {{{ */
+{
+ java_plugin_config_t *tmp;
+ char *name;
+ size_t i;
+
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("java plugin: `Plugin' blocks "
+ "need exactly one string argument.");
+ return (-1);
+ }
+
+ name = strdup (ci->values[0].value.string);
+ if (name == NULL)
+ {
+ ERROR ("java plugin: cjni_config_plugin_block: strdup faiiled.");
+ return (-1);
+ }
+
+ for (i = 0; i < java_plugin_configs_num; i++)
+ {
+ if (strcmp (java_plugin_configs[i].name, name) == 0)
+ {
+ WARNING ("java plugin: There is more than one <Plugin \"%s\"> block. "
+ "This is currently not supported - "
+ "only the first block will be used!",
+ name);
+ free (name);
+ return (0);
+ }
+ }
+
+ tmp = (java_plugin_config_t *) realloc (java_plugin_configs,
+ (java_plugin_configs_num + 1) * sizeof (*java_plugin_configs));
+ if (tmp == NULL)
+ {
+ ERROR ("java plugin: cjni_config_plugin_block: realloc failed.");
+ free (name);
+ return (-1);
+ }
+ java_plugin_configs = tmp;
+ tmp = java_plugin_configs + java_plugin_configs_num;
+
+ tmp->name = name;
+ tmp->ci = oconfig_clone (ci);
+ if (tmp->ci == NULL)
+ {
+ ERROR ("java plugin: cjni_config_plugin_block: "
+ "oconfig_clone failed for `%s'.",
+ name);
+ free (name);
+ return (-1);
+ }
+
+ DEBUG ("java plugin: cjni_config_plugin_block: "
+ "Successfully copied config for `%s'.",
+ name);
+
+ java_plugin_configs_num++;
+ return (0);
+} /* }}} int cjni_config_plugin_block */
+
+static int cjni_config (oconfig_item_t *ci) /* {{{ */
+{
+ int success;
+ int errors;
+ int status;
+ int i;
+
+ success = 0;
+ errors = 0;
+
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("JVMArg", child->key) == 0)
+ {
+ status = cjni_config_add_jvm_arg (child);
+ if (status == 0)
+ success++;
+ else
+ errors++;
+ }
+ else if (strcasecmp ("LoadPlugin", child->key) == 0)
+ {
+ status = cjni_config_load_plugin (child);
+ if (status == 0)
+ success++;
+ else
+ errors++;
+ }
+ else if (strcasecmp ("Plugin", child->key) == 0)
+ {
+ status = cjni_config_plugin_block (child);
+ if (status == 0)
+ success++;
+ else
+ errors++;
+ }
+ else
+ {
+ WARNING ("java plugin: Option `%s' not allowed here.", child->key);
+ errors++;
+ }
+ }
+
+ DEBUG ("java plugin: jvm_argc = %zu;", jvm_argc);
+ DEBUG ("java plugin: java_classes_list_len = %zu;", java_classes_list_len);
+ DEBUG ("java plugin: java_plugin_configs_num = %zu;",
+ java_plugin_configs_num);
+
+ if ((success == 0) && (errors > 0))
+ {
+ ERROR ("java plugin: All statements failed.");
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int cjni_config */
+/* }}} */
+
+/* Free the data contained in the `user_data_t' pointer passed to `cjni_read'
+ * and `cjni_write'. In particular, delete the global reference to the Java
+ * object. */
+static void cjni_callback_info_destroy (void *arg) /* {{{ */
+{
+ JNIEnv *jvm_env;
+ cjni_callback_info_t *cbi;
+
+ DEBUG ("java plugin: cjni_callback_info_destroy (arg = %p);", arg);
+
+ if (arg == NULL)
+ return;
+
+ jvm_env = cjni_thread_attach ();
+ if (jvm_env == NULL)
+ {
+ ERROR ("java plugin: cjni_callback_info_destroy: cjni_thread_attach failed.");
+ return;
+ }
+
+ cbi = (cjni_callback_info_t *) arg;
+
+ (*jvm_env)->DeleteGlobalRef (jvm_env, cbi->object);
+
+ cbi->method = NULL;
+ cbi->object = NULL;
+ cbi->class = NULL;
+ free (cbi);
+
+ cjni_thread_detach ();
+} /* }}} void cjni_callback_info_destroy */
+
+/* Call the CB_TYPE_READ callback pointed to by the `user_data_t' pointer. */
+static int cjni_read (user_data_t *ud) /* {{{ */
+{
+ JNIEnv *jvm_env;
+ cjni_callback_info_t *cbi;
+ int status;
+
+ if (jvm == NULL)
+ {
+ ERROR ("java plugin: cjni_read: jvm == NULL");
+ return (-1);
+ }
+
+ if ((ud == NULL) || (ud->data == NULL))
+ {
+ ERROR ("java plugin: cjni_read: Invalid user data.");
+ return (-1);
+ }
+
+ jvm_env = cjni_thread_attach ();
+ if (jvm_env == NULL)
+ return (-1);
+
+ cbi = (cjni_callback_info_t *) ud->data;
+
+ status = (*jvm_env)->CallIntMethod (jvm_env, cbi->object,
+ cbi->method);
+
+ status = cjni_thread_detach ();
+ if (status != 0)
+ {
+ ERROR ("java plugin: cjni_read: cjni_thread_detach failed.");
+ return (-1);
+ }
+
+ return (status);
+} /* }}} int cjni_read */
+
+/* Call the CB_TYPE_WRITE callback pointed to by the `user_data_t' pointer. */
+static int cjni_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
+ user_data_t *ud)
+{
+ JNIEnv *jvm_env;
+ cjni_callback_info_t *cbi;
+ jobject vl_java;
+ int status;
+
+ if (jvm == NULL)
+ {
+ ERROR ("java plugin: cjni_write: jvm == NULL");
+ return (-1);
+ }
+
+ if ((ud == NULL) || (ud->data == NULL))
+ {
+ ERROR ("java plugin: cjni_write: Invalid user data.");
+ return (-1);
+ }
+
+ jvm_env = cjni_thread_attach ();
+ if (jvm_env == NULL)
+ return (-1);
+
+ cbi = (cjni_callback_info_t *) ud->data;
+
+ vl_java = ctoj_value_list (jvm_env, ds, vl);
+ if (vl_java == NULL)
+ {
+ ERROR ("java plugin: cjni_write: ctoj_value_list failed.");
+ return (-1);
+ }
+
+ status = (*jvm_env)->CallIntMethod (jvm_env,
+ cbi->object, cbi->method, vl_java);
+
+ (*jvm_env)->DeleteLocalRef (jvm_env, vl_java);
+
+ status = cjni_thread_detach ();
+ if (status != 0)
+ {
+ ERROR ("java plugin: cjni_write: cjni_thread_detach failed.");
+ return (-1);
+ }
+
+ return (status);
+} /* }}} int cjni_write */
+
+/* Iterate over `java_classes_list' and create one object of each class. This
+ * will trigger the object's constructors, to the objects can register callback
+ * methods. */
+static int cjni_load_plugins (JNIEnv *jvm_env) /* {{{ */
+{
+ size_t i;
+
+ for (i = 0; i < java_classes_list_len; i++)
+ {
+ java_plugin_class_t *class;
+ jmethodID constructor_id;
+
+ class = java_classes_list + i;
+
+ DEBUG ("java plugin: Loading class %s", class->name);
+
+ class->class = (*jvm_env)->FindClass (jvm_env, class->name);
+ if (class->class == NULL)
+ {
+ ERROR ("java plugin: cjni_load_plugins: FindClass (%s) failed.",
+ class->name);
+ continue;
+ }
+
+ constructor_id = (*jvm_env)->GetMethodID (jvm_env, class->class,
+ "<init>", "()V");
+ if (constructor_id == NULL)
+ {
+ ERROR ("java plugin: cjni_load_plugins: Could not find the constructor for `%s'.",
+ class->name);
+ continue;
+ }
+
+ class->object = (*jvm_env)->NewObject (jvm_env, class->class,
+ constructor_id);
+ if (class->object == NULL)
+ {
+ ERROR ("java plugin: cjni_load_plugins: Could create a new `%s' object.",
+ class->name);
+ continue;
+ }
+
+ (*jvm_env)->NewGlobalRef (jvm_env, class->object);
+ } /* for (i = 0; i < java_classes_list_len; i++) */
+
+ return (0);
+} /* }}} int cjni_load_plugins */
+
+/* Iterate over `java_plugin_configs' and `java_callbacks' and call all
+ * `config' callback methods for which a configuration is available. */
+static int cjni_config_plugins (JNIEnv *jvm_env) /* {{{ */
+{
+ int status;
+ size_t i;
+ size_t j;
+
+ for (i = 0; i < java_plugin_configs_num; i++)
+ {
+ jobject o_ocitem;
+
+ if (java_plugin_configs[i].ci == NULL)
+ continue;
+
+ for (j = 0; j < java_callbacks_num; j++)
+ {
+ if (java_callbacks[j].type != CB_TYPE_CONFIG)
+ continue;
+
+ if (strcmp (java_plugin_configs[i].name, java_callbacks[j].name) == 0)
+ break;
+ }
+
+ if (j >= java_callbacks_num)
+ {
+ NOTICE ("java plugin: Configuration for `%s' is present, but no such "
+ "configuration callback has been registered.",
+ java_plugin_configs[i].name);
+ continue;
+ }
+
+ DEBUG ("java plugin: Configuring %s", java_plugin_configs[i].name);
+
+ o_ocitem = ctoj_oconfig_item (jvm_env, java_plugin_configs[i].ci);
+ if (o_ocitem == NULL)
+ {
+ ERROR ("java plugin: cjni_config_plugins: ctoj_oconfig_item failed.");
+ continue;
+ }
+
+ status = (*jvm_env)->CallIntMethod (jvm_env,
+ java_callbacks[j].object, java_callbacks[j].method, o_ocitem);
+ WARNING ("java plugin: Config callback for `%s' returned status %i.",
+ java_plugin_configs[i].name, status);
+ } /* for (i = 0; i < java_plugin_configs; i++) */
+
+ return (0);
+} /* }}} int cjni_config_plugins */
+
+/* Iterate over `java_callbacks' and call all CB_TYPE_INIT callbacks. */
+static int cjni_init_plugins (JNIEnv *jvm_env) /* {{{ */
+{
+ int status;
+ size_t i;
+
+ for (i = 0; i < java_callbacks_num; i++)
+ {
+ if (java_callbacks[i].type != CB_TYPE_INIT)
+ continue;
+
+ DEBUG ("java plugin: Initializing %s", java_callbacks[i].name);
+
+ status = (*jvm_env)->CallIntMethod (jvm_env,
+ java_callbacks[i].object, java_callbacks[i].method);
+ if (status != 0)
+ {
+ ERROR ("java plugin: Initializing `%s' failed with status %i. "
+ "Removing read function.",
+ java_callbacks[i].name, status);
+ plugin_unregister_read (java_callbacks[i].name);
+ }
+ }
+
+ return (0);
+} /* }}} int cjni_init_plugins */
+
+/* Iterate over `java_callbacks' and call all CB_TYPE_SHUTDOWN callbacks. */
+static int cjni_shutdown_plugins (JNIEnv *jvm_env) /* {{{ */
+{
+ int status;
+ size_t i;
+
+ for (i = 0; i < java_callbacks_num; i++)
+ {
+ if (java_callbacks[i].type != CB_TYPE_SHUTDOWN)
+ continue;
+
+ DEBUG ("java plugin: Shutting down %s", java_callbacks[i].name);
+
+ status = (*jvm_env)->CallIntMethod (jvm_env,
+ java_callbacks[i].object, java_callbacks[i].method);
+ if (status != 0)
+ {
+ ERROR ("java plugin: Shutting down `%s' failed with status %i. ",
+ java_callbacks[i].name, status);
+ }
+ }
+
+ return (0);
+} /* }}} int cjni_shutdown_plugins */
+
+
+static int cjni_shutdown (void) /* {{{ */
+{
+ JNIEnv *jvm_env;
+ JavaVMAttachArgs args;
+ int status;
+ size_t i;
+
+ if (jvm == NULL)
+ return (0);
+
+ jvm_env = NULL;
+ memset (&args, 0, sizeof (args));
+ args.version = JNI_VERSION_1_2;
+
+ status = (*jvm)->AttachCurrentThread (jvm, (void **) &jvm_env, &args);
+ if (status != 0)
+ {
+ ERROR ("java plugin: cjni_shutdown: AttachCurrentThread failed with status %i.",
+ status);
+ return (-1);
+ }
+
+ /* Execute all the shutdown functions registered by plugins. */
+ cjni_shutdown_plugins (jvm_env);
+
+ /* Release all the global references to callback functions */
+ for (i = 0; i < java_callbacks_num; i++)
+ {
+ if (java_callbacks[i].object != NULL)
+ {
+ (*jvm_env)->DeleteGlobalRef (jvm_env, java_callbacks[i].object);
+ java_callbacks[i].object = NULL;
+ }
+ sfree (java_callbacks[i].name);
+ }
+ java_callbacks_num = 0;
+ sfree (java_callbacks);
+
+ /* Release all the global references to directly loaded classes. */
+ for (i = 0; i < java_classes_list_len; i++)
+ {
+ if (java_classes_list[i].object != NULL)
+ {
+ (*jvm_env)->DeleteGlobalRef (jvm_env, java_classes_list[i].object);
+ java_classes_list[i].object = NULL;
+ }
+ sfree (java_classes_list[i].name);
+ }
+ java_classes_list_len = 0;
+ sfree (java_classes_list);
+
+ /* Destroy the JVM */
+ (*jvm)->DestroyJavaVM (jvm);
+ jvm = NULL;
+ jvm_env = NULL;
+
+ pthread_key_delete (jvm_env_key);
+
+ /* Free the JVM argument list */
+ for (i = 0; i < jvm_argc; i++)
+ sfree (jvm_argv[i]);
+ jvm_argc = 0;
+ sfree (jvm_argv);
+
+ /* Free the copied configuration */
+ for (i = 0; i < java_plugin_configs_num; i++)
+ {
+ sfree (java_plugin_configs[i].name);
+ oconfig_free (java_plugin_configs[i].ci);
+ }
+ java_plugin_configs_num = 0;
+ sfree (java_plugin_configs);
+
+ return (0);
+} /* }}} int cjni_shutdown */
+
+/* Register ``native'' functions with the JVM. Native functions are C-functions
+ * that can be called by Java code. */
+static int cjni_init_native (JNIEnv *jvm_env) /* {{{ */
+{
+ jclass api_class_ptr;
+ int status;
+
+ api_class_ptr = (*jvm_env)->FindClass (jvm_env, "org.collectd.api.Collectd");
+ if (api_class_ptr == NULL)
+ {
+ ERROR ("cjni_init_native: Cannot find API class `org.collectd.api.Collectd'.");
+ return (-1);
+ }
+
+ status = (*jvm_env)->RegisterNatives (jvm_env, api_class_ptr,
+ jni_api_functions, (jint) jni_api_functions_num);
+ if (status != 0)
+ {
+ ERROR ("cjni_init_native: RegisterNatives failed with status %i.", status);
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int cjni_init_native */
+
+/* Initialization: Create a JVM, load all configured classes and call their
+ * `config' and `init' callback methods. */
+static int cjni_init (void) /* {{{ */
+{
+ JNIEnv *jvm_env;
+ JavaVMInitArgs vm_args;
+ JavaVMOption vm_options[jvm_argc];
+
+ int status;
+ size_t i;
+
+ if (jvm != NULL)
+ return (0);
+
+ status = pthread_key_create (&jvm_env_key, cjni_jvm_env_destroy);
+ if (status != 0)
+ {
+ ERROR ("java plugin: cjni_init: pthread_key_create failed "
+ "with status %i.", status);
+ return (-1);
+ }
+
+ jvm_env = NULL;
+
+ memset (&vm_args, 0, sizeof (vm_args));
+ vm_args.version = JNI_VERSION_1_2;
+ vm_args.options = vm_options;
+ vm_args.nOptions = (jint) jvm_argc;
+
+ for (i = 0; i < jvm_argc; i++)
+ {
+ DEBUG ("java plugin: cjni_init: jvm_argv[%zu] = %s", i, jvm_argv[i]);
+ vm_args.options[i].optionString = jvm_argv[i];
+ }
+ /*
+ vm_args.options[0].optionString = "-verbose:jni";
+ vm_args.options[1].optionString = "-Djava.class.path=/home/octo/collectd/bindings/java";
+ */
+
+ status = JNI_CreateJavaVM (&jvm, (void **) &jvm_env, (void **) &vm_args);
+ if (status != 0)
+ {
+ ERROR ("cjni_init: JNI_CreateJavaVM failed with status %i.",
+ status);
+ return (-1);
+ }
+ assert (jvm != NULL);
+ assert (jvm_env != NULL);
+
+ /* Call RegisterNatives */
+ status = cjni_init_native (jvm_env);
+ if (status != 0)
+ {
+ ERROR ("cjni_init: cjni_init_native failed.");
+ return (-1);
+ }
+
+ cjni_load_plugins (jvm_env);
+ cjni_config_plugins (jvm_env);
+ cjni_init_plugins (jvm_env);
+
+ return (0);
+} /* }}} int cjni_init */
+
+void module_register (void)
+{
+ plugin_register_complex_config ("java", cjni_config);
+ plugin_register_init ("java", cjni_init);
+ plugin_register_shutdown ("java", cjni_shutdown);
+} /* void module_register (void) */
+
+/* vim: set sw=2 sts=2 et fdm=marker : */
projects / collectd.git / commitdiff