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/*
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2009 OpenLink Software
*
* This project 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, dated June 1991.
*
* 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
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <jni.h>
#include <ksrvext.h>
static JavaVM *java_vm = NULL;
static dk_mutex_t *java_vm_mutex = NULL;
static caddr_t
java_vm_create (JNIEnv ** java_vm_env)
{
JavaVMInitArgs vm_args;
JavaVMOption options[5];
jint res;
caddr_t classpath_opt = NULL;
int inx;
char *classpath = NULL;
if (!classpath)
{
classpath=getenv ("CLASSPATH");
}
if (!classpath)
{
classpath= ".";
}
classpath_opt = dk_alloc_box (strlen (classpath) + 20, DV_SHORT_STRING);
sprintf (classpath_opt, "-Djava.class.path=%s", classpath);
options[0].optionString = classpath_opt;
vm_args.nOptions = 1;
vm_args.version = JNI_VERSION_1_2;
vm_args.options = options;
vm_args.ignoreUnrecognized = JNI_FALSE;
res = JNI_CreateJavaVM (&java_vm, (void **) java_vm_env, &vm_args);
if (res < 0)
return srv_make_new_error ("42000", "JV002", "Can't create the Java VM");
else
return NULL;
}
static caddr_t
java_vm_attach (JNIEnv ** env)
{
caddr_t err = NULL;
mutex_enter (java_vm_mutex);
*env = NULL;
if (!java_vm)
{
err = java_vm_create (env);
if (err)
{
mutex_leave (java_vm_mutex);
return err;
}
}
else
{
if (JNI_OK != (*java_vm)->GetEnv (java_vm, (void **) env, JNI_VERSION_1_2))
{
if (0 > (*java_vm)->AttachCurrentThread (java_vm, (void **) env,
NULL))
{
err =
srv_make_new_error ("42000", "JV003",
"Can't attach to the java VM");
mutex_leave (java_vm_mutex);
return err;
}
}
}
mutex_leave (java_vm_mutex);
return err;
}
static caddr_t
java_vm_detach (void)
{
jint rc;
mutex_enter (java_vm_mutex);
rc = (*java_vm)->DetachCurrentThread (java_vm);
mutex_leave (java_vm_mutex);
if (rc < 0)
return srv_make_new_error ("42000", "JV004",
"Can't dettach from the java VM");
else
{
log_debug ("Thread %p detached from the Java VM", thread_current());
return NULL;
}
}
static caddr_t
bif_do_something_bif (caddr_t * qst, caddr_t * err_ret, state_slot_t ** args)
{
JNIEnv *env = NULL;
jclass class_obj;
jmethodID work_method_obj, cleanup_method_obj;
jint ret;
jvalue jargs[1];
query_instance_t *qi = (query_instance_t *)qst;
if (NULL != (*err_ret = java_vm_attach (&env)))
goto finish;
class_obj = (*env)->FindClass (env, "handler_class");
work_method_obj =
(*env)->GetStaticMethodID (env, class_obj, "do_bit_of_work", "()I");
cleanup_method_obj =
(*env)->GetStaticMethodID (env, class_obj, "cleanup_the_staff", "()V");
while (0 < (ret = (*env)->CallStaticIntMethodA (env, class_obj, work_method_obj, jargs)))
{
if (qi_have_trx_error (qi))
{
(*env)->CallStaticVoidMethodA (env, class_obj, cleanup_method_obj, jargs);
goto finish;
}
}
finish:
if (env)
{
caddr_t err = java_vm_detach ();
if (!*err_ret)
*err_ret = err;
else
dk_free_tree (err);
}
qi_check_trx_error (qi, 1);
return NULL;
}
void
bif_init_func_javavm (void)
{
java_vm_mutex = mutex_allocate ();
bif_define ("do_something_bif", bif_do_something_bif);
}
int
main (int argc, char *argv[])
{
VirtuosoServerSetInitHook (bif_init_func_javavm);
return VirtuosoServerMain (argc, argv);
}
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