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init_jni.c
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init_jni.c
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#include <jni.h>
#include <postgres.h>
#ifdef __APPLE__
#undef false
#undef true
#include <libproc.h>
#endif
#include <limits.h>
#include <syslog.h>
#include <unistd.h>
#include <dirent.h>
#include <utils/guc.h>
JNIEnv *env;
JavaVM* s_javaVM = NULL;
JNIEnv* jniEnv;
JavaVMOption options[20];
// the postgres server datadir
extern char *DataDir;
extern void doJVMinit(void);
static char *getPGdir() {
// WARNING: this code will only work on linux or OS X
#ifdef __APPLE__
char pathbuf[PROC_PIDPATHINFO_MAXSIZE];
int pid = getpid();
int ret = proc_pidpath(pid, pathbuf, PROC_PIDPATHINFO_MAXSIZE);
if ( ret <= 0 ) {
syslog(LOG_ERR, "PID %d: proc_pidpath ();\n", pid);
syslog(LOG_ERR, " %s\n", strerror(errno));
} else {
syslog(LOG_ERR, "proc %d: %s\n", pid, pathbuf);
}
#else
char pathbuf[PATH_MAX];
const char* exe_sym_path = "/proc/self/exe";
// when BSD: /proc/curproc/file
// when Solaris: /proc/self/path/a.out
// Unix: getexecname(3)
ssize_t ret = readlink(exe_sym_path, pathbuf, PATH_MAX);
if (ret == PATH_MAX || ret == -1) {
syslog(LOG_ERR, "Getting executable path: %s\n",strerror(errno));
} else {
pathbuf[ret] = '\0';
}
#endif
char *lst = strrchr(pathbuf,'/'); // last slash in path
int n = lst-pathbuf;
return pnstrdup(pathbuf, n);
}
static char *getClasspath() {
char buf[50000];
char *pbuf = getPGdir();
/* get all the jar fles in the jar directory and append? */
snprintf(buf, 10000, "-Djava.class.path=%s/../lib/pg_jinx.jar:%s/../lib/pljava.jar", pbuf,pbuf);
char zbuf[4096];
struct dirent *ep;
snprintf(zbuf, 4096, "%s/../ext",DataDir);
// Get all the jars in the ext directory
DIR *dp = opendir(zbuf);
if (dp != NULL) {
while (ep = readdir(dp)) {
int n = strlen(ep->d_name);
if (n < 5) continue;
if ( strcmp(ep->d_name+n-4, ".jar") == 0) {
snprintf(zbuf,4096,":%s/../ext/%s",DataDir,ep->d_name);
strlcat(buf, zbuf, 50000);
}
}
(void) closedir (dp);
}
syslog(LOG_ERR, "classpath = %s\n", buf);
return pstrdup(buf);
}
/*
#define STRINGIZE(x) #x
#define STRINGIZE2(x) STRINGIZE(x)
*/
void doJVMinit() {
jsize nVMs;
JavaVM *vmBuf[2];
JNI_GetCreatedJavaVMs(vmBuf, 2, &nVMs);
if (nVMs > 0) {
s_javaVM = vmBuf[0];
(*s_javaVM)->GetEnv(s_javaVM, (void **)&env, JNI_VERSION_1_6);
jniEnv = env;
return;
}
jint jstat;
int debug_port = 0;
JavaVMInitArgs vm_args;
const char *dbp;
int ox = 0;
options[ox++].optionString = getClasspath();
dbp = GetConfigOption("debug.java_port", true, false);
if (dbp != NULL) debug_port = atoi(dbp);
if (debug_port != 0) {
char buf[4096];
sprintf(buf, "-Xrunjdwp:transport=dt_socket,server=y,suspend=%s,address=localhost:%d", debug_port > 0 ? "n" : "y", abs(debug_port)) ;
options[ox++].optionString = "-Xdebug";
options[ox++].optionString = pstrdup(buf);
}
options[ox++].optionString = "-Xrs";
options[ox++].optionString = "-Dsqlj.defaultconnection=jdbc:default:connection";
options[ox++].optionString = "-Djava.awt.headless=true";
{ char buf[4096];
char *pbuf = getPGdir();
sprintf(buf, "-Djava.library.path=%s/../lib", pbuf /*, STRINGIZE2(JLIB_PATH) */ );
options[ox++].optionString = pstrdup(buf);
pfree(pbuf);
}
/* Zapped out -- shouldn't set java.ext.dirs -- breaks things
{
char buf[4096];
char *pbuf = getPGdir();
// If I zap the extdirs -- I need to include the security dir again
// Why do I need to include the class path in the ext dir list?
snprintf(buf, 4096, "-Djava.ext.dirs=%s/../ext:%s/../lib:%s/../../PlugIns/jdk1.7.jdk/Contents/Home/jre/lib/ext",DataDir,pbuf,pbuf);
// options[ox++].optionString = pstrdup(buf);
pfree(pbuf);
}
*/
{ char buf[4096];
snprintf(buf, 4096, "-Djinx.extDir=%s/../ext",DataDir);
options[ox++].optionString=pstrdup(buf);
}
// JVMOptList_add(&optList, "-Xmx256m");
// JVMOptList_add(&optList, "-verbose:jni",0,true);
/* This was not necessary -- the problem was java.ext.dirs
{ char buf[4096];
char *pbuf = getPGdir();
// Why do I need to include the class path in the ext dir list?
snprintf(buf, 4096, "-Djavax.net.ssl.keyStore=%s/../../PlugIns/jdk1.7.jdk/Contents/Home/jre/lib/security/cacerts",pbuf);
options[ox++].optionString = pstrdup(buf);
snprintf(buf, 4096, "-Djavax.net.ssl.trustStore=%s/../../PlugIns/jdk1.7.jdk/Contents/Home/jre/lib/security/cacerts",pbuf);
options[ox++].optionString = pstrdup(buf);
pfree(pbuf);
}
*/
vm_args.version = JNI_VERSION_1_6;
vm_args.options = options;
vm_args.ignoreUnrecognized = JNI_FALSE;
vm_args.nOptions=ox;
jstat = JNI_CreateJavaVM(&s_javaVM, (void **) &env, &vm_args);
jniEnv = env;
if (jstat == JNI_OK && (*env)->ExceptionCheck(env)) {
// jthrowable jt = (*env)->ExceptionOccurred(env);
ereport(ERROR, (errmsg("Java VM threw exception during startup")));
/* if (jt != 0) {
(*env)->ExceptionClear(env);
(*env)->CallVoidMethod(env, jt, printStackTrace);
elogExceptionMessage(env, jt, WARNING);
}
*/
jstat = JNI_ERR;
}
if (jstat != JNI_OK) { ereport(ERROR, (errmsg("Failed to create Java VM"))); }
}