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#include "jvm.h"
/*
with javap -s -p <class>
you can get method signatures
This plugin is the core for all of the JVM-based ones
*/
struct uwsgi_jvm ujvm;
struct uwsgi_option uwsgi_jvm_options[] = {
{"jvm-main-class", required_argument, 0, "load the specified class", uwsgi_opt_set_str, &ujvm.class, 0},
{"jvm-classpath", required_argument, 0, "add the specified directory to the classpath", uwsgi_opt_add_string_list, &ujvm.classpath, 0},
{0, 0, 0, 0},
};
int uwsgi_jvm_exception(void) {
if ((*ujvm.env)->ExceptionOccurred(ujvm.env)) {
(*ujvm.env)->ExceptionDescribe(ujvm.env);
(*ujvm.env)->ExceptionClear(ujvm.env);
return 1;
}
return 0;
}
jclass uwsgi_jvm_get_object_class(jobject obj) {
return (*ujvm.env)->GetObjectClass(ujvm.env, obj);
}
jclass uwsgi_jvm_get_class(char *name) {
jclass my_class = (*ujvm.env)->FindClass(ujvm.env, name);
if (uwsgi_jvm_exception()) {
return NULL;
}
return my_class;
}
jmethodID uwsgi_jvm_get_method_id(jclass cls, char *name, char *signature) {
jmethodID mid;
mid = (*ujvm.env)->GetMethodID(ujvm.env, cls, name, signature);
return mid;
}
jmethodID uwsgi_jvm_get_static_method_id(jclass cls, char *name, char *signature) {
jmethodID mid;
mid = (*ujvm.env)->GetStaticMethodID(ujvm.env, cls, name, signature);
return mid;
}
jobject uwsgi_jvm_str_new(char *str, int len) {
jbyteArray ba;
static jmethodID str_new_mid = 0;
if (!str_new_mid) {
str_new_mid = uwsgi_jvm_get_method_id(ujvm.str_class, "<init>", "([BLjava/lang/String;)V");
}
ba = (*ujvm.env)->NewByteArray(ujvm.env, len);
(*ujvm.env)->SetByteArrayRegion(ujvm.env, ba, 0, len, (jbyte *) str);
return (*ujvm.env)->NewObject(ujvm.env, ujvm.str_class, str_new_mid, ba,
(*ujvm.env)->NewStringUTF(ujvm.env, "UTF-8"));
}
jobject uwsgi_jvm_str(char *str) {
return (*ujvm.env)->NewStringUTF(ujvm.env, str);
}
int jvm_init(void) {
jint res;
JavaVM *jvm;
JavaVMInitArgs vm_args;
JavaVMOption options[1];
jmethodID mmid;
char *old_cp = NULL ;
vm_args.version = JNI_VERSION_1_2;
JNI_GetDefaultJavaVMInitArgs(&vm_args);
options[0].optionString = "-Djava.class.path=.";
struct uwsgi_string_list *cp = ujvm.classpath;
while(cp) {
if (old_cp) {
options[0].optionString = uwsgi_concat3(old_cp, ":", cp->value);
free(old_cp);
}
else {
options[0].optionString = uwsgi_concat3(options[0].optionString, ":", cp->value);
}
old_cp = options[0].optionString ;
cp = cp->next;
}
vm_args.options = options;
vm_args.nOptions = 1;
res = JNI_CreateJavaVM(&jvm, (void **) &ujvm.env, &vm_args);
if (res) {
uwsgi_log("unable to initialize JVM\n");
exit(1);
}
uwsgi_log("JVM initialized\n");
if (ujvm.class) {
ujvm.main_class = uwsgi_jvm_get_class(ujvm.class);
if (!ujvm.main_class) {
exit(1);
}
mmid = uwsgi_jvm_get_static_method_id(ujvm.main_class, "main", "([Ljava/lang/String;)V");
if (mmid) {
(*ujvm.env)->CallStaticVoidMethod(ujvm.env, ujvm.main_class, mmid);
uwsgi_jvm_exception();
}
}
ujvm.str_class = uwsgi_jvm_get_class("java/lang/String");
ujvm.ht_class = uwsgi_jvm_get_class("java/util/Hashtable");
ujvm.fd_class = uwsgi_jvm_get_class("java/io/FileDescriptor");
return 1;
}
jobject uwsgi_jvm_array_get(jobject obj, int index) {
return (*ujvm.env)->GetObjectArrayElement(ujvm.env, obj, index);
}
jobject uwsgi_jvm_ht_new() {
static jmethodID htimid = 0;
if (!htimid) {
htimid = uwsgi_jvm_get_method_id(ujvm.ht_class, "<init>", "()V");
}
return (*ujvm.env)->NewObject(ujvm.env, ujvm.ht_class, htimid);
}
jobject uwsgi_jvm_ht_put(jobject obj, jobject key, jobject val) {
static jmethodID htpmid = 0 ;
if (!htpmid) {
htpmid = uwsgi_jvm_get_method_id(ujvm.ht_class, "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
}
return (*ujvm.env)->CallObjectMethod(ujvm.env, obj, htpmid, key, val);
}
jobject uwsgi_jvm_fd(int fd) {
jobject fd_obj;
static jmethodID fd_mid = 0;
static jfieldID fd_field = 0 ;
if (!fd_mid) {
fd_mid = uwsgi_jvm_get_method_id( ujvm.fd_class, "<init>", "()V");
}
fd_obj = (*ujvm.env)->NewObject(ujvm.env, ujvm.fd_class, fd_mid);
if (!fd_field) {
fd_field = (*ujvm.env)->GetFieldID(ujvm.env, ujvm.fd_class, "fd", "I");
}
(*ujvm.env)->SetIntField(ujvm.env, fd_obj, fd_field, fd);
return fd_obj;
}
char *uwsgi_jvm_str2c(jobject obj) {
return (char *) (*ujvm.env)->GetStringUTFChars(ujvm.env, obj, NULL);
}
int uwsgi_jvm_strlen2c(jobject obj) {
return (*ujvm.env)->GetStringUTFLength(ujvm.env, obj);
}
struct uwsgi_plugin jvm_plugin = {
.name = "jvm",
.init = jvm_init,
.options = uwsgi_jvm_options,
};
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