JNIEXPORT jobject JNICALL Java_node_NodeDynamicProxyClass_callJs(JNIEnv *env, jobject src, jlong ptr, jobject method, jobjectArray args) {
threadId myThreadId = my_getThreadId();
bool hasArgsGlobalRef = false;
// args needs to be global, you can't send env across thread boundaries
DynamicProxyData* dynamicProxyData = (DynamicProxyData*)ptr;
dynamicProxyData->args = args;
dynamicProxyData->done = false;
dynamicProxyData->result = NULL;
dynamicProxyData->throwableClass = "";
dynamicProxyData->throwableMessage = "";
jclass methodClazz = env->FindClass("java/lang/reflect/Method");
jmethodID method_getName = env->GetMethodID(methodClazz, "getName", "()Ljava/lang/String;");
dynamicProxyData->methodName = javaObjectToString(env, env->CallObjectMethod(method, method_getName));
assertNoException(env);
uv_work_t* req = new uv_work_t();
req->data = dynamicProxyData;
if(v8ThreadIdEquals(myThreadId, v8ThreadId)) {
#if NODE_MINOR_VERSION >= 10
EIO_AfterCallJs(req, 0);
#else
EIO_AfterCallJs(req);
#endif
} else {
if (args) {
// if args is not null and we have to kick this across the thread boundary, make it a global ref
dynamicProxyData->args = (jobjectArray) env->NewGlobalRef(args);
hasArgsGlobalRef = true;
}
uv_queue_work(uv_default_loop(), req, EIO_CallJs, (uv_after_work_cb)EIO_AfterCallJs);
while(!dynamicProxyData->done) {
my_sleep(100);
}
}
if(!dynamicProxyDataVerify(dynamicProxyData)) {
throwNewThrowable(env, "java/lang/IllegalStateException", "dynamicProxyData was corrupted");
}
if(hasArgsGlobalRef) {
env->DeleteGlobalRef(dynamicProxyData->args);
}
if (dynamicProxyData->done == DYNAMIC_PROXY_JS_ERROR) {
throwNewThrowable(env, dynamicProxyData->throwableClass.c_str(), dynamicProxyData->throwableMessage);
}
jobject result = NULL;
if(dynamicProxyData->result) {
// need to retain a local ref so that we can return it, otherwise the returned object gets corrupted
result = env->NewLocalRef(dynamicProxyData->result);
env->DeleteGlobalRef(dynamicProxyData->result);
}
return result;
}
jobject v8ToJava_javaObject(JNIEnv* env, v8::Local<v8::Object> obj) {
JavaObject* javaObject = node::ObjectWrap::Unwrap<JavaObject>(obj);
jobject jobj = javaObject->getObject();
jclass nodeDynamicProxyClass = env->FindClass("node/NodeDynamicProxyClass");
if(env->IsInstanceOf(jobj, nodeDynamicProxyClass)) {
jfieldID ptrField = env->GetFieldID(nodeDynamicProxyClass, "ptr", "J");
DynamicProxyData* proxyData = (DynamicProxyData*)(long)env->GetLongField(jobj, ptrField);
if(!dynamicProxyDataVerify(proxyData)) {
return NULL;
}
jclass dynamicInterface = javaFindClass(env, proxyData->interfaceName);
if(dynamicInterface == NULL) {
printf("Could not find interface %s\n", proxyData->interfaceName.c_str());
return NULL;
}
jclass classClazz = env->FindClass("java/lang/Class");
jobjectArray classArray = env->NewObjectArray(1, classClazz, NULL);
env->SetObjectArrayElement(classArray, 0, dynamicInterface);
jmethodID class_getClassLoader = env->GetMethodID(classClazz, "getClassLoader", "()Ljava/lang/ClassLoader;");
jobject classLoader = env->CallObjectMethod(dynamicInterface, class_getClassLoader);
if(classLoader == NULL) {
jclass objectClazz = env->FindClass("java/lang/Object");
jmethodID object_getClass = env->GetMethodID(objectClazz, "getClass", "()Ljava/lang/Class;");
jobject jobjClass = env->CallObjectMethod(jobj, object_getClass);
classLoader = env->CallObjectMethod(jobjClass, class_getClassLoader);
}
jclass proxyClass = env->FindClass("java/lang/reflect/Proxy");
jmethodID proxy_newProxyInstance = env->GetStaticMethodID(proxyClass, "newProxyInstance", "(Ljava/lang/ClassLoader;[Ljava/lang/Class;Ljava/lang/reflect/InvocationHandler;)Ljava/lang/Object;");
if(classLoader == NULL) {
printf("Could not get classloader for Proxy\n");
return NULL;
}
if(classArray == NULL) {
printf("Could not create class array for Proxy\n");
return NULL;
}
if(jobj == NULL) {
printf("Not a valid object to wrap\n");
return NULL;
}
jobj = env->CallStaticObjectMethod(proxyClass, proxy_newProxyInstance, classLoader, classArray, jobj);
}
return jobj;
}
JavaObject::~JavaObject() {
JNIEnv *env = m_java->getJavaEnv();
jclass nodeDynamicProxyClass = env->FindClass("node/NodeDynamicProxyClass");
if(env->IsInstanceOf(m_obj, nodeDynamicProxyClass)) {
jfieldID ptrField = env->GetFieldID(nodeDynamicProxyClass, "ptr", "J");
DynamicProxyData* proxyData = (DynamicProxyData*)(long)env->GetLongField(m_obj, ptrField);
if(dynamicProxyDataVerify(proxyData)) {
delete proxyData;
}
}
env->DeleteGlobalRef(m_obj);
env->DeleteGlobalRef(m_class);
}
void EIO_AfterCallJs(uv_work_t* req, int status) {
#else
void EIO_AfterCallJs(uv_work_t* req) {
#endif
DynamicProxyData* dynamicProxyData = static_cast<DynamicProxyData*>(req->data);
if(!dynamicProxyDataVerify(dynamicProxyData)) {
return;
}
dynamicProxyData->result = NULL;
JNIEnv* env;
int ret = dynamicProxyData->java->getJvm()->GetEnv((void**)&env, JNI_BEST_VERSION);
if (ret != JNI_OK) {
dynamicProxyData->throwableClass = "java/lang/IllegalStateException";
dynamicProxyData->throwableMessage = "Could not retrieve JNIEnv: jvm->GetEnv returned " + to_string<int>(ret);
dynamicProxyData->done = DYNAMIC_PROXY_JS_ERROR;
return;
}
Nan::HandleScope scope;
v8::Array* v8Args;
v8::Function* fn;
v8::Handle<v8::Value>* argv;
int argc;
int i;
v8::Local<v8::Value> v8Result;
jobject javaResult;
v8::Local<v8::Object> dynamicProxyDataFunctions = Nan::New(dynamicProxyData->functions);
v8::Local<v8::Value> fnObj = dynamicProxyDataFunctions->Get(Nan::New<v8::String>(dynamicProxyData->methodName.c_str()).ToLocalChecked());
if(fnObj->IsUndefined() || fnObj->IsNull()) {
dynamicProxyData->throwableClass = "java/lang/NoSuchMethodError";
dynamicProxyData->throwableMessage = "Could not find js function " + dynamicProxyData->methodName;
dynamicProxyData->done = DYNAMIC_PROXY_JS_ERROR;
return;
}
if(!fnObj->IsFunction()) {
dynamicProxyData->throwableClass = "java/lang/IllegalStateException";
dynamicProxyData->throwableMessage = dynamicProxyData->methodName + " is not a function";
dynamicProxyData->done = DYNAMIC_PROXY_JS_ERROR;
return;
}
fn = v8::Function::Cast(*fnObj);
if(dynamicProxyData->args) {
v8Args = v8::Array::Cast(*javaArrayToV8(dynamicProxyData->java, env, dynamicProxyData->args));
argc = v8Args->Length();
} else {
argc = 0;
}
argv = new v8::Handle<v8::Value>[argc];
for(i=0; i<argc; i++) {
argv[i] = v8Args->Get(i);
}
Nan::TryCatch tryCatch;
tryCatch.SetCaptureMessage(true);
v8Result = fn->Call(dynamicProxyDataFunctions, argc, argv);
delete[] argv;
if (tryCatch.HasCaught()) {
dynamicProxyData->throwableClass = "node/NodeJsException";
v8::String::Utf8Value message(tryCatch.Message()->Get());
dynamicProxyData->throwableMessage = std::string(*message);
tryCatch.Reset();
dynamicProxyData->done = DYNAMIC_PROXY_JS_ERROR;
return;
}
if(!dynamicProxyDataVerify(dynamicProxyData)) {
return;
}
javaResult = v8ToJava(env, v8Result);
if(javaResult == NULL) {
dynamicProxyData->result = NULL;
} else {
dynamicProxyData->result = env->NewGlobalRef(javaResult);
}
dynamicProxyData->done = true;
}
