C++ TryCatch::Message方法代码示例

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;
}

/*
 * Tcl proc to embed Javascript
 */
int jsEval(
	ClientData clientData,
	Tcl_Interp *interp,
	int objc,
	Tcl_Obj *const objv[]
){
	v8log("TclBinding::jsEval (interp=%p)\n", interp);

	// Get handle to the V8 Isolate for this Tcl interpreter
	Isolate* isolate  = v8::Isolate::GetCurrent();
	assert(isolate != nullptr);

	// lock the Isolate for multi-threaded access (not reentrant on its own)
	Locker locker(isolate);

	// create a bindings map and store it in the current V8 Isolate
	TclVariableBindingsMap* varbindings = new TclVariableBindingsMap;
	isolate->SetData(0, varbindings);
	v8log("jsEval: created new bindings map at %lp\n", (void*)varbindings );

	// validate input params
	if ( (objc != 3) ) {
		std::string msg("usage: jsEval [list of tcl vars to add to v8 context] { javascript }");
		Tcl_SetObjResult(interp, Tcl_NewStringObj(msg.c_str(), msg.length()));
		return TCL_ERROR;
	}

	// get the argument list
	Tcl_Obj* arglist = objv[1];
	if ( (arglist->typePtr == NULL) || strcmp(arglist->typePtr->name, "list") ) {
		std::string msg("jsEval: 1st arg not a list");
		Tcl_SetObjResult(interp, Tcl_NewStringObj(msg.c_str(), msg.length()));
		return TCL_ERROR;
	}

	// get the JS snippet
	char* javascript = Tcl_GetString(objv[2]);
	if ( strlen(javascript) == 0 ) {
		std::string msg("jsEval: 2nd arg not a string");
		Tcl_SetObjResult(interp, Tcl_NewStringObj(msg.c_str(), msg.length()));
		return TCL_ERROR;
	}

	// Create stack-allocated isolate and handle scopes.
	Isolate::Scope isolate_scope(isolate);
	HandleScope    handle_scope(isolate);

	// new v8 global template
	Handle<ObjectTemplate> global_templ = ObjectTemplate::New(isolate);

	// scrum our F18 Interceptors
	global_templ->SetNamedPropertyHandler(
			&TclVariableBinding::GenericNamedPropertyReader,
			&TclVariableBinding::GenericNamedPropertyWriter
	);

	// Create and Enter a new context for compiling and running the script.
	Handle<Context> context = Context::New(isolate, NULL, global_templ);
	context->Enter();

	int arglistLength;
	Tcl_ListObjLength(interp, arglist, &arglistLength);
	v8log("arg list length == %d\n", arglistLength);

	for ( int i = 0; i < arglistLength; i++ ) {
		// get the variable NAME
		Tcl_Obj* varName;
		Tcl_ListObjIndex(interp, arglist, i, &varName);
		char* vn = Tcl_GetString(varName);
		v8log("binding %s (idx: %d) to V8\n", vn, i);
		// then create a binding  and store it
		(*varbindings)[vn] = new TclVariableBinding(interp, varName);
	}

	// Compile
	v8log("compiling jsEval'ed script\n");
	v8::MaybeLocal<v8::Script> jsSource = v8::Script::Compile(context, Nan::New<String>(javascript).ToLocalChecked());
	if (jsSource.IsEmpty()) {
		v8log("*** jsSource.IsEmpty()\n");
	} else {
		// Run
		v8log("running jsEval'ed script\n");
		Nan::TryCatch tc;
		Nan::MaybeLocal<v8::Value> retv = jsSource.ToLocalChecked()->Run();
		v8log("done running jsEval'ed script\n");
		if ( tc.HasCaught() ) {
			// oops, exception raised from V8 while in JS land
			Local<Message> msg = tc.Message();
			std::string msgtext(*String::Utf8Value(msg->Get()));
			v8log("*** caught JS exception: %s\n", msgtext.c_str());
		}

		TclVariableBindingsMap::const_iterator it;
		for (it = varbindings->begin(); it != varbindings->end(); it++) {
			TclVariableBinding* vb = it->second;
			v8log("reverse mapping of %s (v8: %p) to Tcl...\n", it->first.c_str(), vb->m_v8val);
			Tcl_SetVar2Ex(vb->m_interp, it->first.c_str(), NULL, vb->m_tclvar, 0);
//.........这里部分代码省略.........