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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.binding.websocket.runtime;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.nio.channels.SocketChannel;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
import org.apache.websocket.WebSocket;
public class WebSocketRequestHandler implements Runnable {
private WebSocket<SocketChannel> websocket;
private WebSocketOperationDispatcher dispatcher;
public WebSocketRequestHandler(WebSocket<SocketChannel> socket, WebSocketOperationDispatcher dispatcher) {
this.websocket = socket;
this.dispatcher = dispatcher;
}
@Override
public void run() {
while (true) {
try {
// TODO use Java NIO selectors on websockets
String request = websocket.receiveText();
String response = handleRequest(request);
websocket.sendText(response);
} catch (IOException e) {
if (!websocket.isOpen()) {
System.out.println("Client disconnected. Stopping WebSocketRequestHandler.");
break;
} else {
throw new RuntimeException(e);
}
}
}
}
// TODO handle request asynchronously in a background thread
private String handleRequest(String jsonRequest) {
WebSocketBindingRequest request = JSONUtil.decodeRequest(jsonRequest);
RuntimeEndpoint wire = dispatcher.getEndpoint(request.getUri());
Operation operation = dispatcher.getOperation(request.getUri());
System.out.println("handleRequest - " + request.getUri() + " - " + wire + " - " + operation);
String jsonParams = request.getPayload();
Object[] args = JSONUtil.decodeJsonParamsForOperation(jsonParams, operation);
try {
Object operationResponse = wire.invoke(operation, args);
String payload = JSONUtil.encodeResponse(operationResponse);
WebSocketBindingResponse response = new WebSocketBindingResponse(request.getRequestId(), payload);
return JSONUtil.encodeResponse(response);
} catch (InvocationTargetException e) {
throw new RuntimeException(e);
}
}
}
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