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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.net.URI;
import java.net.URISyntaxException;
import java.nio.channels.SocketChannel;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.provider.ServiceBindingProvider;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
import org.apache.websocket.ServerWebSocket;
import org.apache.websocket.WebSocket;
import org.apache.websocket.WebSocketApplication;
import org.apache.websocket.WebSocketException;
public class WebsocketServiceBindingProvider implements ServiceBindingProvider {
private RuntimeEndpoint endpoint;
private static ConcurrentMap<String, ServerWebSocket> websocketServers = new ConcurrentHashMap<String, ServerWebSocket>();
public WebsocketServiceBindingProvider(RuntimeEndpoint endpoint) {
this.endpoint = endpoint;
}
public void start() {
String uri = endpoint.getBinding().getURI();
ServerWebSocket server = initWebSocketServerForURI(uri);
String component = endpoint.getComponent().getName();
String service = endpoint.getService().getName();
for (Operation op : getBindingInterfaceContract().getInterface().getOperations()) {
String operation = op.getName();
server.register("/" + component + "/" + service + "/" + operation, new WebSocketEndpoint(endpoint, op));
System.out.println("Registered websocket endpoint for /" + component + "/" + service + "/" + operation);
}
}
private ServerWebSocket initWebSocketServerForURI(String uri) {
ServerWebSocket server = websocketServers.get(uri);
if (server == null) {
try {
server = new ServerWebSocket(new URI(uri));
websocketServers.put(uri, server);
System.out.println("Starting websocket server at " + uri + "...");
new Thread(server).start();
} catch (IOException e) {
throw new RuntimeException(e);
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
}
return server;
}
public void stop() {
if (websocketServers != null) {
for (ServerWebSocket server : websocketServers.values()) {
try {
server.close();
} catch (IOException e) {
e.printStackTrace();
}
}
websocketServers.clear();
websocketServers = null;
}
}
public InterfaceContract getBindingInterfaceContract() {
return endpoint.getService().getInterfaceContract();
}
public boolean supportsOneWayInvocation() {
return false;
}
public class WebSocketEndpoint implements WebSocketApplication<SocketChannel> {
private RuntimeEndpoint endpoint;
private Operation operation;
public WebSocketEndpoint(RuntimeEndpoint endpoint, Operation operation) {
this.endpoint = endpoint;
this.operation = operation;
}
@Override
public void onConnection(WebSocket<SocketChannel> socket) {
// handle request in a non-blocking fashion releasing the server
// thread
new Thread(new WebsocketServiceInvoker(endpoint, operation, socket)).start();
}
@Override
public void onHandshakeError(IOException e) {
System.out.println("Handshake error!\n");
e.printStackTrace();
}
@Override
public String acceptProtocol(String protocol) {
// don't accept any subprotocols
return null;
}
@Override
public boolean acceptOrigin(String origin) {
// accept all clients
return true;
}
@Override
public Map<String, String> acceptExtensions(Map<String, String> headers) throws WebSocketException {
// don't accept any extensions
return null;
}
}
}
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