/**
* 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.hadoop.gateway.websockets;
import java.io.IOException;
import java.net.URI;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import javax.websocket.CloseReason;
import javax.websocket.ContainerProvider;
import javax.websocket.WebSocketContainer;
import org.apache.hadoop.gateway.websockets.BigEchoSocketHandler;
import org.eclipse.jetty.io.RuntimeIOException;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.server.handler.ContextHandler;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.websocket.api.BatchMode;
import org.eclipse.jetty.websocket.api.RemoteEndpoint;
import org.eclipse.jetty.websocket.api.Session;
import org.eclipse.jetty.websocket.api.StatusCode;
import org.eclipse.jetty.websocket.api.WebSocketAdapter;
import org.hamcrest.CoreMatchers;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
/**
* Test to simulate unexpected connection drop. Here we establish a connection
* and then try to simulate an error.
*
* @since 0.10
*
*/
public class ConnectionDroppedTest {
private static Server backend;
private static ServerConnector connector;
private static URI serverUri;
/* Proxy */
private static Server proxy;
private static ServerConnector proxyConnector;
private static URI proxyUri;
public ConnectionDroppedTest() {
super();
}
@BeforeClass
public static void startServer() throws Exception {
startBackend();
startProxy();
}
@AfterClass
public static void stopServer() throws Exception {
/* ORDER MATTERS ! */
proxy.stop();
backend.stop();
}
/**
* The connection is dropped, so we should see a tineout exception when we try
* to poll the message from queue.
*
* @throws IOException
* @throws Exception
*/
@Test(expected = java.util.concurrent.TimeoutException.class)
public void testDroppedConnection() throws IOException, Exception {
final String message = "Echo";
WebSocketContainer container = ContainerProvider.getWebSocketContainer();
WebsocketClient client = new WebsocketClient();
javax.websocket.Session session = container.connectToServer(client,
proxyUri);
session.getBasicRemote().sendText(message);
client.messageQueue.awaitMessages(1, 1000, TimeUnit.MILLISECONDS);
}
private static void startBackend() throws Exception {
backend = new Server();
connector = new ServerConnector(backend);
backend.addConnector(connector);
/* start backend with Echo socket */
final BigEchoSocketHandler wsHandler = new BigEchoSocketHandler(
new BadSocket());
ContextHandler context = new ContextHandler();
context.setContextPath("/");
context.setHandler(wsHandler);
backend.setHandler(context);
// Start Server
backend.start();
String host = connector.getHost();
if (host == null) {
host = "localhost";
}
int port = connector.getLocalPort();
serverUri = new URI(String.format("ws://%s:%d/", host, port));
}
private static void startProxy() throws Exception {
proxy = new Server();
proxyConnector = new ServerConnector(proxy);
proxy.addConnector(proxyConnector);
/* start Knox with WebsocketAdapter to test */
final BigEchoSocketHandler wsHandler = new BigEchoSocketHandler(
new ProxyWebSocketAdapter(serverUri, Executors.newFixedThreadPool(10)));
ContextHandler context = new ContextHandler();
context.setContextPath("/");
context.setHandler(wsHandler);
proxy.setHandler(context);
// Start Server
proxy.start();
String host = proxyConnector.getHost();
if (host == null) {
host = "localhost";
}
int port = proxyConnector.getLocalPort();
proxyUri = new URI(String.format("ws://%s:%d/", host, port));
}
}
/**
*
* Simulate a bad socket.
*
* @since 0.10
*/
class BadSocket extends WebSocketAdapter {
private Session session;
@Override
public void onWebSocketConnect(final Session session) {
this.session = session;
}
@Override
public void onWebSocketBinary(byte[] payload, int offset, int len) {
if (isNotConnected())
return;
try {
RemoteEndpoint remote = getRemote();
remote.sendBytes(BufferUtil.toBuffer(payload, offset, len), null);
if (remote.getBatchMode() == BatchMode.ON)
remote.flush();
} catch (IOException x) {
throw new RuntimeIOException(x);
}
}
@Override
public void onWebSocketError(Throwable cause) {
throw new RuntimeException(cause);
}
@Override
public void onWebSocketText(String message) {
if (isNotConnected())
return;
// Throw an exception on purpose
throw new RuntimeException("Simulating bad connection ...");
}
}