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ConcurrentModificationException when using broadcast (#902)
ConcurrentModificationException when using broadcast
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src/test/java/org/java_websocket/issues/Issue879Test.java
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/* | ||
* Copyright (c) 2010-2019 Nathan Rajlich | ||
* | ||
* Permission is hereby granted, free of charge, to any person | ||
* obtaining a copy of this software and associated documentation | ||
* files (the "Software"), to deal in the Software without | ||
* restriction, including without limitation the rights to use, | ||
* copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the | ||
* Software is furnished to do so, subject to the following | ||
* conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be | ||
* included in all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES | ||
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | ||
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | ||
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | ||
* OTHER DEALINGS IN THE SOFTWARE. | ||
* | ||
*/ | ||
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package org.java_websocket.issues; | ||
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import org.java_websocket.WebSocket; | ||
import org.java_websocket.client.WebSocketClient; | ||
import org.java_websocket.handshake.ClientHandshake; | ||
import org.java_websocket.handshake.ServerHandshake; | ||
import org.java_websocket.server.WebSocketServer; | ||
import org.java_websocket.util.SocketUtil; | ||
import org.junit.Test; | ||
import org.junit.runner.RunWith; | ||
import org.junit.runners.Parameterized; | ||
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import java.io.IOException; | ||
import java.net.BindException; | ||
import java.net.InetSocketAddress; | ||
import java.net.URI; | ||
import java.net.URISyntaxException; | ||
import java.nio.ByteBuffer; | ||
import java.util.ArrayList; | ||
import java.util.Collection; | ||
import java.util.ConcurrentModificationException; | ||
import java.util.List; | ||
import java.util.concurrent.CountDownLatch; | ||
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import static org.junit.Assert.assertFalse; | ||
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@RunWith(Parameterized.class) | ||
public class Issue879Test { | ||
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private static final int NUMBER_OF_TESTS = 20; | ||
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@Parameterized.Parameter | ||
public int numberOfConnections; | ||
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@Test(timeout= 10000) | ||
public void QuickStopTest() throws IOException, InterruptedException, URISyntaxException { | ||
final boolean[] wasBindException = {false}; | ||
final boolean[] wasConcurrentException = new boolean[1]; | ||
final CountDownLatch countDownLatch = new CountDownLatch(1); | ||
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class SimpleServer extends WebSocketServer { | ||
public SimpleServer(InetSocketAddress address) { | ||
super(address); | ||
} | ||
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@Override | ||
public void onOpen(WebSocket conn, ClientHandshake handshake) { | ||
broadcast("new connection: " + handshake.getResourceDescriptor()); //This method sends a message to all clients connected | ||
} | ||
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@Override | ||
public void onClose(WebSocket conn, int code, String reason, boolean remote) { | ||
} | ||
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@Override | ||
public void onMessage(WebSocket conn, String message) { | ||
} | ||
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@Override | ||
public void onMessage(WebSocket conn, ByteBuffer message) { | ||
} | ||
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@Override | ||
public void onError(WebSocket conn, Exception ex) { | ||
if (ex instanceof BindException) { | ||
wasBindException[0] = true; | ||
} | ||
if (ex instanceof ConcurrentModificationException) { | ||
wasConcurrentException[0] = true; | ||
} | ||
} | ||
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@Override | ||
public void onStart() { | ||
countDownLatch.countDown(); | ||
} | ||
} | ||
int port = SocketUtil.getAvailablePort(); | ||
SimpleServer serverA = new SimpleServer(new InetSocketAddress( port)); | ||
SimpleServer serverB = new SimpleServer(new InetSocketAddress( port)); | ||
serverA.start(); | ||
countDownLatch.await(); | ||
List<WebSocketClient> clients = startNewConnections(numberOfConnections, port); | ||
Thread.sleep(100); | ||
int numberOfConnected = 0; | ||
for (WebSocketClient client : clients) { | ||
if (client.isOpen()) | ||
numberOfConnected++; | ||
} | ||
// Number will differ since we use connect instead of connectBlocking | ||
// System.out.println(numberOfConnected + " " + numberOfConnections); | ||
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serverA.stop(); | ||
serverB.start(); | ||
clients.clear(); | ||
assertFalse("There was a BindException", wasBindException[0]); | ||
assertFalse("There was a ConcurrentModificationException", wasConcurrentException[0]); | ||
} | ||
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@Parameterized.Parameters | ||
public static Collection<Integer[]> data() { | ||
List<Integer[]> ret = new ArrayList<Integer[]>(NUMBER_OF_TESTS); | ||
for (int i = 0; i < NUMBER_OF_TESTS; i++) ret.add(new Integer[]{25+ i*25}); | ||
return ret; | ||
} | ||
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private List<WebSocketClient> startNewConnections(int numberOfConnections, int port) throws URISyntaxException, InterruptedException { | ||
List<WebSocketClient> clients = new ArrayList<WebSocketClient>(numberOfConnections); | ||
for (int i = 0; i < numberOfConnections; i++) { | ||
WebSocketClient client = new SimpleClient(new URI("ws://localhost:" + port)); | ||
client.connect(); | ||
Thread.sleep(1); | ||
clients.add(client); | ||
} | ||
return clients; | ||
} | ||
class SimpleClient extends WebSocketClient { | ||
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public SimpleClient(URI serverUri) { | ||
super(serverUri); | ||
} | ||
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@Override | ||
public void onOpen(ServerHandshake handshakedata) { | ||
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} | ||
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@Override | ||
public void onMessage(String message) { | ||
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} | ||
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@Override | ||
public void onClose(int code, String reason, boolean remote) { | ||
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} | ||
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@Override | ||
public void onError(Exception ex) { | ||
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} | ||
} | ||
} |