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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 websocket.echo;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import javax.websocket.OnMessage;
import javax.websocket.PongMessage;
import javax.websocket.Session;
/**
* The three annotated echo endpoints can be used to test with Autobahn and
* the following command "wstest -m fuzzingclient -s servers.json". See the
* Autobahn documentation for setup and general information.
*
* Note: This one is disabled by default since it allocates memory, and needs
* to be enabled back.
*/
//@javax.websocket.server.ServerEndpoint("/websocket/echoAsyncAnnotation")
public class EchoAsyncAnnotation {
private static final Future<Void> COMPLETED = new CompletedFuture();
Future<Void> f = COMPLETED;
StringBuilder sb = null;
ByteArrayOutputStream bytes = null;
@OnMessage
public void echoTextMessage(Session session, String msg, boolean last) {
if (sb == null) {
sb = new StringBuilder();
}
sb.append(msg);
if (last) {
// Before we send the next message, have to wait for the previous
// message to complete
try {
f.get();
} catch (InterruptedException | ExecutionException e) {
// Let the container deal with it
throw new RuntimeException(e);
}
f = session.getAsyncRemote().sendText(sb.toString());
sb = null;
}
}
@OnMessage
public void echoBinaryMessage(byte[] msg, Session session, boolean last)
throws IOException {
if (bytes == null) {
bytes = new ByteArrayOutputStream();
}
bytes.write(msg);
if (last) {
// Before we send the next message, have to wait for the previous
// message to complete
try {
f.get();
} catch (InterruptedException | ExecutionException e) {
// Let the container deal with it
throw new RuntimeException(e);
}
f = session.getAsyncRemote().sendBinary(ByteBuffer.wrap(bytes.toByteArray()));
bytes = null;
}
}
/**
* Process a received pong. This is a NO-OP.
*
* @param pm Ignored.
*/
@OnMessage
public void echoPongMessage(PongMessage pm) {
// NO-OP
}
private static class CompletedFuture implements Future<Void> {
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
return false;
}
@Override
public boolean isCancelled() {
return false;
}
@Override
public boolean isDone() {
return true;
}
@Override
public Void get() throws InterruptedException, ExecutionException {
return null;
}
@Override
public Void get(long timeout, TimeUnit unit)
throws InterruptedException, ExecutionException,
TimeoutException {
return null;
}
}
}
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