/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package websocket.echo;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.Future;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.TimeoutException;
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import javax.websocket.OnMessage;
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import javax.websocket.PongMessage;
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import javax.websocket.Session;
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/**
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* The three annotated echo endpoints can be used to test with Autobahn and
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* the following command "wstest -m fuzzingclient -s servers.json". See the
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* Autobahn documentation for setup and general information.
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*
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* Note: This one is disabled by default since it allocates memory, and needs
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* to be enabled back.
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*/
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//@javax.websocket.server.ServerEndpoint("/websocket/echoAsyncAnnotation")
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public class EchoAsyncAnnotation {
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private static final Future<Void> COMPLETED = new CompletedFuture();
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Future<Void> f = COMPLETED;
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StringBuilder sb = null;
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ByteArrayOutputStream bytes = null;
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@OnMessage
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public void echoTextMessage(Session session, String msg, boolean last) {
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if (sb == null) {
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sb = new StringBuilder();
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}
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sb.append(msg);
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if (last) {
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// Before we send the next message, have to wait for the previous
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// message to complete
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try {
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f.get();
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} catch (InterruptedException | ExecutionException e) {
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// Let the container deal with it
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throw new RuntimeException(e);
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}
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f = session.getAsyncRemote().sendText(sb.toString());
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sb = null;
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}
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}
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@OnMessage
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public void echoBinaryMessage(byte[] msg, Session session, boolean last)
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throws IOException {
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if (bytes == null) {
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bytes = new ByteArrayOutputStream();
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}
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bytes.write(msg);
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if (last) {
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// Before we send the next message, have to wait for the previous
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// message to complete
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try {
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f.get();
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} catch (InterruptedException | ExecutionException e) {
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// Let the container deal with it
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throw new RuntimeException(e);
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}
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f = session.getAsyncRemote().sendBinary(ByteBuffer.wrap(bytes.toByteArray()));
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bytes = null;
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}
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}
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/**
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* Process a received pong. This is a NO-OP.
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*
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* @param pm Ignored.
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*/
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@OnMessage
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public void echoPongMessage(PongMessage pm) {
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// NO-OP
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}
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private static class CompletedFuture implements Future<Void> {
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@Override
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public boolean cancel(boolean mayInterruptIfRunning) {
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return false;
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}
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@Override
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public boolean isCancelled() {
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return false;
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}
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@Override
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public boolean isDone() {
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return true;
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}
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@Override
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public Void get() throws InterruptedException, ExecutionException {
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return null;
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}
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@Override
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public Void get(long timeout, TimeUnit unit)
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throws InterruptedException, ExecutionException,
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TimeoutException {
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return null;
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}
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}
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}
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