/*
* 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.tomcat.websocket.pojo;
import java.io.IOException;
import java.net.URI;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import javax.servlet.ServletContextEvent;
import javax.websocket.ClientEndpoint;
import javax.websocket.ContainerProvider;
import javax.websocket.DecodeException;
import javax.websocket.Decoder;
import javax.websocket.DeploymentException;
import javax.websocket.EncodeException;
import javax.websocket.Encoder;
import javax.websocket.Endpoint;
import javax.websocket.EndpointConfig;
import javax.websocket.Extension;
import javax.websocket.MessageHandler;
import javax.websocket.OnMessage;
import javax.websocket.Session;
import javax.websocket.WebSocketContainer;
import javax.websocket.server.ServerContainer;
import javax.websocket.server.ServerEndpoint;
import javax.websocket.server.ServerEndpointConfig;
import org.junit.Assert;
import org.junit.Test;
import org.apache.catalina.Context;
import org.apache.catalina.deploy.ApplicationListener;
import org.apache.catalina.servlets.DefaultServlet;
import org.apache.catalina.startup.Tomcat;
import org.apache.catalina.startup.TomcatBaseTest;
import org.apache.tomcat.websocket.pojo.TesterUtil.ServerConfigListener;
import org.apache.tomcat.websocket.pojo.TesterUtil.SingletonConfigurator;
import org.apache.tomcat.websocket.server.WsContextListener;
public class TestEncodingDecoding extends TomcatBaseTest {
private static final String MESSAGE_ONE = "message-one";
private static final String PATH_PROGRAMMATIC_EP = "/echoProgrammaticEP";
private static final String PATH_ANNOTATED_EP = "/echoAnnotatedEP";
private static final String PATH_GENERICS_EP = "/echoGenericsEP";
@Test
public void testProgrammaticEndPoints() throws Exception{
Tomcat tomcat = getTomcatInstance();
// Must have a real docBase - just use temp
Context ctx =
tomcat.addContext("", System.getProperty("java.io.tmpdir"));
ctx.addApplicationListener(new ApplicationListener(
ProgramaticServerEndpointConfig.class.getName(), false));
Tomcat.addServlet(ctx, "default", new DefaultServlet());
ctx.addServletMapping("/", "default");
WebSocketContainer wsContainer =
ContainerProvider.getWebSocketContainer();
tomcat.start();
Client client = new Client();
URI uri = new URI("ws://localhost:" + getPort() + PATH_PROGRAMMATIC_EP);
Session session = wsContainer.connectToServer(client, uri);
MsgString msg1 = new MsgString();
msg1.setData(MESSAGE_ONE);
session.getBasicRemote().sendObject(msg1);
// Should not take very long
int i = 0;
while (i < 20) {
if (MsgStringMessageHandler.received.size() > 0 &&
client.received.size() > 0) {
break;
}
Thread.sleep(100);
i++;
}
// Check messages were received
Assert.assertEquals(1, MsgStringMessageHandler.received.size());
Assert.assertEquals(1, client.received.size());
// Check correct messages were received
Assert.assertEquals(MESSAGE_ONE,
((MsgString) MsgStringMessageHandler.received.peek()).getData());
Assert.assertEquals(MESSAGE_ONE,
new String(((MsgByte) client.received.peek()).getData()));
session.close();
}
@Test
public void testAnnotatedEndPoints() throws Exception {
// Set up utility classes
Server server = new Server();
SingletonConfigurator.setInstance(server);
ServerConfigListener.setPojoClazz(Server.class);
Tomcat tomcat = getTomcatInstance();
// Must have a real docBase - just use temp
Context ctx =
tomcat.addContext("", System.getProperty("java.io.tmpdir"));
ctx.addApplicationListener(new ApplicationListener(
ServerConfigListener.class.getName(), false));
Tomcat.addServlet(ctx, "default", new DefaultServlet());
ctx.addServletMapping("/", "default");
WebSocketContainer wsContainer =
ContainerProvider.getWebSocketContainer();
tomcat.start();
Client client = new Client();
URI uri = new URI("ws://localhost:" + getPort() + PATH_ANNOTATED_EP);
Session session = wsContainer.connectToServer(client, uri);
MsgString msg1 = new MsgString();
msg1.setData(MESSAGE_ONE);
session.getBasicRemote().sendObject(msg1);
// Should not take very long
int i = 0;
while (i < 20) {
if (server.received.size() > 0 && client.received.size() > 0) {
break;
}
Thread.sleep(100);
}
// Check messages were received
Assert.assertEquals(1, server.received.size());
Assert.assertEquals(1, client.received.size());
// Check correct messages were received
Assert.assertEquals(MESSAGE_ONE,
((MsgString) server.received.peek()).getData());
Assert.assertEquals(MESSAGE_ONE,
((MsgString) client.received.peek()).getData());
session.close();
// Should not take very long but some failures have been seen
i = testEvent(MsgStringEncoder.class.getName()+":init", 0);
i = testEvent(MsgStringDecoder.class.getName()+":init", i);
i = testEvent(MsgByteEncoder.class.getName()+":init", i);
i = testEvent(MsgByteDecoder.class.getName()+":init", i);
i = testEvent(MsgStringEncoder.class.getName()+":destroy", i);
i = testEvent(MsgStringDecoder.class.getName()+":destroy", i);
i = testEvent(MsgByteEncoder.class.getName()+":destroy", i);
i = testEvent(MsgByteDecoder.class.getName()+":destroy", i);
}
@Test
public void testGenericsCoders() throws Exception {
// Set up utility classes
GenericsServer server = new GenericsServer();
SingletonConfigurator.setInstance(server);
ServerConfigListener.setPojoClazz(GenericsServer.class);
Tomcat tomcat = getTomcatInstance();
// Must have a real docBase - just use temp
Context ctx =
tomcat.addContext("", System.getProperty("java.io.tmpdir"));
ctx.addApplicationListener(new ApplicationListener(
ServerConfigListener.class.getName(), false));
Tomcat.addServlet(ctx, "default", new DefaultServlet());
ctx.addServletMapping("/", "default");
WebSocketContainer wsContainer =
ContainerProvider.getWebSocketContainer();
tomcat.start();
GenericsClient client = new GenericsClient();
URI uri = new URI("ws://localhost:" + getPort() + PATH_GENERICS_EP);
Session session = wsContainer.connectToServer(client, uri);
ArrayList<String> list = new ArrayList<String>(2);
list.add("str1");
list.add("str2");
session.getBasicRemote().sendObject(list);
// Should not take very long
int i = 0;
while (i < 20) {
if (server.received.size() > 0 && client.received.size() > 0) {
break;
}
Thread.sleep(100);
}
// Check messages were received
Assert.assertEquals(1, server.received.size());
Assert.assertEquals(server.received.peek().toString(), "[str1, str2]");
Assert.assertEquals(1, client.received.size());
Assert.assertEquals(client.received.peek().toString(), "[str1, str2]");
session.close();
}
private int testEvent(String name, int count) throws InterruptedException {
int i = count;
while (i < 50) {
if (Server.isLifeCycleEventCalled(name)) {
break;
}
i++;
Thread.sleep(100);
}
Assert.assertTrue(Server.isLifeCycleEventCalled(name));
return i;
}
@ClientEndpoint(decoders={ListStringDecoder.class},
encoders={ListStringEncoder.class})
public static class GenericsClient {
private Queue<Object> received = new ConcurrentLinkedQueue<Object>();
@OnMessage
public void rx(List<String> in) {
received.add(in);
}
}
@ClientEndpoint(decoders={MsgStringDecoder.class, MsgByteDecoder.class},
encoders={MsgStringEncoder.class, MsgByteEncoder.class})
public static class Client {
private Queue<Object> received = new ConcurrentLinkedQueue<Object>();
@OnMessage
public void rx(MsgString in) {
received.add(in);
}
@OnMessage
public void rx(MsgByte in) {
received.add(in);
}
}
@ServerEndpoint(value=PATH_GENERICS_EP,
decoders={ListStringDecoder.class},
encoders={ListStringEncoder.class},
configurator=SingletonConfigurator.class)
public static class GenericsServer {
private Queue<Object> received = new ConcurrentLinkedQueue<Object>();
@OnMessage
public List<String> rx(List<String> in) {
received.add(in);
// Echo the message back
return in;
}
}
@ServerEndpoint(value=PATH_ANNOTATED_EP,
decoders={MsgStringDecoder.class, MsgByteDecoder.class},
encoders={MsgStringEncoder.class, MsgByteEncoder.class},
configurator=SingletonConfigurator.class)
public static class Server {
private Queue<Object> received = new ConcurrentLinkedQueue<Object>();
static HashMap<String, Boolean> lifeCyclesCalled = new HashMap<String, Boolean>(8);
@OnMessage
public MsgString rx(MsgString in) {
received.add(in);
// Echo the message back
return in;
}
@OnMessage
public MsgByte rx(MsgByte in) {
received.add(in);
// Echo the message back
return in;
}
public static void addLifeCycleEvent(String event){
lifeCyclesCalled.put(event, Boolean.TRUE);
}
public static boolean isLifeCycleEventCalled(String event){
Boolean called = lifeCyclesCalled.get(event);
return called == null ? false : called.booleanValue();
}
}
public static class MsgByteMessageHandler implements
MessageHandler.Whole<MsgByte> {
public static Queue<Object> received = new ConcurrentLinkedQueue<Object>();
private final Session session;
public MsgByteMessageHandler(Session session) {
this.session = session;
}
@Override
public void onMessage(MsgByte in) {
System.out.println(getClass() + " received");
received.add(in);
try {
MsgByte msg = new MsgByte();
msg.setData("got it".getBytes());
session.getBasicRemote().sendObject(msg);
} catch (IOException e) {
throw new IllegalStateException(e);
} catch (EncodeException e) {
throw new IllegalStateException(e);
}
}
}
public static class MsgStringMessageHandler
implements MessageHandler.Whole<MsgString>{
public static Queue<Object> received = new ConcurrentLinkedQueue<Object>();
private final Session session;
public MsgStringMessageHandler(Session session) {
this.session = session;
}
@Override
public void onMessage(MsgString in) {
received.add(in);
try {
MsgByte msg = new MsgByte();
msg.setData(MESSAGE_ONE.getBytes());
session.getBasicRemote().sendObject(msg);
} catch (IOException e) {
e.printStackTrace();
} catch (EncodeException e) {
e.printStackTrace();
}
}
}
public static class ProgrammaticEndpoint extends Endpoint {
@Override
public void onOpen(Session session, EndpointConfig config) {
session.addMessageHandler(new MsgStringMessageHandler(session));
}
}
public static class MsgString {
private String data;
public String getData() { return data; }
public void setData(String data) { this.data = data; }
}
public static class MsgStringEncoder implements Encoder.Text<MsgString> {
@Override
public void init(EndpointConfig endpointConfig) {
Server.addLifeCycleEvent(getClass().getName() + ":init");
}
@Override
public void destroy() {
Server.addLifeCycleEvent(getClass().getName() + ":destroy");
}
@Override
public String encode(MsgString msg) throws EncodeException {
return "MsgString:" + msg.getData();
}
}
public static class MsgStringDecoder implements Decoder.Text<MsgString> {
@Override
public void init(EndpointConfig endpointConfig) {
Server.addLifeCycleEvent(getClass().getName() + ":init");
}
@Override
public void destroy() {
Server.addLifeCycleEvent(getClass().getName() + ":destroy");
}
@Override
public MsgString decode(String s) throws DecodeException {
MsgString result = new MsgString();
result.setData(s.substring(10));
return result;
}
@Override
public boolean willDecode(String s) {
return s.startsWith("MsgString:");
}
}
public static class MsgByte {
private byte[] data;
public byte[] getData() { return data; }
public void setData(byte[] data) { this.data = data; }
}
public static class MsgByteEncoder implements Encoder.Binary<MsgByte> {
@Override
public void init(EndpointConfig endpointConfig) {
Server.addLifeCycleEvent(getClass().getName() + ":init");
}
@Override
public void destroy() {
Server.addLifeCycleEvent(getClass().getName() + ":destroy");
}
@Override
public ByteBuffer encode(MsgByte msg) throws EncodeException {
byte[] data = msg.getData();
ByteBuffer reply = ByteBuffer.allocate(2 + data.length);
reply.put((byte) 0x12);
reply.put((byte) 0x34);
reply.put(data);
reply.flip();
return reply;
}
}
public static class MsgByteDecoder implements Decoder.Binary<MsgByte> {
@Override
public void init(EndpointConfig endpointConfig) {
Server.addLifeCycleEvent(getClass().getName() + ":init");
}
@Override
public void destroy() {
Server.addLifeCycleEvent(getClass().getName() + ":destroy");
}
@Override
public MsgByte decode(ByteBuffer bb) throws DecodeException {
MsgByte result = new MsgByte();
byte[] data = new byte[bb.limit() - bb.position()];
bb.get(data);
result.setData(data);
return result;
}
@Override
public boolean willDecode(ByteBuffer bb) {
bb.mark();
if (bb.get() == 0x12 && bb.get() == 0x34) {
return true;
}
bb.reset();
return false;
}
}
public static class ListStringEncoder implements Encoder.Text<List<String>> {
@Override
public void init(EndpointConfig endpointConfig) {
Server.addLifeCycleEvent(getClass().getName() + ":init");
}
@Override
public void destroy() {
Server.addLifeCycleEvent(getClass().getName() + ":destroy");
}
@Override
public String encode(List<String> str) throws EncodeException {
StringBuffer sbuf = new StringBuffer();
sbuf.append("[");
for (String s: str){
sbuf.append(s).append(",");
}
sbuf.deleteCharAt(sbuf.lastIndexOf(",")).append("]");
return sbuf.toString();
}
}
public static class ListStringDecoder implements Decoder.Text<List<String>> {
@Override
public void init(EndpointConfig endpointConfig) {
Server.addLifeCycleEvent(getClass().getName() + ":init");
}
@Override
public void destroy() {
Server.addLifeCycleEvent(getClass().getName() + ":destroy");
}
@Override
public List<String> decode(String str) throws DecodeException {
List<String> lst = new ArrayList<String>(1);
str = str.substring(1,str.length()-1);
String[] strings = str.split(",");
for (String t : strings){
lst.add(t);
}
return lst;
}
@Override
public boolean willDecode(String str) {
return str.startsWith("[") && str.endsWith("]");
}
}
public static class ProgramaticServerEndpointConfig extends WsContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
super.contextInitialized(sce);
ServerContainer sc =
(ServerContainer) sce.getServletContext().getAttribute(
org.apache.tomcat.websocket.server.Constants.
SERVER_CONTAINER_SERVLET_CONTEXT_ATTRIBUTE);
try {
sc.addEndpoint(new ServerEndpointConfig() {
@Override
public Map<String, Object> getUserProperties() {
return Collections.emptyMap();
}
@Override
public List<Class<? extends Encoder>> getEncoders() {
List<Class<? extends Encoder>> encoders = new ArrayList<Class<? extends Encoder>>(2);
encoders.add(MsgStringEncoder.class);
encoders.add(MsgByteEncoder.class);
return encoders;
}
@Override
public List<Class<? extends Decoder>> getDecoders() {
List<Class<? extends Decoder>> decoders = new ArrayList<Class<? extends Decoder>>(2);
decoders.add(MsgStringDecoder.class);
decoders.add(MsgByteDecoder.class);
return decoders;
}
@Override
public List<String> getSubprotocols() {
return Collections.emptyList();
}
@Override
public String getPath() {
return PATH_PROGRAMMATIC_EP;
}
@Override
public List<Extension> getExtensions() {
return Collections.emptyList();
}
@Override
public Class<?> getEndpointClass() {
return ProgrammaticEndpoint.class;
}
@Override
public Configurator getConfigurator() {
return new ServerEndpointConfig.Configurator() {
};
}
});
} catch (DeploymentException e) {
throw new IllegalStateException(e);
}
}
}
}