//
// ========================================================================
// Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.jsr356.server;
import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.CoreMatchers.hasItem;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.CoreMatchers.startsWith;
import static org.junit.Assert.assertThat;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.net.HttpURLConnection;
import java.net.URI;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.websocket.ContainerProvider;
import javax.websocket.Endpoint;
import javax.websocket.EndpointConfig;
import javax.websocket.OnMessage;
import javax.websocket.Session;
import javax.websocket.WebSocketContainer;
import javax.websocket.server.ServerEndpoint;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.util.IO;
import org.eclipse.jetty.websocket.api.util.WSURI;
import org.eclipse.jetty.websocket.jsr356.ClientContainer;
import org.eclipse.jetty.websocket.jsr356.JettyClientContainerProvider;
import org.eclipse.jetty.websocket.jsr356.server.deploy.WebSocketServerContainerInitializer;
import org.junit.Before;
import org.junit.Test;
public class DelayedStartClientOnServerTest
{
@ServerEndpoint("/echo")
public static class EchoSocket
{
@OnMessage
public String echo(String msg)
{
return msg;
}
}
@Before
public void stopClientContainer() throws Exception
{
JettyClientContainerProvider.stop();
}
/**
* Using the Client specific techniques of JSR356, connect to the echo socket
* and perform an echo request.
*/
public static class ClientConnectServlet extends HttpServlet
{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
// Client specific technique
WebSocketContainer container = ContainerProvider.getWebSocketContainer();
try
{
URI wsURI = WSURI.toWebsocket(req.getRequestURL()).resolve("/echo");
Session session = container.connectToServer(new Endpoint()
{
@Override
public void onOpen(Session session, EndpointConfig config)
{
/* do nothing */
}
}, wsURI);
// don't care about the data sent, just the connect itself.
session.getBasicRemote().sendText("Hello");
session.close();
resp.setContentType("text/plain");
resp.getWriter().println("Connected to " + wsURI);
}
catch (Throwable t)
{
throw new ServletException(t);
}
}
}
/**
* Using the Server specific techniques of JSR356, connect to the echo socket
* and perform an echo request.
*/
public static class ServerConnectServlet extends HttpServlet
{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
// Server specific technique
javax.websocket.server.ServerContainer container =
(javax.websocket.server.ServerContainer)
req.getServletContext().getAttribute("javax.websocket.server.ServerContainer");
try
{
URI wsURI = WSURI.toWebsocket(req.getRequestURL()).resolve("/echo");
Session session = container.connectToServer(new Endpoint()
{
@Override
public void onOpen(Session session, EndpointConfig config)
{
/* do nothing */
}
}, wsURI);
// don't care about the data sent, just the connect itself.
session.getBasicRemote().sendText("Hello");
session.close();
resp.setContentType("text/plain");
resp.getWriter().println("Connected to " + wsURI);
}
catch (Throwable t)
{
throw new ServletException(t);
}
}
}
/**
* Using the Client specific techniques of JSR356, configure the WebSocketContainer.
*/
public static class ClientConfigureServlet extends HttpServlet
{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
// Client specific technique
WebSocketContainer container = ContainerProvider.getWebSocketContainer();
try
{
container.setAsyncSendTimeout(5000);
container.setDefaultMaxTextMessageBufferSize(1000);
resp.setContentType("text/plain");
resp.getWriter().printf("Configured %s - %s%n", container.getClass().getName(), container);
}
catch (Throwable t)
{
throw new ServletException(t);
}
}
}
private void assertNoHttpClientPoolThreads(List<String> threadNames)
{
for (String threadName : threadNames)
{
if (threadName.startsWith("HttpClient@") && !threadName.endsWith("-scheduler"))
{
throw new AssertionError("Found non-scheduler HttpClient thread in <" +
threadNames.stream().collect(Collectors.joining("[", ", ", "]"))
+ ">");
}
}
}
/**
* Using the Server specific techniques of JSR356, configure the WebSocketContainer.
*/
public static class ServerConfigureServlet extends HttpServlet
{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
// Server specific technique
javax.websocket.server.ServerContainer container =
(javax.websocket.server.ServerContainer)
req.getServletContext().getAttribute("javax.websocket.server.ServerContainer");
try
{
container.setAsyncSendTimeout(5000);
container.setDefaultMaxTextMessageBufferSize(1000);
resp.setContentType("text/plain");
resp.getWriter().printf("Configured %s - %s%n", container.getClass().getName(), container);
}
catch (Throwable t)
{
throw new ServletException(t);
}
}
}
@Test
public void testNoExtraHttpClientThreads() throws Exception
{
Server server = new Server(0);
ServletContextHandler contextHandler = new ServletContextHandler();
server.setHandler(contextHandler);
WebSocketServerContainerInitializer.configureContext(contextHandler);
try
{
server.start();
List<String> threadNames = getThreadNames();
assertNoHttpClientPoolThreads(threadNames);
assertThat("Threads", threadNames, not(hasItem(containsString("WebSocketContainer@"))));
assertThat("Threads", threadNames, not(hasItem(containsString("WebSocketClient@"))));
}
finally
{
server.stop();
}
}
@Test
public void testHttpClientThreads_AfterClientConnectTo() throws Exception
{
Server server = new Server(0);
ServletContextHandler contextHandler = new ServletContextHandler();
server.setHandler(contextHandler);
// Using JSR356 Client Techniques to connectToServer()
contextHandler.addServlet(ClientConnectServlet.class, "/connect");
javax.websocket.server.ServerContainer container = WebSocketServerContainerInitializer.configureContext(contextHandler);
container.addEndpoint(EchoSocket.class);
try
{
server.start();
String response = GET(server.getURI().resolve("/connect"));
assertThat("Response", response, startsWith("Connected to ws://"));
List<String> threadNames = getThreadNames();
assertNoHttpClientPoolThreads(threadNames);
assertThat("Threads", threadNames, hasItem(containsString("WebSocketContainer@")));
}
finally
{
server.stop();
}
}
@Test
public void testHttpClientThreads_AfterServerConnectTo() throws Exception
{
Server server = new Server(0);
ServletContextHandler contextHandler = new ServletContextHandler();
server.setHandler(contextHandler);
// Using JSR356 Server Techniques to connectToServer()
contextHandler.addServlet(ServerConnectServlet.class, "/connect");
javax.websocket.server.ServerContainer container = WebSocketServerContainerInitializer.configureContext(contextHandler);
container.addEndpoint(EchoSocket.class);
try
{
server.start();
String response = GET(server.getURI().resolve("/connect"));
assertThat("Response", response, startsWith("Connected to ws://"));
List<String> threadNames = getThreadNames();
assertNoHttpClientPoolThreads(threadNames);
assertThat("Threads", threadNames, hasItem(containsString("WebSocketClient@")));
}
finally
{
server.stop();
}
}
@Test
public void testHttpClientThreads_AfterClientConfigure() throws Exception
{
Server server = new Server(0);
ServletContextHandler contextHandler = new ServletContextHandler();
server.setHandler(contextHandler);
// Using JSR356 Client Techniques to configure WebSocketContainer
contextHandler.addServlet(ClientConfigureServlet.class, "/configure");
javax.websocket.server.ServerContainer container = WebSocketServerContainerInitializer.configureContext(contextHandler);
container.addEndpoint(EchoSocket.class);
try
{
server.start();
String response = GET(server.getURI().resolve("/configure"));
assertThat("Response", response, startsWith("Configured " + ClientContainer.class.getName()));
List<String> threadNames = getThreadNames();
assertNoHttpClientPoolThreads(threadNames);
assertThat("Threads", threadNames, not(hasItem(containsString("WebSocketContainer@"))));
assertThat("Threads", threadNames, not(hasItem(containsString("WebSocketClient@"))));
}
finally
{
server.stop();
}
}
@Test
public void testHttpClientThreads_AfterServerConfigure() throws Exception
{
Server server = new Server(0);
ServletContextHandler contextHandler = new ServletContextHandler();
server.setHandler(contextHandler);
// Using JSR356 Server Techniques to configure WebSocketContainer
contextHandler.addServlet(ServerConfigureServlet.class, "/configure");
javax.websocket.server.ServerContainer container = WebSocketServerContainerInitializer.configureContext(contextHandler);
container.addEndpoint(EchoSocket.class);
try
{
server.start();
String response = GET(server.getURI().resolve("/configure"));
assertThat("Response", response, startsWith("Configured " + ServerContainer.class.getName()));
List<String> threadNames = getThreadNames();
assertNoHttpClientPoolThreads(threadNames);
assertThat("Threads", threadNames, not(hasItem(containsString("WebSocketContainer@"))));
}
finally
{
server.stop();
}
}
private String GET(URI destURI) throws IOException
{
HttpURLConnection http = (HttpURLConnection) destURI.toURL().openConnection();
assertThat("HTTP GET (" + destURI + ") Response Code", http.getResponseCode(), is(200));
try (InputStream in = http.getInputStream();
InputStreamReader reader = new InputStreamReader(in, StandardCharsets.UTF_8);
StringWriter writer = new StringWriter())
{
IO.copy(reader, writer);
return writer.toString();
}
}
private List<String> getThreadNames()
{
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
ThreadInfo[] threads = threadMXBean.dumpAllThreads(false, false);
List<String> ret = new ArrayList<>();
for (ThreadInfo info : threads)
{
ret.add(info.getThreadName());
}
return ret;
}
}