| /* |
| * 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; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import javax.websocket.ClientEndpointConfig.Builder; |
| import javax.websocket.ContainerProvider; |
| import javax.websocket.DeploymentException; |
| import javax.websocket.WebSocketContainer; |
| |
| import org.junit.Test; |
| |
| import org.apache.catalina.Context; |
| import org.apache.catalina.servlets.DefaultServlet; |
| import org.apache.catalina.startup.Tomcat; |
| import org.apache.catalina.startup.TomcatBaseTest; |
| import org.apache.tomcat.websocket.TesterMessageCountClient.TesterProgrammaticEndpoint; |
| |
| |
| public class TesterConnectionLimit extends TomcatBaseTest{ |
| |
| /* |
| * Simple test to see how many outgoing connections can be created on a |
| * single machine. |
| */ |
| @Test |
| public void testSingleMachine() throws Exception { |
| Tomcat tomcat = getTomcatInstance(); |
| // No file system docBase required |
| Context ctx = tomcat.addContext("", null); |
| ctx.addApplicationListener(TesterEchoServer.Config.class.getName()); |
| Tomcat.addServlet(ctx, "default", new DefaultServlet()); |
| ctx.addServletMappingDecoded("/", "default"); |
| |
| tomcat.getConnector().setAttribute("maxConnections", "-1"); |
| |
| tomcat.start(); |
| |
| URI uri = new URI("ws://localhost:" + getPort() + |
| TesterEchoServer.Config.PATH_ASYNC); |
| AtomicInteger counter = new AtomicInteger(0); |
| |
| int threadCount = 50; |
| |
| Thread[] threads = new ConnectionThread[threadCount]; |
| |
| for (int i = 0; i < threadCount; i++) { |
| threads[i] = new ConnectionThread(counter, uri); |
| threads[i].start(); |
| } |
| |
| // Wait for the threads to die |
| for (Thread thread : threads) { |
| thread.join(); |
| } |
| |
| System.out.println("Maximum connection count was " + counter.get()); |
| } |
| |
| private static class ConnectionThread extends Thread { |
| |
| private final AtomicInteger counter; |
| private final URI uri; |
| |
| private ConnectionThread(AtomicInteger counter, URI uri) { |
| this.counter = counter; |
| this.uri = uri; |
| } |
| |
| @Override |
| public void run() { |
| WebSocketContainer wsContainer = |
| ContainerProvider.getWebSocketContainer(); |
| |
| int count = 0; |
| |
| try { |
| while (true) { |
| wsContainer.connectToServer(TesterProgrammaticEndpoint.class, |
| Builder.create().build(), uri); |
| count = counter.incrementAndGet(); |
| if (count % 100 == 0) { |
| System.out.println(count + " and counting..."); |
| } |
| } |
| } catch (IOException | DeploymentException ioe) { |
| // Let thread die |
| } |
| } |
| } |
| } |