110 lines
3.7 KiB
Java
110 lines
3.7 KiB
Java
/*
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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 org.apache.tomcat.websocket;
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import java.io.IOException;
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import java.net.URI;
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import java.util.concurrent.atomic.AtomicInteger;
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import javax.websocket.ClientEndpointConfig.Builder;
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import javax.websocket.ContainerProvider;
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import javax.websocket.DeploymentException;
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import javax.websocket.WebSocketContainer;
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import org.junit.Ignore;
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import org.junit.Test;
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import org.apache.catalina.Context;
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import org.apache.catalina.servlets.DefaultServlet;
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import org.apache.catalina.startup.Tomcat;
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import org.apache.catalina.startup.TomcatBaseTest;
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import org.apache.tomcat.websocket.TesterMessageCountClient.TesterProgrammaticEndpoint;
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@Ignore // Not for use in normal unit test runs
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public class TestConnectionLimit extends TomcatBaseTest {
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/*
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* Simple test to see how many outgoing connections can be created on a
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* single machine.
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*/
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@Test
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public void testSingleMachine() throws Exception {
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Tomcat tomcat = getTomcatInstance();
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// No file system docBase required
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Context ctx = tomcat.addContext("", null);
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ctx.addApplicationListener(TesterEchoServer.Config.class.getName());
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Tomcat.addServlet(ctx, "default", new DefaultServlet());
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ctx.addServletMappingDecoded("/", "default");
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tomcat.getConnector().setAttribute("maxConnections", "-1");
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tomcat.start();
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URI uri = new URI("ws://localhost:" + getPort() +
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TesterEchoServer.Config.PATH_ASYNC);
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AtomicInteger counter = new AtomicInteger(0);
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int threadCount = 50;
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Thread[] threads = new ConnectionThread[threadCount];
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for (int i = 0; i < threadCount; i++) {
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threads[i] = new ConnectionThread(counter, uri);
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threads[i].start();
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}
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// Wait for the threads to die
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for (Thread thread : threads) {
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thread.join();
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}
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System.out.println("Maximum connection count was " + counter.get());
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}
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private static class ConnectionThread extends Thread {
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private final AtomicInteger counter;
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private final URI uri;
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private ConnectionThread(AtomicInteger counter, URI uri) {
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this.counter = counter;
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this.uri = uri;
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}
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@Override
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public void run() {
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WebSocketContainer wsContainer =
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ContainerProvider.getWebSocketContainer();
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int count = 0;
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try {
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while (true) {
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wsContainer.connectToServer(TesterProgrammaticEndpoint.class,
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Builder.create().build(), uri);
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count = counter.incrementAndGet();
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if (count % 100 == 0) {
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System.out.println(count + " and counting...");
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}
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}
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} catch (IOException | DeploymentException ioe) {
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// Let thread die
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}
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}
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}
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}
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