| /* |
| * 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.ignite.jvmtest; |
| |
| import java.net.BindException; |
| import java.net.InetAddress; |
| import java.net.ServerSocket; |
| import java.net.SocketException; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CyclicBarrier; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import org.apache.ignite.internal.util.typedef.X; |
| import org.apache.ignite.internal.util.typedef.internal.U; |
| import org.apache.ignite.testframework.GridTestUtils; |
| import org.jetbrains.annotations.Nullable; |
| import org.junit.Test; |
| |
| /** |
| * Java server socket test. |
| * |
| * When binding server socket to the same port in multiple threads, either |
| * BindException or SocketException may be thrown. Purpose of this test is |
| * to find some explanation to that. |
| */ |
| public class ServerSocketMultiThreadedTest { |
| /** */ |
| private static final int THREADS_CNT = 10; |
| |
| /** */ |
| private static final int ITER_CNT = 10000; |
| |
| /** |
| * @throws Exception If failed. |
| */ |
| @Test |
| public void testConcurrentBind() throws Exception { |
| final AtomicInteger bindExCnt = new AtomicInteger(); |
| final AtomicInteger sockExCnt = new AtomicInteger(); |
| final AtomicInteger okCnt = new AtomicInteger(); |
| |
| final CyclicBarrier finishBarrier = new CyclicBarrier( |
| THREADS_CNT, |
| new Runnable() { |
| private int i; |
| |
| @Override public void run() { |
| if (++i % 250 == 0) |
| X.println("Finished iteration [threadName=" + Thread.currentThread().getName() + |
| ", iter=" + i + ']'); |
| } |
| }); |
| |
| final InetAddress addr = InetAddress.getByName("127.0.0.1"); |
| |
| GridTestUtils.runMultiThreaded( |
| new Callable<Object>() { |
| @Nullable @Override public Object call() throws Exception { |
| ServerSocket srvSock = null; |
| |
| for (int i = 0; i < ITER_CNT; i++) { |
| try { |
| srvSock = new ServerSocket(60000, 0, addr); |
| |
| okCnt.incrementAndGet(); |
| } |
| catch (BindException ignore) { |
| bindExCnt.incrementAndGet(); |
| } |
| catch (SocketException ignore) { |
| sockExCnt.incrementAndGet(); |
| } |
| finally { |
| finishBarrier.await(); |
| |
| U.closeQuiet(srvSock); |
| } |
| } |
| |
| return null; |
| } |
| }, |
| THREADS_CNT, |
| "binder" |
| ); |
| |
| X.println("Test stats [bindExCnt=" + bindExCnt.get() + ", sockExCnt=" + sockExCnt.get() + |
| ", okCnt=" + okCnt + ']'); |
| } |
| } |