/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.nio;
import com.hazelcast.config.Config;
import com.hazelcast.config.SocketInterceptorConfig;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.internal.management.ThreadDumpGenerator;
import com.hazelcast.test.HazelcastTestSupport;
import org.junit.After;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import static org.junit.Assert.assertTrue;
/**
* IGNORED THIS TEST COMPLETELY. KEEPING FOR FUTURE REFERENCE.
* PRONE TO FAIL BECAUSE OF BLOCKING TCP CONNECT-ACCEPT-CLOSE CYCLE.
*/
@Ignore("See testBlockedClientSockets and testBlockedClientSockets2 tests. " +
"Currently we couldn't find a way to make them pass...")
public class ConnectionTest extends HazelcastTestSupport {
@BeforeClass
public static void init() {
Hazelcast.shutdownAll();
}
@After
public void cleanup() {
Hazelcast.shutdownAll();
}
@Test
public void testBlockedClientSockets() throws Exception {
final ServerSocket serverSocket = new ServerSocket(13131, 1);
final int count = 100;
final CountDownLatch latch = new CountDownLatch(count);
final AtomicInteger connected = new AtomicInteger();
final AtomicInteger cc = new AtomicInteger();
final Set<Socket> sockets = Collections.newSetFromMap(new ConcurrentHashMap<Socket, Boolean>());
final Thread st = new Thread("server-socket") {
public void run() {
while (!isInterrupted()) {
try {
Socket socket = serverSocket.accept();
sockets.add(socket);
} catch (IOException ignored) {
}
}
}
};
st.start();
final AtomicBoolean flag = new AtomicBoolean(false);
for (int i = 0; i < count; i++) {
final Socket clientSocket = new Socket();
Thread t = new Thread("client-socket-" + i) {
public void run() {
try {
if (cc.incrementAndGet() > count / 5 && Math.random() > .87f && flag.compareAndSet(false, true)) {
st.interrupt();
serverSocket.close();
try {
st.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
Iterator<Socket> iter = sockets.iterator();
while (iter.hasNext()) {
Socket socket = iter.next();
socket.shutdownOutput();
socket.close();
iter.remove();
}
} else {
clientSocket.connect(new InetSocketAddress(13131));
connected.incrementAndGet();
clientSocket.getInputStream().read();
}
} catch (IOException ignored) {
} finally {
latch.countDown();
}
}
};
t.setDaemon(true);
t.start();
}
assertTrue(latch.await(1, TimeUnit.MINUTES));
}
@Test
public void testBlockedClientSockets2() throws Exception {
final ServerSocket serverSocket = new ServerSocket(13131);
final int count = 100;
final CountDownLatch latch = new CountDownLatch(count);
final AtomicInteger connected = new AtomicInteger();
final AtomicInteger cc = new AtomicInteger();
final AtomicBoolean flag = new AtomicBoolean(false);
for (int i = 0; i < count; i++) {
final Socket clientSocket = new Socket();
Thread t = new Thread("client-socket-" + i) {
public void run() {
try {
if (cc.incrementAndGet() > count / 5 && Math.random() > .87f && flag.compareAndSet(false, true)) {
serverSocket.close();
} else {
clientSocket.setSoTimeout(1000 * 5);
clientSocket.connect(new InetSocketAddress(13131));
connected.incrementAndGet();
InputStream in = clientSocket.getInputStream();
in.read();
}
} catch (IOException ignored) {
} finally {
latch.countDown();
}
}
};
t.setDaemon(true);
t.start();
}
assertTrue(latch.await(1, TimeUnit.MINUTES));
}
@Test
public void testDanglingSocketsOnTerminate() throws Exception {
testDanglingSocketsOnTerminate(false);
}
@Test
public void testDanglingSocketsOnTerminate2() throws Exception {
testDanglingSocketsOnTerminate(true);
}
private void testDanglingSocketsOnTerminate(boolean withSocketInterceptor) throws Exception {
final int port = 5701;
Config config = new Config();
config.getNetworkConfig().setPort(port).setPortAutoIncrement(false);
if (withSocketInterceptor) {
config.getNetworkConfig().setSocketInterceptorConfig(new SocketInterceptorConfig().setEnabled(true)
.setImplementation(new MemberSocketInterceptor() {
public void init(Properties properties) {
}
public void onAccept(Socket acceptedSocket) throws IOException {
}
public void onConnect(Socket connectedSocket) throws IOException {
}
}));
}
final HazelcastInstance hz = Hazelcast.newHazelcastInstance(config);
final int count = 100;
final CountDownLatch latch = new CountDownLatch(count);
final CountDownLatch ll = new CountDownLatch(1);
final AtomicInteger cc = new AtomicInteger();
new Thread() {
public void run() {
try {
ll.await(1, TimeUnit.MINUTES);
hz.getLifecycleService().terminate();
} catch (InterruptedException ignored) {
}
}
}.start();
final Collection<Socket> sockets = Collections.newSetFromMap(new ConcurrentHashMap<Socket, Boolean>());
final AtomicInteger k0 = new AtomicInteger();
final AtomicInteger k1 = new AtomicInteger();
for (int i = 0; i < count; i++) {
Runnable task = new Runnable() {
public void run() {
try {
if (cc.incrementAndGet() == count / 10) {
ll.countDown();
}
Socket socket = new Socket();
sockets.add(socket);
try {
socket.connect(new InetSocketAddress(port));
k0.incrementAndGet();
} catch (IOException e) {
k1.incrementAndGet();
}
OutputStream out = socket.getOutputStream();
out.write(Protocols.CLUSTER.getBytes());
out.flush();
socket.getInputStream().read();
} catch (IOException ignored) {
} finally {
latch.countDown();
}
}
};
Thread t = new Thread(task, "socket-thread-" + i);
t.setDaemon(true);
t.start();
}
try {
assertTrue(latch.await(1, TimeUnit.MINUTES));
} catch (AssertionError e) {
System.err.println(ThreadDumpGenerator.dumpAllThreads());
throw e;
} finally {
for (Socket socket : sockets) {
try {
socket.close();
} catch (Exception e) {
ignore(e);
}
}
}
}
}