/*
* 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.instance;
import com.hazelcast.config.Config;
import com.hazelcast.config.MulticastConfig;
import com.hazelcast.core.Cluster;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.test.HazelcastSerialClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assume.assumeFalse;
/**
* Test the multicast loopback mode when there is no other
* network interface than 127.0.0.1.
*
* @author Stéphane Galland <galland@arakhne.org>
*/
@RunWith(HazelcastSerialClassRunner.class)
@Category(QuickTest.class)
public class MulticastLoopbackModeTest extends HazelcastTestSupport {
/**
* Replies if a network interface was properly configured.
*
* @return <code>true</code> if there is at least one configured interface;
* <code>false</code> otherwise.
*/
protected static boolean hasConfiguredNetworkInterface() {
try {
Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
while (e.hasMoreElements()) {
NetworkInterface i = e.nextElement();
Enumeration<InetAddress> as = i.getInetAddresses();
while (as.hasMoreElements()) {
InetAddress a = as.nextElement();
if (a instanceof Inet4Address && !a.isLoopbackAddress() && !a.isMulticastAddress()) {
return true;
}
}
}
} catch (Exception ignored) {
// silently cast the exceptions
}
return false;
}
private String multicastGroup;
private HazelcastInstance hz1;
private HazelcastInstance hz2;
@Before
public void setUpTests() {
assumeFalse(
"This test can be processed only if your host has no configured network interface.",
hasConfiguredNetworkInterface());
multicastGroup = System.clearProperty("hazelcast.multicast.group");
}
@After
public void tearDownTests() {
HazelcastInstanceFactory.terminateAll();
if (multicastGroup == null) {
System.clearProperty("hazelcast.multicast.group");
} else {
System.setProperty("hazelcast.multicast.group", multicastGroup);
}
}
private void createTestEnvironment(boolean loopbackMode) throws Exception {
Config config = new Config();
config.setProperty("hazelcast.local.localAddress", "127.0.0.1");
MulticastConfig multicastConfig = config.getNetworkConfig().getJoin().getMulticastConfig();
multicastConfig.setEnabled(true);
multicastConfig.setLoopbackModeEnabled(loopbackMode);
hz1 = HazelcastInstanceFactory.newHazelcastInstance(config);
assertNotNull("Cannot create the first HazelcastInstance", hz1);
hz2 = HazelcastInstanceFactory.newHazelcastInstance(config);
assertNotNull("Cannot create the second HazelcastInstance", hz2);
}
@Test
public void testEnabledMode() throws Exception {
createTestEnvironment(true);
assertClusterSize(2, hz1, hz2);
Cluster cluster1 = hz1.getCluster();
Cluster cluster2 = hz2.getCluster();
assertTrue("Members list " + cluster1.getMembers() + " should contain " + cluster2.getLocalMember(),
cluster1.getMembers().contains(cluster2.getLocalMember()));
assertTrue("Members list " + cluster2.getMembers() + " should contain " + cluster1.getLocalMember(),
cluster2.getMembers().contains(cluster1.getLocalMember()));
}
@Test
public void testDisabledMode() throws Exception {
createTestEnvironment(false);
assertClusterSize(1, hz1);
assertClusterSize(1, hz2);
}
}