/*
* 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.client.topic;
import com.hazelcast.client.test.TestHazelcastFactory;
import com.hazelcast.config.Config;
import com.hazelcast.config.RingbufferConfig;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.ITopic;
import com.hazelcast.core.Message;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.annotation.ParallelTest;
import com.hazelcast.test.annotation.QuickTest;
import com.hazelcast.topic.ReliableMessageListener;
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.util.Arrays;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* Test for #7317 (https://github.com/hazelcast/hazelcast/issues/7317), contributed
* by @nilskp (https://github.com/nilskp). Test retrieval of already published messages
* after a loss-tolerant {@link ReliableMessageListener} registers with an initial
* sequence outside head-tail sequence range, which results in a {@link com.hazelcast.ringbuffer.StaleSequenceException}.
*/
@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelTest.class})
public class Issue7317Test {
static final String smallRB = "foo";
static final int smallRBCapacity = 3;
private final TestHazelcastFactory hazelcastFactory = new TestHazelcastFactory();
private HazelcastInstance client;
@Before
public void setup() {
Config serverConfig = new Config();
RingbufferConfig rbConf = new RingbufferConfig(smallRB);
rbConf.setCapacity(smallRBCapacity);
serverConfig.addRingBufferConfig(rbConf);
hazelcastFactory.newHazelcastInstance(serverConfig);
client = hazelcastFactory.newHazelcastClient();
}
@After
public void tearDown() {
hazelcastFactory.terminateAll();
}
static class Issue7317MessageListener
implements ReliableMessageListener<String> {
private final List<String> messages;
private final CountDownLatch cdl;
private long seq;
public Issue7317MessageListener(List<String> messages, CountDownLatch cdl) {
this.messages = messages;
this.cdl = cdl;
}
public void onMessage(Message<String> msg) {
assertEquals(messages.size() - cdl.getCount(), (int) seq);
assertEquals(messages.get((int) seq), msg.getMessageObject());
cdl.countDown();
}
public long retrieveInitialSequence() {
return 0;
}
public void storeSequence(long sequence) {
seq = sequence;
}
public boolean isLossTolerant() {
return true;
}
public boolean isTerminal(Throwable failure) {
return true;
}
}
@Test
public void registerListenerOnStaleSequenceClientServer()
throws InterruptedException {
final List<String> messages = Arrays.asList("a", "b", "c", "d", "e");
final CountDownLatch cdl = new CountDownLatch(smallRBCapacity);
ITopic<String> rTopic = client.getReliableTopic(smallRB);
for (String message : messages) {
rTopic.publish(message);
}
ReliableMessageListener<String> listener = new Issue7317MessageListener(messages, cdl);
String reg = rTopic.addMessageListener(listener);
assertTrue(cdl.await(5, TimeUnit.SECONDS));
rTopic.removeMessageListener(reg);
}
}