/**
* 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.activemq.store.kahadb.disk.journal;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import java.io.File;
import java.util.concurrent.TimeUnit;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTextMessage;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.store.MessageStore;
import org.apache.activemq.store.kahadb.KahaDBStore;
import org.junit.After;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.junit.rules.Timeout;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class JournalMaxFileLengthChangeTest {
private static final Logger LOG = LoggerFactory.getLogger(JournalMaxFileLengthChangeTest.class);
private static int ONE_MB = 1024*1024;
@Rule
public TemporaryFolder dataDir = new TemporaryFolder();
@Rule
public Timeout globalTimeout= new Timeout(20, TimeUnit.SECONDS);
private KahaDBStore store;
@After
public void after() throws Exception {
if (store != null) {
store.stop();
}
}
/**
* Test that reported size is correct if the maxFileLength grows
* in between journal restarts. Verify all messages still received.
*/
@Test
public void testMaxFileLengthGrow() throws Exception {
MessageStore messageStore = createStore(8 * ONE_MB);
addMessages(messageStore, 4);
long sizeBeforeChange = store.getJournal().getDiskSize();
LOG.info("Journal size before: " + sizeBeforeChange);
store.stop();
messageStore = createStore(6 * ONE_MB);
verifyMessages(messageStore, 4);
long sizeAfterChange = store.getJournal().getDiskSize();
LOG.info("Journal size after: " + sizeAfterChange);
//verify the size is the same - will be slightly different as checkpoint journal
//commands are written but should be close
assertEquals(sizeBeforeChange, sizeAfterChange, 4096);
}
/**
* Test that reported size is correct if the maxFileLength shrinks
* in between journal restarts. Verify all messages still received.
*/
@Test
public void testMaxFileLengthShrink() throws Exception {
MessageStore messageStore = createStore(8 * ONE_MB);
addMessages(messageStore, 4);
long sizeBeforeChange = store.getJournal().getDiskSize();
LOG.info("Journal size before: " + sizeBeforeChange);
store.stop();
messageStore = createStore(2 * ONE_MB);
verifyMessages(messageStore, 4);
long sizeAfterChange = store.getJournal().getDiskSize();
LOG.info("Journal size after: " + sizeAfterChange);
//verify the size is the same - will be slightly different as checkpoint journal
//commands are written but should be close
assertEquals(sizeBeforeChange, sizeAfterChange, 4096);
}
private void addMessages(MessageStore messageStore, int num) throws Exception {
String text = getString(ONE_MB);
for (int i=0; i < num; i++) {
ActiveMQTextMessage textMessage = new ActiveMQTextMessage();
textMessage.setMessageId(new MessageId("1:2:3:" + i));
textMessage.setText(text);
messageStore.addMessage(new ConnectionContext(), textMessage);
}
}
private void verifyMessages(MessageStore messageStore, int num) throws Exception {
for (int i=0; i < num; i++) {
assertNotNull(messageStore.getMessage(new MessageId("1:2:3:" + i)));
}
}
private String getString(int size) {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < size; i++) {
builder.append("a");
}
return builder.toString();
}
private MessageStore createStore(int length) throws Exception {
File dataDirectory = dataDir.getRoot();
store = new KahaDBStore();
store.setJournalMaxFileLength(length);
store.setDirectory(dataDirectory);
store.setForceRecoverIndex(true);
store.start();
return store.createQueueMessageStore(new ActiveMQQueue("test"));
}
}