/**
* 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.transport.reliable;
import java.util.Queue;
import junit.framework.TestCase;
import org.apache.activemq.command.ConsumerInfo;
import org.apache.activemq.transport.StubTransport;
import org.apache.activemq.transport.StubTransportListener;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @version $Revision: 564271 $
*/
public class ReliableTransportTest extends TestCase {
private static final Log LOG = LogFactory.getLog(ReliableTransportTest.class);
protected ReliableTransport transport;
protected StubTransportListener listener = new StubTransportListener();
protected ReplayStrategy replayStrategy;
public void testValidSequenceOfPackets() throws Exception {
int[] sequenceNumbers = {1, 2, 3, 4, 5, 6, 7};
sendStreamOfCommands(sequenceNumbers, true);
}
public void testValidWrapAroundPackets() throws Exception {
int[] sequenceNumbers = new int[10];
int value = Integer.MAX_VALUE - 3;
transport.setExpectedCounter(value);
for (int i = 0; i < 10; i++) {
LOG.info("command: " + i + " = " + value);
sequenceNumbers[i] = value++;
}
sendStreamOfCommands(sequenceNumbers, true);
}
public void testDuplicatePacketsDropped() throws Exception {
int[] sequenceNumbers = {1, 2, 2, 3, 4, 5, 6, 7};
sendStreamOfCommands(sequenceNumbers, true, 7);
}
public void testOldDuplicatePacketsDropped() throws Exception {
int[] sequenceNumbers = {1, 2, 3, 4, 5, 2, 6, 7};
sendStreamOfCommands(sequenceNumbers, true, 7);
}
public void testOldDuplicatePacketsDroppedUsingNegativeCounters() throws Exception {
int[] sequenceNumbers = {-3, -1, -3, -2, -1, 0, 1, -1, 3, 2, 0, 2, 4};
transport.setExpectedCounter(-3);
sendStreamOfCommands(sequenceNumbers, true, 8);
}
public void testWrongOrderOfPackets() throws Exception {
int[] sequenceNumbers = {4, 3, 1, 5, 2, 7, 6, 8, 10, 9};
sendStreamOfCommands(sequenceNumbers, true);
}
public void testMissingPacketsFails() throws Exception {
int[] sequenceNumbers = {1, 2, /* 3, */4, 5, 6, 7, 8, 9, 10};
sendStreamOfCommands(sequenceNumbers, false);
}
protected void sendStreamOfCommands(int[] sequenceNumbers, boolean expected) {
sendStreamOfCommands(sequenceNumbers, expected, sequenceNumbers.length);
}
protected void sendStreamOfCommands(int[] sequenceNumbers, boolean expected, int expectedCount) {
for (int i = 0; i < sequenceNumbers.length; i++) {
int commandId = sequenceNumbers[i];
ConsumerInfo info = new ConsumerInfo();
info.setSelector("Cheese: " + commandId);
info.setCommandId(commandId);
transport.onCommand(info);
}
Queue exceptions = listener.getExceptions();
Queue commands = listener.getCommands();
if (expected) {
if (!exceptions.isEmpty()) {
Exception e = (Exception)exceptions.remove();
e.printStackTrace();
fail("Caught exception: " + e);
}
assertEquals("number of messages received", expectedCount, commands.size());
assertEquals("Should have no buffered commands", 0, transport.getBufferedCommandCount());
} else {
assertTrue("Should have received an exception!", exceptions.size() > 0);
Exception e = (Exception)exceptions.remove();
LOG.info("Caught expected response: " + e);
}
}
protected void setUp() throws Exception {
if (replayStrategy == null) {
replayStrategy = new ExceptionIfDroppedReplayStrategy();
}
transport = new ReliableTransport(new StubTransport(), replayStrategy);
transport.setTransportListener(listener);
transport.start();
}
}