content: /*
   * 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.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class ReliableTransportTest extends TestCase {
  
     private static final Logger LOG = LoggerFactory.getLogger(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<Object> exceptions = listener.getExceptions();
        Queue<Object> 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);
        }
     }
  
     @Override
     protected void setUp() throws Exception {
        if (replayStrategy == null) {
           replayStrategy = new ExceptionIfDroppedReplayStrategy();
        }
        transport = new ReliableTransport(new StubTransport(), replayStrategy);
        transport.setTransportListener(listener);
        transport.start();
     }
  
  }
  