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.store.kahadb.disk.journal;
  
  import java.io.File;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.Executors;
  import java.util.concurrent.TimeUnit;
  
  import junit.framework.TestCase;
  import org.apache.activemq.util.ByteSequence;
  import org.apache.activemq.util.IOHelper;
  
  public class JournalTest extends TestCase {
      protected static final int DEFAULT_MAX_BATCH_SIZE = 1024 * 1024 * 4;
  
      Journal dataManager;
      File dir;
  
      @Override
      public void setUp() throws Exception {
          dir = new File("target/tests/DataFileAppenderTest");
          dir.mkdirs();
          dataManager = new Journal();
          dataManager.setDirectory(dir);
          configure(dataManager);
          dataManager.start();
      }
  
      protected void configure(Journal dataManager) {
      }
  
      @Override
      public void tearDown() throws Exception {
          dataManager.close();
          IOHelper.delete(dir);
      }
  
      public void testBatchWriteCallbackCompleteAfterTimeout() throws Exception {
          final int iterations = 10;
          final CountDownLatch latch = new CountDownLatch(iterations);
          ByteSequence data = new ByteSequence("DATA".getBytes());
          for (int i=0; i < iterations; i++) {
              dataManager.write(data, new Runnable() {
                  public void run() {
                      latch.countDown();
                  }
              });
          }
          // at this point most probably dataManager.getInflightWrites().size() >= 0
          // as the Thread created in DataFileAppender.enqueue() may not have caught up.
          assertTrue("queued data is written", latch.await(5, TimeUnit.SECONDS));
      }
  
      public void testBatchWriteCallbackCompleteAfterClose() throws Exception {
          final int iterations = 10;
          final CountDownLatch latch = new CountDownLatch(iterations);
          ByteSequence data = new ByteSequence("DATA".getBytes());
          for (int i=0; i<iterations; i++) {
              dataManager.write(data, new Runnable() {
                  public void run() {
                      latch.countDown();
                  }
              });
          }
          dataManager.close();
          assertTrue("queued data is written", dataManager.getInflightWrites().isEmpty());
          assertEquals("none written", 0, latch.getCount());
      }
  
      public void testBatchWriteCompleteAfterClose() throws Exception {
          ByteSequence data = new ByteSequence("DATA".getBytes());
          final int iterations = 10;
          for (int i=0; i<iterations; i++) {
              dataManager.write(data, false);
          }
          dataManager.close();
          assertTrue("queued data is written:" + dataManager.getInflightWrites().size(), dataManager.getInflightWrites().isEmpty());
      }
  
      public void testBatchWriteToMaxMessageSize() throws Exception {
          final int iterations = 4;
          final CountDownLatch latch = new CountDownLatch(iterations);
          Runnable done = new Runnable() {
              public void run() {
                  latch.countDown();
              }
          };
          int messageSize = DEFAULT_MAX_BATCH_SIZE / iterations;
          byte[] message = new byte[messageSize];
          ByteSequence data = new ByteSequence(message);
  
          for (int i=0; i< iterations; i++) {
              dataManager.write(data, done);
          }
  
          // write may take some time
          assertTrue("all callbacks complete", latch.await(10, TimeUnit.SECONDS));
      }
  
      public void testNoBatchWriteWithSync() throws Exception {
          ByteSequence data = new ByteSequence("DATA".getBytes());
          final int iterations = 10;
          for (int i=0; i<iterations; i++) {
              dataManager.write(data, true);
              assertTrue("queued data is written", dataManager.getInflightWrites().isEmpty());
          }
      }
  }
  