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 static org.junit.Assert.assertTrue;
  
  import java.io.File;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.Executors;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.activemq.util.ByteSequence;
  import org.apache.activemq.util.IOHelper;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  /**
   * Test the single threaded DataFileAppender class.
   */
  public class TargetedDataFileAppenderTest {
  
      private Journal dataManager;
      private TargetedDataFileAppender appender;
      private DataFile dataFile;
      private File dir;
  
      @Before
      public void setUp() throws Exception {
          dir = new File("target/tests/TargetedDataFileAppenderTest");
          dir.mkdirs();
          dataManager = new Journal();
          dataManager.setDirectory(dir);
          dataManager.start();
  
          dataFile = dataManager.reserveDataFile();
          appender = new TargetedDataFileAppender(dataManager, dataFile);
      }
  
      @After
      public void tearDown() throws Exception {
          dataManager.close();
          IOHelper.delete(dir);
      }
  
      @Test
      public void testWritesAreBatched() throws Exception {
          final int iterations = 10;
          ByteSequence data = new ByteSequence("DATA".getBytes());
          for (int i = 0; i < iterations; i++) {
              appender.storeItem(data, Journal.USER_RECORD_TYPE, false);
          }
  
          assertTrue("Data file should not be empty", dataFile.getLength() > 0);
          assertTrue("Data file should be empty", dataFile.getFile().length() == 0);
  
          appender.close();
  
          // at this point most probably dataManager.getInflightWrites().size() >= 0
          // as the Thread created in DataFileAppender.enqueue() may not have caught up.
          assertTrue("Data file should not be empty", dataFile.getLength() > 0);
          assertTrue("Data file should not be empty", dataFile.getFile().length() > 0);
      }
  
      @Test
      public void testBatchWritesCompleteAfterClose() throws Exception {
          final int iterations = 10;
          ByteSequence data = new ByteSequence("DATA".getBytes());
          for (int i = 0; i < iterations; i++) {
              appender.storeItem(data, Journal.USER_RECORD_TYPE, false);
          }
  
          appender.close();
  
          // at this point most probably dataManager.getInflightWrites().size() >= 0
          // as the Thread created in DataFileAppender.enqueue() may not have caught up.
          assertTrue("Data file should not be empty", dataFile.getLength() > 0);
          assertTrue("Data file should not be empty", dataFile.getFile().length() > 0);
      }
  
      @Test
      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++) {
              appender.storeItem(data, Journal.USER_RECORD_TYPE, new Runnable() {
                  @Override
                  public void run() {
                      latch.countDown();
                  }
              });
          }
  
          appender.close();
  
          // 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));
          assertTrue("Data file should not be empty", dataFile.getLength() > 0);
          assertTrue("Data file should not be empty", dataFile.getFile().length() > 0);
      }
  }
  