TestCleanupQueue.java

/**
 * 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,
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 * See the License for the specific language governing permissions and
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 */
package org.apache.hadoop.mapred;

import java.io.File;
import java.io.IOException;

import junit.framework.Assert;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.CleanupQueue.PathDeletionContext;
import org.apache.hadoop.security.UserGroupInformation;
import org.junit.Test;

public class TestCleanupQueue {
  @Test (timeout = 2000)
  public void testCleanupQueueClosesFilesystem() throws IOException,
      InterruptedException {
    Configuration conf = new Configuration();
    File file = new File("afile.txt");
    file.createNewFile();
    Path path = new Path(file.getAbsoluteFile().toURI());
    
    FileSystem.get(conf);
    Assert.assertEquals(1, FileSystem.getCacheSize());
    
    // With UGI, should close FileSystem
    CleanupQueue cleanupQueue = new CleanupQueue();
    PathDeletionContext context = new PathDeletionContext(path, conf,
        UserGroupInformation.getLoginUser());
    cleanupQueue.addToQueue(context);
    
    while (FileSystem.getCacheSize() > 0) {
      Thread.sleep(100);
    }
    
    file.createNewFile();
    FileSystem.get(conf);
    Assert.assertEquals(1, FileSystem.getCacheSize());
    
    // Without UGI, should not close FileSystem
    context = new PathDeletionContext(path, conf);
    cleanupQueue.addToQueue(context);
    
    while (file.exists()) {
      Thread.sleep(100);
    }
    Assert.assertEquals(1, FileSystem.getCacheSize());
  }
}