hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/mapred/TestDeletedDirTracker.java - hadoop - Git at Google

 /*
  * 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.hadoop.tools.mapred;

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;

 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.tools.CopyListingFileStatus;

 /**
  * Unit tests of the deleted directory tracker.
  */
 @SuppressWarnings("RedundantThrows")
 public class TestDeletedDirTracker extends Assert {

   private static final Logger LOG =
       LoggerFactory.getLogger(TestDeletedDirTracker.class);

   public static final Path ROOT = new Path("hdfs://namenode/");

   public static final Path DIR1 = new Path(ROOT, "dir1");

   public static final Path FILE0 = new Path(ROOT, "file0");

   public static final Path DIR1_FILE1 = new Path(DIR1, "file1");

   public static final Path DIR1_FILE2 = new Path(DIR1, "file2");

   public static final Path DIR1_DIR3 = new Path(DIR1, "dir3");

   public static final Path DIR1_DIR3_DIR4 = new Path(DIR1_DIR3, "dir4");

   public static final Path DIR1_DIR3_DIR4_FILE_3 =
       new Path(DIR1_DIR3_DIR4, "file1");


   private DeletedDirTracker tracker;

   @Before
   public void setup() {
     tracker = new DeletedDirTracker(1000);
   }

   @After
   public void teardown() {
     LOG.info(tracker.toString());
   }

   @Test(expected = IllegalArgumentException.class)
   public void testNoRootDir() throws Throwable {
     shouldDelete(ROOT, true);
   }

   @Test(expected = IllegalArgumentException.class)
   public void testNoRootFile() throws Throwable {
     shouldDelete(dirStatus(ROOT));
   }

   @Test
   public void testFileInRootDir() throws Throwable {
     expectShouldDelete(FILE0, false);
     expectShouldDelete(FILE0, false);
   }

   @Test
   public void testDeleteDir1() throws Throwable {
     expectShouldDelete(DIR1, true);
     expectShouldNotDelete(DIR1, true);
     expectShouldNotDelete(DIR1_FILE1, false);
     expectNotCached(DIR1_FILE1);
     expectShouldNotDelete(DIR1_DIR3, true);
     expectCached(DIR1_DIR3);
     expectShouldNotDelete(DIR1_FILE2, false);
     expectShouldNotDelete(DIR1_DIR3_DIR4_FILE_3, false);
     expectShouldNotDelete(DIR1_DIR3_DIR4, true);
     expectShouldNotDelete(DIR1_DIR3_DIR4, true);
   }

   @Test
   public void testDeleteDirDeep() throws Throwable {
     expectShouldDelete(DIR1, true);
     expectShouldNotDelete(DIR1_DIR3_DIR4_FILE_3, false);
   }

   @Test
   public void testDeletePerfectCache() throws Throwable {
     // run a larger scale test. Also use the ordering we'd expect for a sorted
     // listing, which we implement by sorting the paths
     List<CopyListingFileStatus> statusList = buildStatusList();
     // cache is bigger than the status list
     tracker = new DeletedDirTracker(statusList.size());

     AtomicInteger deletedFiles = new AtomicInteger(0);
     AtomicInteger deletedDirs = new AtomicInteger(0);
     deletePaths(statusList, deletedFiles, deletedDirs);
     assertEquals(0, deletedFiles.get());
   }

   @Test
   public void testDeleteFullCache() throws Throwable {
     // run a larger scale test. Also use the ordering we'd expect for a sorted
     // listing, which we implement by sorting the paths
     AtomicInteger deletedFiles = new AtomicInteger(0);
     AtomicInteger deletedDirs = new AtomicInteger(0);
     deletePaths(buildStatusList(), deletedFiles, deletedDirs);
     assertEquals(0, deletedFiles.get());
   }

   @Test
   public void testDeleteMediumCache() throws Throwable {
     tracker = new DeletedDirTracker(100);
     AtomicInteger deletedFiles = new AtomicInteger(0);
     AtomicInteger deletedDirs = new AtomicInteger(0);
     deletePaths(buildStatusList(), deletedFiles, deletedDirs);
     assertEquals(0, deletedFiles.get());
   }

   @Test
   public void testDeleteFullSmallCache() throws Throwable {
     tracker = new DeletedDirTracker(10);
     AtomicInteger deletedFiles = new AtomicInteger(0);
     AtomicInteger deletedDirs = new AtomicInteger(0);
     deletePaths(buildStatusList(), deletedFiles, deletedDirs);
     assertEquals(0, deletedFiles.get());
   }

   protected void deletePaths(final List<CopyListingFileStatus> statusList,
       final AtomicInteger deletedFiles, final AtomicInteger deletedDirs) {
     for (CopyListingFileStatus status : statusList) {
       if (shouldDelete(status)) {
         AtomicInteger r = status.isDirectory() ? deletedDirs : deletedFiles;
         r.incrementAndGet();
         LOG.info("Delete {}", status.getPath());
       }
     }

     LOG.info("After proposing to delete {} paths, {} directories and {} files"
             + " were explicitly deleted from a cache {}",
         statusList.size(), deletedDirs, deletedFiles, tracker);
   }

   /**
    * Build a large YMD status list; 30 * 12 * 10 directories,
    * each with 24 files.
    * @return a sorted list.
    */
   protected List<CopyListingFileStatus> buildStatusList() {
     List<CopyListingFileStatus> statusList = new ArrayList<>();
     // recursive create of many files
     for (int y = 0; y <= 20; y++) {
       Path yp = new Path(String.format("YEAR=%d", y));
       statusList.add(dirStatus(yp));
       for (int m = 1; m <= 12; m++) {
         Path ymp = new Path(yp, String.format("MONTH=%d", m));
         statusList.add(dirStatus(ymp));
         for (int d = 1; d < 30; d++) {
           Path dir = new Path(ymp, String.format("DAY=%02d", d));
           statusList.add(dirStatus(dir));
           for (int h = 0; h < 24; h++) {
             statusList.add(fileStatus(new Path(dir,
                 String.format("%02d00.avro", h))));
           }
         }
       }
       // sort on paths.
       Collections.sort(statusList,
           (l, r) -> l.getPath().compareTo(r.getPath()));
     }
     return statusList;
   }


   private void expectShouldDelete(final Path path, boolean isDir) {
     expectShouldDelete(newStatus(path, isDir));
   }

   private void expectShouldDelete(CopyListingFileStatus status) {
     assertTrue("Expected shouldDelete of " + status.getPath(),
         shouldDelete(status));
   }

   private boolean shouldDelete(final Path path, final boolean isDir) {
     return shouldDelete(newStatus(path, isDir));
   }

   private boolean shouldDelete(final CopyListingFileStatus status) {
     return tracker.shouldDelete(status);
   }

   private void expectShouldNotDelete(final Path path, boolean isDir) {
     expectShouldNotDelete(newStatus(path, isDir));
   }

   private void expectShouldNotDelete(CopyListingFileStatus status) {
     assertFalse("Expected !shouldDelete of " + status.getPath()
             + " but got true",
         shouldDelete(status));
   }

   private CopyListingFileStatus newStatus(final Path path,
       final boolean isDir) {
     return new CopyListingFileStatus(new FileStatus(0, isDir, 0, 0, 0, path));
   }

   private CopyListingFileStatus dirStatus(final Path path) {
     return newStatus(path, true);
   }

   private CopyListingFileStatus fileStatus(final Path path) {
     return newStatus(path, false);
   }

   private void expectCached(final Path path) {
     assertTrue("Path " + path + " is not in the cache of " + tracker,
         tracker.isContained(path));
   }

   private void expectNotCached(final Path path) {
     assertFalse("Path " + path + " is in the cache of " + tracker,
         tracker.isContained(path));
   }

 }
	/*
	* 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.hadoop.tools.mapred;

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.List;
	import java.util.concurrent.atomic.AtomicInteger;

	import org.junit.After;
	import org.junit.Assert;
	import org.junit.Before;
	import org.junit.Test;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	import org.apache.hadoop.fs.FileStatus;
	import org.apache.hadoop.fs.Path;
	import org.apache.hadoop.tools.CopyListingFileStatus;

	/**
	* Unit tests of the deleted directory tracker.
	*/
	@SuppressWarnings("RedundantThrows")
	public class TestDeletedDirTracker extends Assert {

	private static final Logger LOG =
	LoggerFactory.getLogger(TestDeletedDirTracker.class);

	public static final Path ROOT = new Path("hdfs://namenode/");

	public static final Path DIR1 = new Path(ROOT, "dir1");

	public static final Path FILE0 = new Path(ROOT, "file0");

	public static final Path DIR1_FILE1 = new Path(DIR1, "file1");

	public static final Path DIR1_FILE2 = new Path(DIR1, "file2");

	public static final Path DIR1_DIR3 = new Path(DIR1, "dir3");

	public static final Path DIR1_DIR3_DIR4 = new Path(DIR1_DIR3, "dir4");

	public static final Path DIR1_DIR3_DIR4_FILE_3 =
	new Path(DIR1_DIR3_DIR4, "file1");


	private DeletedDirTracker tracker;

	@Before
	public void setup() {
	tracker = new DeletedDirTracker(1000);
	}

	@After
	public void teardown() {
	LOG.info(tracker.toString());
	}

	@Test(expected = IllegalArgumentException.class)
	public void testNoRootDir() throws Throwable {
	shouldDelete(ROOT, true);
	}

	@Test(expected = IllegalArgumentException.class)
	public void testNoRootFile() throws Throwable {
	shouldDelete(dirStatus(ROOT));
	}

	@Test
	public void testFileInRootDir() throws Throwable {
	expectShouldDelete(FILE0, false);
	expectShouldDelete(FILE0, false);
	}

	@Test
	public void testDeleteDir1() throws Throwable {
	expectShouldDelete(DIR1, true);
	expectShouldNotDelete(DIR1, true);
	expectShouldNotDelete(DIR1_FILE1, false);
	expectNotCached(DIR1_FILE1);
	expectShouldNotDelete(DIR1_DIR3, true);
	expectCached(DIR1_DIR3);
	expectShouldNotDelete(DIR1_FILE2, false);
	expectShouldNotDelete(DIR1_DIR3_DIR4_FILE_3, false);
	expectShouldNotDelete(DIR1_DIR3_DIR4, true);
	expectShouldNotDelete(DIR1_DIR3_DIR4, true);
	}

	@Test
	public void testDeleteDirDeep() throws Throwable {
	expectShouldDelete(DIR1, true);
	expectShouldNotDelete(DIR1_DIR3_DIR4_FILE_3, false);
	}

	@Test
	public void testDeletePerfectCache() throws Throwable {
	// run a larger scale test. Also use the ordering we'd expect for a sorted
	// listing, which we implement by sorting the paths
	List<CopyListingFileStatus> statusList = buildStatusList();
	// cache is bigger than the status list
	tracker = new DeletedDirTracker(statusList.size());

	AtomicInteger deletedFiles = new AtomicInteger(0);
	AtomicInteger deletedDirs = new AtomicInteger(0);
	deletePaths(statusList, deletedFiles, deletedDirs);
	assertEquals(0, deletedFiles.get());
	}

	@Test
	public void testDeleteFullCache() throws Throwable {
	// run a larger scale test. Also use the ordering we'd expect for a sorted
	// listing, which we implement by sorting the paths
	AtomicInteger deletedFiles = new AtomicInteger(0);
	AtomicInteger deletedDirs = new AtomicInteger(0);
	deletePaths(buildStatusList(), deletedFiles, deletedDirs);
	assertEquals(0, deletedFiles.get());
	}

	@Test
	public void testDeleteMediumCache() throws Throwable {
	tracker = new DeletedDirTracker(100);
	AtomicInteger deletedFiles = new AtomicInteger(0);
	AtomicInteger deletedDirs = new AtomicInteger(0);
	deletePaths(buildStatusList(), deletedFiles, deletedDirs);
	assertEquals(0, deletedFiles.get());
	}

	@Test
	public void testDeleteFullSmallCache() throws Throwable {
	tracker = new DeletedDirTracker(10);
	AtomicInteger deletedFiles = new AtomicInteger(0);
	AtomicInteger deletedDirs = new AtomicInteger(0);
	deletePaths(buildStatusList(), deletedFiles, deletedDirs);
	assertEquals(0, deletedFiles.get());
	}

	protected void deletePaths(final List<CopyListingFileStatus> statusList,
	final AtomicInteger deletedFiles, final AtomicInteger deletedDirs) {
	for (CopyListingFileStatus status : statusList) {
	if (shouldDelete(status)) {
	AtomicInteger r = status.isDirectory() ? deletedDirs : deletedFiles;
	r.incrementAndGet();
	LOG.info("Delete {}", status.getPath());
	}
	}

	LOG.info("After proposing to delete {} paths, {} directories and {} files"
	+ " were explicitly deleted from a cache {}",
	statusList.size(), deletedDirs, deletedFiles, tracker);
	}

	/**
	* Build a large YMD status list; 30 * 12 * 10 directories,
	* each with 24 files.
	* @return a sorted list.
	*/
	protected List<CopyListingFileStatus> buildStatusList() {
	List<CopyListingFileStatus> statusList = new ArrayList<>();
	// recursive create of many files
	for (int y = 0; y <= 20; y++) {
	Path yp = new Path(String.format("YEAR=%d", y));
	statusList.add(dirStatus(yp));
	for (int m = 1; m <= 12; m++) {
	Path ymp = new Path(yp, String.format("MONTH=%d", m));
	statusList.add(dirStatus(ymp));
	for (int d = 1; d < 30; d++) {
	Path dir = new Path(ymp, String.format("DAY=%02d", d));
	statusList.add(dirStatus(dir));
	for (int h = 0; h < 24; h++) {
	statusList.add(fileStatus(new Path(dir,
	String.format("%02d00.avro", h))));
	}
	}
	}
	// sort on paths.
	Collections.sort(statusList,
	(l, r) -> l.getPath().compareTo(r.getPath()));
	}
	return statusList;
	}


	private void expectShouldDelete(final Path path, boolean isDir) {
	expectShouldDelete(newStatus(path, isDir));
	}

	private void expectShouldDelete(CopyListingFileStatus status) {
	assertTrue("Expected shouldDelete of " + status.getPath(),
	shouldDelete(status));
	}

	private boolean shouldDelete(final Path path, final boolean isDir) {
	return shouldDelete(newStatus(path, isDir));
	}

	private boolean shouldDelete(final CopyListingFileStatus status) {
	return tracker.shouldDelete(status);
	}

	private void expectShouldNotDelete(final Path path, boolean isDir) {
	expectShouldNotDelete(newStatus(path, isDir));
	}

	private void expectShouldNotDelete(CopyListingFileStatus status) {
	assertFalse("Expected !shouldDelete of " + status.getPath()
	+ " but got true",
	shouldDelete(status));
	}

	private CopyListingFileStatus newStatus(final Path path,
	final boolean isDir) {
	return new CopyListingFileStatus(new FileStatus(0, isDir, 0, 0, 0, path));
	}

	private CopyListingFileStatus dirStatus(final Path path) {
	return newStatus(path, true);
	}

	private CopyListingFileStatus fileStatus(final Path path) {
	return newStatus(path, false);
	}

	private void expectCached(final Path path) {
	assertTrue("Path " + path + " is not in the cache of " + tracker,
	tracker.isContained(path));
	}

	private void expectNotCached(final Path path) {
	assertFalse("Path " + path + " is in the cache of " + tracker,
	tracker.isContained(path));
	}

	}