| /* |
| * 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.fs.s3a; |
| |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.LocatedFileStatus; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.RemoteIterator; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| import java.util.Set; |
| |
| import static org.apache.hadoop.fs.s3a.Listing.ACCEPT_ALL; |
| import static org.apache.hadoop.fs.s3a.Listing.ProvidedFileStatusIterator; |
| |
| /** |
| * Place for the S3A listing classes; keeps all the small classes under control. |
| */ |
| public class TestListing extends AbstractS3AMockTest { |
| |
| private static class MockRemoteIterator<FileStatus> implements |
| RemoteIterator<FileStatus> { |
| private Iterator<FileStatus> iterator; |
| |
| MockRemoteIterator(Collection<FileStatus> source) { |
| iterator = source.iterator(); |
| } |
| |
| public boolean hasNext() { |
| return iterator.hasNext(); |
| } |
| |
| public FileStatus next() { |
| return iterator.next(); |
| } |
| } |
| |
| private FileStatus blankFileStatus(Path path) { |
| return new FileStatus(0, true, 0, 0, 0, path); |
| } |
| |
| @Test |
| public void testTombstoneReconcilingIterator() throws Exception { |
| Path parent = new Path("/parent"); |
| Path liveChild = new Path(parent, "/liveChild"); |
| Path deletedChild = new Path(parent, "/deletedChild"); |
| Path[] allFiles = {parent, liveChild, deletedChild}; |
| Path[] liveFiles = {parent, liveChild}; |
| |
| Listing listing = new Listing(fs); |
| Collection<FileStatus> statuses = new ArrayList<>(); |
| statuses.add(blankFileStatus(parent)); |
| statuses.add(blankFileStatus(liveChild)); |
| statuses.add(blankFileStatus(deletedChild)); |
| |
| Set<Path> tombstones = new HashSet<>(); |
| tombstones.add(deletedChild); |
| |
| RemoteIterator<FileStatus> sourceIterator = new MockRemoteIterator( |
| statuses); |
| RemoteIterator<LocatedFileStatus> locatedIterator = |
| listing.createLocatedFileStatusIterator(sourceIterator); |
| RemoteIterator<LocatedFileStatus> reconcilingIterator = |
| listing.createTombstoneReconcilingIterator(locatedIterator, tombstones); |
| |
| Set<Path> expectedPaths = new HashSet<>(); |
| expectedPaths.add(parent); |
| expectedPaths.add(liveChild); |
| |
| Set<Path> actualPaths = new HashSet<>(); |
| while (reconcilingIterator.hasNext()) { |
| actualPaths.add(reconcilingIterator.next().getPath()); |
| } |
| Assert.assertTrue(actualPaths.equals(expectedPaths)); |
| } |
| |
| @Test |
| public void testProvidedFileStatusIteratorEnd() throws Exception { |
| FileStatus[] statuses = { |
| new FileStatus(100, false, 1, 8192, 0, new Path("s3a://blah/blah")) |
| }; |
| ProvidedFileStatusIterator it = new ProvidedFileStatusIterator(statuses, |
| ACCEPT_ALL, new Listing.AcceptAllButS3nDirs()); |
| |
| Assert.assertTrue("hasNext() should return true first time", it.hasNext()); |
| Assert.assertNotNull("first element should not be null", it.next()); |
| Assert.assertFalse("hasNext() should now be false", it.hasNext()); |
| try { |
| it.next(); |
| Assert.fail("next() should have thrown exception"); |
| } catch (NoSuchElementException e) { |
| // Correct behavior. Any other exceptions are propagated as failure. |
| return; |
| } |
| } |
| } |