Java tutorial
/* * 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.accumulo.start.classloader.vfs.providers; import java.io.IOException; import java.util.Map; import org.apache.accumulo.start.test.AccumuloDFSBase; import org.apache.commons.vfs2.FileObject; import org.apache.commons.vfs2.FileSystemException; import org.apache.commons.vfs2.FileType; import org.apache.commons.vfs2.impl.DefaultFileSystemManager; import org.apache.commons.vfs2.util.RandomAccessMode; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import org.junit.After; import org.junit.Assert; import org.junit.Before; import org.junit.Test; public class ReadOnlyHdfsFileProviderTest extends AccumuloDFSBase { private static final String TEST_DIR1 = getHdfsUri() + "/test-dir"; private static final Path DIR1_PATH = new Path("/test-dir"); private static final String TEST_FILE1 = TEST_DIR1 + "/accumulo-test-1.jar"; private static final Path FILE1_PATH = new Path(DIR1_PATH, "accumulo-test-1.jar"); private DefaultFileSystemManager manager = null; private FileSystem hdfs = null; @Before public void setup() throws Exception { manager = new DefaultFileSystemManager(); manager.addProvider("hdfs", new HdfsFileProvider()); manager.init(); this.hdfs = cluster.getFileSystem(); } private FileObject createTestFile(FileSystem hdfs) throws IOException { // Create the directory hdfs.mkdirs(DIR1_PATH); FileObject dir = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(dir); Assert.assertTrue(dir.exists()); Assert.assertTrue(dir.getType().equals(FileType.FOLDER)); // Create the file in the directory hdfs.create(FILE1_PATH).close(); FileObject f = manager.resolveFile(TEST_FILE1); Assert.assertNotNull(f); Assert.assertTrue(f.exists()); Assert.assertTrue(f.getType().equals(FileType.FILE)); return f; } @Test public void testInit() throws Exception { FileObject fo = manager.resolveFile(TEST_FILE1); Assert.assertNotNull(fo); } @Test public void testExistsFails() throws Exception { FileObject fo = manager.resolveFile(TEST_FILE1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); } @Test public void testExistsSucceeds() throws Exception { FileObject fo = manager.resolveFile(TEST_FILE1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the file @SuppressWarnings("unused") FileObject f = createTestFile(hdfs); } @Test(expected = UnsupportedOperationException.class) public void testCanRenameTo() throws Exception { FileObject fo = createTestFile(this.hdfs); Assert.assertNotNull(fo); fo.canRenameTo(fo); } @Test public void testDoListChildren() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); FileObject dir = file.getParent(); FileObject[] children = dir.getChildren(); Assert.assertTrue(children.length == 1); Assert.assertTrue(children[0].getName().equals(file.getName())); } @Test public void testGetContentSize() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); Assert.assertEquals(0, file.getContent().getSize()); } @Test public void testGetInputStream() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); file.getContent().getInputStream().close(); } @Test public void testIsHidden() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); Assert.assertFalse(file.isHidden()); } @Test public void testIsReadable() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); Assert.assertTrue(file.isReadable()); } @Test public void testIsWritable() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); Assert.assertFalse(file.isWriteable()); } @Test public void testLastModificationTime() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); Assert.assertFalse(-1 == file.getContent().getLastModifiedTime()); } @Test public void testGetAttributes() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); Map<String, Object> attributes = file.getContent().getAttributes(); Assert.assertTrue(attributes.containsKey(HdfsFileAttributes.BLOCK_SIZE.toString())); Assert.assertTrue(attributes.containsKey(HdfsFileAttributes.GROUP.toString())); Assert.assertTrue(attributes.containsKey(HdfsFileAttributes.LAST_ACCESS_TIME.toString())); Assert.assertTrue(attributes.containsKey(HdfsFileAttributes.LENGTH.toString())); Assert.assertTrue(attributes.containsKey(HdfsFileAttributes.MODIFICATION_TIME.toString())); Assert.assertTrue(attributes.containsKey(HdfsFileAttributes.OWNER.toString())); Assert.assertTrue(attributes.containsKey(HdfsFileAttributes.PERMISSIONS.toString())); } @Test(expected = FileSystemException.class) public void testRandomAccessContent() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); file.getContent().getRandomAccessContent(RandomAccessMode.READWRITE).close(); } @Test public void testRandomAccessContent2() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); file.getContent().getRandomAccessContent(RandomAccessMode.READ).close(); } @Test public void testEquals() throws Exception { FileObject fo = manager.resolveFile(TEST_DIR1); Assert.assertNotNull(fo); Assert.assertFalse(fo.exists()); // Create the test file FileObject file = createTestFile(hdfs); // Get a handle to the same file FileObject file2 = manager.resolveFile(TEST_FILE1); Assert.assertEquals(file, file2); } @After public void tearDown() throws Exception { if (null != hdfs) { hdfs.delete(DIR1_PATH, true); hdfs.close(); } manager.close(); } }