| /** |
| * 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.hdfs; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| |
| import junit.framework.Assert; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
| import org.apache.hadoop.hdfs.protocol.ExtendedBlock; |
| import org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier; |
| import org.apache.hadoop.hdfs.net.Peer; |
| import org.apache.hadoop.security.token.Token; |
| import org.junit.Test; |
| import org.mockito.Matchers; |
| import org.mockito.Mockito; |
| import org.mockito.invocation.InvocationOnMock; |
| import org.mockito.stubbing.Answer; |
| |
| /** |
| * This class tests the client connection caching in a single node |
| * mini-cluster. |
| */ |
| public class TestConnCache { |
| static final Log LOG = LogFactory.getLog(TestConnCache.class); |
| |
| static final int BLOCK_SIZE = 4096; |
| static final int FILE_SIZE = 3 * BLOCK_SIZE; |
| |
| /** |
| * A mock Answer to remember the BlockReader used. |
| * |
| * It verifies that all invocation to DFSInputStream.getBlockReader() |
| * use the same peer. |
| */ |
| private class MockGetBlockReader implements Answer<RemoteBlockReader2> { |
| public RemoteBlockReader2 reader = null; |
| private Peer peer = null; |
| |
| @Override |
| public RemoteBlockReader2 answer(InvocationOnMock invocation) throws Throwable { |
| RemoteBlockReader2 prevReader = reader; |
| reader = (RemoteBlockReader2) invocation.callRealMethod(); |
| if (peer == null) { |
| peer = reader.getPeer(); |
| } else if (prevReader != null) { |
| Assert.assertSame("DFSInputStream should use the same peer", |
| peer, reader.getPeer()); |
| } |
| return reader; |
| } |
| } |
| |
| /** |
| * (Optionally) seek to position, read and verify data. |
| * |
| * Seek to specified position if pos is non-negative. |
| */ |
| private void pread(DFSInputStream in, |
| long pos, |
| byte[] buffer, |
| int offset, |
| int length, |
| byte[] authenticData) |
| throws IOException { |
| Assert.assertTrue("Test buffer too small", buffer.length >= offset + length); |
| |
| if (pos >= 0) |
| in.seek(pos); |
| |
| LOG.info("Reading from file of size " + in.getFileLength() + |
| " at offset " + in.getPos()); |
| |
| while (length > 0) { |
| int cnt = in.read(buffer, offset, length); |
| Assert.assertTrue("Error in read", cnt > 0); |
| offset += cnt; |
| length -= cnt; |
| } |
| |
| // Verify |
| for (int i = 0; i < length; ++i) { |
| byte actual = buffer[i]; |
| byte expect = authenticData[(int)pos + i]; |
| assertEquals("Read data mismatch at file offset " + (pos + i) + |
| ". Expects " + expect + "; got " + actual, |
| actual, expect); |
| } |
| } |
| |
| /** |
| * Read a file served entirely from one DN. Seek around and read from |
| * different offsets. And verify that they all use the same socket. |
| * @throws Exception |
| */ |
| @Test |
| @SuppressWarnings("unchecked") |
| public void testReadFromOneDN() throws Exception { |
| BlockReaderTestUtil util = new BlockReaderTestUtil(1, |
| new HdfsConfiguration()); |
| final Path testFile = new Path("/testConnCache.dat"); |
| byte authenticData[] = util.writeFile(testFile, FILE_SIZE / 1024); |
| DFSClient client = new DFSClient( |
| new InetSocketAddress("localhost", |
| util.getCluster().getNameNodePort()), util.getConf()); |
| DFSInputStream in = Mockito.spy(client.open(testFile.toString())); |
| LOG.info("opened " + testFile.toString()); |
| byte[] dataBuf = new byte[BLOCK_SIZE]; |
| |
| MockGetBlockReader answer = new MockGetBlockReader(); |
| Mockito.doAnswer(answer).when(in).getBlockReader( |
| (InetSocketAddress) Matchers.anyObject(), |
| (DatanodeInfo) Matchers.anyObject(), |
| Matchers.anyString(), |
| (ExtendedBlock) Matchers.anyObject(), |
| (Token<BlockTokenIdentifier>) Matchers.anyObject(), |
| Matchers.anyLong(), |
| Matchers.anyLong(), |
| Matchers.anyInt(), |
| Matchers.anyBoolean(), |
| Matchers.anyString()); |
| |
| // Initial read |
| pread(in, 0, dataBuf, 0, dataBuf.length, authenticData); |
| // Read again and verify that the socket is the same |
| pread(in, FILE_SIZE - dataBuf.length, dataBuf, 0, dataBuf.length, |
| authenticData); |
| pread(in, 1024, dataBuf, 0, dataBuf.length, authenticData); |
| // No seek; just read |
| pread(in, -1, dataBuf, 0, dataBuf.length, authenticData); |
| pread(in, 64, dataBuf, 0, dataBuf.length / 2, authenticData); |
| |
| in.close(); |
| } |
| } |