| /** |
| * 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.net; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.SocketTimeoutException; |
| import java.nio.channels.Pipe; |
| import java.util.Arrays; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import junit.framework.TestCase; |
| |
| /** |
| * This tests timout out from SocketInputStream and |
| * SocketOutputStream using pipes. |
| * |
| * Normal read and write using these streams are tested by pretty much |
| * every DFS unit test. |
| */ |
| public class TestSocketIOWithTimeout extends TestCase { |
| |
| static Log LOG = LogFactory.getLog(TestSocketIOWithTimeout.class); |
| |
| private static int TIMEOUT = 1*1000; |
| private static String TEST_STRING = "1234567890"; |
| |
| private void doIO(InputStream in, OutputStream out) throws IOException { |
| /* Keep on writing or reading until we get SocketTimeoutException. |
| * It expects this exception to occur within 100 millis of TIMEOUT. |
| */ |
| byte buf[] = new byte[4192]; |
| |
| while (true) { |
| long start = System.currentTimeMillis(); |
| try { |
| if (in != null) { |
| in.read(buf); |
| } else { |
| out.write(buf); |
| } |
| } catch (SocketTimeoutException e) { |
| long diff = System.currentTimeMillis() - start; |
| LOG.info("Got SocketTimeoutException as expected after " + |
| diff + " millis : " + e.getMessage()); |
| assertTrue(Math.abs(TIMEOUT - diff) <= 200); |
| break; |
| } |
| } |
| } |
| |
| /** |
| * Just reads one byte from the input stream. |
| */ |
| static class ReadRunnable implements Runnable { |
| private InputStream in; |
| |
| public ReadRunnable(InputStream in) { |
| this.in = in; |
| } |
| public void run() { |
| try { |
| in.read(); |
| } catch (IOException e) { |
| LOG.info("Got expection while reading as expected : " + |
| e.getMessage()); |
| return; |
| } |
| assertTrue(false); |
| } |
| } |
| |
| public void testSocketIOWithTimeout() throws IOException { |
| |
| // first open pipe: |
| Pipe pipe = Pipe.open(); |
| Pipe.SourceChannel source = pipe.source(); |
| Pipe.SinkChannel sink = pipe.sink(); |
| |
| try { |
| InputStream in = new SocketInputStream(source, TIMEOUT); |
| OutputStream out = new SocketOutputStream(sink, TIMEOUT); |
| |
| byte[] writeBytes = TEST_STRING.getBytes(); |
| byte[] readBytes = new byte[writeBytes.length]; |
| |
| out.write(writeBytes); |
| doIO(null, out); |
| |
| in.read(readBytes); |
| assertTrue(Arrays.equals(writeBytes, readBytes)); |
| doIO(in, null); |
| |
| /* |
| * Verify that it handles interrupted threads properly. |
| * Use a large timeout and expect the thread to return quickly. |
| */ |
| in = new SocketInputStream(source, 0); |
| Thread thread = new Thread(new ReadRunnable(in)); |
| thread.start(); |
| |
| try { |
| Thread.sleep(1000); |
| } catch (InterruptedException ignored) {} |
| |
| thread.interrupt(); |
| |
| try { |
| thread.join(); |
| } catch (InterruptedException e) { |
| throw new IOException("Unexpected InterruptedException : " + e); |
| } |
| |
| //make sure the channels are still open |
| assertTrue(source.isOpen()); |
| assertTrue(sink.isOpen()); |
| |
| out.close(); |
| assertFalse(sink.isOpen()); |
| |
| // close sink and expect -1 from source.read() |
| assertEquals(-1, in.read()); |
| |
| // make sure close() closes the underlying channel. |
| in.close(); |
| assertFalse(source.isOpen()); |
| |
| } finally { |
| if (source != null) { |
| source.close(); |
| } |
| if (sink != null) { |
| sink.close(); |
| } |
| } |
| } |
| } |