| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.ipc; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.util.Random; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.FutureTask; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.locks.Condition; |
| import java.util.concurrent.locks.ReentrantLock; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.net.NetUtils; |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class TestRpcServerHandoff { |
| |
| public static final Logger LOG = |
| LoggerFactory.getLogger(TestRpcServerHandoff.class); |
| |
| private static final String BIND_ADDRESS = "0.0.0.0"; |
| private static final Configuration conf = new Configuration(); |
| |
| |
| public static class ServerForHandoffTest extends Server { |
| |
| private final AtomicBoolean invoked = new AtomicBoolean(false); |
| private final ReentrantLock lock = new ReentrantLock(); |
| private final Condition invokedCondition = lock.newCondition(); |
| |
| private volatile Writable request; |
| private volatile Call deferredCall; |
| |
| protected ServerForHandoffTest(int handlerCount) throws IOException { |
| super(BIND_ADDRESS, 0, BytesWritable.class, handlerCount, conf); |
| } |
| |
| @Override |
| public Writable call(RPC.RpcKind rpcKind, String protocol, Writable param, |
| long receiveTime) throws Exception { |
| request = param; |
| deferredCall = Server.getCurCall().get(); |
| Server.getCurCall().get().deferResponse(); |
| lock.lock(); |
| try { |
| invoked.set(true); |
| invokedCondition.signal(); |
| } finally { |
| lock.unlock(); |
| } |
| return null; |
| } |
| |
| void awaitInvocation() throws InterruptedException { |
| lock.lock(); |
| try { |
| while (!invoked.get()) { |
| invokedCondition.await(); |
| } |
| } finally { |
| lock.unlock(); |
| } |
| } |
| |
| void sendResponse() { |
| deferredCall.setDeferredResponse(request); |
| } |
| |
| void sendError() { |
| deferredCall.setDeferredError(new IOException("DeferredError")); |
| } |
| } |
| |
| @Test(timeout = 10000) |
| public void testDeferredResponse() throws IOException, InterruptedException, |
| ExecutionException { |
| |
| |
| ServerForHandoffTest server = new ServerForHandoffTest(2); |
| server.start(); |
| try { |
| InetSocketAddress serverAddress = NetUtils.getConnectAddress(server); |
| byte[] requestBytes = generateRandomBytes(1024); |
| ClientCallable clientCallable = |
| new ClientCallable(serverAddress, conf, requestBytes); |
| |
| FutureTask<Writable> future = new FutureTask<Writable>(clientCallable); |
| Thread clientThread = new Thread(future); |
| clientThread.start(); |
| |
| server.awaitInvocation(); |
| awaitResponseTimeout(future); |
| |
| server.sendResponse(); |
| BytesWritable response = (BytesWritable) future.get(); |
| |
| Assert.assertEquals(new BytesWritable(requestBytes), response); |
| } finally { |
| if (server != null) { |
| server.stop(); |
| } |
| } |
| } |
| |
| @Test(timeout = 10000) |
| public void testDeferredException() throws IOException, InterruptedException, |
| ExecutionException { |
| ServerForHandoffTest server = new ServerForHandoffTest(2); |
| server.start(); |
| try { |
| InetSocketAddress serverAddress = NetUtils.getConnectAddress(server); |
| byte[] requestBytes = generateRandomBytes(1024); |
| ClientCallable clientCallable = |
| new ClientCallable(serverAddress, conf, requestBytes); |
| |
| FutureTask<Writable> future = new FutureTask<Writable>(clientCallable); |
| Thread clientThread = new Thread(future); |
| clientThread.start(); |
| |
| server.awaitInvocation(); |
| awaitResponseTimeout(future); |
| |
| server.sendError(); |
| try { |
| future.get(); |
| Assert.fail("Call succeeded. Was expecting an exception"); |
| } catch (ExecutionException e) { |
| Throwable cause = e.getCause(); |
| Assert.assertTrue(cause instanceof RemoteException); |
| RemoteException re = (RemoteException) cause; |
| Assert.assertTrue(re.toString().contains("DeferredError")); |
| } |
| } finally { |
| if (server != null) { |
| server.stop(); |
| } |
| } |
| } |
| |
| private void awaitResponseTimeout(FutureTask<Writable> future) throws |
| ExecutionException, |
| InterruptedException { |
| long sleepTime = 3000L; |
| while (sleepTime > 0) { |
| try { |
| future.get(200L, TimeUnit.MILLISECONDS); |
| Assert.fail("Expected to timeout since" + |
| " the deferred response hasn't been registered"); |
| } catch (TimeoutException e) { |
| // Ignoring. Expected to time out. |
| } |
| sleepTime -= 200L; |
| } |
| LOG.info("Done sleeping"); |
| } |
| |
| private static class ClientCallable implements Callable<Writable> { |
| |
| private final InetSocketAddress address; |
| private final Configuration conf; |
| final byte[] requestBytes; |
| |
| |
| private ClientCallable(InetSocketAddress address, Configuration conf, |
| byte[] requestBytes) { |
| this.address = address; |
| this.conf = conf; |
| this.requestBytes = requestBytes; |
| } |
| |
| @Override |
| public Writable call() throws Exception { |
| Client client = new Client(BytesWritable.class, conf); |
| Writable param = new BytesWritable(requestBytes); |
| final Client.ConnectionId remoteId = |
| Client.ConnectionId.getConnectionId(address, null, |
| null, 0, null, conf); |
| Writable result = client.call(RPC.RpcKind.RPC_BUILTIN, param, remoteId, |
| new AtomicBoolean(false)); |
| return result; |
| } |
| } |
| |
| private byte[] generateRandomBytes(int length) { |
| Random random = new Random(); |
| byte[] bytes = new byte[length]; |
| for (int i = 0; i < length; i++) { |
| bytes[i] = (byte) ('a' + random.nextInt(26)); |
| } |
| return bytes; |
| } |
| } |