| /** |
| * |
| * 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.hbase; |
| |
| import java.util.Set; |
| import java.util.HashSet; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| |
| public abstract class MultithreadedTestUtil { |
| |
| public static final Log LOG = |
| LogFactory.getLog(MultithreadedTestUtil.class); |
| |
| public static class TestContext { |
| private final Configuration conf; |
| private Throwable err = null; |
| private boolean stopped = false; |
| private int threadDoneCount = 0; |
| private Set<TestThread> testThreads = new HashSet<TestThread>(); |
| |
| public TestContext(Configuration configuration) { |
| this.conf = configuration; |
| } |
| |
| protected Configuration getConf() { |
| return conf; |
| } |
| |
| public synchronized boolean shouldRun() { |
| return !stopped && err == null; |
| } |
| |
| public void addThread(TestThread t) { |
| testThreads.add(t); |
| } |
| |
| public void startThreads() { |
| for (TestThread t : testThreads) { |
| t.start(); |
| } |
| } |
| |
| public void waitFor(long millis) throws Exception { |
| long endTime = System.currentTimeMillis() + millis; |
| while (!stopped) { |
| long left = endTime - System.currentTimeMillis(); |
| if (left <= 0) break; |
| synchronized (this) { |
| checkException(); |
| wait(left); |
| } |
| } |
| } |
| private synchronized void checkException() throws Exception { |
| if (err != null) { |
| throw new RuntimeException("Deferred", err); |
| } |
| } |
| |
| public synchronized void threadFailed(Throwable t) { |
| if (err == null) err = t; |
| LOG.error("Failed!", err); |
| notify(); |
| } |
| |
| public synchronized void threadDone() { |
| threadDoneCount++; |
| } |
| |
| public void setStopFlag(boolean s) throws Exception { |
| synchronized (this) { |
| stopped = s; |
| } |
| } |
| |
| public void stop() throws Exception { |
| synchronized (this) { |
| stopped = true; |
| } |
| for (TestThread t : testThreads) { |
| t.join(); |
| } |
| checkException(); |
| } |
| } |
| |
| /** |
| * A thread that can be added to a test context, and properly |
| * passes exceptions through. |
| */ |
| public static abstract class TestThread extends Thread { |
| protected final TestContext ctx; |
| protected boolean stopped; |
| |
| public TestThread(TestContext ctx) { |
| this.ctx = ctx; |
| } |
| |
| public void run() { |
| try { |
| doWork(); |
| } catch (Throwable t) { |
| ctx.threadFailed(t); |
| } |
| ctx.threadDone(); |
| } |
| |
| public abstract void doWork() throws Exception; |
| |
| protected void stopTestThread() { |
| this.stopped = true; |
| } |
| } |
| |
| /** |
| * A test thread that performs a repeating operation. |
| */ |
| public static abstract class RepeatingTestThread extends TestThread { |
| public RepeatingTestThread(TestContext ctx) { |
| super(ctx); |
| } |
| |
| public final void doWork() throws Exception { |
| while (ctx.shouldRun() && !stopped) { |
| doAnAction(); |
| } |
| } |
| |
| public abstract void doAnAction() throws Exception; |
| } |
| } |