| /** |
| * 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.curator.framework.recipes.atomic; |
| |
| import org.apache.curator.RetryPolicy; |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.retry.ExponentialBackoffRetry; |
| import org.apache.curator.retry.RetryOneTime; |
| import org.apache.commons.math.stat.descriptive.SummaryStatistics; |
| import org.apache.commons.math.stat.descriptive.SynchronizedSummaryStatistics; |
| import org.apache.curator.test.BaseClassForTests; |
| import org.apache.curator.utils.CloseableUtils; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| import org.testng.collections.Lists; |
| import java.nio.BufferOverflowException; |
| import java.nio.BufferUnderflowException; |
| import java.util.List; |
| import java.util.Random; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| public class TestDistributedAtomicLong extends BaseClassForTests |
| { |
| @Test |
| public void testCorruptedValue() throws Exception |
| { |
| final CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| client.create().forPath("/counter", "foo".getBytes()); |
| DistributedAtomicLong dal = new DistributedAtomicLong(client, "/counter", new RetryOneTime(1)); |
| try |
| { |
| dal.get().postValue(); |
| } |
| catch ( BufferUnderflowException e ) |
| { |
| Assert.fail("", e); |
| } |
| catch ( BufferOverflowException e ) |
| { |
| Assert.fail("", e); |
| } |
| catch ( RuntimeException e ) |
| { |
| // correct |
| } |
| } |
| finally |
| { |
| client.close(); |
| } |
| } |
| |
| @Test |
| public void testCompareAndSetWithFreshInstance() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| DistributedAtomicLong dal = new DistributedAtomicLong(client, "/counter", new RetryOneTime(1)); |
| AtomicValue<Long> result = dal.compareAndSet(0L, 1L); |
| Assert.assertFalse(result.succeeded()); |
| |
| Assert.assertTrue(dal.initialize(0L)); |
| result = dal.compareAndSet(0L, 1L); |
| Assert.assertTrue(result.succeeded()); |
| |
| Assert.assertFalse(dal.initialize(0L)); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testCompareAndSet() throws Exception |
| { |
| final CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| final AtomicBoolean doIncrement = new AtomicBoolean(false); |
| DistributedAtomicLong dal = new DistributedAtomicLong(client, "/counter", new RetryOneTime(1)) |
| { |
| @Override |
| public byte[] valueToBytes(Long newValue) |
| { |
| if ( doIncrement.get() ) |
| { |
| DistributedAtomicLong inc = new DistributedAtomicLong(client, "/counter", new RetryOneTime(1)); |
| try |
| { |
| // this will force a bad version exception |
| inc.increment(); |
| } |
| catch ( Exception e ) |
| { |
| throw new Error(e); |
| } |
| } |
| |
| return super.valueToBytes(newValue); |
| } |
| }; |
| dal.forceSet(1L); |
| |
| Assert.assertTrue(dal.compareAndSet(1L, 5L).succeeded()); |
| Assert.assertFalse(dal.compareAndSet(1L, 5L).succeeded()); |
| |
| doIncrement.set(true); |
| Assert.assertFalse(dal.compareAndSet(5L, 10L).succeeded()); |
| } |
| finally |
| { |
| client.close(); |
| } |
| } |
| |
| @Test |
| public void testForceSet() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| final DistributedAtomicLong dal = new DistributedAtomicLong(client, "/counter", new RetryOneTime(1)); |
| |
| ExecutorService executorService = Executors.newFixedThreadPool(2); |
| executorService.submit |
| ( |
| new Callable<Object>() |
| { |
| @Override |
| public Object call() throws Exception |
| { |
| for ( int i = 0; i < 1000; ++i ) |
| { |
| dal.increment(); |
| Thread.sleep(10); |
| } |
| return null; |
| } |
| } |
| ); |
| executorService.submit |
| ( |
| new Callable<Object>() |
| { |
| @Override |
| public Object call() throws Exception |
| { |
| for ( int i = 0; i < 1000; ++i ) |
| { |
| dal.forceSet(0L); |
| Thread.sleep(10); |
| } |
| return null; |
| } |
| } |
| ); |
| |
| Assert.assertTrue(dal.get().preValue() < 10); |
| } |
| finally |
| { |
| client.close(); |
| } |
| } |
| |
| @Test |
| public void testSimulation() throws Exception |
| { |
| final int threadQty = 20; |
| final int executionQty = 50; |
| |
| final AtomicInteger optimisticTries = new AtomicInteger(); |
| final AtomicInteger promotedLockTries = new AtomicInteger(); |
| final AtomicInteger failures = new AtomicInteger(); |
| final AtomicInteger errors = new AtomicInteger(); |
| |
| final SummaryStatistics timingStats = new SynchronizedSummaryStatistics(); |
| List<Future<Void>> procs = Lists.newArrayList(); |
| ExecutorService executorService = Executors.newFixedThreadPool(threadQty); |
| for ( int i = 0; i < threadQty; ++i ) |
| { |
| Callable<Void> proc = new Callable<Void>() |
| { |
| @Override |
| public Void call() throws Exception |
| { |
| doSimulation(executionQty, timingStats, optimisticTries, promotedLockTries, failures, errors); |
| return null; |
| } |
| }; |
| procs.add(executorService.submit(proc)); |
| } |
| |
| for ( Future<Void> f : procs ) |
| { |
| f.get(); |
| } |
| |
| System.out.println("OptimisticTries: " + optimisticTries.get()); |
| System.out.println("PromotedLockTries: " + promotedLockTries.get()); |
| System.out.println("Failures: " + failures.get()); |
| System.out.println("Errors: " + errors.get()); |
| System.out.println(); |
| |
| System.out.println("Avg time: " + timingStats.getMean()); |
| System.out.println("Max time: " + timingStats.getMax()); |
| System.out.println("Min time: " + timingStats.getMin()); |
| System.out.println("Qty: " + timingStats.getN()); |
| |
| Assert.assertEquals(errors.get(), 0); |
| Assert.assertTrue(optimisticTries.get() > 0); |
| Assert.assertTrue(promotedLockTries.get() > 0); |
| } |
| |
| @Test |
| public void testBasic() throws Exception |
| { |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| DistributedAtomicLong dal = new DistributedAtomicLong(client, "/foo/bar/counter", new RetryOneTime(1)); |
| |
| AtomicValue<Long> value = dal.increment(); |
| Assert.assertTrue(value.succeeded()); |
| Assert.assertEquals(value.getStats().getOptimisticTries(), 1); |
| Assert.assertEquals(value.getStats().getPromotedLockTries(), 0); |
| Assert.assertEquals(value.preValue().longValue(), 0L); |
| Assert.assertEquals(value.postValue().longValue(), 1L); |
| |
| value = dal.decrement(); |
| Assert.assertTrue(value.succeeded()); |
| Assert.assertEquals(value.getStats().getOptimisticTries(), 1); |
| Assert.assertEquals(value.getStats().getPromotedLockTries(), 0); |
| Assert.assertEquals(value.preValue().longValue(), 1L); |
| Assert.assertEquals(value.postValue().longValue(), 0L); |
| |
| value = dal.add(10L); |
| Assert.assertTrue(value.succeeded()); |
| Assert.assertEquals(value.getStats().getOptimisticTries(), 1); |
| Assert.assertEquals(value.getStats().getPromotedLockTries(), 0); |
| Assert.assertEquals(value.preValue().longValue(), 0L); |
| Assert.assertEquals(value.postValue().longValue(), 10L); |
| |
| value = dal.subtract(5L); |
| Assert.assertTrue(value.succeeded()); |
| Assert.assertEquals(value.getStats().getOptimisticTries(), 1); |
| Assert.assertEquals(value.getStats().getPromotedLockTries(), 0); |
| Assert.assertEquals(value.preValue().longValue(), 10L); |
| Assert.assertEquals(value.postValue().longValue(), 5L); |
| } |
| finally |
| { |
| client.close(); |
| } |
| } |
| |
| private void doSimulation(int executionQty, SummaryStatistics timingStats, AtomicInteger optimisticTries, AtomicInteger promotedLockTries, AtomicInteger failures, AtomicInteger errors) throws Exception |
| { |
| Random random = new Random(); |
| long previousValue = -1; |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1)); |
| client.start(); |
| try |
| { |
| RetryPolicy retryPolicy = new ExponentialBackoffRetry(3, 3); |
| PromotedToLock.Builder builder = PromotedToLock.builder().lockPath("/lock").retryPolicy(retryPolicy); |
| |
| DistributedAtomicLong dal = new DistributedAtomicLong(client, "/counter", retryPolicy, builder.build()); |
| for ( int i = 0; i < executionQty; ++i ) |
| { |
| Thread.sleep(random.nextInt(10)); |
| |
| long start = System.currentTimeMillis(); |
| AtomicValue<Long> value = dal.increment(); |
| long elapsed = System.currentTimeMillis() - start; |
| timingStats.addValue(elapsed); |
| |
| if ( value.succeeded() ) |
| { |
| if ( value.postValue() <= previousValue ) |
| { |
| errors.incrementAndGet(); |
| } |
| |
| previousValue = value.postValue(); |
| } |
| else |
| { |
| failures.incrementAndGet(); |
| } |
| |
| optimisticTries.addAndGet(value.getStats().getOptimisticTries()); |
| promotedLockTries.addAndGet(value.getStats().getPromotedLockTries()); |
| } |
| } |
| finally |
| { |
| client.close(); |
| } |
| } |
| } |