| /** |
| * 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.locks; |
| |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.framework.recipes.leader.LeaderLatch; |
| import org.apache.curator.retry.ExponentialBackoffRetry; |
| import org.apache.curator.retry.RetryOneTime; |
| import org.apache.curator.test.BaseClassForTests; |
| import org.apache.curator.test.TestingServer; |
| import org.apache.curator.test.Timing; |
| import org.apache.curator.utils.CloseableUtils; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.data.Stat; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| import java.util.Random; |
| import java.util.concurrent.CountDownLatch; |
| |
| public class TestChildReaper extends BaseClassForTests |
| { |
| @Test |
| public void testMaxChildren() throws Exception |
| { |
| server.close(); |
| |
| final int LARGE_QTY = 10000; |
| |
| System.setProperty("jute.maxbuffer", "" + LARGE_QTY); |
| server = new TestingServer(); |
| try |
| { |
| Timing timing = new Timing(); |
| ChildReaper reaper = null; |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new ExponentialBackoffRetry(100, 3)); |
| try |
| { |
| client.start(); |
| |
| for ( int i = 0; i < LARGE_QTY; ++i ) |
| { |
| if ( (i % 1000) == 0 ) |
| { |
| System.out.println(i); |
| } |
| client.create().creatingParentsIfNeeded().forPath("/big/node-" + i); |
| } |
| |
| try |
| { |
| client.getChildren().forPath("/big"); |
| Assert.fail("Should have been a connection loss"); |
| } |
| catch ( KeeperException.ConnectionLossException e ) |
| { |
| // expected |
| } |
| |
| final CountDownLatch latch = new CountDownLatch(1); |
| reaper = new ChildReaper(client, "/big", Reaper.Mode.REAP_UNTIL_DELETE, 1) |
| { |
| @Override |
| protected void warnMaxChildren(String path, Stat stat) |
| { |
| latch.countDown(); |
| super.warnMaxChildren(path, stat); |
| } |
| }; |
| reaper.setMaxChildren(100); |
| reaper.start(); |
| Assert.assertTrue(timing.awaitLatch(latch)); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(reaper); |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| finally |
| { |
| System.clearProperty("jute.maxbuffer"); |
| } |
| } |
| |
| @Test |
| public void testLargeNodes() throws Exception |
| { |
| server.close(); |
| |
| final int LARGE_QTY = 10000; |
| final int SMALL_QTY = 100; |
| |
| System.setProperty("jute.maxbuffer", "" + LARGE_QTY); |
| server = new TestingServer(); |
| try |
| { |
| Timing timing = new Timing(); |
| ChildReaper reaper = null; |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new ExponentialBackoffRetry(100, 3)); |
| try |
| { |
| client.start(); |
| |
| for ( int i = 0; i < LARGE_QTY; ++i ) |
| { |
| if ( (i % 1000) == 0 ) |
| { |
| System.out.println(i); |
| } |
| client.create().creatingParentsIfNeeded().forPath("/big/node-" + i); |
| |
| if ( i < SMALL_QTY ) |
| { |
| client.create().creatingParentsIfNeeded().forPath("/small/node-" + i); |
| } |
| } |
| |
| reaper = new ChildReaper(client, "/foo", Reaper.Mode.REAP_UNTIL_DELETE, 1); |
| reaper.start(); |
| |
| reaper.addPath("/big"); |
| reaper.addPath("/small"); |
| |
| int count = -1; |
| for ( int i = 0; (i < 10) && (count != 0); ++i ) |
| { |
| timing.sleepABit(); |
| count = client.checkExists().forPath("/small").getNumChildren(); |
| } |
| Assert.assertEquals(count, 0); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(reaper); |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| finally |
| { |
| System.clearProperty("jute.maxbuffer"); |
| } |
| } |
| |
| @Test |
| public void testSomeNodes() throws Exception |
| { |
| Timing timing = new Timing(); |
| ChildReaper reaper = null; |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| |
| Random r = new Random(); |
| int nonEmptyNodes = 0; |
| for ( int i = 0; i < 10; ++i ) |
| { |
| client.create().creatingParentsIfNeeded().forPath("/test/" + Integer.toString(i)); |
| if ( r.nextBoolean() ) |
| { |
| client.create().forPath("/test/" + Integer.toString(i) + "/foo"); |
| ++nonEmptyNodes; |
| } |
| } |
| |
| reaper = new ChildReaper(client, "/test", Reaper.Mode.REAP_UNTIL_DELETE, 1); |
| reaper.start(); |
| |
| timing.forWaiting().sleepABit(); |
| |
| Stat stat = client.checkExists().forPath("/test"); |
| Assert.assertEquals(stat.getNumChildren(), nonEmptyNodes); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(reaper); |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testSimple() throws Exception |
| { |
| Timing timing = new Timing(); |
| ChildReaper reaper = null; |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| |
| for ( int i = 0; i < 10; ++i ) |
| { |
| client.create().creatingParentsIfNeeded().forPath("/test/" + Integer.toString(i)); |
| } |
| |
| reaper = new ChildReaper(client, "/test", Reaper.Mode.REAP_UNTIL_DELETE, 1); |
| reaper.start(); |
| |
| timing.forWaiting().sleepABit(); |
| |
| Stat stat = client.checkExists().forPath("/test"); |
| Assert.assertEquals(stat.getNumChildren(), 0); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(reaper); |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testLeaderElection() throws Exception |
| { |
| Timing timing = new Timing(); |
| ChildReaper reaper = null; |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| LeaderLatch otherLeader = null; |
| try |
| { |
| client.start(); |
| |
| for ( int i = 0; i < 10; ++i ) |
| { |
| client.create().creatingParentsIfNeeded().forPath("/test/" + Integer.toString(i)); |
| } |
| |
| otherLeader = new LeaderLatch(client, "/test-leader"); |
| otherLeader.start(); |
| otherLeader.await(); |
| |
| reaper = new ChildReaper(client, "/test", Reaper.Mode.REAP_UNTIL_DELETE, ChildReaper.newExecutorService(), 1, "/test-leader"); |
| reaper.start(); |
| |
| timing.forWaiting().sleepABit(); |
| |
| //Should not have reaped anything at this point since otherLeader is still leader |
| Stat stat = client.checkExists().forPath("/test"); |
| Assert.assertEquals(stat.getNumChildren(), 10); |
| |
| CloseableUtils.closeQuietly(otherLeader); |
| |
| timing.forWaiting().sleepABit(); |
| |
| stat = client.checkExists().forPath("/test"); |
| Assert.assertEquals(stat.getNumChildren(), 0); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(reaper); |
| if ( otherLeader != null && otherLeader.getState() == LeaderLatch.State.STARTED ) |
| { |
| CloseableUtils.closeQuietly(otherLeader); |
| } |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testMultiPath() throws Exception |
| { |
| Timing timing = new Timing(); |
| ChildReaper reaper = null; |
| CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1)); |
| try |
| { |
| client.start(); |
| |
| for ( int i = 0; i < 10; ++i ) |
| { |
| client.create().creatingParentsIfNeeded().forPath("/test1/" + Integer.toString(i)); |
| client.create().creatingParentsIfNeeded().forPath("/test2/" + Integer.toString(i)); |
| client.create().creatingParentsIfNeeded().forPath("/test3/" + Integer.toString(i)); |
| } |
| |
| reaper = new ChildReaper(client, "/test2", Reaper.Mode.REAP_UNTIL_DELETE, 1); |
| reaper.start(); |
| reaper.addPath("/test1"); |
| |
| timing.forWaiting().sleepABit(); |
| |
| Stat stat = client.checkExists().forPath("/test1"); |
| Assert.assertEquals(stat.getNumChildren(), 0); |
| stat = client.checkExists().forPath("/test2"); |
| Assert.assertEquals(stat.getNumChildren(), 0); |
| stat = client.checkExists().forPath("/test3"); |
| Assert.assertEquals(stat.getNumChildren(), 10); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(reaper); |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Test |
| public void testNamespace() throws Exception |
| { |
| Timing timing = new Timing(); |
| ChildReaper reaper = null; |
| CuratorFramework client = CuratorFrameworkFactory.builder() |
| .connectString(server.getConnectString()) |
| .sessionTimeoutMs(timing.session()) |
| .connectionTimeoutMs(timing.connection()) |
| .retryPolicy(new RetryOneTime(1)) |
| .namespace("foo") |
| .build(); |
| try |
| { |
| client.start(); |
| |
| for ( int i = 0; i < 10; ++i ) |
| { |
| client.create().creatingParentsIfNeeded().forPath("/test/" + Integer.toString(i)); |
| } |
| |
| reaper = new ChildReaper(client, "/test", Reaper.Mode.REAP_UNTIL_DELETE, 1); |
| reaper.start(); |
| |
| timing.forWaiting().sleepABit(); |
| |
| Stat stat = client.checkExists().forPath("/test"); |
| Assert.assertEquals(stat.getNumChildren(), 0); |
| |
| stat = client.usingNamespace(null).checkExists().forPath("/foo/test"); |
| Assert.assertNotNull(stat); |
| Assert.assertEquals(stat.getNumChildren(), 0); |
| } |
| finally |
| { |
| CloseableUtils.closeQuietly(reaper); |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| } |