com.netflix.curator.framework.imps.TestFailedDeleteManager.java Source code

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Here is the source code for com.netflix.curator.framework.imps.TestFailedDeleteManager.java

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/*
 *
 *  Copyright 2011 Netflix, Inc.
 *
 *     Licensed 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 com.netflix.curator.framework.imps;

import java.io.File;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Semaphore;

import org.apache.commons.io.IOUtils;
import org.apache.zookeeper.KeeperException;
import org.testng.Assert;
import org.testng.annotations.Test;

import com.netflix.curator.framework.CuratorFramework;
import com.netflix.curator.framework.CuratorFrameworkFactory;
import com.netflix.curator.framework.state.ConnectionState;
import com.netflix.curator.framework.state.ConnectionStateListener;
import com.netflix.curator.retry.ExponentialBackoffRetry;
import com.netflix.curator.retry.RetryOneTime;
import com.netflix.curator.test.TestingServer;
import com.netflix.curator.test.Timing;

public class TestFailedDeleteManager extends BaseClassForTests {
    @Test
    public void testLostSession() throws Exception {
        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(),
                timing.connection(), new ExponentialBackoffRetry(100, 3));
        try {
            client.start();

            client.create().forPath("/test-me");

            final CountDownLatch latch = new CountDownLatch(1);
            final Semaphore semaphore = new Semaphore(0);
            ConnectionStateListener listener = new ConnectionStateListener() {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState) {
                    if ((newState == ConnectionState.LOST) || (newState == ConnectionState.SUSPENDED)) {
                        semaphore.release();
                    } else if (newState == ConnectionState.RECONNECTED) {
                        latch.countDown();
                    }
                }
            };
            client.getConnectionStateListenable().addListener(listener);
            server.stop();

            Assert.assertTrue(timing.acquireSemaphore(semaphore));
            try {
                client.delete().guaranteed().forPath("/test-me");
                Assert.fail();
            } catch (KeeperException.ConnectionLossException e) {
                // expected
            }
            Assert.assertTrue(timing.acquireSemaphore(semaphore));

            timing.sleepABit();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            Assert.assertTrue(timing.awaitLatch(latch));

            timing.sleepABit();

            Assert.assertNull(client.checkExists().forPath("/test-me"));
        } finally {
            IOUtils.closeQuietly(client);
        }
    }

    @Test
    public void testWithNamespaceAndLostSession() throws Exception {
        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.builder().connectString(server.getConnectString())
                .sessionTimeoutMs(timing.session()).connectionTimeoutMs(timing.connection())
                .retryPolicy(new ExponentialBackoffRetry(100, 3)).namespace("aisa").build();
        try {
            client.start();

            client.create().forPath("/test-me");

            final CountDownLatch latch = new CountDownLatch(1);
            final Semaphore semaphore = new Semaphore(0);
            ConnectionStateListener listener = new ConnectionStateListener() {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState) {
                    if ((newState == ConnectionState.LOST) || (newState == ConnectionState.SUSPENDED)) {
                        semaphore.release();
                    } else if (newState == ConnectionState.RECONNECTED) {
                        latch.countDown();
                    }
                }
            };
            client.getConnectionStateListenable().addListener(listener);
            server.stop();

            Assert.assertTrue(timing.acquireSemaphore(semaphore));
            try {
                client.delete().guaranteed().forPath("/test-me");
                Assert.fail();
            } catch (KeeperException.ConnectionLossException e) {
                // expected
            }
            Assert.assertTrue(timing.acquireSemaphore(semaphore));

            timing.sleepABit();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            Assert.assertTrue(timing.awaitLatch(latch));

            timing.sleepABit();

            Assert.assertNull(client.checkExists().forPath("/test-me"));
        } finally {
            IOUtils.closeQuietly(client);
        }
    }

    @Test
    public void testWithNamespaceAndLostSessionAlt() throws Exception {
        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.builder().connectString(server.getConnectString())
                .sessionTimeoutMs(timing.session()).connectionTimeoutMs(timing.connection())
                .retryPolicy(new ExponentialBackoffRetry(100, 3)).build();
        try {
            client.start();

            CuratorFramework namespaceClient = client.usingNamespace("foo");
            namespaceClient.create().forPath("/test-me");

            final CountDownLatch latch = new CountDownLatch(1);
            final Semaphore semaphore = new Semaphore(0);
            ConnectionStateListener listener = new ConnectionStateListener() {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState) {
                    if ((newState == ConnectionState.LOST) || (newState == ConnectionState.SUSPENDED)) {
                        semaphore.release();
                    } else if (newState == ConnectionState.RECONNECTED) {
                        latch.countDown();
                    }
                }
            };
            namespaceClient.getConnectionStateListenable().addListener(listener);
            server.stop();

            Assert.assertTrue(timing.acquireSemaphore(semaphore));
            try {
                namespaceClient.delete().guaranteed().forPath("/test-me");
                Assert.fail();
            } catch (KeeperException.ConnectionLossException e) {
                // expected
            }
            Assert.assertTrue(timing.acquireSemaphore(semaphore));

            timing.sleepABit();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            Assert.assertTrue(timing.awaitLatch(latch));

            timing.sleepABit();

            Assert.assertNull(namespaceClient.checkExists().forPath("/test-me"));
        } finally {
            IOUtils.closeQuietly(client);
        }
    }

    @Test
    public void testBasic() throws Exception {
        final String PATH = "/one/two/three";

        Timing timing = new Timing();
        CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder();
        builder.connectString(server.getConnectString()).retryPolicy(new RetryOneTime(1))
                .connectionTimeoutMs(timing.connection()).sessionTimeoutMs(timing.session());
        CuratorFrameworkImpl client = new CuratorFrameworkImpl(builder);
        client.start();
        try {
            client.create().creatingParentsIfNeeded().forPath(PATH);
            Assert.assertNotNull(client.checkExists().forPath(PATH));

            File serverDir = server.getTempDirectory();
            int serverPort = server.getPort();

            server.stop(); // cause the next delete to fail
            server = null;
            try {
                client.delete().forPath(PATH);
                Assert.fail();
            } catch (KeeperException.ConnectionLossException e) {
                // expected
            }

            server = new TestingServer(serverPort, serverDir);
            Assert.assertNotNull(client.checkExists().forPath(PATH));

            server.stop(); // cause the next delete to fail
            server = null;
            try {
                client.delete().guaranteed().forPath(PATH);
                Assert.fail();
            } catch (KeeperException.ConnectionLossException e) {
                // expected
            }

            server = new TestingServer(serverPort, serverDir);

            final int TRIES = 5;
            for (int i = 0; i < TRIES; ++i) {
                if (client.checkExists().forPath(PATH) != null) {
                    timing.sleepABit();
                }
            }
            Assert.assertNull(client.checkExists().forPath(PATH));
        } finally {
            IOUtils.closeQuietly(client);
        }
    }
}