com.netflix.curator.TestSessionFailRetryLoop.java Source code

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Here is the source code for com.netflix.curator.TestSessionFailRetryLoop.java

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/*
 * Copyright 2013 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;

import com.google.common.io.Closeables;
import com.netflix.curator.retry.RetryOneTime;
import com.netflix.curator.test.KillSession;
import com.netflix.curator.test.Timing;
import junit.framework.Assert;

import org.apache.commons.io.IOUtils;
import org.apache.zookeeper.KeeperException;
import org.testng.annotations.Test;
import java.util.concurrent.Callable;
import java.util.concurrent.atomic.AtomicBoolean;

public class TestSessionFailRetryLoop extends BaseClassForTests {
    @Test
    public void testRetry() throws Exception {
        Timing timing = new Timing();
        final CuratorZookeeperClient client = new CuratorZookeeperClient(server.getConnectString(),
                timing.session(), timing.connection(), null, new RetryOneTime(1));
        SessionFailRetryLoop retryLoop = client.newSessionFailRetryLoop(SessionFailRetryLoop.Mode.RETRY);
        retryLoop.start();
        try {
            client.start();
            final AtomicBoolean secondWasDone = new AtomicBoolean(false);
            final AtomicBoolean firstTime = new AtomicBoolean(true);
            while (retryLoop.shouldContinue()) {
                try {
                    RetryLoop.callWithRetry(client, new Callable<Void>() {
                        @Override
                        public Void call() throws Exception {
                            if (firstTime.compareAndSet(true, false)) {
                                Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                                KillSession.kill(client.getZooKeeper(), server.getConnectString());
                                client.getZooKeeper();
                                client.blockUntilConnectedOrTimedOut();
                            }

                            Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                            return null;
                        }
                    });

                    RetryLoop.callWithRetry(client, new Callable<Void>() {
                        @Override
                        public Void call() throws Exception {
                            Assert.assertFalse(firstTime.get());
                            Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                            secondWasDone.set(true);
                            return null;
                        }
                    });
                } catch (Exception e) {
                    retryLoop.takeException(e);
                }
            }

            Assert.assertTrue(secondWasDone.get());
        } finally {
            retryLoop.close();
            IOUtils.closeQuietly(client);
        }
    }

    @Test
    public void testRetryStatic() throws Exception {
        Timing timing = new Timing();
        final CuratorZookeeperClient client = new CuratorZookeeperClient(server.getConnectString(),
                timing.session(), timing.connection(), null, new RetryOneTime(1));
        SessionFailRetryLoop retryLoop = client.newSessionFailRetryLoop(SessionFailRetryLoop.Mode.RETRY);
        retryLoop.start();
        try {
            client.start();
            final AtomicBoolean secondWasDone = new AtomicBoolean(false);
            final AtomicBoolean firstTime = new AtomicBoolean(true);
            SessionFailRetryLoop.callWithRetry(client, SessionFailRetryLoop.Mode.RETRY, new Callable<Object>() {
                @Override
                public Object call() throws Exception {
                    RetryLoop.callWithRetry(client, new Callable<Void>() {
                        @Override
                        public Void call() throws Exception {
                            if (firstTime.compareAndSet(true, false)) {
                                Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                                KillSession.kill(client.getZooKeeper(), server.getConnectString());
                                client.getZooKeeper();
                                client.blockUntilConnectedOrTimedOut();
                            }

                            Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                            return null;
                        }
                    });

                    RetryLoop.callWithRetry(client, new Callable<Void>() {
                        @Override
                        public Void call() throws Exception {
                            Assert.assertFalse(firstTime.get());
                            Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                            secondWasDone.set(true);
                            return null;
                        }
                    });
                    return null;
                }
            });

            Assert.assertTrue(secondWasDone.get());
        } finally {
            retryLoop.close();
            IOUtils.closeQuietly(client);
        }
    }

    @Test
    public void testBasic() throws Exception {
        Timing timing = new Timing();
        final CuratorZookeeperClient client = new CuratorZookeeperClient(server.getConnectString(),
                timing.session(), timing.connection(), null, new RetryOneTime(1));
        SessionFailRetryLoop retryLoop = client.newSessionFailRetryLoop(SessionFailRetryLoop.Mode.FAIL);
        retryLoop.start();
        try {
            client.start();
            try {
                while (retryLoop.shouldContinue()) {
                    try {
                        RetryLoop.callWithRetry(client, new Callable<Void>() {
                            @Override
                            public Void call() throws Exception {
                                Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                                KillSession.kill(client.getZooKeeper(), server.getConnectString());

                                client.getZooKeeper();
                                client.blockUntilConnectedOrTimedOut();
                                Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                                return null;
                            }
                        });
                    } catch (Exception e) {
                        retryLoop.takeException(e);
                    }
                }

                Assert.fail();
            } catch (SessionFailRetryLoop.SessionFailedException dummy) {
                // correct
            }
        } finally {
            retryLoop.close();
            IOUtils.closeQuietly(client);
        }
    }

    @Test
    public void testBasicStatic() throws Exception {
        Timing timing = new Timing();
        final CuratorZookeeperClient client = new CuratorZookeeperClient(server.getConnectString(),
                timing.session(), timing.connection(), null, new RetryOneTime(1));
        SessionFailRetryLoop retryLoop = client.newSessionFailRetryLoop(SessionFailRetryLoop.Mode.FAIL);
        retryLoop.start();
        try {
            client.start();
            try {
                SessionFailRetryLoop.callWithRetry(client, SessionFailRetryLoop.Mode.FAIL, new Callable<Object>() {
                    @Override
                    public Object call() throws Exception {
                        RetryLoop.callWithRetry(client, new Callable<Void>() {
                            @Override
                            public Void call() throws Exception {
                                Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                                KillSession.kill(client.getZooKeeper(), server.getConnectString());

                                client.getZooKeeper();
                                client.blockUntilConnectedOrTimedOut();
                                Assert.assertNull(client.getZooKeeper().exists("/foo/bar", false));
                                return null;
                            }
                        });
                        return null;
                    }
                });
            } catch (SessionFailRetryLoop.SessionFailedException dummy) {
                // correct
            }
        } finally {
            retryLoop.close();
            IOUtils.closeQuietly(client);
        }
    }
}