Examples of org.apache.curator.framework.CuratorFramework.checkExists()

Class org.apache.curator.framework.CuratorFramework

Examples of org.apache.curator.framework.CuratorFramework.checkExists()

org.apache.curator.framework.CuratorFramework.checkExists()
Start an exists builder
The builder will return a Stat object as if org.apache.zookeeper.ZooKeeper.exists() were called. Thus, a null means that it does not exist and an actual Stat object means it does exist. @return builder object

                                }
                            }
                    );


            client.create().creatingParentsIfNeeded().forPath("/one/two/three/four");
            Assert.assertNotNull(client.checkExists().forPath("/one/two/three/four"));


            CountDownLatch      latch = new CountDownLatch(1);
            client.delete().deletingChildrenIfNeeded().inBackground(latch).forPath("/one/two");
            Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
            Assert.assertNull(client.checkExists().forPath("/one/two"));

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            Assert.assertNotNull(client.checkExists().forPath("/one/two/three/four"));


            CountDownLatch      latch = new CountDownLatch(1);
            client.delete().deletingChildrenIfNeeded().inBackground(latch).forPath("/one/two");
            Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
            Assert.assertNull(client.checkExists().forPath("/one/two"));
        }
        finally
        {
            client.close();
        }

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        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
        client.start();
        try
        {
            client.create().forPath("/head");
            Assert.assertNotNull(client.checkExists().forPath("/head"));
            client.delete().forPath("/head");
            Assert.assertNull(client.checkExists().forPath("/head"));
        }
        finally
        {

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        try
        {
            client.create().forPath("/head");
            Assert.assertNotNull(client.checkExists().forPath("/head"));
            client.delete().forPath("/head");
            Assert.assertNull(client.checkExists().forPath("/head"));
        }
        finally
        {
            client.close();
        }

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        client.start();
        try
        {
            client.create().creatingParentsIfNeeded().forPath("/one/two/three/four/five/six", "foo".getBytes());
            client.delete().deletingChildrenIfNeeded().forPath("/one/two/three/four/five");
            Assert.assertNull(client.checkExists().forPath("/one/two/three/four/five"));
            client.delete().deletingChildrenIfNeeded().forPath("/one/two");
            Assert.assertNull(client.checkExists().forPath("/one/two"));
        }
        finally
        {

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        {
            client.create().creatingParentsIfNeeded().forPath("/one/two/three/four/five/six", "foo".getBytes());
            client.delete().deletingChildrenIfNeeded().forPath("/one/two/three/four/five");
            Assert.assertNull(client.checkExists().forPath("/one/two/three/four/five"));
            client.delete().deletingChildrenIfNeeded().forPath("/one/two");
            Assert.assertNull(client.checkExists().forPath("/one/two"));
        }
        finally
        {
            client.close();
        }

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        client.start();
        try
        {
            client.create().creatingParentsIfNeeded().forPath("/one/two/three/four/five/six", "foo".getBytes());
            client.delete().guaranteed().deletingChildrenIfNeeded().forPath("/one/two/three/four/five");
            Assert.assertNull(client.checkExists().forPath("/one/two/three/four/five"));
            client.delete().guaranteed().deletingChildrenIfNeeded().forPath("/one/two");
            Assert.assertNull(client.checkExists().forPath("/one/two"));
        }
        finally
        {

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        {
            client.create().creatingParentsIfNeeded().forPath("/one/two/three/four/five/six", "foo".getBytes());
            client.delete().guaranteed().deletingChildrenIfNeeded().forPath("/one/two/three/four/five");
            Assert.assertNull(client.checkExists().forPath("/one/two/three/four/five"));
            client.delete().guaranteed().deletingChildrenIfNeeded().forPath("/one/two");
            Assert.assertNull(client.checkExists().forPath("/one/two"));
        }
        finally
        {
            client.close();
        }

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            lock.acquire(10, TimeUnit.SECONDS);
            Assert.assertTrue(lock.isAcquiredInThisProcess());


            // Kill the session, check that lock node still exists
            KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
            Assert.assertNotNull(client.checkExists().forPath(LOCK_PATH));


            // Release the lock and verify that the actual lock node created no longer exists
            String actualLockPath = lock.getLockPath();
            lock.release();
            Assert.assertNull(client.checkExists().forPath(actualLockPath));

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            Assert.assertNotNull(client.checkExists().forPath(LOCK_PATH));


            // Release the lock and verify that the actual lock node created no longer exists
            String actualLockPath = lock.getLockPath();
            lock.release();
            Assert.assertNull(client.checkExists().forPath(actualLockPath));
        }
        finally
        {
            client.close();
        }

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