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

            server.restart();
            Assert.assertTrue(timing.awaitLatch(latch));


            timing.sleepABit();


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

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            server.restart();
            Assert.assertTrue(timing.awaitLatch(latch));


            timing.sleepABit();


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

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            client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            client.start();


            readBytes = client.getData().forPath("/test");
            Assert.assertEquals(writtenBytes, readBytes);
            Stat    stat = client.checkExists().forPath("/ghost");
            Assert.assertNull(stat);


            String  realPath = client.create().withMode(CreateMode.PERSISTENT_SEQUENTIAL).forPath("/pseq", writtenBytes);
            Assert.assertNotSame(realPath, "/pseq");

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            client.close();
            client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            client.start();


            stat = client.checkExists().forPath(realPath);
            Assert.assertNull(stat);
        }
        finally
        {
            client.close();

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                }
            };


            client.getCuratorListenable().addListener(listener);
            client.create().forPath("/base");
            client.checkExists().inBackground().forPath("/base");


            String      path = queue.poll(10, TimeUnit.SECONDS);
            Assert.assertEquals(path, "/base");


            client.getCuratorListenable().removeListener(listener);

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            server.stop();
            Assert.assertTrue(timing.awaitLatch(lostLatch));
            try
            {
                client.checkExists().forPath("/");
                Assert.fail("Connection should be down");
            }
            catch ( KeeperException.ConnectionLossException e )
            {
                // expected

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                    }
                }
            );


            client.create().forPath("/head");
            Assert.assertNotNull(client.checkExists().forPath("/head"));


            CountDownLatch      latch = new CountDownLatch(1);
            client.sync("/head", latch);
            Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
        }

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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"));


            final CountDownLatch      latch = new CountDownLatch(1);
            BackgroundCallback callback = new BackgroundCallback()
            {
                @Override

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                    }
                }
            );


            client.create().forPath("/head");
            Assert.assertNotNull(client.checkExists().forPath("/head"));


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

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            Assert.assertNotNull(client.checkExists().forPath("/head"));


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

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