Examples with ExponentialBackoffRetry org.apache.flink.shaded.curator5.org.apache.curator.retry.ExponentialBackoffRetry used on opensource projects

Example 51 with ExponentialBackoffRetry

use of org.apache.flink.shaded.curator5.org.apache.curator.retry.ExponentialBackoffRetry in project airavata by apache.

the class Factory method getCuratorClient.

public static CuratorFramework getCuratorClient() throws ApplicationSettingsException {
    if (curatorClient == null) {
        synchronized (Factory.class) {
            if (curatorClient == null) {
                String connectionSting = ServerSettings.getZookeeperConnection();
                RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 5);
                curatorClient = CuratorFrameworkFactory.newClient(connectionSting, retryPolicy);
            }
        }
    }
    return curatorClient;
}

Example 52 with ExponentialBackoffRetry

use of org.apache.flink.shaded.curator5.org.apache.curator.retry.ExponentialBackoffRetry in project airavata by apache.

the class DbEventManagerZkUtils method getCuratorClient.

/**
 *  Get curatorFramework instance
 * @return
 * @throws ApplicationSettingsException
 */
public static CuratorFramework getCuratorClient() throws ApplicationSettingsException {
    if (curatorClient == null) {
        synchronized (DbEventManagerZkUtils.class) {
            if (curatorClient == null) {
                String connectionSting = ServerSettings.getZookeeperConnection();
                RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 5);
                curatorClient = CuratorFrameworkFactory.newClient(connectionSting, retryPolicy);
            }
        }
    }
    return curatorClient;
}

Example 53 with ExponentialBackoffRetry

use of org.apache.flink.shaded.curator5.org.apache.curator.retry.ExponentialBackoffRetry in project airavata by apache.

the class OrchestratorServerHandler method startCurator.

private void startCurator() throws ApplicationSettingsException {
    String connectionSting = ServerSettings.getZookeeperConnection();
    RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 5);
    curatorClient = CuratorFrameworkFactory.newClient(connectionSting, retryPolicy);
    curatorClient.start();
}

Example 54 with ExponentialBackoffRetry

use of org.apache.flink.shaded.curator5.org.apache.curator.retry.ExponentialBackoffRetry in project Mycat_plus by coderczp.

the class ZKUtils method createConnection.

private static CuratorFramework createConnection() {
    String url = ZkConfig.getInstance().getZkURL();
    CuratorFramework curatorFramework = CuratorFrameworkFactory.newClient(url, new ExponentialBackoffRetry(100, 6));
    // start connection
    curatorFramework.start();
    // wait 3 second to establish connect
    try {
        curatorFramework.blockUntilConnected(3, TimeUnit.SECONDS);
        if (curatorFramework.getZookeeperClient().isConnected()) {
            return curatorFramework;
        }
    } catch (InterruptedException ignored) {
        Thread.currentThread().interrupt();
    }
    // fail situation
    curatorFramework.close();
    throw new RuntimeException("failed to connect to zookeeper service : " + url);
}

Example 55 with ExponentialBackoffRetry

use of org.apache.flink.shaded.curator5.org.apache.curator.retry.ExponentialBackoffRetry in project Mycat_plus by coderczp.

the class DistributedSequenceHandler method initializeZK.

public void initializeZK(String zkAddress) {
    this.client = CuratorFrameworkFactory.newClient(zkAddress, new ExponentialBackoffRetry(1000, 3));
    this.client.start();
    try {
        if (client.checkExists().forPath(PATH.concat(INSTANCE_PATH)) == null) {
            client.create().creatingParentContainersIfNeeded().forPath(PATH.concat(INSTANCE_PATH));
        }
    } catch (Exception e) {
    // do nothing
    }
    this.leaderSelector = new LeaderSelector(client, PATH.concat(LEADER_PATH), this);
    this.leaderSelector.autoRequeue();
    this.leaderSelector.start();
    Runnable runnable = new Runnable() {

        @Override
        public void run() {
            try {
                while (leaderSelector.getLeader() == null) {
                    Thread.currentThread().yield();
                }
                if (!leaderSelector.hasLeadership()) {
                    isLeader = false;
                    if (slavePath != null && client.checkExists().forPath(slavePath) != null) {
                        return;
                    }
                    slavePath = client.create().creatingParentsIfNeeded().withMode(CreateMode.EPHEMERAL_SEQUENTIAL).forPath(PATH.concat("/instance/node"), "ready".getBytes());
                    while ("ready".equals(new String(client.getData().forPath(slavePath)))) {
                        Thread.currentThread().yield();
                    }
                    instanceId = Long.parseLong(new String(client.getData().forPath(slavePath)));
                    ready = true;
                }
            } catch (Exception e) {
                LOGGER.warn("Caught exception while handling zk!", e);
            }
        }
    };
    timerExecutor.scheduleAtFixedRate(runnable, 1L, 10L, TimeUnit.SECONDS);
}