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ZooKeeper | Curator Framework: List children of a zNode [getChildren]
  1. Notes
  2. Example

  1. Notes:
    The code bellow let you print all direct zNodes (children) under a specific path.

    Calling the method "CuratorFramework::getChildren" will return a list of zNode names (List<String>).

    If the path doesn't exist it will throw an exception:
    org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /path

    In order for the code bellow to work:
    ► Make sure to update the "CONNECT_STRING" variable with your information.
  2. Example
    Here's an example of how to list all zNodes under a specific path:
    final String CONNECT_STRING = "localhost:2181";
    
    final int SESSION_TIMEOUT_MS = Integer.valueOf(60 * 1000);
    final int CONNECTION_TIMEOUT_MS = Integer.valueOf(15 * 1000);
    final RetryPolicy RETRY_POLICY = new RetryOneTime(1000);
    
    // -- CuratorFrameworkFactory::newClient
    final CuratorFramework curatorFramework = CuratorFrameworkFactory.newClient(CONNECT_STRING, SESSION_TIMEOUT_MS, CONNECTION_TIMEOUT_MS, RETRY_POLICY);
    
    // -- CuratorFramework::start
    curatorFramework.start();
    
    // -- CuratorFramework::getChildren
    final String path = "/abc/abc1";
    List<String> children = curatorFramework.getChildren().forPath(path);
    
    for (String child : children) {
        System.out.println(child);
    }
    
    // -- CuratorFramework::close
    curatorFramework.close();
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