Java Code Examples for org.apache.hadoop.hbase.HConstants#ZOOKEEPER_CLIENT_PORT

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Example 1
Source File: ZKConfig.java    From hbase with Apache License 2.0 4 votes vote down vote up 
/**
 * Separate the given key into the three configurations it should contain:
 * hbase.zookeeper.quorum, hbase.zookeeper.client.port
 * and zookeeper.znode.parent
 * @param key
 * @return the three configuration in the described order
 * @throws IOException
 */
public static ZKClusterKey transformClusterKey(String key) throws IOException {
  String[] parts = key.split(":");

  if (parts.length == 3) {
    if (!parts[2].matches("/.*[^/]")) {
      throw new IOException("Cluster key passed " + key + " is invalid, the format should be:" +
          HConstants.ZOOKEEPER_QUORUM + ":" + HConstants.ZOOKEEPER_CLIENT_PORT + ":"
          + HConstants.ZOOKEEPER_ZNODE_PARENT);
    }
    return new ZKClusterKey(parts [0], Integer.parseInt(parts [1]), parts [2]);
  }

  if (parts.length > 3) {
    // The quorum could contain client port in server:clientport format, try to transform more.
    String zNodeParent = parts [parts.length - 1];
    if (!zNodeParent.matches("/.*[^/]")) {
      throw new IOException("Cluster key passed " + key + " is invalid, the format should be:"
          + HConstants.ZOOKEEPER_QUORUM + ":" + HConstants.ZOOKEEPER_CLIENT_PORT + ":"
          + HConstants.ZOOKEEPER_ZNODE_PARENT);
    }

    String clientPort = parts [parts.length - 2];

    // The first part length is the total length minus the lengths of other parts and minus 2 ":"
    int endQuorumIndex = key.length() - zNodeParent.length() - clientPort.length() - 2;
    String quorumStringInput = key.substring(0, endQuorumIndex);
    String[] serverHosts = quorumStringInput.split(",");

    // The common case is that every server has its own client port specified - this means
    // that (total parts - the ZNodeParent part - the ClientPort part) is equal to
    // (the number of "," + 1) - "+ 1" because the last server has no ",".
    if ((parts.length - 2) == (serverHosts.length + 1)) {
      return new ZKClusterKey(quorumStringInput, Integer.parseInt(clientPort), zNodeParent);
    }

    // For the uncommon case that some servers has no port specified, we need to build the
    // server:clientport list using default client port for servers without specified port.
    return new ZKClusterKey(
        buildZKQuorumServerString(serverHosts, clientPort),
        Integer.parseInt(clientPort),
        zNodeParent);
  }

  throw new IOException("Cluster key passed " + key + " is invalid, the format should be:" +
      HConstants.ZOOKEEPER_QUORUM + ":" + HConstants.ZOOKEEPER_CLIENT_PORT + ":"
      + HConstants.ZOOKEEPER_ZNODE_PARENT);
}