Exemplo n.º 1
0
  @Override
  public boolean isAlive(InetAddress ep) {
    if (ep.equals(Utils.getBroadcastAddress())) return true;

    EndpointState epState = Gossiper.instance.getEndpointStateForEndpoint(ep);
    // we could assert not-null, but having isAlive fail screws a node over so badly that
    // it's worth being defensive here so minor bugs don't cause disproportionate
    // badness.  (See lealone-1463 for an example).
    if (epState == null) logger.error("unknown endpoint {}", ep);
    return epState != null && epState.isAlive();
  }
  /**
   * Return the rack for which an endpoint resides in
   *
   * @param endpoint the endpoint to process
   * @return string of rack
   */
  @Override
  public String getRack(InetAddress endpoint) {
    if (endpoint.equals(Utils.getBroadcastAddress())) return myRack;

    EndpointState epState = Gossiper.instance.getEndpointStateForEndpoint(endpoint);
    if (epState == null || epState.getApplicationState(ApplicationState.RACK) == null) {
      if (psnitch == null) {
        if (savedEndpoints == null) savedEndpoints = ClusterMetaData.loadDcRackInfo();
        if (savedEndpoints.containsKey(endpoint)) return savedEndpoints.get(endpoint).get("rack");
        return DEFAULT_RACK;
      } else return psnitch.getRack(endpoint);
    }
    return epState.getApplicationState(ApplicationState.RACK).value;
  }