/**
   * Initializes this object.
   *
   * @param key Property-key to use for locating initialization properties.
   * @param type Property-type to use for locating initialization properties.
   * @exception ProcessingException when initialization fails
   */
  public void initialize(String key, String type) throws ProcessingException {
    super.initialize(key, type);

    StringBuffer errorBuf = new StringBuffer();

    // serverName = getRequiredProperty(SERVER_NAME_PROP, errorBuf);

    headerLocation = getPropertyValue(NF_HEADER_LOCATION_PROP);

    isAsyncLocation = getPropertyValue(IS_ASYNCHRONOUS_LOCATION_PROP);

    orbAgentAddr = getPropertyValue(ORB_AGENT_ADDR_PROP);

    orbAgentPort = getPropertyValue(ORB_AGENT_PORT_PROP);

    orbAgentAddrLocation = getPropertyValue(ORB_AGENT_ADDR_PROP_LOCATION);

    orbAgentPortLocation = getPropertyValue(ORB_AGENT_PORT_PROP_LOCATION);

    if (!StringUtils.hasValue(isAsyncLocation)) {
      try {
        isAsync =
            StringUtils.getBoolean(
                (String) getRequiredPropertyValue(DEFAULT_IS_ASYNCHRONOUS_PROP, errorBuf));
      } catch (FrameworkException fe) {
        errorBuf.append(
            "No value is specified for either "
                + IS_ASYNCHRONOUS_LOCATION_PROP
                + "or"
                + DEFAULT_IS_ASYNCHRONOUS_PROP
                + ". One of the values should be present"
                + fe.getMessage());
      }
    }

    if (!StringUtils.hasValue(headerLocation)) {
      try {
        header = getRequiredPropertyValue(DEFAULT_HEADER_PROP, errorBuf);
      } catch (Exception e) {
        errorBuf.append(
            "No value is specified for "
                + NF_HEADER_LOCATION_PROP
                + "or"
                + DEFAULT_HEADER_PROP
                + ". One of the values should be present"
                + e.getMessage());
      }
    }

    if (errorBuf.length() > 0) throw new ProcessingException(errorBuf.toString());
  }
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  /**
   * Get a human-readable description of the event queue.
   *
   * @return A description of the event queue.
   */
  public String describe() {
    StringBuffer sb = new StringBuffer();

    sb.append("Database event queue [");
    sb.append(StringUtils.getClassName(this));
    sb.append("], in-memory-event-count [");
    sb.append(queue.size());
    sb.append("], Event-load-batch-size [");
    sb.append(maxDatabaseEventLoadSize);
    sb.append("]");

    return (sb.toString());
  }