listeners.addListener(listener, executor);
  }

  @Override
  public String toString() {
    return getClass().getSimpleName() + " [" + state() + "]";
  }

  /**
   * Attempts to execute all the listeners in {@link #listeners} while not holding the {@link
   * #monitor}.
   */
  private void dispatchListenerEvents() {
    if (!monitor.isOccupiedByCurrentThread()) {
      listeners.dispatch();

    /**
     * Sets the maximum retry attempts for configuration synchronization status checks.
     *
     * @param maxConfigSyncStatusRetry the maximum retry attempts
     */
    public void setMaxConfigSyncStatusRetry(final int maxConfigSyncStatusRetry) {
        this.maxConfigSyncStatusRetry = maxConfigSyncStatusRetry;
    }

    /**
     * Sets the maximum retry attempts for search engine status checks.
     *

  }

  fun idleConnectionCount(): Int =
    connections.count {
      it.withLock { it.calls.isEmpty() }
    }

  fun connectionCount(): Int = connections.size

  /**
   * Attempts to acquire a recycled connection to [address] for [connectionUser]. Returns the connection if it
   * was acquired, or null if no connection was acquired. The acquired connection will also be

func (b *block) toUSTAR() *headerUSTAR { return (*headerUSTAR)(b) }
func (b *block) toSparse() sparseArray { return sparseArray(b[:]) }

// getFormat checks that the block is a valid tar header based on the checksum.
// It then attempts to guess the specific format based on magic values.
// If the checksum fails, then FormatUnknown is returned.
func (b *block) getFormat() Format {
	// Verify checksum.
	var p parser

	ReplicationStatus     replication.StatusType
	PrevReplicationStatus replication.StatusType
	VersionPurgeStatus    VersionPurgeStatusType
	ResyncTimestamp       string
	ReplicationResynced   bool // true only if resync attempted for this target
	endpoint              string
	secure                bool
	Err                   error // replication error if any
}

// Empty returns true for a target if arn is empty

     */
    public fun settings(settings: Settings): Builder =
      apply {
        this.settings_.clear()
        this.settings_.merge(settings)
      }

    /**
     * Attempts to perform a web socket upgrade on the connection.
     * This will overwrite any previously set status, body, or streamHandler.
     */
    public fun webSocketUpgrade(listener: WebSocketListener): Builder =
      apply {

            return authenticator;
        } catch (final Exception e) {
            throw new SsoLoginException("Failed to initialize SPNEGO.", e);
        }
    }

    /**
     * Attempts to obtain login credentials using SPNEGO authentication.
     *
     * This method processes the HTTP request to extract and validate SPNEGO
     * authentication tokens. It handles the SPNEGO handshake process and

                }
                ex = e;
            }
        }

        if (ex != null) {
            throw ex;
        }
        throw new TransportException("All connection attempts failed");
    }

    /**
     * Checks if the specified transport is contained in the connection pool
     * @param trans the transport to check for
     * @return whether (non-exclusive) connection is in the pool

        connectionPool.scheduleCloser()
      }
    }
  }

  override fun handshake(): Handshake? = handshake

  /** Track a bad route in the route database. Other routes will be attempted first. */
  internal fun connectFailed(
    client: OkHttpClient,
    failedRoute: Route,
    failure: IOException,
  ) {
    // Tell the proxy selector when we fail to connect on a fresh connection.

   * {@link Builder} and call {@link Builder#orderRowsBy}, {@link Builder#orderColumnsBy}, and
   * {@link Builder#putAll}
   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is
   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   */