public Integer getServerPort() {
    return serverPort;
  }
Gets the port on which the Server is listening for cache client connections. This property
should not be confused with the 'port' ServerLauncher property, which is used by the Server to
set the 'tcp-port' distribution config property and is used by the ServerSocket for peer
distribution and messaging.

@return an Integer value indicating the port the Server is listening on for cache client
        connections in the client/server topology.
geode-core/src/main/java/org/apache/geode/distributed/ServerLauncher.java