Class SocketServer


  • public class SocketServer
    extends java.lang.Object
    A SocketNode based server that uses a different hierarchy for each client.
         Usage: java org.apache.log4j.net.SocketServer port configFile configDir
    
         where port is a part number where the server listens,
               configFile is a configuration file fed to the PropertyConfigurator and
               configDir is a path to a directory containing configuration files, possibly one for each client host.
         

    The configFile is used to configure the log4j default hierarchy that the SocketServer will use to report on its actions.

    When a new connection is opened from a previously unknown host, say foo.bar.net, then the SocketServer will search for a configuration file called foo.bar.net.lcf under the directory configDir that was passed as the third argument. If the file can be found, then a new hierarchy is instantiated and configured using the configuration file foo.bar.net.lcf. If and when the host foo.bar.net opens another connection to the server, then the previously configured hierarchy is used.

    In case there is no file called foo.bar.net.lcf under the directory configDir, then the generic hierarchy is used. The generic hierarchy is configured using a configuration file called generic.lcf under the configDir directory. If no such file exists, then the generic hierarchy will be identical to the log4j default hierarchy.

    Having different client hosts log using different hierarchies ensures the total independence of the clients with respect to their logging settings.

    Currently, the hierarchy that will be used for a given request depends on the IP address of the client host. For example, two separate applicatons running on the same host and logging to the same server will share the same hierarchy. This is perfectly safe except that it might not provide the right amount of independence between applications. The SocketServer is intended as an example to be enhanced in order to implement more elaborate policies.

    Since:
    1.0
    • Field Detail

      • GENERIC

        static java.lang.String GENERIC
      • CONFIG_FILE_EXT

        static java.lang.String CONFIG_FILE_EXT
      • port

        static int port
      • hierarchyMap

        java.util.Hashtable hierarchyMap
      • dir

        java.io.File dir
    • Constructor Detail

      • SocketServer

        public SocketServer​(java.io.File directory)
    • Method Detail

      • main

        public static void main​(java.lang.String[] argv)
      • usage

        static void usage​(java.lang.String msg)
      • init

        static void init​(java.lang.String portStr,
                         java.lang.String configFile,
                         java.lang.String dirStr)
      • configureHierarchy

        LoggerRepository configureHierarchy​(java.net.InetAddress inetAddress)