Class ClassConfigurator

java.lang.Object
org.jgroups.conf.ClassConfigurator

public class ClassConfigurator extends Object
This class will be replaced with the class that read info from the magic number configurator that reads info from the xml file. The name and the relative path of the magic number map file can be specified as value of the property org.jgroups.conf.magicNumberFile. It must be relative to one of the classpath elements, to allow the classloader to locate the file. If a value is not specified, MagicNumberReader.MAGIC_NUMBER_FILE is used, which defaults to "jg-magic-map.xml".
Author:
Filip Hanik, Bela Ban
See Also:
  • Field Details

    • log

      protected final org.apache.commons.logging.Log log
  • Constructor Details

    • ClassConfigurator

      public ClassConfigurator()
  • Method Details

    • init

      public void init() throws ChannelException
      Throws:
      ChannelException
    • getInstance

      public static ClassConfigurator getInstance(boolean init) throws ChannelException
      Throws:
      ChannelException
    • getInstance

      public static ClassConfigurator getInstance() throws ChannelException
      Throws:
      ChannelException
    • add

      public void add(short magic, Class clazz) throws IllegalArgumentException
      Method to register a user-defined header with jg-magic-map at runtime
      Parameters:
      magic - The magic number. Needs to be > 1024
      clazz - The class. Usually a subclass of Header
      Throws:
      IllegalArgumentException - If the magic number is already taken, or the magic number is invalid input: '<'= 1024
    • get

      public Class get(short magic)
      Returns a class for a magic number. Returns null if no class is found
      Parameters:
      magic - the magic number that maps to the class
      Returns:
      a Class object that represents a class that implements java.io.Externalizable
    • get

      public Class get(String clazzname)
      Loads and returns the class from the class name
      Parameters:
      clazzname - a fully classified class name to be loaded
      Returns:
      a Class object that represents a class that implements java.io.Externalizable
    • getMagicNumber

      public short getMagicNumber(Class clazz)
      Returns the magic number for the class.
      Parameters:
      clazz - a class object that we want the magic number for
      Returns:
      the magic number for a class, -1 if no mapping is available
    • getMagicNumberFromObjectStreamClass

      public short getMagicNumberFromObjectStreamClass(ObjectStreamClass objStream)
    • getObjectStreamClassFromMagicNumber

      public ObjectStreamClass getObjectStreamClassFromMagicNumber(short magic_number)
    • toString

      public String toString()
      Overrides:
      toString in class Object
    • printMagicMap

      public String printMagicMap()
    • printClassMap

      public String printClassMap()
    • main

      public static void main(String[] args) throws Exception
      Throws:
      Exception