IT. Expert System.

Direct Known Subclasses:

DdmHandleAppName, DdmHandleExit, DdmHandleHeap, DdmHandleHello, DdmHandleNativeHeap, DdmHandleProfiling, DdmHandleThread

public abstract class ChunkHandler
extends Object

• Field Summary

  Fields

  Modifier and Type	Field and Description
  static int	CHUNK_FAIL
  static ByteOrder	CHUNK_ORDER

• Constructor Summary

  Constructors

  Constructor and Description
  ChunkHandler()

• Method Summary

  Methods

  Modifier and Type	Method and Description
  abstract void	connected() Called when the DDM server connects.
  static Chunk	createFailChunk(int errorCode, String msg) Create a FAIL chunk.
  abstract void	disconnected() Called when the DDM server disconnects.
  static String	getString(ByteBuffer buf, int len) Utility function to copy a String out of a ByteBuffer.
  abstract Chunk	handleChunk(Chunk request) Handle a single chunk of data.
  static String	name(int type) Convert an integer type to a 4-character string.
  static void	putString(ByteBuffer buf, String str) Utility function to copy a String into a ByteBuffer.
  static int	type(String typeName) Convert a 4-character string to a 32-bit type.
  static ByteBuffer	wrapChunk(Chunk request) Utility function to wrap a ByteBuffer around a Chunk.

  • Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• Field Detail

  • CHUNK_ORDER

    public static final ByteOrder CHUNK_ORDER

  • CHUNK_FAIL

    public static final int CHUNK_FAIL

• Constructor Detail

  • ChunkHandler

    public ChunkHandler()

• Method Detail

  • connected

    public abstract void connected()

    Called when the DDM server connects. The handler is allowed to send messages to the server.

  • disconnected

    public abstract void disconnected()

    Called when the DDM server disconnects. Can be used to disable periodic transmissions or clean up saved state.

  • handleChunk

    public abstract Chunk handleChunk(Chunk request)

    Handle a single chunk of data. "request" includes the type and the chunk payload. Returns a response in a Chunk.

  • createFailChunk

    public static Chunk createFailChunk(int errorCode,
                        String msg)

    Create a FAIL chunk. The "handleChunk" methods can use this to return an error message when they are not able to process a chunk.

  • wrapChunk

    public static ByteBuffer wrapChunk(Chunk request)

    Utility function to wrap a ByteBuffer around a Chunk.

  • getString

    public static String getString(ByteBuffer buf,
                   int len)

    Utility function to copy a String out of a ByteBuffer. This is here because multiple chunk handlers can make use of it, and there's nowhere better to put it.

  • putString

    public static void putString(ByteBuffer buf,
                 String str)

    Utility function to copy a String into a ByteBuffer.

  • type

    public static int type(String typeName)

    Convert a 4-character string to a 32-bit type.

  • name

    public static String name(int type)

    Convert an integer type to a 4-character string.