

			     History List
			     ============

[For current version, see file Version.java (or invoke 'java JavaGroups.Version')]






Version 0.5.8 Feb 5 1999 (bba)
------------------------------

- Changed Ctor, Close, Connect and Disconnect in JChannel (only
  implementation): when disconnecting, a channel is not supposed to
  receive any more messages (this was the case). Also, a process has
  to acquire a new local address when re-joining (this was not the
  case).



Version 0.5.7 Feb 1 1999 (bba)
------------------------------

- Added protocol UNI: uniform failure-atomic group mcast
- Added protocol PING: get initial members and periodical sending of
  i-am-alive message (used to overcome partitions)
- Changed GMS/GmsImpl to make use of PING




Version 0.5.6 Jan 19 1999 (bba)
-------------------------------

- Added ./Algorithms/GroupRequest, ./Algorithms/AndCommand
- Added RequestCorrelator
- Moved JavaStack/Event.java to ./Event.java. Internal channel
  implementations use now Event instead of QueueItem (code reduction)




Version 0.5.5 Jan 14 1999 (bba)
-------------------------------

- Renamed ./algorithms to ./Algorithms



Version 0.5.4 Jan 13 1999 (bba)
-------------------------------

- Back to square 1: dropped unicast mode altogether, essentially back
  to version 0.5.2 !



Version 0.5.3 Jan 4 1999 (bba)
-------------------------------

- Changed unicast interface. Renamed Connect() to Join() and
  Disconnect() to Leave().
- A channel is now operational for unicast messages after the
  Channel() constructor has been called. Only when Join() is called
  will it be able to send/receive group messages.
- The changes to the interfaces/classes require application programs
  usingt version 0.5.2 to be modified and recompiled.



Version 0.5.2 Dec 29 1998 (bba)
-------------------------------

- Modifications in the event sequence when creating a channel and when
  connecting to it (START, STARYT_OK, CONNECT, CONNECT_OK, DISCONNECT,
  DISCONNECT_OK, STOP, STOP_OK)
- Got rid of LowLevelCommunication interface
- Local address is set by SET_LOCAL_ADDRESS (sent up by lowest layer)
- Peer address is set by CONNECT(peer_addr)



Version 0.5.1 Dec 22 1998 (bba)
--------------------------------

- Fairly extensive changes to the Channel interface: changed
  ChannelFactory, Connect() and Receive(). Receive() now returns
  Objects rather than Message. These might be Messages, Views or
  Blocks. Channel is now pure pull-oriented. Removed Cast() and
  several Send() methods.



Version 0.5 Dec 21 1998 (bba)
-----------------------------

- Added new protocol PT2PT: TCP-like reliable point to point connection
- Changed Channel interface: separation of channel creation, Connect(),
  removal of Destroy() -> existing programs will need to be modified
  to use the new classes

- The changes to the interfaces/classes require application programs
  written for version 0.4 to be modified and recompiled.



Version 0.4 Dec 10 1998 (bba)
-----------------------------

- Added several new protocols (MACK, MNAK)
- Fixed IP MCAST bug (UDP.java)
- Fixed gossip bug (UDP.java)


Version 0.3 Oct 1998
--------------------

- First version (0.3) released (bba)
