RoadMapOverview

Overview of Clustering roadmaps (JGroups, JBossCache, POJOCache, JBoss Clustering)

 

We always try to plan 2 versions ahead for all projects under Clustering.

The release overview below summarizes the main features of each release

 

 

JGroups (lead: Bela Ban)

 

2.4.2

  • Released in Feb 2008

 

2.5.2

  • Last version released, EOL'ed

 

2.6.2

Target date: Feb 2008

  • Stable branch for JBoss 5 (hopefully we get 2.6.3 into JBoss 5, target date: march 15 2008)

  • Shared transport

  • FLUSH simplification and improvements

  • Multiplexer and MuxChannel bug fixes

 

2.7

Target date: n/a

  • We'll leave this branch open and backport all bugs to the 2.6 branch

 

 

JBoss Cache (lead: Manik Surtani)

 

Please refer to

this page.

for detailed JIRA tasks (more up to date).

 

JBoss Cache 2.2.0

  • Core architectural change introducing a visitor/command pattern for each cache command

  • Improved unit tests

 

JBoss Cache 3.0.0

  • MVCC

 

JBoss Cache 3.1.0

  • New state transfer algorithm

 

JBoss Cache 3.2.0

  • Partitioning

 

POJO Cache (lead: Jason Greene)

See roadmap for latest information.

POJO Cache Cache 2.1 release

  • AS5 compliance

  • Context API with the ability to selectively enable/disable gravitation

  • Support for final fields

  • JBoss AOP 2.0

  • Support for Java Security Manager

  • Support for objects that are missing a no-arg constructor

  • FQN versions of POJO Cache methods

  • exist() method for improving performance with JDBCCacheLoader

  • Bug Fixes

 

POJO Cache 2.2 release

  • Array interception

  • Static fields

  • Ability to release objects (object is removed, but data remains in cache)

 

POJO Cache 3.0 release

  • Adjust to MVCC locking

  • Collection performance refactor

 

JBoss Clustering (lead: Brian Stansberry)

 

See AS Clustering by release in JIRA for more details.

 

JBoss AS 4.2.0.CR1 Release (March 5, 2007)

 

  • Upgraded JGroups from the 2.2.7 used in 4.0.x to 2.4.1.

  • Proper handling of clustered EJB3 SFSBs

  • Resolved classloading issues with clustered EJB3 entities

  • Configurable policies for determining HASingleton master

 

JBoss AS 4.2.0.GA Release (April 17, 2007)

 

  • Move to JBoss Cache 1.4.1.SP3 and JGroups 2.4.1.SP1

 

JBoss AS 5.0.0.Beta3 Release

 

  • Streaming state transfer for ClusterPartition

  • Performance and stability testing of shared JGroups channel used by multiple services (ClusterPartition, HttpSession, EJB3, JBM)

  • Passivation of distributed sessions

 

JBoss AS 5.0.0.GA Release

 

  • Clustered deployments using the Profile Service

  • Sharable http sessions

  • Unified client side failover/load-balancing on top of Remoting

 

JBoss AS 5.0.1.GA Release

 

  • Pluggable policies (a la "useJK") to integrate with load balancers

  • Properly handle merging state following a JGroups merge

  • EJB3 fine-grained SFSB replication using PojoCache

Compatibility

 

Rules for API and binary compatibility

  • Major: 1, minor: 1.1, micro: 1.1.1

  • API compatibility: breaking is allowed only between major versions. Note that additional methods in an API doesn't constitute breaking, so this is okay

  • Binary compatibility: breaking is allowed between minor versions

  • Configuration compatibility: breaking is allowed between minor versions

  • Changes between micro versions: only implementation changes

 

We're currently looking into how to provide backwards and forward binary compatibility for JGroups and JBoss Cache

 

Compatibility Matrix -- JBoss AS / JBoss Cache / JGroups

 

This page documents what versions of JGroups and JBoss Cache ship with and work with each other and with JBoss AS.  This includes information on which combinations have been officially certified by QA.