PK85622: PROBLEMS WITH THE SPI EXPOSED BY WEBSPHERE DYNACACHE FOR CACHE PROVIDERS

Fixes are available

APAR status

Closed as program error.

Error description

The SPI exposed by WebSphere Dynacache for cache providers has
the following issues:
1. Javadoc is incomplete and needs clarifications at multiple
places
2. Some of the core caching methods are not consumable or
designed for performance.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V7.0 & V6.1 that leverage caching    *
*                  via an alternate cache provider configured  *
*                  with DynaCache.                             *
****************************************************************
* PROBLEM DESCRIPTION: Some of the methods exposed in the      *
*                      CacheProvider Service Provider          *
*                      Interface (SPI) are not consumable      *
*                      and designed for performance for cache  *
*                      providers.                              *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The CacheProvider SPI in V7.0 missed a couple
of important functions:
1. passing DynaCache custom properties and system custom
properties to the cache providers via the
com.ibm.wsspi.cache.CacheConfig interface
2. returning the older Cacheentry when an update was made to an
existing entry in the com.ibm.wsspi.cache.CoreCache. The
Javadoc of the CacheProvider SPIs was not clear with respect
to error & exception handling  during cache creation.

The same SPIs are also being provided starting in V6.1.0.27
for use by V6.1 customers.

Problem conclusion

The following SPI changes will be made in this APAR.
- Added public Map<String, String> getProperties() method to
the com.ibm.wsspi.cache.CacheConfig interface.
- Changed the signature of the
com.ibm.wsspi.cache.CoreCache.put(EntryInfo, Object) method to
return a com.ibm.websphere.cache.CacheEntry.

The Javadoc of the CacheProvider SPIs has been improved.

The changes made  in this APAR help cache providers  integrate
better with DynaCache and make the whole caching solution more
maintainable, consumable, reliable and high performing.

The fix for this APAR is currently targeted for inclusion in
fix pack 7.0.0.5 and 6.1.0.27.  Please refer to the Recommended
Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PK85622
Reported component name
WEBSPHERE APP S
Reported component ID
5724J0800
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-04-29
Closed date
2009-05-11
Last modified date
2009-06-23

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WEBSPHERE APP S
Fixed component ID
5724J0800

Applicable component levels

R700 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
29 December 2021

Tips

PK85622: PROBLEMS WITH THE SPI EXPOSED BY WEBSPHERE DYNACACHE FOR CACHE PROVIDERS

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R700 PSY

Document Information

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