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HOWL is a logger implementation providing features required by the ObjectWeb JOTM project, with a public API that is generally usable by any Transaction Manager. HOWL uses unformatted binary logs to maximize performance and specifies a journalization API with methods necessary to support JOTM recovery operations.
HOWL is intended to be used for logging of temporary data such as XA transaction events. HOWL is not a replacement for traditional log kits such as LOG4J and Java SE Logging.
Tuesday, January 2, 2007
Release HOWL_1_0_2 published.
Friday, April 21, 2006
Release HOWL_1_0_1 published.
Wednesday, December 07, 2005
Release HOWL_1_0_0 published.
Thursday, September 08, 2005
TAG HOWL_0_1_11 committed to CVS.
Friday, August 19, 2005
TAG HOWL_0_1_10 committed to CVS.
Friday, June 17, 2005
TAG HOWL_0_1_9 committed to CVS.
Friday, April 15, 2005 HOWL web site download page updated. Module names revised to include "howl/" prefix.
Wednesday, March 02, 2005
TAG HOWL_0_1_8 was created November 11, 2004.
Wednesday, November 17, 2004
Michael Giroux presents HOWL at ApacheCon '2004 in
Friday, September 10, 2004
New TAG HOWL_0_1_7
Friday, August 27, 2004 WEB committed to CVS.
Friday, August 20, 2004 Updated test cases committed to CVS. New TAG is HOWL_0_1_6.
Projects using HOWL
The ObjectWeb JOTM project has integrated the HOWL logger to record XA 2-phase commit activity and support recovery from system failures.
JOTM is the default transaction manager for the ObjectWeb JOnAS project.
The Apache Geronimo project has plans to integrate JOTM, and has integrated the HOWL logger with an interim transaction manager that is being used until JOTM recovery functionality is available.
The ActiveMQ project is integrated with Apache Geronimo as the default JMS provider. The project is using the HOWL Logger to provide message persistence.
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