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From Berin Loritsch <>
Subject Avalon Excalibur Final Release Available
Date Tue, 11 Sep 2001 18:37:27 GMT
Avalon Excalibur 4.0 Released
 The Avalon team is proud to announce the 4.0 final
 release of the Avalon Excalibur.

About Avalon
 The Avalon project is Apache's Java Server Framework.
 It is separated into five sub projects: Framework,
 Excalibur, LogKit, Cornerstone, and Phoenix. Its
 purpose is to simplify server side programming for
 Java based projects. It formalizes serveral best
 of breed practices and patterns for server side programming.

For more information about Avalon, please go to

About Avalon Excalibur 4.0
 Avalon Excalibur contains several premade Avalon
 Components and utilities to make your server side
 programming easier. There are several pool implementations,
 Component management implementations, and database
 management implementations.

For more information about Avalon Excalibur 4.0, please go to

ChangeLog for Avalon Excalibur 4.0

*)  Update user docs. [BL]

*)  Remove dead code in scratchpad. [PD]

*)  Rework thread pooling package to a new design. This
 provides a mechanism to run a cleanup thread when
 the JVM is killed. [PD]

*)  Add classloader extension framework into the extension
 package. [PD]

*)  Add Container mechanism from Avalon Phoenix. [PD]

*)  Add support for recursive property resolution.
 Added appropriate unit test to accompany feature.
 (Property utils). [PD]

*)  Problem Fixed: I've encountered a problem with the
 SingleThreadedPool in that it alternatley returns
 valid and null pooled objects until you've got the
 "initial" constructor argument + 1 and then it starts
 returning (Poolable)m_factory.newInstance().
 Submitted by: "Corey O'Donovan". [PD]

*)  Fix some bugs found by Pool Profiling tests. [BL]

*)  Add new resource monitoring facility. This allows
 you to actively monitor resources and be notified
 if they are changed by outside forces. [BL]

*)  Set hierarchy via constructor to allow LogKit to
 work in sub classloaders. Submitted By: Sylvain
 Wallez. [DP]

*)  Update FileUtils with methods to count size of a directory,
 input argument check, fix javadoc, and method to
 convert an array of Files into URLs. [DP]

*)  ClassLoaderObjectInputStream moves from Cornerstone
 to Excalibur. [PH]

*)  Promote the i18n ResourceManager code to Excalibur
 production. [DP]

*)  Updated log messages for JdbcConnection--as well
 as added runtime detection if no connections could
 be created. This provides better reporting if the
 connection has configuration errors or other mitigating
 errors. [BL]

*)  Add direct support for Informix connection pooling.
 Requires the most recent JDBC drivers from Informix
 to use this feature. [BL]

*)  Deprecated the oradb attribute in JdbcDataSourceComponent,
 and added a keepalive element.This way we can test
 the line with valid SQL statements no matter what
 the DB is. Informix had trouble with the "select 1"
 and I am sure there are others. [BL]

*)  Fix bugs found by ReadWriteLock Test Case in the concurrent
 package. [BL]

*)  Update component package with support for Paremeterizable
 components (patch from Mircea Toma) [DP]

*)  Add support to display if an option is required. Patch
 was from Tom Jordahl (from xml-axis project). [BL]

*)  Fixed bug "CLArgsParser loops infinitely on OPTIONAL
 options" like "-Fa -B" where F optionally has an argument.
 Added unit tests to verify that it has been fixed. [PD]

*)  Update javadocs with '@since' tags so that we know
 when components have been introduced. [JT]

*)  Update JDBC datasource component so that you can
 specify your keep-alive query. This is for databases
 that don't like "SELECT 1;" as a query. [BL]

*)  Add new JUnit TestCase for automatically setting
 up Avalon Components and running tests. [GP]

*)  Fix a number of tests, and provided a couple new tests. [BL]

*)  Fix build process for tests and fix some of the tests. [PD]

*)  Add new LogKit Management framework to allow each
 component to have unique logger implementations
 and provide fine grained control over logging. [GP]

*)  Add new JNDI package to Excalibur with Memmory and
 RMI providers. [PD]

*)  Updated Announcement.xml to not refer to Testlet
 anymore. [BL]

Downloads for Avalon Excalibur 4.0 available at

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