Apache Jackrabbit 2.9.1 发布，JSR-170 内容管理

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3月21日 深圳 OSC 源创会开始报名罗，送华为海思开发板
　　Apache Jackrabbit 2.9.1 发布，Apache Jackrabbit 是由 Apache Foundation 提供的 JSR-170 的开放源码实现..
　　随着内容管理应用程序的日益普及，对用于内容仓库的普通、标准化 API 的需求已凸现出来。Content Repository for
Java Technology API (JSR-170) 的目标就是提供这样一个接口。JSR-170
的一个主要优点是，它不绑定到任何特定的底层架构。例如，JSR-170 实现的后端数据存储可以是文件系统、WebDAV 仓库、支持 XML
的系统，甚至还可以是 SQL 数据库。此外，JSR-170 的导出和导入功能允许一个集成器在内容后端与 JCR 实现之间无缝地切换。

　　完整改进记录：
Improvements
  [JCR-3803] Local cache contention lead to performance degradation
  [JCR-3804] [jackrabbit-aws] Allow http communication to S3
  [JCR-3810] StreamWrapper can attempt to reset other types of InputStreams
  [JCR-3815] Local Cache Purge Cause Performance Issues
  [JCR-3817] [jackrabbit-aws-ext] Performance of operation degrades
while running DS GC
  [JCR-3818] Use SimpleFSDirectory by default
  [JCR-3825] Use RepositoryFactory for first hops
  [JCR-3826] AbstractPrincipalProvider cachesize is not configurable
  [JCR-3838] [aws-ext] Proactive & Asynchronous caching of binary when
its metadata is accessed from S3
  [JCR-3843] [jackrabbit-aws-ext] Support S3 in Franfurt Datacenter
  [JCR-3844] JcrRemotingServlet does not log full stacktrace
  [JCR-3845] Have AuthorizableQueryManager Support Specifying Sort
Ignore Case Mode
Bug fixes
  [JCR-3274] jackrabbit-standalone-2.4.0.jar Populate does not work
  [JCR-3805] LocalCache doesn't build up properly in JDK 7.
  [JCR-3809] ConnectionHelper swallows exception when it fails to
reset binary streams after a failed SQL statement execution
  [JCR-3816] [aws-ext]S3DS not able update lastModified of record > 5GB
  [JCR-3821] SeededSecureRandom thread can prevent Jackrabbit from shutting down
  [JCR-3839] [aws-ext] Regression to JCR-3734 Slow local cache built-up time
  [JCR-3840] NodeTypeDefDiff does not take same-name child type
definitions into account
Tasks
  [JCR-3830] Allow for privilege discovery in jcr-server
  [JCR-3833] Compatibility with Java 8
Sub-tasks
  [JCR-2113] JSR 283 Access Control Management (JCR-2003 - JCR2SPI /
SPI: Add support for JCR 2.0)