Oracle Berkeley DB 中国研发团队的博客

Resources

• The Berkeley DB Java Edition FAQ has useful tips and should be a first stop when trouble shooting problems.
• You can find product information, datasheets, and whitepapers on the JE home page on OTN.
• All JE release images are on the JE download page.
• The JE documentation page has Javadoc, Getting Started Guides and tutorials.
• Here is the JE License.
• Charles Lamb, a JE developer, blogs about usage tips, announcements, and developer anecdotes.
• There’s a whitepaper called Performing Queries in Oracle Berkeley DB Java Edition. The whitepaper takes common SQL queries and shows how to execute the same logic using the Direct Persistence Layer (DPL). The goal is to give users who are familiar with SQL some help in learning how to use the DPL.
• Chinese language JE blogs are available at www.bdbchina.com
• Application source code examples are included as part of the Berkeley DB JE distribution in the examples directory.

Thanks to Chris Eastland at Nebula Software Systems for the screen shot of this cool Google Maps/Android app built on BDB JE. The location data is stored in a JE database running on the device.

See the details at Charles Lamb’s blog at http://blogs.oracle.com/charlesLamb/2010/02/berkeley_db_java_edition_andro.html .

Charles Lamb (BDB-JE 架构师) 最近发表的一篇关于在Google Android运行Berkeley DB Java Edition的白皮书。书中简要描述了JE在在Android平台上运行的一些优势和特点，诸如性能，可扩展性，索引，并发控制，事务和多对多的 事物-线程映射模型。

原文地址： http://www.oracle.com/technology/products/berkeley-db/pdf/bdb-je-android.pdf .

In his blog ( http://blogs.sun.com/jhalex/entry/handling_transactions_in_bdb_je ), Jeff Alexander of Sun’s project Aura describes how they’ve standardized on a calling convention for JE which provides uniform, yet flexible, transaction and exception handling.

有来自开源社区的BDB-JE用户写的一篇博客，介绍了如何在JSP中使用JE来存取Java对象。英文好的朋友或者项目中有类似需求的朋友，不妨看看。原文地址为：http://reecegriffin.com/blog/berkeleyje.html。

在这篇博客中，作者简要提到了最新的JE 4.0 发布的新特性 – Replication。简言之就是支持高可用或集群功能，并提供了软件和硬件层面的负载均衡。个人认为，JE 4.0的高可用功能绝对是任务密集型的、要求7×24小时高可用的J2EE应用项目中的利器啊。

最后，欢迎留言。

首先祝各位访客新年快乐，虎年富贵吉祥！

Oracle Berkeley DB在LinkedIn.com上的新建了一个群，供全球的相关人士（包括工程师、产品经理、客户等）共同讨论Berkeley DB的话题和业界动态。群地址：http://www.linkedin.com/groups?gid=2131985. 欢迎加入！

Oracle Berkeley DB 中国研发团队

The Oracle Berkeley DB team is pleased to announce the availability of Berkeley DB Java Edition for all supported platforms (BDB JE).

One major focus of Berkeley DB has been replication for high availability (HA), the other is support for the Google Android phone platform.
* Read the new “BDB JE on Android” whitepaper
* See a screenshot of JE running on Android storing map coordinates displayed on Google Maps
* Search Oracle.com for Android (google: “site:oracle.com android”) note that most results are about BDB JE

Berkeley DB Java Edition (JE) 4.0.92

Includes the following new features and changes:

* Enhancements have been added for JE High Availability, which supports the use of JE with replication.
* The monitor package has several new event types which help a replicated application track replication group changes. A new example has been added to the replication example group to illustrate the use of RMI in replication write request forwarding.
* New properties have been added to help administer a replication group in the face of major hardware failure.
* A new RMI based example has been added to the set of JE HA Examples.
* See the High Availability Guide for an introduction to the product, and the com.sleepycat.je.rep javadoc for API specifications.
* JE’s MBeans and JConsole plugin have several new methods and capabilities to improve the ability to monitor an application. See the how-to for more information.
* Changes were made to make it easier to control JE’s use of java.util.logging through programmatic means.
* A number of bug fixes were made to work around problems in the Dvalvik libraries used by Android applications.
* A number of general bug fixes, performance improvements, and documentation improvements were made.

Software Downloads

* Downloads available today at http://download.oracle.com/berkeley-db/je-4.0.92.zip.

Questions?

Please direct your questions to our OTN forum at http://forums.oracle.com/forums/forum.jspa?forumID=273.