andyj2ee

系统cvs to Git 迁移

迁移简介

应用工具：cvs2git

工作原理：文件系统的copy, from cvs repository to export temp file, then import to Git repository.

使用条件: Git version 1.5.4.4 or later (我们的目标 git 库版本：

git --version

git version 1.9.0

git --version
git version 1.9.0

cvs2git工具安装

迁移过程

具体的迁移过程：

以下为迁移wxxr-core-framework

1. 在123.1上用cvs2git把cvs仓库，导出成git的备份文件（blob file and dump file）

• cvs2git --blobfile=/tmp/cvs2git/output/git-blob-cfw.dat --dumpfile=/tmp/cvs2git/output/git-dump-cfw.dat --username=zhangjunqing --fallback-encoding=GBK /app/cvsroot/wxxr-projects/wxxr-core-framework
• 创建本地git仓库 
  • git init --bare wxxr-core-framework.git

• 下载导出的git的备份文件到本地临时目录 **
  • cd /Users/zhangjq/temp/cvs2git
  • scp -r djboss@192.168.123.1:/tmp/cvs2git/output/git-* . 
• 用git的fast-import命令把从cvs导出的git备份文件导入刚创建的git仓库** cd /Users/zhangjq/git/wxxr-core-framework/wxxr-core-framework.git** cat /Users/zhangjq/temp/cvs2git/git-blob-cfw.dat /Users/zhangjq/temp/cvs2git/git-dump-cfw.dat | git fast-import
• 在Stash 上创建远程仓库** 创建了framework-core 仓库集，并在此仓库集下创建了wxxr-core-framework, wxxr-core-web  等远程仓库**http://developer.corp.wxxr.com.cn/git/projects/FRMCORE/repos/wxxr-core-framework/browse
  •  
• 在本地执行** git branch -D TAG.FIXUP (执行git branch -a 没有找到这个分支，为什么删除？error: branch 'TAG.FIXUP' not found. )

• • git gc --prune=now

• • git remote add origin http://xxxxx@developer.corp.wxxr.com.cn/git/scm/frmcore/wxxr-core-framework.git

• • git push --all origin  (将本地的所有分支都推送到远程主机)
  • git push -tags origin (最后，git push不会推送标签（tag），除非使用-tags选项。)
• 至此，完成了wxxr-core-framework的迁移。下一步执行比较验证。

Git 时不时地将这些对象打包至一个叫 packfile 的二进制文件以节省空间并提高效率。当仓库中有太多的松散对象，或是手工调用git gc 命令，或推送至远程服务器时，Git 都会这样做。

附：迁移脚本

迁移验证

用本地cvs代码库代码与git下载的库代码比较，有$Revision$ 的少版本信息外，其它一切正常。

迁移报告

wxxr-core-framework

cvs2svn Statistics:
------------------
Total CVS Files:              3000
Total CVS Revisions:          9439
Total CVS Branches:          33449
Total CVS Tags:            3278944
Total Unique Tags:            2446
Total Unique Branches:          24
CVS Repos Size in KB:       159751
Total SVN Commits:            5260
First Revision Date:    Wed May 31 15:56:03 2006
Last Revision Date:     Sun Jan  4 17:22:23 2015
------------------
Timings (seconds):
------------------
1065   pass1    CollectRevsPass
0   pass2    CleanMetadataPass
0   pass3    CollateSymbolsPass
648   pass4    FilterSymbolsPass
1   pass5    SortRevisionsPass
37   pass6    SortSymbolsPass
436   pass7    InitializeChangesetsPass
82   pass8    BreakRevisionChangesetCyclesPass
82   pass9    RevisionTopologicalSortPass
296   pass10   BreakSymbolChangesetCyclesPass
406   pass11   BreakAllChangesetCyclesPass
413   pass12   TopologicalSortPass
319   pass13   CreateRevsPass
159   pass14   SortSymbolOpeningsClosingsPass
15   pass15   IndexSymbolsPass
432   pass16   OutputPass
4391   total

fast-import wxxr-core-framework source code:

git-fast-import statistics:
---------------------------------------------------------------------
Alloc'd objects:      45000
Total objects:        41365 (      2260 duplicates                  )
blobs  :         7817 (       709 duplicates       6887 deltas of       7248 attempts)
trees  :        30677 (      1551 duplicates      12608 deltas of      29589 attempts)
commits:         2871 (         0 duplicates          0 deltas of          0 attempts)
tags   :            0 (         0 duplicates          0 deltas of          0 attempts)
Total branches:        2472 (        24 loads     )
marks:     1073741824 (     11397 unique    )
atoms:           2772
Memory total:          4532 KiB
pools:          2423 KiB
objects:          2109 KiB
---------------------------------------------------------------------
pack_report: getpagesize()            =       4096
pack_report: core.packedGitWindowSize = 1073741824
pack_report: core.packedGitLimit      = 8589934592
pack_report: pack_used_ctr            =      23737
pack_report: pack_mmap_calls          =        824
pack_report: pack_open_windows        =          1 /          1
pack_report: pack_mapped              =    7439224 /    7439224
---------------------------------------------------------------------

:)

posted @ 2015-01-13 18:53 java光环 阅读(724) | 评论 (0) | 编辑 收藏

异常：java.lang.ArrayIndexOutOfBoundsException: 48188

posted @ 2014-12-17 15:27 java光环 阅读(3680) | 评论 (0) | 编辑 收藏

如何成为一名软件架构师？

Daniel Mohl是一名专业的软件工程师/架构师，他的兴趣包括理解各种复杂的编程语言、企业应用架构以及如何搭建业务与技术，他通晓F#、C#、 CoffeeScript、JavaScript、Erlang、ASP.NET、MVC、WPF、WCF、Sliverlight、SQL Server等技术。有着多年的软件开发经验。

他经常会被一些有潜力和有前途的程序员问到：“我要怎么做才能成为一名架构师？”说实话，这已经是老生常谈的话题了，答案当然是视情况而定。不过他也根据自己的经验，给大家一些建议，并且提供一些资料，助你快速走上架构师这条道路。

下面是Daniel Mohl所提出的列表，供大家参考：

首先，你必须不断地寻求改善和提升自己。而提升自己的最好方法是阅读，下面有几本书，对我的软件架构技能的提升很大。推荐给大家：

• 软件架构师应该知道的97件事
• 企业应用架构模式
• 敏捷软件开发，原则，模式和实践
• 企业集成模式
• JavaScript语言精髓
• 利用遗留代码有效地工作
• 领域驱动设计
• 企业架构策略
• 设计模式（四人帮）
• The Goal
• SOA设计模式
• SOA Principles of Service Design

除了阅读，还有没有其他需要注意的、或者在平时需要关注的东西呢？

• 每隔一两年学习一门新语言，F#是个不错的选择。
• 选择一个重点领域，但是尽可能对许多技术有个高层次的理解
• 对你所关注的重点领域，开通一个博客并且继续拓展该领域的知识面，让自己渐渐成为一名专家。
• 与不同的技术、编程语言、设计模式和结构等（甚至是它并没有在日常中给予你直接的帮助）打交道。你永远都不知道这些知识是否会在未来派上用场，但是对你绝对是有益无害。
• 根据你的目标受众来谈论“语言”。作为一名架构师，你将会与各种各样等级的人打交道，并且他们对技术的理解也会有所不同。所以要学会调整你的讲解方式，做到因人制宜，让他们能够理解。
• 阅读博客、观看/参加Twitter或G+、听播客、读杂志、参加用户小组会议和技术会议，并且在这些会议上踊跃发言。这些都会给你带来无穷无尽的知识和乐趣，建立自己的“品牌”和提供交流机会。
• 纪律是关键。永远做你自己最喜欢的工作，即使它听起来不那么有趣。每天安排时间学习一些新的东西，即使是15分钟也可，千万不要被其他事情占用了这段时间。
• 开启博客之旅。我发现，与阅读比起来，把东西写下来会让你有更深入的理解。
• 利用好“闲暇时间”，这段时间可以拿本杂志读读，或者去听听播客等。
• 了解各种可用的开发工具，可以使架构师的工作更好、更有效
• 看许多不同项目里的架构
• 学习各个项目的管理方法
• 学习一些评估技术，对业务可以提供有价值的评估

上面是作者总结出来的列表，虽然看起来有点枯燥无味，但在整个软件开发过程中是乐趣无穷的。如果你还有更好的建议，欢迎与我们分享。

来自：How to Become a Software Architect

posted @ 2014-06-18 22:49 java光环| 编辑 收藏

Maven3 在Mac平台安裝

posted @ 2011-05-31 14:12 java光环 阅读(3955) | 评论 (0) | 编辑 收藏

jboss AS 使用websphere MQ 连接方式

posted @ 2009-08-04 14:00 java光环 阅读(828) | 评论 (0) | 编辑 收藏

了解OptimalJ

开发工具

定制

架构师

只读

posted @ 2009-03-19 12:59 java光环 阅读(286) | 评论 (0) | 编辑 收藏

tomcat 如何跟踪调试

posted @ 2008-08-28 15:46 java光环 阅读(1638) | 评论 (1) | 编辑 收藏

linux 下的jadclipse plugin 的安装

posted @ 2008-04-30 13:56 java光环 阅读(1767) | 评论 (0) | 编辑 收藏

PSIVTRun jndi 验证成功

posted @ 2008-03-25 14:45 java光环 阅读(815) | 评论 (0) | 编辑 收藏

websphere mq 不能访问集群中其它节点对列

posted @ 2008-03-23 22:06 java光环 阅读(3223) | 评论 (0) | 编辑 收藏

tomcat 不能启动

严重: IOException while loading persisted sessions: java.io.EOFException
严重: Exception loading sessions from persistent storage

原因是tomcat对硬盘的session读取失败，彻底解决办法一下：将work下面的文件清空，主要是*.ser文件，或者只是删除掉session.ser即可以解决。

posted @ 2008-03-20 16:41 java光环 阅读(1176) | 评论 (1) | 编辑 收藏

mysql 用户授权

posted @ 2008-03-06 18:15 java光环 阅读(355) | 评论 (0) | 编辑 收藏

查主键冲突所在的表语句

posted @ 2007-11-28 14:19 java光环 阅读(686) | 评论 (0) | 编辑 收藏

win xp 下实现的linux MQ6.0 远程队列管理

posted @ 2007-10-19 18:16 java光环 阅读(1030) | 评论 (0) | 编辑 收藏

activemq-4.2 SNAPSHOT 嵌入到jboss-4.0.3sp1的异常

下载包为：
activemq-rar-4.2-incubator-SNAPSHOT-20070121.082022-22.rar

异常1：

    [java] 00:58:46,434 WARN  [ServiceController] Problem starting service jboss.jca:service=RARDepl
oyment,name='activemq-rar-4.2-incubator-SNAPSHOT-20070121.082022-22.rar'
    [java] javax.resource.spi.ResourceAdapterInternalException: Failed to startup an embedded broker
: xbean:broker-config.xml, due to: java.lang.IllegalStateException: Could not find valid implementat
ion for: 2.0
    [java]      at org.apache.activemq.ra.ActiveMQResourceAdapter.start(ActiveMQResourceAdapter.java
:83)
    [java]      at org.jboss.resource.deployment.RARDeployment.startService(RARDeployment.java:107)
    [java]      at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:
274)
    [java]      at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.j
ava:230)
    [java]      at org.jboss.system.ServiceDynamicMBeanSupport.invoke(ServiceDynamicMBeanSupport.jav
a:110)
    [java]      at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:150)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:943
)
    [java]      at $Proxy0.start(Unknown Source)
    [java]      at org.jboss.system.ServiceController.start(ServiceController.java:428)
    [java]      at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
    [java]      at $Proxy33.start(Unknown Source)
    [java]      at org.jboss.deployment.SimpleSubDeployerSupport.startService(SimpleSubDeployerSuppo
rt.java:330)
    [java]      at org.jboss.deployment.SimpleSubDeployerSupport.start(SimpleSubDeployerSupport.java
:112)
    [java]      at org.jboss.deployment.MainDeployer.start(MainDeployer.java:989)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:790)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:753)
    [java]      at sun.reflect.GeneratedMethodAccessor40.invoke(Unknown Source)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)

    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
    [java]      at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperatio
nInterceptor.java:127)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
    [java]      at $Proxy9.deploy(Unknown Source)
    [java]      at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.jav
a:319)
    [java]      at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:
507)
    [java]      at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(Abstr
actDeploymentScanner.java:192)
    [java]      at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeplo
ymentScanner.java:265)
    [java]      at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:
274)
    [java]      at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.j
ava:230)
    [java]      at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:943
)
    [java]      at $Proxy0.start(Unknown Source)
    [java]      at org.jboss.system.ServiceController.start(ServiceController.java:428)
    [java]      at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
    [java]      at $Proxy4.start(Unknown Source)
    [java]      at org.jboss.deployment.SARDeployer.start(SARDeployer.java:285)
    [java]      at org.jboss.deployment.MainDeployer.start(MainDeployer.java:989)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:790)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:753)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:737)
    [java]      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [java]      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)

    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
    [java]      at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperatio
nInterceptor.java:127)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
    [java]      at $Proxy5.deploy(Unknown Source)
    [java]      at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:453)
    [java]      at org.jboss.system.server.ServerImpl.org$jboss$system$server$ServerImpl$start$aop(S
erverImpl.java:330)
    [java]      at org.jboss.system.server.ServerImpl$start_N8025343665958530775.invokeNext(ServerIm
pl$start_N8025343665958530775.java)
    [java]      at com.wxxr.common.aop.bootrap.JBossServerStartupInterceptor.invoke(JBossServerStart
upInterceptor.java:36)
    [java]      at org.jboss.system.server.ServerImpl$start_N8025343665958530775.invokeNext(ServerIm
pl$start_N8025343665958530775.java)
    [java]      at org.jboss.system.server.ServerImpl.start(ServerImpl.java)
    [java]      at org.jboss.Main.boot(Main.java:187)
    [java]      at org.jboss.Main$1.run(Main.java:438)
    [java]      at java.lang.Thread.run(Thread.java:595)
    [java] Caused by: java.lang.IllegalStateException: Could not find valid implementation for: 2.0
    [java]      at org.apache.xbean.spring.context.impl.XBeanHelper.createBeanDefinitionReader(XBean
Helper.java:48)
    [java]      at org.apache.xbean.spring.context.ClassPathXmlApplicationContext.loadBeanDefinition
s(ClassPathXmlApplicationContext.java:170)
    [java]      at org.springframework.context.support.AbstractRefreshableApplicationContext.refresh
BeanFactory(AbstractRefreshableApplicationContext.java:89)
    [java]      at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractAp
plicationContext.java:268)
    [java]      at org.apache.xbean.spring.context.ClassPathXmlApplicationContext.<init>(ClassPathXm
lApplicationContext.java:161)
    [java]      at org.apache.xbean.spring.context.ClassPathXmlApplicationContext.<init>(ClassPathXm
lApplicationContext.java:51)
    [java]      at org.apache.activemq.xbean.XBeanBrokerFactory.createBroker(XBeanBrokerFactory.java
:41)
    [java]      at org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:57)
    [java]      at org.apache.activemq.ra.ActiveMQResourceAdapter.start(ActiveMQResourceAdapter.java
:80)
    [java]      ... 92 more
    [java] Caused by: java.lang.reflect.InvocationTargetException
    [java]      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    [java]      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorIm
pl.java:39)
    [java]      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAc
cessorImpl.java:27)
    [java]      at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
    [java]      at org.apache.xbean.spring.context.impl.XBeanHelper.createBeanDefinitionReader(XBean
Helper.java:46)
    [java]      ... 100 more
    [java] Caused by: java.lang.NoSuchMethodError: org.springframework.beans.factory.xml.XmlBeanDefi
nitionReader.setValidationMode(I)V
    [java]      at org.apache.xbean.spring.context.v2.XBeanXmlBeanDefinitionReader.<init>(XBeanXmlBe
anDefinitionReader.java:58)
    [java]      ... 105 more

解决办法：
spring 的jar包有重复，删除spring-1.4.jar，保留spring-2.0.jar


异常2：

    [java] 01:02:27,663 INFO  [XBeanXmlBeanDefinitionReader] Loading XML bean definitions from class
 path resource [broker-config.xml]
    [java] 01:02:27,927 WARN  [ServiceController] Problem starting service jboss.jca:service=RARDepl
oyment,name='activemq-rar-4.2-incubator-SNAPSHOT-20070121.082022-22.rar'
    [java] javax.resource.spi.ResourceAdapterInternalException: Failed to startup an embedded broker
: xbean:broker-config.xml, due to: org.springframework.beans.factory.BeanDefinitionStoreException: U
nrecognized xbean element mapping: beans in namespace http://activemq.org/config/1.0
    [java]      at org.apache.activemq.ra.ActiveMQResourceAdapter.start(ActiveMQResourceAdapter.java
:83)
    [java]      at org.jboss.resource.deployment.RARDeployment.startService(RARDeployment.java:107)
    [java]      at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:
274)
    [java]      at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.j
ava:230)
    [java]      at org.jboss.system.ServiceDynamicMBeanSupport.invoke(ServiceDynamicMBeanSupport.jav
a:110)
    [java]      at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:150)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:943
)
    [java]      at $Proxy0.start(Unknown Source)
    [java]      at org.jboss.system.ServiceController.start(ServiceController.java:428)
    [java]      at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
    [java]      at $Proxy33.start(Unknown Source)
    [java]      at org.jboss.deployment.SimpleSubDeployerSupport.startService(SimpleSubDeployerSuppo
rt.java:330)
    [java]      at org.jboss.deployment.SimpleSubDeployerSupport.start(SimpleSubDeployerSupport.java
:112)
    [java]      at org.jboss.deployment.MainDeployer.start(MainDeployer.java:989)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:790)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:753)
    [java]      at sun.reflect.GeneratedMethodAccessor40.invoke(Unknown Source)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)

    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
    [java]      at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperatio
nInterceptor.java:127)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
    [java]      at $Proxy9.deploy(Unknown Source)
    [java]      at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.jav
a:319)
    [java]      at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:
507)
    [java]      at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(Abstr
actDeploymentScanner.java:192)
    [java]      at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeplo
ymentScanner.java:265)
    [java]      at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:
274)
    [java]      at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.j
ava:230)
    [java]      at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:943
)
    [java]      at $Proxy0.start(Unknown Source)
    [java]      at org.jboss.system.ServiceController.start(ServiceController.java:428)
    [java]      at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
    [java]      at $Proxy4.start(Unknown Source)
    [java]      at org.jboss.deployment.SARDeployer.start(SARDeployer.java:285)
    [java]      at org.jboss.deployment.MainDeployer.start(MainDeployer.java:989)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:790)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:753)
    [java]      at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:737)
    [java]      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [java]      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    [java]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java
:25)
    [java]      at java.lang.reflect.Method.invoke(Method.java:585)
    [java]      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)

    [java]      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
    [java]      at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)

    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
    [java]      at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperatio
nInterceptor.java:127)
    [java]      at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
    [java]      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
    [java]      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
    [java]      at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
    [java]      at $Proxy5.deploy(Unknown Source)
    [java]      at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:453)
    [java]      at org.jboss.system.server.ServerImpl.org$jboss$system$server$ServerImpl$start$aop(S
erverImpl.java:330)
    [java]      at org.jboss.system.server.ServerImpl$start_N8025343665958530775.invokeNext(ServerIm
pl$start_N8025343665958530775.java)
    [java]      at com.wxxr.common.aop.bootrap.JBossServerStartupInterceptor.invoke(JBossServerStart
upInterceptor.java:36)
    [java]      at org.jboss.system.server.ServerImpl$start_N8025343665958530775.invokeNext(ServerIm
pl$start_N8025343665958530775.java)
    [java]      at org.jboss.system.server.ServerImpl.start(ServerImpl.java)
    [java]      at org.jboss.Main.boot(Main.java:187)
    [java]      at org.jboss.Main$1.run(Main.java:438)
    [java]      at java.lang.Thread.run(Thread.java:595)
    [java] Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Unrecognized x
bean element mapping: beans in namespace http://activemq.org/config/1.0
    [java]      at org.apache.xbean.spring.context.v2c.XBeanNamespaceHandler.parseBeanFromExtensionE
lement(XBeanNamespaceHandler.java:258)
    [java]      at org.apache.xbean.spring.context.v2c.XBeanNamespaceHandler.parse(XBeanNamespaceHan
dler.java:152)
    [java]      at org.apache.xbean.spring.context.v2.XBeanNamespaceHandler.parse(XBeanNamespaceHand
ler.java:49)
    [java]      at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomEle
ment(BeanDefinitionParserDelegate.java:1147)
    [java]      at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomEle
ment(BeanDefinitionParserDelegate.java:1137)
    [java]      at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBe
anDefinitions(DefaultBeanDefinitionDocumentReader.java:150)
    [java]      at org.apache.xbean.spring.context.v2.XBeanBeanDefinitionDocumentReader.parseBeanDef
initions(XBeanBeanDefinitionDocumentReader.java:63)
    [java]      at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registe
rBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:89)
    [java]      at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinit
ions(XmlBeanDefinitionReader.java:499)
    [java]      at org.apache.xbean.spring.context.v2.XBeanXmlBeanDefinitionReader.registerBeanDefin
itions(XBeanXmlBeanDefinitionReader.java:79)
    [java]      at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitio
ns(XmlBeanDefinitionReader.java:407)
    [java]      at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions
(XmlBeanDefinitionReader.java:357)
    [java]      at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions
(XmlBeanDefinitionReader.java:334)
    [java]      at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDe
finitions(AbstractBeanDefinitionReader.java:126)
    [java]      at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDe
finitions(AbstractBeanDefinitionReader.java:142)
    [java]      at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDe
finitions(AbstractBeanDefinitionReader.java:168)
    [java]      at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinit
ions(AbstractXmlApplicationContext.java:113)
    [java]      at org.apache.xbean.spring.context.ClassPathXmlApplicationContext.loadBeanDefinition
s(ClassPathXmlApplicationContext.java:180)
    [java]      at org.springframework.context.support.AbstractRefreshableApplicationContext.refresh
BeanFactory(AbstractRefreshableApplicationContext.java:94)
    [java]      at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractAp
plicationContext.java:294)
    [java]      at org.apache.xbean.spring.context.ClassPathXmlApplicationContext.<init>(ClassPathXm
lApplicationContext.java:161)
    [java]      at org.apache.xbean.spring.context.ClassPathXmlApplicationContext.<init>(ClassPathXm
lApplicationContext.java:51)
    [java]      at org.apache.activemq.xbean.XBeanBrokerFactory.createBroker(XBeanBrokerFactory.java
:41)
    [java]      at org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:57)
    [java]      at org.apache.activemq.ra.ActiveMQResourceAdapter.start(ActiveMQResourceAdapter.java
:80)
    [java]      ... 92 more
    [java] 01:02:28,345 INFO  [RARDeployment] Required license terms exist, view META-INF/ra.xml in
.../deploy/jboss-local-jdbc.rar

解决办法 ：
<beans  xmlns="http://activemq.org/config/1.0">

  <broker brokerName="sender-ws2" useJmx="true">
==》改成：
<beans>
 <broker brokerName="sender-ws2" useJmx="true"  xmlns="http://activemq.org/config/1.0">
参考
http://www.mail-archive.com/activemq-users@geronimo.apache.org/msg06853.html

posted @ 2007-02-06 01:10 java光环 阅读(1233) | 评论 (0) | 编辑 收藏

eclipse 中加入linked resource

posted @ 2006-08-14 10:39 java光环 阅读(1340) | 评论 (0) | 编辑 收藏

轻松的五一

posted @ 2006-05-08 10:12 java光环 阅读(653) | 评论 (0) | 编辑 收藏

一生中最应珍惜的十种人

posted @ 2006-02-28 14:41 java光环 阅读(361) | 评论 (0) | 编辑 收藏

用maven 启动 jboss 时出现异常：[java] FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=JVMTI_ERROR_INTERNAL(113)

posted @ 2006-02-16 15:19 java光环 阅读(8015) | 评论 (2) | 编辑 收藏

Oracle Blob/Clob 字段写入时产生转型异常Cast Exception

public void testAdd() throws Exception {
        byte[] buffer = new byte[1]; 
        buffer[0] = 1;
        Session s = null;
        try { 
            s = sf.openSession(); 
            Transaction tx = s.beginTransaction();
            BizUserStatistics us= new BizUserStatistics();
            us.setId(new Long(100));
            us.setStatisticsInfo(Hibernate.createClob(" "));

            s.save(us); 
            s.flush(); 
            s.refresh(us, LockMode.UPGRADE); 
//            CLOB clob = (CLOB)us.getStatisticsInfo(); 
            SerializableClob lob=(SerializableClob)us.getStatisticsInfo();
            CLOB lob2 = (CLOB)lob.getWrappedClob();     
            Writer out = lob2.getCharacterOutputStream();
            String fileName = "d:/process_log.sql";
            File f = new File(fileName); 
            FileInputStream fin = new FileInputStream(f);
 
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < 1000; i++){
                sb.append("<data>" + i + "</data>");
            }
            out.write(sb.toString());
            out.close();
            
            s.flush(); 
            tx.commit(); 
            } catch (Exception e) {
                e.printStackTrace(); 
            } finally {
                if (s != null)
                try {
                s.close(); 
                } catch (Exception e){}
            }

    }

posted @ 2006-02-14 16:35 java光环 阅读(1231) | 评论 (0) | 编辑 收藏

利用scomp 生成指定package java jar 包命令

posted @ 2006-02-14 16:23 java光环 阅读(1251) | 评论 (0) | 编辑 收藏

jboss service 本地方法调用

posted @ 2005-12-09 15:02 java光环 阅读(428) | 评论 (0) | 编辑 收藏

WARN afterTransactionCompletion() was never called

警告: afterTransactionCompletion() was never called

执行了tx = session.beginTransaction();

但是后来没处理tx

应该用tx.commit() or tx.rollback()

一般查询时容易出现此问题

posted @ 2005-10-08 09:58 java光环 阅读(1953) | 评论 (3) | 编辑 收藏

hibernate ant Hbm2JavaTask Exception of:org.xml.sax.SAXParseException: Attribute "insert" must be declared for element type "discriminator".

<discriminator type="java.lang.String" column="REGION_TYPE"
   length="10" force="false" insert="true"/>

Region.hbm.xml(15)
org.xml.sax.SAXParseException: Attribute "insert" must be declared for element type "discriminator".

        at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
        at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
        at org.apache.xerces.impl.dtd.XMLDTDValidator.addDTDDefaultAttrsAndValidate(Unknown Source)
        at org.apache.xerces.impl.dtd.XMLDTDValidator.handleStartElement(Unknown Source)
        at org.apache.xerces.impl.dtd.XMLDTDValidator.emptyElement(Unknown Source)
        at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
        at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(
Unknown Source)
        at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
        at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
        at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
        at org.jdom.input.SAXBuilder.build(Unknown Source)
        at org.jdom.input.SAXBuilder.build(Unknown Source)
        at org.jdom.input.SAXBuilder.build(Unknown Source)
        at net.sf.hibernate.tool.hbm2java.CodeGenerator.main(CodeGenerator.java:100)
        at net.sf.hibernate.tool.hbm2java.Hbm2JavaTask.processFile(Hbm2JavaTask.java:149)
        at net.sf.hibernate.tool.hbm2java.Hbm2JavaTask.execute(Hbm2JavaTask.java:97)
        at org.apache.tools.ant.Task.perform(Task.java:341)
        at org.apache.commons.jelly.tags.ant.AntTag.doTag(AntTag.java:185)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:233)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:89)
        at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
        at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag
.java:110)
        at com.werken.werkz.Goal.fire(Goal.java:639)
        at com.werken.werkz.Goal.attain(Goal.java:575)
        at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
        at com.werken.werkz.Goal.attain(Goal.java:573)
        at org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:671)
        at org.apache.maven.MavenSession.attainGoals(MavenSession.java:263)
        at org.apache.maven.cli.App.doMain(App.java:488)
        at org.apache.maven.cli.App.main(App.java:1239)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at com.werken.forehead.Forehead.run(Forehead.java:551)
        at com.werken.forehead.Forehead.main(Forehead.java:581)

build:
----------------------------------
----------------------------------
solution : 升级hiberate verion 2.1.8
----------------------------------
----------------------------------
改maven ：project.xml
<dependency>
   <groupId>hibernate</groupId>
   <artifactId>hibernate</artifactId>
   <version>2.1.8</version>
   <properties>
    <ejb.manifest.classpath>true</ejb.manifest.classpath>
   </properties>
  </dependency>

这样写，也是没有问题的
<discriminator type="java.lang.String" column="REGION_TYPE" length="10"/>

posted @ 2005-08-19 13:52 java光环 阅读(4247) | 评论 (1) | 编辑 收藏

jasperreport 0.6.8 生成 excel 报表，目前还不能支持图片

public class OfficeDrawing
{
    public static void main(String[] args)
        throws IOException
    {
// Create the workbook and sheets.
        HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet5 = wb.createSheet("fifth sheet");
drawSheet5( sheet5, wb );

// Write the file out.
        FileOutputStream fileOut = new FileOutputStream("workbook.xls");
        wb.write(fileOut);
        fileOut.close();
    }

private static void drawSheet5( HSSFSheet sheet5, HSSFWorkbook wb ) throws IOException
    {

        // Create the drawing patriarch.  This is the top level container for
        // all shapes. This will clear out any existing shapes for that sheet.
        HSSFPatriarch patriarch = sheet5.createDrawingPatriarch();

        HSSFClientAnchor anchor;
        anchor = new HSSFClientAnchor(0,0,0,255,(short)2,2,(short)4,7);
        anchor.setAnchorType( 2 );
        patriarch.createPicture(anchor, loadPicture( "src/resources/logos/logoKarmokar4.png", wb ));

        anchor = new HSSFClientAnchor(0,0,0,255,(short)4,2,(short)5,7);
        anchor.setAnchorType( 2 );
        patriarch.createPicture(anchor, loadPicture( "src/resources/logos/logoKarmokar4edited.png", wb ));

        anchor = new HSSFClientAnchor(0,0,1023,255,(short)6,2,(short)8,7);
        anchor.setAnchorType( 2 );
        HSSFPicture picture = patriarch.createPicture(anchor, loadPicture( "src/resources/logos/logoKarmokar4s.png", wb ));
        picture.setLineStyle( picture.LINESTYLE_DASHDOTGEL );

    }

private static int loadPicture( String path, HSSFWorkbook wb ) throws IOException
    {
        int pictureIndex;
        FileInputStream fis = null;
        ByteArrayOutputStream bos = null;
        try
        {
            fis = new FileInputStream( path);
            bos = new ByteArrayOutputStream( );
            int c;
            while ( (c = fis.read()) != -1)
                bos.write( c );
            pictureIndex = wb.addPicture( bos.toByteArray(), HSSFWorkbook.PICTURE_TYPE_PNG );
        }
        finally
        {
            if (fis != null)
                fis.close();
            if (bos != null)
                bos.close();
        }
        return pictureIndex;
    }

}

posted @ 2005-07-13 14:28 java光环 阅读(1243) | 评论 (0) | 编辑 收藏

jboss 远程方法调用RMIAdaptor 数组参数的梆定

posted @ 2005-06-14 13:41 java光环 阅读(1221) | 评论 (0) | 编辑 收藏

关于iReport中生成报表中文显示问题

posted @ 2005-06-14 13:30 java光环 阅读(1511) | 评论 (0) | 编辑 收藏

hiberante persistence

create table miners (
   id BIGINT NOT NULL AUTO_INCREMENT,
   first_name VARCHAR(255),
   last_name VARCHAR(255),
   primary key (id)
)

package deadwood;
/**//**
 * @hibernate.class table="miners"
 */
public class Miner {
    private Long id;
    private String firstName;
    private String lastName;
    /**//**
     * @hibernate.id generator-class="native"
     */
    public Long getId() { return id; }
    public void setId(Long id) { this.id = id; }

    /**//**
     * @hibernate.property column="first_name"
     */
    public String getFirstName() { return firstName; }
    public void setFirstName(String firstName) { this.firstName = firstName; }

    /**//**
     * @hibernate.property column="last_name"
     */
    public String getLastName() { return lastName; }
    public void setLastName(String lastName) { this.lastName = lastName; }
}

Associations

 the Miner class we looked at was single table oriented, mapping to a single miners table. ORM solutions support ways to map associated tables to in memory objects ,
 

• Many to One/One to one - belongs_to/has_one
• One to Many (set) - has_many
• Many to Many (set) - has_and_belongs_to_many
• Single Table Inheritance
• Components (mapping > 1 object per table)

 As a comparative example, lets look at the many to one relationship. We are going to expand our Deadwood example from part I. We add to the Miner a many to one association with a GoldClaim object. This means there is a foreign key, gold_claim_id in the miners table, which links it to a row in the gold_claims table.

(Java)
public class Miner {
   // Other fields/methods omitted

    private GoldClaim goldClaim;
    /**//**
     * @hibernate.many-to-one column="gold_claim_id"
     *         cascade="save"
     */
    public GoldClaim getGoldClaim() { return goldClaim; }
    public void setGoldClaim(GoldClaim goldClaim) {
        this.goldClaim = goldClaim;
    }
}

 Transitive Persistence  
Its important for an ORM solution to provide a way to detect and cascade changes from in memory objects to the database, without the need to manually save() each one. Hibernate features a flexible and powerful version of this via declarative cascading persistence. 

Deleting Hibernate offers a number of different cascading behaviors for all associations types, giving it a high degree of flexibility. For example, setting cascade="all" will make GoldClaim save, update and delete along with its parent Miner, like so...

Miner miner = new Miner();
miner.setGoldClaim(new GoldClaim());
session.save(miner); // Saves Miner and GoldClaim objects.
session.delete(miner); // Deletes both of them.

Query Languages

 Hibernate has its own object oriented query language (Hibernate Query Language - HQL), which is deliberately very similar to SQL. How it differs is that it lets developers express their queries in terms of objects and fields instead of tables and columns. Hibernate translates the query into SQL optimized for your particular database. Obviously, inventing a new query language is very substantial task, but the expressiveness and power of it is one of Hibernate's selling points. 

Querying for Objects with HQL 
when you have to start navigating across objects with SQL, HQL can be very convenient alternative. Let's take a look at our sample queries for HQL.

// Find first Miner by name
Query q = session.createQuery("from Miner m where m.firstName = :name");
q.setParameter("name", "Elma");
Miner m = (Miner) q.setMaxResults(1).uniqueResult();

// Finds up to 10 miners older than 30, ordered by age.
Integer age = new Integer(30);
Query q = session.createQuery(
    "from Miner m where m.age > :age order by age asc");
List miners = q.setParameter("age", age).setMaxResults(10).list();

// Similar to join query above, but no need to manually join
Query q = session.createQuery(
   "from Miner m where m.goldClaim.squareArea = :area");
List minersWithSqA = q.setParameter("area", new Integer(1000)).list();

 Having covered some of the basics of fetching objects, let's turn your attention to how we can make fetching objects fast. The next section covers the means by which we can tune the performance. 

Performance Tuning

 Beyond just mapping objects to tables, robust ORM solutions need to provide ways to tune the performance of the queries. One of the risks of working with ORM's is that you often pull back too much data from the database. This tends to happen because it its very easy to pull back several thousand rows, with multiple SQL queries, with a simple statement like "from Miner". Common ORM strategies for dealing with this include Lazy fetching, outer join fetching and caching. 

What I mean by lazy is that when you fetch an object, the ORM tool doesn't fetch data from other tables, until you request the association. This prevents loading to much unneeded data.  Hibernate allows you to choose which associations are lazy.  This leads us to one of the great fallacies of ORM, that Lazy loading is always good. In reality, lazy loading is only good if you didn't need the data. Otherwise, you are doing with 2-1000+ queries what you could have done with one. This is dreaded N+1 select problem, where to get all the objects require N selects + 1 original selects. This problem gets much worse when you deal with collections..

Outer Joins and Explicit Fetching

Generally, one of the best way to improve performance is to limit the number of trips to the database. Better 1 big query than a few small ones. Hibernate has a number ways its handles the N+1 issue. Associations can be explicitly flagged for outer join fetching (via outer-join="true"), and you can add outer join fetching to HQL statements. For example...

/**//**
* @hibernate.many-to-one column="gold_claim_id"
*           cascade="save-update" outer-join="true"
*/
public GoldClaim getGoldClaim() { return goldClaim;  }

// This does one select and fetches both the Miner and GoldClaim
// and maps them correctly.
Miner m = (Miner) session.load(Miner.class, new Long(1));

// Issues a single select, instead of 1 + N (where N is the # miners)
List list = session.find("from Miner m left join fetch m.goldClaim");

While object caching isn't always going to be helpful or a performance silver bullet, Hibernate has a huge potential advantage here. It provides several levels of caching, including a session (UnitOfWork) level as well as an optional second level cache. You always use the '1st level' cache, as it prevents circular references and multiple trips to the database for the same object. Using a second level cache can allow much of the database state to stay resident in memory. This is especially useful for frequently read and reference data.

posted @ 2005-05-12 18:38 java光环 阅读(564) | 评论 (0) | 编辑 收藏

shark 工作流引擎新特性 handling Deadlines

* Added new functionality of handling Deadlines.
  Shark now has defined client API, and its implementation for handling Activity deadlines.
  This API is supposed to be used by shark client to periodically ask shark to check deadines.
  Shark can be setup to re-evaluate deadlines every time deadline check is performed,
  or to initially calculate deadline times and store it into DB, and when asked to
  check deadlines, deadline limit is retrieved from DB.
  Shark comes with an example XPDL processes contained in deadlineexamples.xpdl file,
  that shows ASYNC and SYNC deadline handling.

  In shark deadline expressions along with all process variables, you can use special variables called:

      1. PROCESS_STARTED_TIME - the time when the process is started

      2. ACTIVITY_ACTIVATED_TIME - the time when process flow comes to activity and
                                   assignments for the activity are created

      3. ACTIVITY_ACCEPTED_TIME - the time when the first assignment for the activity is accepted

      NOTE: If activity is being rejected after its acceptance, or it is not accepted at all,
            the ACTIVITY_ACCEPTED_TIME is set to some maximum value in the future

   IMPORTANT:

      - There shouldn't be process variables (DataField or FormalParameter entities from XPDL)
        that have the same Id as the one of previously listed - The Java type of these variables is java.util.Date.

      - deadline expression result must be java.util.Date

      - if shark is setup to not re-evaluate deadlines, but to initially evaluate
        deadline limit times, ACTIVITY_ACCEPTED_TIME should not be used in expressions
        because it will contain some maximum time in the future.

   When starting Shark CORBA server, it can be configured if it will open a thread for checking Deadlines.

posted @ 2005-04-30 18:23 java光环 阅读(913) | 评论 (0) | 编辑 收藏

shark 工作流引擎新特性MailToolAgent

* New MailToolAgent is included:

   - in Shark.conf file you have some settings for MailToolAgent (in fact for the DefaultMailMessageHandler)

   - when calling this tool agent, AppMode 0 means sending and 1 means receiving mail

   - when calling this tool agent, AppName is the name of MailMessageHandler class to use.
     We have default implementation of this interface called DefaultMailMessageHandler which
     needs 3 String IN parameters (destination address, mail subject and mail content) when sending mails,
     and 1 OUT or INOUT type parameter (message subject) when receiving mails.
     The example of usage for this tool agent is in test-JavaScript.xpdl -> Mail Handling process.

posted @ 2005-04-30 18:19 java光环 阅读(505) | 评论 (0) | 编辑 收藏

shark 工作流引擎新特性 HistoryRelated assigment

* Included new HistoryRelated implementation of Assignment API - great contribution by Rich Robinson.
  You can use it by commenting standard AssignmentManager and uncommenting HistoryRelated assignment
  manager entries in Shark.conf (if you are configuring shark this way), and test it with
  Publish Document proces from test-JavaScript.xpdl.

I've attached the latest HistoryRelatedAssignmentManager class and also an updated
version of test-JavaScript.xpdl.

The class now supports the following extended attributes (the names of which
can be redefined in Shark.conf):

* ReassignToOriginalPerformer
* ReassignToOriginalPerformer
* DoNotAssignToPerformerOfActivity

As mentioned in the comments, one of each extended attribute should be
associated with any single activity definition.  If anybody wishes to
extend/modify this class in any way, one obvious improvment would be to allow
multiple copies of each extended attribute to be assigned to a single 
activity.
I would ideally have liked to do this, but I don't need such functionality at
the moment, and unfortunately don't have any more time to spend on it.

In order to get the class working, the following properties need to be 
specified
in Shark.conf:

#
# HistoryRelated assigment manager
#
AssignmentManagerClassName=org.enhydra.shark.assignment.HistoryRelatedAssignmentManager
HistoryRelatedAssignmentManager.username=admin
HistoryRelatedAssignmentManager.password=enhydra
HistoryRelatedAssignmentManager.extAttrReassignToOriginalPerformer=ReassignToOriginalPerformer
HistoryRelatedAssignmentManager.extAttrAssignToPerformerOfActivity=AssignToPerformerOfActivity
HistoryRelatedAssignmentManager.extAttrDoNotAssignToPerformerOfActivity=DoNotAssignToPerformerOfActivity

The XPDL example is a "publish document" process that describes the workflow
that may occur when publishing a web-based document.  Note that in the 
following,
a question mark represents either "1" or "2" depending on which moderator we 
are
referring to:

* Initially, an author creates a document and submits it to two moderators.  
The
"DoNotAssignToPerformerOfActivity" ext attrib is used for each
moderate_document_? activity to ensure that two different moderators moderate
the document and that the same moderator cannot moderate it twice.  

* Each moderator moderates the document and says whether or not it is ok by
setting the values of the moderate_?_ok WRD.  If OK, the moderator then has to
submit the document.  Note that the AssignToPerformerOfActivity ext attrib is
used to ensure that the moderator who moderated the document is assigned the
appropriate submit_document_? activity.

* If either moderator rejects the document, then the author has to update it.
Again, we use the AssignToPerformerOfActivity ext attrib to ensure that the
author who originally created the document has to update it.

* When updated, the author has to re-submit the document using the same
submit_document activity.  We use the ReassignToOriginalPerformer ext attrib 
to
ensure that the author who resubmits the document is the same author that
originally submitted it.

* Finally, when both the moderators are happy with the document, a publisher
reviews it (if he rejects it, we head back to "update document" - in exactly
the same way as if a moderator rejects it).  When the publisher is happy with
the document, he publishes it.  We use the AssignToPerformerOfActivity ext
attrib to ensure that the publisher who publishes the document is the same
publisher that reviewed it.

That's it...  I've tested both the class and the XPDL to some extent, but both
could do with some more testing if anybody would like to do it.

Let me know if you have any questions.

posted @ 2005-04-30 14:16 java光环 阅读(537) | 评论 (0) | 编辑 收藏

Integrating workflow engines with other system modules

Hi all,

This is probably a newbie question so please be tolerant :-)

I am involved in the development of a system that has a business process management component. The system is based on Spring, Hibernate and Web Work 2. The question is, out of all those available BPM engines, which ones can easily be integrated into other infrastructures? My first impression is that BPM engines designed to be the infrastructure itself, so that functions such as data access, business logic and user interface are specified around it. As opposed to using another infrastructure (in our case, Spring + Hibernate + Web Work) where the BPM engine is merely a component.

--->

I feel that the best way to use a Workflow/BPM system is as a database is : something external that you access with some system users.

I think it should be implemented as an aspect

--->

I am currently building a project using Struts, Spring and Hibernate with OSWorkflow. The current development build (2.8) has built-in support for a Spring / Hibernate environment. In this case, performing an action in the workflow can check against a set of pre-conditions, which can refer to logic in the business layer and can then call some functions if the conditions hold, which can also refer to business logic. This is nice because Spring deals with the dependencies for the conditions and functions. The end result is my business logic is protected by the workflow engine, which prevents any action being performed in the wrong stage of the process.

The only downside of OSWorkflow is that you have to call the workflow action by passing the action's id (an int) and a map of all the inputs to the engine. I'm getting around this by writing an abstraction layer that provides nice method signatures (the business facade) for my struts actions (or any other client). These methods will map to an action id, take all the arguments from the signature and wrap them in a map and call the action.

I hope this is helpful.

Adam

http://www.manageability.org/blog/stuff/workflow_in_java/view

posted @ 2005-04-28 18:49 java光环 阅读(528) | 评论 (0) | 编辑 收藏

工作流引擎Shark配置

 如果在Shark中未定义程序映射，Shark将调用默认的ToolAgent，在Shark.conf中可定义；

RuntimeApplicationToolAgent可执行其它外部程序，比如notepad等，此时，传入的application mode如果为0，则Shark会等待应用程序的执行结束；如果不为0，则Shark在应用程序开始后会继续流程的处理；

JavaScriptToolAgent可用于执行JavaScript，application mode为0，则系统将搜索名为applicationName的文件，执行；

posted @ 2005-04-22 11:37 java光环 阅读(869) | 评论 (0) | 编辑 收藏

Spring Hibernate Config: mappingDirectoryLocations

<property name="mappingResources">
<list>
<value>com/almaer/model/Person.hbm.xml</value>
<value>com/almaer/model/Car.hbm.xml</value>
<value>com/almaer/model/Engine.hbm.xml</value>
<value>com/almaer/model/Toy.hbm.xml</value>
</list>
</property>

<property name="mappingDirectoryLocations">
<list>
<value>WEB-INF/mappings</value>
</list>
</property>

posted @ 2005-04-20 13:59 java光环 阅读(1382) | 评论 (0) | 编辑 收藏

关于cascade 与inverse

posted @ 2005-04-15 15:09 java光环 阅读(266) | 评论 (0) | 编辑 收藏