BlogJava-西瓜地儿-随笔分类-jbpm

jbpm的两个错误

西瓜 — Thu, 24 Mar 2011 03:46:00 GMT

1、问题：org.hibernate.exception.ConstraintViolationException: could not delete: [org.jbpm.pvm.internal.model.ExecutionImpl#1]
连接Mysql5时，jBPM4运行到 End结点时的错误，把 hibernate.dialect 改为 org.hibernate.dialect.MySQLInnoDBDialect

2、问题：org.hibernate.HibernateException: instance not of expected entity type: org.jbpm.pvm.internal.type.variable.UnpersistableVariable is not a: org.jbpm.pvm.internal.type.Variable

In case you still got the problem. I also had this error due to the fact the Object I was adding as a variable was not Serializable.

Implementing java.io.Serializable should fix this error.

意思是压入上下文的对象要实现 Serializable接口

3、问题：Caused by: java.lang.ClassNotFoundException: de.odysseus.el.util.SimpleResolver

Requirements

JUEL requires Java 5 or later.

加入juel.jar

-------------------------
I think I get same problem when trying to integrate JBPM4 into my app. And I find out why.
Because you're using Tomcat 6.0... The lib el-api.jar in %tomcat_home%/lib conflicts with juel.jar, which exists in %jbpm4_home%/lib.

juel: You will find the 2 jars define the same api for javax/el/ExressionFactory.

The solution is that you use Tomcat 5.5 instead of Tomcat 6.0. Because tomcat 5.5 uses commons-el.jar (Tomcat5.5/common/lib)

Or you can still use Tomcat 6.0, but you must replace el-api.jar with juel.jar. And don't forget to remove juel.jar from your app lib(A duplicate import, if you don't remove).

Try it!

---------------------------------------------------------
总结：删掉tomcat6的el.jar，加入juel.jar,juel-impl.jar,juel-engine.jar

西瓜 2011-03-24 11:46 发表评论

jbpm4.3流程图插件乱码问题和name输入刷新问题

西瓜 — Thu, 14 Jan 2010 05:40:00 GMT

流程图插件中输入中文保存后会变成乱码。参考网站：http://am-wj.javaeye.com/blog/432188

1.将文件 JbpmLocationPage.java 放入eclipse"plugins"org.jboss.tools.jbpm.common.source_日期.jar的org"jboss"tools"jbpm"preferences目录下

2.将文件JbpmLocationsPage%241.class、JbpmLocationsPage%242.class、JbpmLocationsPage%243.class、JbpmLocationsPage%244.class、JbpmLocationsPage.class放入eclipse"plugins"org.jboss.tools.jbpm.common_日期.jar的org"jboss"tools"jbpm"preferences目录下

3.NewJpdl4FileWizardPage.java放入org.jboss.tools.flow.jpdl4.source_1.2.0.v日期.jar中org"jboss"tools"flow"jpdl4"wizard

4.NewJpdl4FileWizardPage.class放入org.jboss.tools.flow.jpdl4_1.2.0.v日期.jar中org"jboss"tools"flow"jpdl4"wizard

5.JpdlSerializer.java、ProcessSerializer.java 放入org.jboss.tools.flow.jpdl4.source_1.2.0.v日期.jar中org"jboss"tools"flow"jpdl4"io

6.JpdlSerializer.class、ProcessSerializer.class 放入org.jboss.tools.flow.jpdl4_1.2.0.v日期.jar中org"jboss"tools"flow"jpdl4"io

在属性name中输入字母时总是要返回第一个位置很是烦人。

解决：主要是在输入完字母后，插件会刷新一下输入框。把这个去掉就好了。

将NameSection.java放入org.jboss.tools.flow.jpdl4.source_1.2.0.v日期.jar中org"jboss"tools"flow"jpdl4"properties"

将NameSection.class、NameSection%241.class、NameSection%242.class放入org.jboss.tools.flow.jpdl4_1.2.0.v日期.jar中

注：自己试了一下，问题没有解决。我用的是4.3版本的jbpm，如果谁解决了请留言。

西瓜 2010-01-14 13:40 发表评论

jbpm4.3遇到的错误

西瓜 — Tue, 12 Jan 2010 14:32:00 GMT

1：jbpm4.3包冲突
错误如下：

严重: Servlet.service() for servlet jsp threw exception
java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/index_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type javax/el/ExpressionFactory used in the signature
    at org.apache.jsp.index_jsp._jspInit(index_jsp.java:26)
    at org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52)
    at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:159)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Unknown Source)

这里面需要删除juel.jar ,juel-engine.jar,juel-impl.jar 三个 jar文件

————————————————————————————————————————————————

但是在其他项目应用里面或许还需要这三个包，就只能把tomcat下面的el-api.jar删掉了
2：出现的错误如下：

严重: Servlet.service() for servlet LeaveServlet threw exception
java.lang.ClassNotFoundException: de.odysseus.el.util.SimpleResolver
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1360)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1206)
    at java.lang.ClassLoader.loadClassInternal(Unknown Source)
    at org.jbpm.pvm.internal.script.JuelScriptEngineFactory.getScriptEngine(JuelScriptEngineFactory.java:185)
    at javax.script.ScriptEngineManager.getEngineByName(Unknown Source)
    at org.jbpm.pvm.internal.script.ScriptManager.evaluate(ScriptManager.java:111)
    at org.jbpm.pvm.internal.script.ScriptManager.evaluateExpression(ScriptManager.java:90)
    at org.jbpm.pvm.internal.model.ExecutionImpl.resolveAssignmentExpression(ExecutionImpl.java:772)
    at org.jbpm.pvm.internal.model.ExecutionImpl.initializeAssignments(ExecutionImpl.java:726)
    at org.jbpm.jpdl.internal.activity.TaskActivity.execute(TaskActivity.java:95)
    at org.jbpm.jpdl.internal.activity.TaskActivity.execute(TaskActivity.java:58)
    at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(ExecuteActivity.java:60)
    at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java:656)
    at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java:616)
    at org.jbpm.pvm.internal.model.ExecutionImpl.start(ExecutionImpl.java:217)
    at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java:65)
    at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java:38)
    at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42)
    at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:54)
    at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.executeInNewEnvironment(EnvironmentInterceptor.java:53)
    at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:40)
    at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55)
    at org.jbpm.pvm.internal.svc.SkipInterceptor.execute(SkipInterceptor.java:43)
    at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.startProcessInstanceByKey(ExecutionServiceImpl.java:66)
    at cn.yu.qingjiaServlet.LeaveServlet.leave(LeaveServlet.java:151)
    at cn.yu.qingjiaServlet.LeaveServlet.process(LeaveServlet.java:80)
    at cn.yu.qingjiaServlet.LeaveServlet.doGet(LeaveServlet.java:60)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at cn.yu.qingjiaServlet.SetCharaterEncodingFilter.doFilter(SetCharaterEncodingFilter.java:26)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Unknown Source)

3：当删除掉el-api.jar的时候出现的错误如下：

java.lang.NoClassDefFoundError: javax/el/ExpressionFactory

解决jbpm4.3当中el-api.jar和三个包冲突的过程中，删除el-api.jar是出现的错误，把名为javaee.jar包（在myeclipse下有这个包）放到tomcat/lib里面就可以了

西瓜 2010-01-12 22:32 发表评论

生成基于Oracle的jBPM数据库脚本

西瓜 — Fri, 01 Jan 2010 14:39:00 GMT

1. 下载最新版本的 JBoss jBPM Starters kit。解压这个文件，假设解压目录为 "${jbpm.starters.kit}"，它的下面应该有 jbpm， jbpm-bpel，jbpm-db，jbpm-designer，jbpm-server 五个子目录。其中我们要用到的是 jbpm 和 jbpm-db两个目录。

2. 导航到 jbpm-db 子目录。在该目录下可以找到 build.properties 文件。这个文件需要作一定修改才能使用。找到下面的这段代码：

     jbpm.3.location=C:/jbpm-X.X
     upgrade.hibernate.properties=hsqldb/hibernate.properties
     upgrade.libdir=hsqldb/lib
     upgrade.old.schema.script=hsqldb/upgrade.scripts/hsqldb.create.jbpm.3.0.2.sql

注意第一行，将 “C:/jbpm-x.x” 改成 "${jbpm.starters.kit}/jbpm"。

3. 导航到 jbpm 子目录。在 jbpm"src"config.files 路径下可以找到 hibernate.cfg.xml 文件。这个文件需要修改和数据库连接相关的部分。找到下面这行代码：

<property name="hibernate.dialect">org.hibernate.dialect.HSQLDialect>
<property name="hibernate.connection.driver_class">org.hsqldb.jdbcDriver>
<property name="hibernate.connection.url">jdbc:hsqldb:mem:.;sql.enforce_strict_size=true>
<property name="hibernate.connection.username">sa>
<property name="hibernate.connection.password">property>

将其修改成 Oracle 的格式：

<property name="hibernate.dialect">org.hibernate.dialect.Oracle9Dialectproperty>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver>
<property name="hibernate.connection.url">jdbc:oracle:thin@localhost:1521:fred>
<property name="hibernate.connection.username">FiberSchedulerJBPM>
<property name="hibernate.connection.password">FiberSchedulerJBPM>

导航到子目录 jbpm 下的路径 jbpm-db"oracle"lib，下载最新的 Oracle jdbc驱动程序（我使用的是 class14.jar），把它放在该路径下。
其中 "localhost" 换成你自己的数据库所在的机器名（或者ip地址），"fred" 换成你自己的Oracle数据库的 SID 名字，使用你自己的 Oracle 数据库用户名和密码来替换 "FiberSchedulerJBPM" 。
4. 导航到 jbpm-db 子目录，在 jbpm-db"oracle 路径下找到文件 hibernate.properties。找到下面这段代码：

hibernate.connection.driver_class=oracle.jdbc.driver.OracleDriver
hibernate.connection.url=jdbc:oracle:thin@HOST:PORT:SID
hibernate.connection.username=USER
hibernate.connection.password=PASSWORD

根据你的数据库配置修改，我的修改如下：

   hibernate.connection.driver_class=oracle.jdbc.driver.OracleDriver
   hibernate.connection.url=jdbc:oracle:thin:@localhost:1521:fred
   hibernate.connection.username=FiberSchedulerJBPM
   hibernate.connection.password=FiberSchedulerJBPM

5. 在目录 jbpm-db下找到ant脚本 build.xml 文件，这个ant 脚本中有这样一段代码是用来生成数据库脚本的：

<target name="db.scripts" description="helper target to generate the database scripts" depends="prepare">
    <delete dir="build/${db}/scripts" />
<mkdir dir="build/${db}/scripts" />
<java classname="org.jbpm.db.JbpmSchema" fork="true">
    <classpath refid="classpath.${db}" />
    <arg value="scripts"/>
    <arg value="${basedir}/build/${db}/scripts"/>
    <arg value="${db}"/>
     <arg value="${jbpm.3.location}/src/config.files/hibernate.cfg.xml"/>
     <arg value="${basedir}/${db}/hibernate.properties"/>
   java>
target>

这段脚本将调用 jBPM的类 org.jbpm.db.JbpmSchema.java 的 main 方法，并给他传5个参数。我们在目录 jbpm 的路线 jbpm"src"java.jbpm"org"jbpm"db 下找到类 JbpmSchema，打开它找到这么一段代码：

public static void main(String[] args) {
   try {
     if ( (args==null) || (args.length==0) ) {
       throw new IllegalArgumentException();
     }

     String cmd = args[0];

     if ("create".equalsIgnoreCase(cmd)) {
       Configuration configuration = createConfiguration(args, 1);
       new JbpmSchema(configuration).createSchema();
     } else if ("drop".equalsIgnoreCase(cmd)) {
       Configuration configuration = createConfiguration(args, 1);
       new JbpmSchema(configuration).dropSchema();
     } else if ("clean".equalsIgnoreCase(cmd)) {
       Configuration configuration = createConfiguration(args, 1);
       new JbpmSchema(configuration).cleanSchema();
     } else if ("scripts".equalsIgnoreCase(cmd)) {
       Configuration configuration = createConfiguration(args, 3);
       new JbpmSchema(configuration).saveSqlScripts(args[1], args[2]);
     }

显然，它只使用了ant脚本传给它的前三个参数。当生成非基于 Oracle 的数据库脚本时，前三个脚本足够了。问题是当生成基于 Oracle 的数据库脚本时，需要使用后两个参数。所以，我们在这段代码的后面加上：

    else if ((args != null) && (args.length > 3) && ("scripts".equalsIgnoreCase(cmd))) {
           new JbpmSchema(JbpmSessionFactory.createConfiguration()).saveSqlScripts(args[1], args[2]);
         }

现在这段代码应该是这个样子：

    public static void main(String[] args) {
      try {
        if ( (args==null) || (args.length==0) ) {
          throw new IllegalArgumentException();
        }

        String cmd = args[0];

        if ("create".equalsIgnoreCase(cmd)) {
         Configuration configuration = createConfiguration(args, 1);
         new JbpmSchema(configuration).createSchema();
       } else if ("drop".equalsIgnoreCase(cmd)) {
         Configuration configuration = createConfiguration(args, 1);
         new JbpmSchema(configuration).dropSchema();
       } else if ("clean".equalsIgnoreCase(cmd)) {
         Configuration configuration = createConfiguration(args, 1);
         new JbpmSchema(configuration).cleanSchema();
       } else if ("scripts".equalsIgnoreCase(cmd)) {
         Configuration configuration = createConfiguration(args, 3);
         new JbpmSchema(configuration).saveSqlScripts(args[1], args[2]);
       } else if ((args != null) && (args.length > 3) && ("scripts".equalsIgnoreCase(cmd))) {
         new JbpmSchema(JbpmSessionFactory.createConfiguration()).saveSqlScripts(args[1], args[2]);
       }

好了，现在一切都完美了。我们接下来执行最后一步，生成我们需要的脚本。

6. 打开命令行提示符窗口并在命令行中导航到子目录 jbpm-db，键入命令 ant oracle.scripts。等命令执行完毕以后，会发现在路径 jbpm-db"build"oracle"scripts 下生成了我们需要的脚本文件：
oracle.clean.sql
oracle.create.sql
oracle.drop.create.sql
oracle.drop.sql

西瓜 2010-01-01 22:39 发表评论