jbpm4学习入门--环境布署

1、下载， jboss.org下的jbpm4，ecplise 3.5, mysql 5

2、安装jbpm4的数据库

     在mysql上建一个学习用的db

    在jbpm4里找到  jbpm-4.0\db\schema.scripts\jbpm.mysql.create.sql

  执行，生成jbpm4需要的数据库表。

3、在ecplise里建一个学习项目(java)，并把 jbpm4\lib里所有的jar以及jbpm.jar加入编译环境

   从 jbpm4的example的目录下的xml得到到本项目的src目录下，

   主要是要用 jbpm.cfg.xml、jbpm.hibernate.cfg.xml

   把jbpm.hibernate.cfg.xml 的数据库连接设置改改如下，使能连上mysql。

    <property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>

<propertyname="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

<propertyname="hibernate.connection.url">jdbc:mysql://localhost:3306/jbpm</property>

<propertyname="hibernate.connection.username">usr</property>

    <property name="hibernate.connection.password">pwd</property>

4、写一个java类 HelloJBPM4

package ex;

import org.apache.commons.logging.Log;

importorg.apache.commons.logging.LogFactory;

importorg.jbpm.api.Configuration;

importorg.jbpm.api.Execution;

importorg.jbpm.api.ExecutionService;

importorg.jbpm.api.HistoryService;

importorg.jbpm.api.IdentityService;

importorg.jbpm.api.ManagementService;

importorg.jbpm.api.ProcessEngine;

importorg.jbpm.api.ProcessInstance;

importorg.jbpm.api.RepositoryService;

import org.jbpm.api.TaskService;

public class HelloJBPM4 {

protectedfinalLoglog=LogFactory.getLog(getClass());

   protected static ProcessEngine processEngine = null;

   protected static RepositoryService repositoryService;

protectedstaticExecutionServiceexecutionService;

protectedstaticManagementServicemanagementService;

protectedstaticTaskServicetaskService;

protectedstaticHistoryServicehistoryService;

protectedstaticIdentityServiceidentityService;

protectedsynchronizedvoidinitialize(){

      if (processEngine==null) {

        String jbpmTestCfgType = System.getProperty("jbpm.test.cfg.type");

log.debug(jbpmTestCfgType);

        Configuration configuration = new Configuration(jbpmTestCfgType);

        String jbpmTestCfgResource = System.getProperty("jbpm.test.cfg.resource");

log.debug("jbpmTestCfgResource-->"+jbpmTestCfgResource);

if(jbpmTestCfgResource!=null){

configuration.setResource(jbpmTestCfgResource);

        }

        processEngine = configuration.buildProcessEngine();        log.debug("using ProcessEngine "+System.identityHashCode(processEngine));

        repositoryService = processEngine.get(RepositoryService.class);

executionService=processEngine.getExecutionService();

historyService=processEngine.getHistoryService();

managementService=processEngine.getManagementService();

taskService=processEngine.getTaskService();

identityService=processEngine.getIdentityService();

}

}

privatevoiddoJob(){

initialize();

StringdeploymentId;

deploymentId=repositoryService.createDeployment()

.addResourceFromClasspath("ex/HelloJBPM4.jpdl.xml")

.deploy();

ProcessInstanceprocessInstance=executionService.startProcessInstanceByKey("Custom");

ExecutionexecutionInPrintDots=processInstance.findActiveExecutionIn("printdots");

StringexecutionId=executionInPrintDots.getId();

executionService.signalExecutionById(executionId);

repositoryService.deleteDeploymentCascade(deploymentId);

}

publicstaticvoidmain(Stringarg[]){

HelloJBPM4ex=newHelloJBPM4();

ex.doJob();

}

}

代码是从JbpmTestCase.java、org.jbpm.examples.custom中复制过来的

略改了一改，就是一个jbpm4的helloworld了。

注意：org.jbpm.examples.custom下的xml改名为HelloJBPM4.jpdl.xml

     类路径也改为ex

5、执行这个类（java application）

成功的话，在ecplise的console里打印一个美女的点图。

HelloJBPM4.jpdl.xml 里调用了PrintDots.java

这个也是从org.jbpm.examples.custom复制过来的

HelloJBPM4.jpdl.xml

<?xml version="1.0" encoding="UTF-8"?>

<process name="Custom" xmlns="http://jbpm.org/4.0/jpdl">

  <start g="20,20,48,48">

<transitionto="printdots"/>

  </start>

  <custom name="print dots"

class="ex.PrintDots"

g="96,16,100,52">

<transitionto="end"/>

</custom>

  <end name="end" g="231,19,80,40"/>

</process>

6、总结

  用ecplise画工作流图，生成jpdl.xml

  自己写个java类把jpdl.xml导入数据库。

  deploymentId = repositoryService.createDeployment()

.addResourceFromClasspath("ex/HelloJBPM4.jpdl.xml")

.deploy();

 

  下面代码把流程从数据库中取出，并执行

  ProcessInstance processInstance = executionService.startProcessInstanceByKey("Custom");

ExecutionexecutionInPrintDots=processInstance.findActiveExecutionIn("printdots");

StringexecutionId=executionInPrintDots.getId();

      executionService.signalExecutionById(executionId);