jBPM的基本流程和概念

官方提供的userguide从大的方面阐述了jBPM的基本流程和概念,总结一下其思路：
    一：发布
    1.一切从Configuration开始：Configuration configuration = new Configuration();
    2.然后构建 ProcessEngine：ProcessEngine processEngine = configuration().buildProcessEngine();
    3.有了ProcessEngine,一切就都有了：
        RepositoryService repositoryService = processEngine.getRepositoryService();
        ExecutionService executionService = processEngine.getExecutionService();
        TaskService taskService = processEngine.getTaskService();
        HistoryService historyService = processEngine.getHistoryService();
        ManagementService = processEngine.getManagementService();
    4.发布了：String deploymentId = repositoryService.createDeployment()
                               .addResourceFromClassPath("org/jbpm/Order.jpdl.xml")
                               .deploy();
    5.现在删除它吧：repositoryService.deleteDeployment(deploymentId);
        当然，还有另一个方法：repositoryService.deleteDeploymentCascade(deploymentId);//将删除相关instance和history。

Obtain ProcessEngine from a Configuration:
    ProcessEngine processEngine = new Configuration().buildProcessEngine();
    those code will load this default configuration file jbpm.cfg.xml which is expected in the root of the classpath.
Get ProcessEngine from your own configuration file by Configuration:
    ProcessEngine processEngine = new Configuration().setResource("myconfigurationfile.xml").bulidProcessEngine();
Now you can obtain the following services:
    RepositoryService repositoryService = processEngine.getRepositoryService();
    ExecutionService executionService = processEngine.getExecutionService();
    TaskService taskService = processEngine.getTaskService();
    HistoryService historyService = processEngine.getHistoryService();
    ManagementService managementService = processEngine.getManagementService();
Deploying a process:
    String deploymentId = repositoryService.createDeployment().addResourceFromClassPath("org/jbpm/my.jpdl.xml").deploy();
Deleting a deployment:
    repositoryService.deleteDeployment(deploymentId);
    repositoryService.deleteDeploymentCascade(deploymentId);
 
 
Starting a new process instance

Simplest and most common way:
    ProcessInstance processInstance = executionService.startProcessInstanceByKey("ICL");
Specific process version:
    ProcessInstanc processInstance = executionService.startProcessInstanceById("ICL-1");

With a key:
    ProcessInstance processInstance = executionService.startProcessInstanceByKey("ICL","CL92837");
With variables:
    Map<String,Object> variables = new HashMap<String,Object>();
    variables.put("customer","John Doe");
    variables.put("type","Accident");
    ProcessInstance processInstance = executionService.startProcessInstanceByKey("ICL",variables);
startProcessInstanceByKey和startProcessInstanceById的区别：
前者会根据key寻找最近的deployment版本，后者是直接寻找到特定版本。
 
 
jbpm 顺序执行一个流程
 
  ProcessInstance processInstance = excutionService.startProcessInstanceByKey("StateSequence");

    Execution executionInA = processInstance.findActiveExecutionIn("a");

    processInstance = executionService.signalExecutionById(executionInA.getId());
    Execution executionInB = processInstance.findActiveExecutionIn("b");

    processInstance = executionService.signalExecutionById(executionInB.getId());
    Execution executionInC = processInstance.findActiveExecutionIn("c");
 
jbpm 带分支的流程
 
ProcessInstance processInstance = executionService.startProcessInstanceByKey("StateChoice");

    String executionId = processInstance.findActiveExecutionIn("wait for response").getId();

    processInstance = executionService.signalExecutionById(executionId,"accept");

    assertTrue(processInstance.isActive("submit document"));
 
jbpm 有关decision
 
Map<String,Object> variables = new HashMap<String,Object>();
    variables.put("content","good");
    ProcessInstance processInstance = executionService.startProcessInstanceByKey("DecisionConditions",variables);
    assertTrue(processInstance.isActive("submit document"));
 
mysql在hibernate中的配置
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          " http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

    <session-factory>
        <property name="connection.username">root</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/jbpmdb</property>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="myeclipse.connection.profile">bbs</property>
        <property name="connection.password">pwd</property>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="show_sql">true</property>
        <mapping resource="com/bbs/hibernate/User.hbm.xml"></mapping>
    </session-factory>
Hibernate之hbm2ddl

<property name="hibernate.hbm2ddl.auto">

</property>

它包含4个属性:

    * create : 会根据你的model类来生成表,但是每次运行都会删除上一次的表,重新生成表,哪怕2次没有任何改变

    * create-drop : 根据model类生成表,但是sessionFactory一关闭,表就自动删除

    * update : 最常用的属性，也根据model类生成表,即使表结构改变了,表中的行仍然存在,不会删除以前的行

    * validate : 只会和数据库中的表进行比较,不会创建新表,但是会插入新值

 

</hibernate-configuration>

 

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