JBPM知识点-----ProcessState
用来定义子流程，当主流程遇到ProcessState就会停滞并生成子流程运行，子流程运行完毕重新回到主流程运行。主子流程的部署有点特殊（耗 费了我3个小时才搞定，我开始认为只要在processdefinition.xml中定义好2个流程的关系，然后分别发布就好了，但是不行，一定要程序 设置好两者的关系再发布）
主流程xml：
<?xml version="1.0" encoding="UTF-8"?>
<process-definition xmlns="" name="yytest">
<start-state name='yyteststart' >
<transition name='done' to="initial_subyytest" />
</start-state>
<process-state name="initial_subyytest">
<sub-process name="subyytest" />
<!-- variable name="a" access="read,write" mapped-name="aa" /-->
<!-- variable name="b" access="read" mapped-name="bb" /-->
<transition name='done' to="yytestend" />
</process-state>
<end-state name="yytestend" />
</process-definition>
--------------------------------------------------
子流程xml:
<?xml version="1.0" encoding="UTF-8"?>
<process-definition
xmlns="" name="subyytest">
<start-state name="subyyteststart">
<transition name="" to="subyyteststate1"></transition>
</start-state>
<state name="subyyteststate1">
<transition name="" to="subyytestend"></transition>
</state>
<end-state name="subyytestend"></end-state>
</process-definition>
-----------------------------------------------------
部署以及过程生成：
private static void Deploying_processstate(){
JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
try {
InputStream is = new FileInputStream("processes/yytest/processdefinition.xml");
processDefinition = ProcessDefinition.parseXmlInputStream(is);
InputStream subis = new FileInputStream("processes/subyytest/processdefinition.xml");
ProcessDefinition subprocessDefinition = ProcessDefinition.parseXmlInputStream(subis);
//建立关联关系
ProcessState processState = (ProcessState) processDefinition.getNode("initial_subyytest");
processState.setSubProcessDefinition(subprocessDefinition);
//一定要先部署子流程，不然hibernate会报错。
jbpmContext.deployProcessDefinition(subprocessDefinition);
jbpmContext.deployProcessDefinition(processDefinition);
} catch(FileNotFoundException e){
e.printStackTrace();
}finally {
jbpmContext.close();
}
}
private static void Starting_process(){
JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
try {
String processName="yytest";
processInstance =jbpmContext.newProcessInstance(processName);//只生成主流程就好了
}finally {
jbpmContext.close();
}
}
---------------------------------------------------
private static void run(){
JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
try {
long processInstanceId =1;
processInstance = jbpmContext.loadProcessInstance(processInstanceId);
Token token = processInstance.getRootToken();
System.out.println(token.getNode());
token.signal();
ProcessInstance subprocessInstance=token.getSubProcessInstance();
Token subtoken = subprocessInstance.getRootToken();
System.out.println(token.getNode());
System.out.println(subtoken.getNode());
subtoken.signal();
System.out.println(subtoken.getNode());
System.out.println(token.getNode());
jbpmContext.save(processInstance);
}finally {
jbpmContext.close();
}
}
-----------------------------------------------------
运行结果：
StartState(yyteststart)
ProcessState(initial_subyytest)
State(subyyteststate1)
EndState(subyytestend)
EndState(yytestend)
补充：
自循环的流程：
<process-definition name="recursive process">
<start-state>
<transition to="first wait"/>
</start-state>
<state name="first wait">
<transition to="subprocessnode"/>
<transition name="done" to="end"/>
</state>
<process-state name="subprocessnode">
<sub-process name="recursive process"/>
<transition to="end"/>
</process-state>
<end-state name="end"/>
</process-definition>
-----------------------------------------------------
关联指定version的子流程
<process-definition>
<process-state name="the sub process state">
<sub-process name="the ultimate subprocess" version="1"/>
</process-state>
</process-definition>
通常，当一个子流程被启动，在离开开始状态的信号被发出之前，所有拥有“read”存取属性的变量都被从超流程载入新创建的子流程；当子流程结束 时，所有拥有“write”存取属性的变量都被从子流程拷贝到超流程。variabled元素的mapped-name属性允许你指定在子流程中将使用的 变量名称。
相对于上例改动如下
<?xml version="1.0" encoding="UTF-8"?>
<process-definition xmlns="" name="yytest">
<start-state name='yyteststart' >
<transition name='done' to="initial_subyytest" />
</start-state>
<process-state name="initial_subyytest">
<sub-process name="subyytest" />
<variable name="a" access="read,write" mapped-name="aa" />
<variable name="b" access="read" mapped-name="bb" />
<transition name='done' to="yytestend" />
</process-state>
<end-state name="yytestend" />
</process-definition>
---------------------------------------
private static void run(){
JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
try {
long processInstanceId =1;
processInstance = jbpmContext.loadProcessInstance(processInstanceId);
ContextInstance contextInstance = processInstance.getContextInstance();
contextInstance.setVariable("a", "1");
contextInstance.setVariable("b", "1");
System.out.println("主流程变量a:"+contextInstance.getVariable("a"));
System.out.println("主流程变量b:"+contextInstance.getVariable("b"));
Token token = processInstance.getRootToken();
System.out.println(token.getNode());
token.signal();
ProcessInstance subprocessInstance=token.getSubProcessInstance();
/*取得subprocessInstance方法二
long processInstanceId = processInstance.getId();
long subProcessInstanceId = processInstance.getRootToken().getSubProcessInstance().getId();
processInstance = jbpmContext.loadProcessInstance(processInstanceId);
ProcessInstance subprocessInstance = jbpmContext.loadProcessInstance(subProcessInstanceId);
*/
contextInstance = subprocessInstance.getContextInstance();
System.out.println("子流程变量aa:"+contextInstance.getVariable("aa"));
System.out.println("子流程变量bb:"+contextInstance.getVariable("bb"));
contextInstance.setVariable("aa", "2");
contextInstance.setVariable("bb", "2");
Token subtoken = subprocessInstance.getRootToken();
System.out.println(token.getNode());
System.out.println(subtoken.getNode());
subtoken.signal();
contextInstance = processInstance.getContextInstance();
System.out.println("主流程变量a:"+contextInstance.getVariable("a"));
System.out.println("主流程变量b:"+contextInstance.getVariable("b"));
System.out.println(subtoken.getNode());
System.out.println(token.getNode());
jbpmContext.save(processInstance);
}finally {
jbpmContext.close();
}
}
------------------------------
运行结果：
主流程变量b:1
StartState(yyteststart)
子流程变量aa:1
子流程变量bb:1
ProcessState(initial_subyytest)
State(subyyteststate1)
主流程变量a:2
主流程变量b:1
EndState(subyytestend)
EndState(yytestend)