JBPM学习(五):流程变量
1.启动流程实例
// 启动流程实例 @Test public void startProcessInstance() { // 使用指定key的最新版本的流程定义启动流程实例 ProcessInstance pi = processEngine.getExecutionService().startProcessInstanceByKey("test"); System.out.println("processInstanceId=" + pi.getId()); }
2.设置流程变量
a) 一个设置流程变量实例
//设置流程变量 @Test public void setVariable() { String executionId = "test.140001"; String name = "请假天数"; Integer value = 3; //将name为"请假天数",value=3的流程变量设置到executionId为test.140001的执行对象上 processEngine.getExecutionService().setVariable(executionId, name, value); }b) 所有设置流程变量方法
用到变量的类型:
Object value = ""; String executionId = ""; String taskId = ""; String name = ""; String processDefinitionKey = ""; String variableName = ""; Set<String> variableNames = new HashSet<String>(); Map<String, Object> variablesMap = new HashMap<String, Object>();具体方法:
// 根据Execution设置一个流程变量 processEngine.getExecutionService().setVariable(executionId, name, value); // 根据Execution设置多个流程变量(需要先把流程变量放到一个Map中) processEngine.getExecutionService().setVariables(executionId, variablesMap); // 根据Task设置多个流程变量(需要先把流程变量放到一个Map中,通过Task方法,它会先找到它所属的Execution然后设置流程变量) processEngine.getTaskService().setVariables(taskId, variablesMap); // 使用指定key的最新版本的流程定义启动流程实例,并设置一些流程变量 processEngine.getExecutionService().startProcessInstanceByKey(processDefinitionKey, variablesMap); // 办理完指定的任务,并设置一些流程变量 processEngine.getTaskService().completeTask(taskId, variablesMap);
3.获取流程变量
a) 一个获取流程变量实例
//获取流程变量 @Test public void getVariable() { String executionId = "test.140001"; String variableName = "请假天数"; //从executionId为test.140001的执行对象上取出流程变量名为"请假天数"的流程变量的value Integer value = (Integer) processEngine.getExecutionService().getVariable(executionId, variableName); System.out.println(variableName + " = " + value); }
b) 所有获取流程变量方法
用到变量的类型:
String executionId = ""; String taskId = ""; String variableName = ""; Set<String> variableNames = new HashSet<String>();具体方法:
// 根据Execution获取指定名称的一个流程变量 processEngine.getExecutionService().getVariable(executionId, variableName); // 根据Execution获取所有流程变量的名称 processEngine.getExecutionService().getVariableNames(executionId); // 根据Execution获取指定名称的所有流程变量 processEngine.getExecutionService().getVariables(executionId, variableNames); // 根据Task获取指定名称的一个流程变量 processEngine.getTaskService().getVariable(taskId, variableName); // 根据Task获取所有流程变量的名称 processEngine.getTaskService().getVariableNames(taskId); // 根据Task获取指定名称的所有流程变量 processEngine.getTaskService().getVariables(taskId, variableNames);
4.流程变量所支持的值的类型(jBPM User Guide,7.2. Variable types)
jBPM supports following Java types as process variables:
- java.lang.String
- java.lang.Long
- java.lang.Double
- java.util.Date
- java.lang.Boolean
- java.lang.Character
- java.lang.Byte
- java.lang.Short
- java.lang.Integer
- java.lang.Float
- byte[] (byte array)
- char[] (char array)
- hibernate entity with a long id
- hibernate entity with a string id
- serializable
For persistence of these variable, the type of the variable is checked in the order of this list. The first match will determine how the variable is stored.