Activiti中动态流程生成

1. import java.io.File;  
2. import java.io.IOException;  
3. import java.io.InputStream;  
4. import java.util.ArrayList;  
5. import java.util.List;  
6. import org.activiti.bpmn.BpmnAutoLayout;  
7. import org.activiti.bpmn.model.BpmnModel;  
8. import org.activiti.bpmn.model.EndEvent;  
9. import org.activiti.bpmn.model.ExclusiveGateway;  
10. import org.activiti.bpmn.model.Process;  
11. import org.activiti.bpmn.model.SequenceFlow;  
12. import org.activiti.bpmn.model.StartEvent;  
13. import org.activiti.bpmn.model.UserTask;  
14. import org.activiti.engine.ProcessEngine;  
15. import org.activiti.engine.ProcessEngineConfiguration;  
16. import org.activiti.engine.repository.Deployment;  
17. import org.activiti.engine.runtime.ProcessInstance;  
18. import org.activiti.engine.task.Task;  
19. import org.apache.commons.io.FileUtils;  
20. import org.apache.commons.lang.StringUtils;  
21. import org.junit.Assert;  
22.   
23. /** 
24.  *  
25.  */  
26.   
27. /**   
28.  * @ClassName: ActivitiTest01 
29.  * @Description: TODO(activiti 工作流程图自动生成) 
30.  * @author liang 
31.  * @date 2016年4月20日 上午8:32:56 
32.  * 
33.  */  
34. public class ActivitiTest01 {  
35.   
36.     public static void main(String[] args) {  
37.         try {  
38.             test01();  
39.         } catch (IOException e) {  
40.             e.printStackTrace();  
41.         }  
42.     }  
43.       
44.     public static void test01() throws IOException {  
45.         System.out.println(".........start...");  
46.         ProcessEngine processEngine=getProcessEngine();  
47.           
48.         // 1. Build up the model from scratch  
49.         BpmnModel model = new BpmnModel();    
50.         Process process=new Process();  
51.         model.addProcess(process);   
52.         final String PROCESSID ="process01";  
53.         final String PROCESSNAME ="测试01";  
54.         process.setId(PROCESSID);   
55.         process.setName(PROCESSNAME);  
56.           
57.         process.addFlowElement(createStartEvent());    
58.         process.addFlowElement(createUserTask("task1", "节点01", "candidateGroup1"));   
59.         process.addFlowElement(createExclusiveGateway("createExclusiveGateway1"));   
60.         process.addFlowElement(createUserTask("task2", "节点02", "candidateGroup2"));   
61.         process.addFlowElement(createExclusiveGateway("createExclusiveGateway2"));   
62.         process.addFlowElement(createUserTask("task3", "节点03", "candidateGroup3"));   
63.         process.addFlowElement(createExclusiveGateway("createExclusiveGateway3"));   
64.         process.addFlowElement(createUserTask("task4", "节点04", "candidateGroup4"));  
65.         process.addFlowElement(createEndEvent());    
66.           
67.         process.addFlowElement(createSequenceFlow("startEvent", "task1", "", ""));   
68.         process.addFlowElement(createSequenceFlow("task1", "task2", "", ""));   
69.         process.addFlowElement(createSequenceFlow("task2", "createExclusiveGateway1", "", ""));  
70.         process.addFlowElement(createSequenceFlow("createExclusiveGateway1", "task1", "不通过", "${pass=='2'}"));  
71.         process.addFlowElement(createSequenceFlow("createExclusiveGateway1", "task3", "通过", "${pass=='1'}"));   
72.         process.addFlowElement(createSequenceFlow("task3", "createExclusiveGateway2", "", ""));  
73.         process.addFlowElement(createSequenceFlow("createExclusiveGateway2", "task2", "不通过", "${pass=='2'}"));  
74.         process.addFlowElement(createSequenceFlow("createExclusiveGateway2", "task4", "通过", "${pass=='1'}"));  
75.         process.addFlowElement(createSequenceFlow("task4", "createExclusiveGateway3", "", ""));  
76.         process.addFlowElement(createSequenceFlow("createExclusiveGateway3", "task3", "不通过", "${pass=='2'}"));  
77.         process.addFlowElement(createSequenceFlow("createExclusiveGateway3", "endEvent", "通过", "${pass=='1'}"));  
78.           
79.         // 2. Generate graphical information    
80.         new BpmnAutoLayout(model).execute();  
81.           
82.         // 3. Deploy the process to the engine    
83.         Deployment deployment = processEngine.getRepositoryService().createDeployment().addBpmnModel(PROCESSID+".bpmn", model).name(PROCESSID+"_deployment").deploy();    
84.              
85.         // 4. Start a process instance    
86.         ProcessInstance processInstance = processEngine.getRuntimeService().startProcessInstanceByKey(PROCESSID);   
87.           
88.         // 5. Check if task is available    
89.         List tasks = processEngine.getTaskService().createTaskQuery().processInstanceId(processInstance.getId()).list();  
90.         Assert.assertEquals(1, tasks.size());         
91.           
92.         // 6. Save process diagram to a file      
93.         InputStream processDiagram = processEngine.getRepositoryService().getProcessDiagram(processInstance.getProcessDefinitionId());    
94.         FileUtils.copyInputStreamToFile(processDiagram, new File("/deployments/"+PROCESSID+".png"));    
95.              
96.         // 7. Save resulting BPMN xml to a file    
97.         InputStream processBpmn = processEngine.getRepositoryService().getResourceAsStream(deployment.getId(), PROCESSID+".bpmn");    
98.         FileUtils.copyInputStreamToFile(processBpmn,new File("/deployments/"+PROCESSID+".bpmn"));  
99.           
100.         System.out.println(".........end...");  
101.     }  
102.       
103.     protected static ProcessEngine getProcessEngine(){  
104.         ProcessEngine processEngine=ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration()  
105.                 .setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_FALSE)  
106.                 .setJdbcUrl("jdbc:mysql://127.0.0.1:3306/activitiDB")  
107.                 .setJdbcDriver("com.mysql.jdbc.Driver")  
108.                 .setJdbcUsername("root")  
109.                 .setJdbcPassword("123456")  
110.                 .setDatabaseSchemaUpdate("true")  
111.                 .setJobExecutorActivate(false)  
112.                 .buildProcessEngine();  
113.         return processEngine;  
114.                   
115.     }  
116.   
117.     /*任务节点*/  
118.     protected static UserTask createUserTask(String id, String name, String candidateGroup) {  
119.         List candidateGroups=new ArrayList();  
120.         candidateGroups.add(candidateGroup);  
121.         UserTask userTask = new UserTask();  
122.         userTask.setName(name);  
123.         userTask.setId(id);  
124.         userTask.setCandidateGroups(candidateGroups);  
125.         return userTask;  
126.     }  
127.   
128.     /*连线*/  
129.     protected static SequenceFlow createSequenceFlow(String from, String to,String name,String conditionExpression) {  
130.         SequenceFlow flow = new SequenceFlow();  
131.         flow.setSourceRef(from);  
132.         flow.setTargetRef(to);  
133.         flow.setName(name);  
134.         if(StringUtils.isNotEmpty(conditionExpression)){  
135.             flow.setConditionExpression(conditionExpression);  
136.         }         
137.         return flow;  
138.     }  
139.       
140.     /*排他网关*/  
141.     protected static ExclusiveGateway createExclusiveGateway(String id) {  
142.         ExclusiveGateway exclusiveGateway = new ExclusiveGateway();  
143.         exclusiveGateway.setId(id);  
144.         return exclusiveGateway;  
145.     }  
146.   
147.     /*开始节点*/  
148.     protected static StartEvent createStartEvent() {  
149.         StartEvent startEvent = new StartEvent();  
150.         startEvent.setId("startEvent");  
151.         return startEvent;  
152.     }  
153.   
154.     /*结束节点*/  
155.     protected static EndEvent createEndEvent() {  
156.         EndEvent endEvent = new EndEvent();  
157.         endEvent.setId("endEvent");  
158.         return endEvent;  
159.     }  
160.       
161. }