Java ProcessDiagramGenerator.generateDiagram方法代码示例

import org.activiti.engine.impl.bpmn.diagram.ProcessDiagramGenerator; //导入方法依赖的package包/类
/**
 * 读取带跟踪的图片
 * @param executionId	环节ID
 * @return	封装了各种节点信息
 */
public InputStream tracePhoto(String processDefinitionId, String executionId) {
	// ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(executionId).singleResult();
	BpmnModel bpmnModel = repositoryService.getBpmnModel(processDefinitionId);
	
	List<String> activeActivityIds = Lists.newArrayList();
	if (runtimeService.createExecutionQuery().executionId(executionId).count() > 0){
		activeActivityIds = runtimeService.getActiveActivityIds(executionId);
	}
	
	// 不使用spring请使用下面的两行代码
	// ProcessEngineImpl defaultProcessEngine = (ProcessEngineImpl)ProcessEngines.getDefaultProcessEngine();
	// Context.setProcessEngineConfiguration(defaultProcessEngine.getProcessEngineConfiguration());

	// 使用spring注入引擎请使用下面的这行代码
	Context.setProcessEngineConfiguration(processEngine.getProcessEngineConfiguration());

	return ProcessDiagramGenerator.generateDiagram(bpmnModel, "png", activeActivityIds);
}
 

import org.activiti.engine.impl.bpmn.diagram.ProcessDiagramGenerator; //导入方法依赖的package包/类
/**
 * 显示图片
 * @return
 */
@RequestMapping(value = "/viewPic.do")
public void viewPic(HttpServletRequest request,
                    HttpServletResponse response,
                    @RequestParam("executionId") String executionId) throws Exception{
    ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(executionId).singleResult();
    BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId());
    List<String> activeActivityIds = runtimeService.getActiveActivityIds(executionId);

    // 使用spring注入引擎请使用下面的这行代码
    Context.setProcessEngineConfiguration(processEngine.getProcessEngineConfiguration());

    InputStream imageStream = ProcessDiagramGenerator.generateDiagram(bpmnModel, "png", activeActivityIds);

    // 输出资源内容到相应对象
    byte[] b = new byte[1024];
    int len;
    while ((len = imageStream.read(b, 0, 1024)) != -1) {
        response.getOutputStream().write(b, 0, len);
    }
}
 

import org.activiti.engine.impl.bpmn.diagram.ProcessDiagramGenerator; //导入方法依赖的package包/类
@Get
public InputRepresentation getInstanceDiagram() {
  if(authenticate() == false) return null;
  
  String processInstanceId = (String) getRequest().getAttributes().get("processInstanceId");
  
  if(processInstanceId == null) {
    throw new ActivitiException("No process instance id provided");
  }

  ExecutionEntity pi =
      (ExecutionEntity) ActivitiUtil.getRuntimeService().createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();

  if (pi == null) {
    throw new ActivitiException("Process instance with id" + processInstanceId + " could not be found");
  }

  ProcessDefinitionEntity pde = (ProcessDefinitionEntity) ((RepositoryServiceImpl) ActivitiUtil.getRepositoryService())
      .getDeployedProcessDefinition(pi.getProcessDefinitionId());

  if (pde != null && pde.isGraphicalNotationDefined()) {
    InputStream resource = ProcessDiagramGenerator.generateDiagram(pde, "png", ActivitiUtil.getRuntimeService().getActiveActivityIds(processInstanceId));

    InputRepresentation output = new InputRepresentation(resource);
    return output;
    
  } else {
    throw new ActivitiException("Process instance with id " + processInstanceId + " has no graphic description");
  }
}
 

import org.activiti.engine.impl.bpmn.diagram.ProcessDiagramGenerator; //导入方法依赖的package包/类
byte[] getActiveDocumentDiagram(String docId) throws IOException {
    log.debug("getting active diagram for doc: " + docId);
    //http://forums.activiti.org/content/process-diagram-highlighting-current-process
    ProcessInstance pi =
            runtimeService.createProcessInstanceQuery().processInstanceBusinessKey(docId).singleResult();

    RepositoryServiceImpl impl = (RepositoryServiceImpl)repoSrvc;
    ProcessDefinitionEntity pde = (ProcessDefinitionEntity) impl.getDeployedProcessDefinition(pi.getProcessDefinitionId());
    BpmnModel bpmnModel = repoSrvc.getBpmnModel(pde.getId());
    InputStream in = ProcessDiagramGenerator.generateDiagram(bpmnModel, "png", runtimeService.getActiveActivityIds(pi.getProcessInstanceId()));
    byte[] bytes = IOUtils.toByteArray(in);
    IOUtils.closeQuietly(in);
    log.debug("Got bytes of size: " + bytes.length);
    return bytes;
}
 

import org.activiti.engine.impl.bpmn.diagram.ProcessDiagramGenerator; //导入方法依赖的package包/类
public static InputStream getImageStream(String taskId) throws Exception{
  	ProcessDefinitionEntity pde = findProcessDefinitionEntityByTaskId(taskId);
  	InputStream imageStream = ProcessDiagramGenerator.generateDiagram(  
		pde, "png",  
runtimeService.getActiveActivityIds(findProcessInstanceByTaskId(taskId).getId()));
  	return imageStream;
  }
 

import org.activiti.engine.impl.bpmn.diagram.ProcessDiagramGenerator; //导入方法依赖的package包/类
@Test
public void testDocApprovalFlow() throws InterruptedException, IOException {
    setSpringSecurity("kermit");
    Document doc = new Document();
    doc.setGroupId("engineering");
    doc.setCreatedDate(new Date());
    doc.setTitle("title");
    doc.setSummary("Summary");
    doc.setContent("content");
    doc.setAuthor("kermit");
    String docId;
    docId = documentService.createDocument(doc);
    log.debug("new doc id: " + docId);
    this.documentService.submitForApproval(docId);



    setSpringSecurity("fozzie");
    List<TaskForm> tasks = this.localTaskService.getTasks("fozzie");
    assertTrue(tasks.size() == 1);
    TaskForm currentTask = tasks.get(0);
    log.debug("got task: " + tasks.get(0).getName());

    //http://forums.activiti.org/content/process-diagram-highlighting-current-process
    RepositoryServiceImpl impl = (RepositoryServiceImpl)repoSrvc;
    ProcessDefinitionEntity pde = (ProcessDefinitionEntity) impl.getDeployedProcessDefinition(currentTask.getProcessDefinitionId());
    BpmnModel bpmnModel = repoSrvc.getBpmnModel(pde.getId());
    InputStream in = ProcessDiagramGenerator.generateDiagram(bpmnModel, "png", runtimeService.getActiveActivityIds(currentTask.getProcessInstanceId()));
    FileUtils.copyInputStreamToFile(in, new File("target/current-diagram.png"));

    localTaskService.approveTask(true, "task approved blah blah blah", tasks.get(0).getId());
    HistoricProcessInstance pi = historyService.createHistoricProcessInstanceQuery().
            includeProcessVariables().processInstanceBusinessKey(docId).singleResult();

    assertNotNull(pi);
    log.debug("Duration time in millis: " + pi.getDurationInMillis());
    List<HistoricTaskInstance> hTasks;
    hTasks = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables().processInstanceBusinessKey(docId).list();
    assertTrue(hTasks.size() == 2);
    HistoricTaskInstance approval = hTasks.get(1);
    Map<String, Object> vars = approval.getTaskLocalVariables();
    List<Comment> comments = taskService.getTaskComments(approval.getId());
}
 

import org.activiti.engine.impl.bpmn.diagram.ProcessDiagramGenerator; //导入方法依赖的package包/类
public InputStream getImageStream(String taskId) throws Exception{
  	ProcessDefinitionEntity pde = findProcessDefinitionEntityByTaskId(taskId);
  	InputStream imageStream = ProcessDiagramGenerator.generateDiagram(pde, "png",  
runtimeService.getActiveActivityIds(findProcessInstanceByTaskId(taskId).getId()));
  	return imageStream;
  }