[英]Activiti Job Executor problem with async serviceTasks (activiti >= 5.17)
請考慮下圖
我的進程.bpmn
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
<process id="myProcess" name="My process" isExecutable="true">
<startEvent id="startevent1" name="Start"></startEvent>
<userTask id="evl" name="Evaluation"></userTask>
<boundaryEvent id="timer_event_autocomplete" name="Timer" attachedToRef="evl" cancelActivity="false">
<timerEventDefinition>
<timeDate>PT2S</timeDate>
</timerEventDefinition>
</boundaryEvent>
<serviceTask id="timer_service" name="Timed Autocomplete" activiti:async="true" activiti:class="com.example.service.TimerService"></serviceTask>
<serviceTask id="store_docs_service" name="Store Documents" activiti:async="true" activiti:class="com.example.service.StoreDocsService"></serviceTask>
<sequenceFlow id="flow1" sourceRef="startevent1" targetRef="evl"></sequenceFlow>
<sequenceFlow id="flow2" sourceRef="timer_event_autocomplete" targetRef="timer_service"></sequenceFlow>
<sequenceFlow id="flow3" sourceRef="evl" targetRef="store_docs_service"></sequenceFlow>
<sequenceFlow id="flow4" sourceRef="store_docs_service" targetRef="endevent1"></sequenceFlow>
<endEvent id="endevent1" name="End"></endEvent>
</process>
</definitions>
用文字來描述它,有一個用戶任務(評估)和一個附加到它的計時器(配置為在 2 秒內觸發)。 觸發計時器后,其 Java 委托TimerService
的定時自動完成異步服務任務嘗試完成用戶任務(評估)。 完成用戶任務(評估)后,流程移動到另一個異步服務任務(存儲文檔),它調用其 Java 委托StoreDocsService
,然后流程結束。
定時器服務.java
public class TimerService implements JavaDelegate {
Logger LOGGER = LoggerFactory.getLogger(TimerService.class);
@Override
public void execute(DelegateExecution execution) throws Exception {
LOGGER.info("*** Executing Timer autocomplete ***");
Task task = execution.getEngineServices().getTaskService().createTaskQuery().active().singleResult();
execution.getEngineServices().getTaskService().complete(task.getId());
LOGGER.info("*** Task: {} autocompleted by timer ***", task.getId());
}
}
StoreDocsService.java
public class StoreDocsService implements JavaDelegate {
Logger LOGGER = LoggerFactory.getLogger(StoreDocsService.class);
@Override
public void execute(DelegateExecution execution) throws Exception {
LOGGER.info("*** Executing Store Documents ***");
}
}
應用程序.java
public class App
{
public static void main( String[] args ) throws Exception
{
// DefaultAsyncJobExecutor demoAsyncJobExecutor = new DefaultAsyncJobExecutor();
// demoAsyncJobExecutor.setCorePoolSize(10);
// demoAsyncJobExecutor.setMaxPoolSize(50);
// demoAsyncJobExecutor.setKeepAliveTime(10000);
// demoAsyncJobExecutor.setMaxAsyncJobsDuePerAcquisition(50);
ProcessEngineConfiguration cfg = new StandaloneProcessEngineConfiguration()
.setJdbcUrl("jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000")
.setJdbcUsername("sa")
.setJdbcPassword("")
.setJdbcDriver("org.h2.Driver")
.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE)
// .setAsyncExecutorActivate(true)
// .setAsyncExecutorEnabled(true)
// .setAsyncExecutor(demoAsyncJobExecutor)
.setJobExecutorActivate(true)
;
ProcessEngine processEngine = cfg.buildProcessEngine();
String pName = processEngine.getName();
String ver = ProcessEngine.VERSION;
System.out.println("ProcessEngine [" + pName + "] Version: [" + ver + "]");
RepositoryService repositoryService = processEngine.getRepositoryService();
Deployment deployment = repositoryService.createDeployment()
.addClasspathResource("MyProcess.bpmn").deploy();
ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery()
.deploymentId(deployment.getId()).singleResult();
System.out.println(
"Found process definition ["
+ processDefinition.getName() + "] with id ["
+ processDefinition.getId() + "]");
final Map<String, Object> variables = new HashMap<String, Object>();
final RuntimeService runtimeService = processEngine.getRuntimeService();
ProcessInstance id = runtimeService.startProcessInstanceByKey("myProcess", variables);
System.out.println("Started Process Id: "+id.getId());
try {
final TaskService taskService = processEngine.getTaskService();
// List<Task> tasks = taskService.createTaskQuery().active().list();
// while (!tasks.isEmpty()) {
// Task task = tasks.get(0);
// taskService.complete(task.getId());
// tasks = taskService.createTaskQuery().active().list();
// }
} catch (Exception e) {
System.out.println(e.getMessage());
} finally {
}
while(!runtimeService.createExecutionQuery().list().isEmpty()) {
}
processEngine.close();
}
}
活動 5.15
當定時器觸發時,如上圖所述執行。 我們使用 Activiti 的DefaultJobExecutor
正如我們在日志中看到的:
[main] INFO org.activiti.engine.impl.ProcessEngineImpl - ProcessEngine default created
[main] INFO org.activiti.engine.impl.jobexecutor.JobExecutor - Starting up the JobExecutor[org.activiti.engine.impl.jobexecutor.DefaultJobExecutor].
[Thread-1] INFO org.activiti.engine.impl.jobexecutor.AcquireJobsRunnable - JobExecutor[org.activiti.engine.impl.jobexecutor.DefaultJobExecutor] starting to acquire jobs
ProcessEngine [default] Version: [5.15]
[main] INFO org.activiti.engine.impl.bpmn.deployer.BpmnDeployer - Processing resource MyProcess.bpmn
Found process definition [My process] with id [myProcess:1:3]
Started Process Id: 4
[pool-1-thread-1] INFO com.example.service.TimerService - *** Executing Timer autocomplete ***
[pool-1-thread-1] INFO com.example.service.TimerService - *** Task: 9 autocompleted by timer ***
[pool-1-thread-1] INFO com.example.service.StoreDocsService - *** Executing Store Documents ***
[main] INFO org.activiti.engine.impl.jobexecutor.JobExecutor - Shutting down the JobExecutor[org.activiti.engine.impl.jobexecutor.DefaultJobExecutor].
[Thread-1] INFO org.activiti.engine.impl.jobexecutor.AcquireJobsRunnable - JobExecutor[org.activiti.engine.impl.jobexecutor.DefaultJobExecutor] stopped job acquisition
Activiti >= 5.17僅將pom.xml
的 activiti 版本更改為 5.17.0 及以上(測試到 5.22.0)並執行相同的代碼,流程執行計時器的 Java Delegate TimerService
,完成用戶任務(評估)但是 Store Documents Java Delegate, StoreDocsService
永遠不會被調用。 要添加更多內容,流程似乎永遠不會結束,並且執行仍然停留在 Store Documents 異步服務任務上。
日志:
[main] INFO org.activiti.engine.impl.ProcessEngineImpl - ProcessEngine default created
[main] INFO org.activiti.engine.impl.jobexecutor.JobExecutor - Starting up the JobExecutor[org.activiti.engine.impl.jobexecutor.DefaultJobExecutor].
[Thread-1] INFO org.activiti.engine.impl.jobexecutor.AcquireJobsRunnableImpl - JobExecutor[org.activiti.engine.impl.jobexecutor.DefaultJobExecutor] starting to acquire jobs
ProcessEngine [default] Version: [5.17.0.2]
[main] INFO org.activiti.engine.impl.bpmn.deployer.BpmnDeployer - Processing resource MyProcess.bpmn
Found process definition [My process] with id [myProcess:1:3]
Started Process Id: 4
[pool-1-thread-2] INFO com.example.service.TimerService - *** Executing Timer autocomplete ***
[pool-1-thread-2] INFO com.example.service.TimerService - *** Task: 9 autocompleted by timer ***
App.java
啟用異步執行器: DefaultAsyncJobExecutor demoAsyncJobExecutor = new DefaultAsyncJobExecutor();
demoAsyncJobExecutor.setCorePoolSize(10);
demoAsyncJobExecutor.setMaxPoolSize(50);
demoAsyncJobExecutor.setKeepAliveTime(10000);
demoAsyncJobExecutor.setMaxAsyncJobsDuePerAcquisition(50);
ProcessEngineConfiguration cfg = new StandaloneProcessEngineConfiguration()
.setJdbcUrl("jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000")
.setJdbcUsername("sa")
.setJdbcPassword("")
.setJdbcDriver("org.h2.Driver")
.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE)
.setAsyncExecutorActivate(true)
.setAsyncExecutorEnabled(true)
.setAsyncExecutor(demoAsyncJobExecutor)
;
流動似乎正確執行, StoreDocsService
被稱為后TimerService
,但它永遠不會結束(在while(!runtimeService.createExecutionQuery().list().isEmpty())
在聲明中App.java
始終是真實的)!
日志:
[main] INFO org.activiti.engine.impl.ProcessEngineImpl - ProcessEngine default created
[main] INFO org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor - Starting up the default async job executor [org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor].
[main] INFO org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor - Creating thread pool queue of size 100
[main] INFO org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor - Creating executor service with corePoolSize 10, maxPoolSize 50 and keepAliveTime 10000
[Thread-1] INFO org.activiti.engine.impl.asyncexecutor.AcquireTimerJobsRunnable - {} starting to acquire async jobs due
[Thread-2] INFO org.activiti.engine.impl.asyncexecutor.AcquireAsyncJobsDueRunnable - {} starting to acquire async jobs due
ProcessEngine [default] Version: [5.17.0.2]
[main] INFO org.activiti.engine.impl.bpmn.deployer.BpmnDeployer - Processing resource MyProcess.bpmn
Found process definition [My process] with id [myProcess:1:3]
Started Process Id: 4
[pool-1-thread-2] INFO com.example.service.TimerService - *** Executing Timer autocomplete ***
[pool-1-thread-2] INFO com.example.service.TimerService - *** Task: 9 autocompleted by timer ***
[pool-1-thread-3] INFO com.example.service.StoreDocsService - *** Executing Store Documents ***
!!!! 更新 !!!
活動 6.0.0
嘗試了相同的場景,但使用 Activiti 版本6.0.0
。 TimerService
所需的更改,無法從DelegateExecution
獲取EngineServices
:
public class TimerService implements JavaDelegate {
Logger LOGGER = LoggerFactory.getLogger(TimerService.class);
@Override
public void execute(DelegateExecution execution) {
LOGGER.info("*** Executing Timer autocomplete ***");
Task task = Context.getProcessEngineConfiguration().getTaskService().createTaskQuery().active().singleResult();
Context.getProcessEngineConfiguration().getTaskService().complete(task.getId());
// Task task = execution.getEngineServices().getTaskService().createTaskQuery().active().singleResult();
// execution.getEngineServices().getTaskService().complete(task.getId());
LOGGER.info("*** Task: {} autocompleted by timer ***", task.getId());
}
}
並且此版本只有異步執行器,因此App.java
的ProcessEngineConfiguration
更改為:
ProcessEngineConfiguration cfg = new StandaloneProcessEngineConfiguration()
.setJdbcUrl("jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000")
.setJdbcUsername("sa")
.setJdbcPassword("")
.setJdbcDriver("org.h2.Driver")
.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE)
.setAsyncExecutorActivate(true)
// .setAsyncExecutorEnabled(true)
// .setAsyncExecutor(demoAsyncJobExecutor)
// .setJobExecutorActivate(true)
;
正如我們在日志中看到的那樣,使用6.0.0
版本和異步執行器,該過程成功完成:
[main] INFO org.activiti.engine.impl.ProcessEngineImpl - ProcessEngine default created
[main] INFO org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor - Starting up the default async job executor [org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor].
[main] INFO org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor - Creating thread pool queue of size 100
[main] INFO org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor - Creating executor service with corePoolSize 2, maxPoolSize 10 and keepAliveTime 5000
[Thread-1] INFO org.activiti.engine.impl.asyncexecutor.AcquireAsyncJobsDueRunnable - {} starting to acquire async jobs due
[Thread-2] INFO org.activiti.engine.impl.asyncexecutor.AcquireTimerJobsRunnable - {} starting to acquire async jobs due
[Thread-3] INFO org.activiti.engine.impl.asyncexecutor.ResetExpiredJobsRunnable - {} starting to reset expired jobs
ProcessEngine [default] Version: [6.0.0.4]
Found process definition [My process] with id [myProcess:1:3]
Started Process Id: 4
[activiti-async-job-executor-thread-2] INFO com.example.service.TimerService - *** Executing Timer autocomplete ***
[activiti-async-job-executor-thread-2] INFO com.example.service.TimerService - *** Task: 10 autocompleted by timer ***
[activiti-async-job-executor-thread-2] INFO com.example.service.StoreDocsService - *** Executing Store Documents ***
[main] INFO org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor - Shutting down the default async job executor [org.activiti.engine.impl.asyncexecutor.DefaultAsyncJobExecutor].
[activiti-reset-expired-jobs] INFO org.activiti.engine.impl.asyncexecutor.ResetExpiredJobsRunnable - {} stopped resetting expired jobs
[activiti-acquire-timer-jobs] INFO org.activiti.engine.impl.asyncexecutor.AcquireTimerJobsRunnable - {} stopped async job due acquisition
[activiti-acquire-async-jobs] INFO org.activiti.engine.impl.asyncexecutor.AcquireAsyncJobsDueRunnable - {} stopped async job due acquisition
Process finished with exit code 0
2 問題:
5.15
升級到5.22.0
,我們不使用異步作業執行器。 有什么辦法可以讓這張圖的功能保持在5.15
中的表現?上面的示例項目可以在以下位置找到: https : //github.com/pleft/DemoActiviti
如果沒有明確回答您需要設置環境和調試的問題,我建議您至少轉向 Activiti 6。Activiti 的 5.x 分支已經超過 5 年沒有維護,實際上已經死了。 由於核心開發人員都轉移到“Flowable”項目,甚至 6.x 系列也幾乎被放棄了。 如果您選擇繼續使用 Activiti 5.x,您的選擇是:
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