activiti 中的异步任务未执行

Question

我对使用 activiti 引擎和 Java 实现的简单工作流程有疑问，我无法异步执行任务。 工作流程非常简单

工作流的上半部分启动一个流程执行“启动服务任务”发出信号并执行“循环服务任务”并重复10次。 底部由上部发出的信号触发，必须异步执行循环部分，但实际上它阻塞了“循环服务任务”。

我尝试在底部流程中设置 async 属性，但在这种情况下，底部不会执行。 按照链接到 github 项目。 https://github.com/giane88/testActiviti

package configuration;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngineConfiguration;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.impl.asyncexecutor.AsyncExecutor;
import org.activiti.engine.impl.asyncexecutor.ManagedAsyncJobExecutor;
import org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration;

public class WorkflowConfiguration {
  final ProcessEngine processEngine;

  public WorkflowConfiguration(final String workFlowName) {
    processEngine = setUpProcessEngine(workFlowName);
  }

  public ProcessEngine getProcessEngine() {
    return processEngine;
  }

  private ProcessEngine setUpProcessEngine(String workFlowName) {
    ProcessEngineConfiguration cfg = null;
    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);
    final ProcessEngine processEngine = cfg.buildProcessEngine();
    RepositoryService repositoryService = processEngine.getRepositoryService();
    repositoryService.createDeployment().addClasspathResource("activiti/" + workFlowName)
        .deploy();
    return processEngine;
  }

}

package configuration;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.runtime.ProcessInstance;

import java.util.HashMap;
import java.util.Map;

public class WorkflowManipulator {
  private final Map<String, Object> nextDelegateVariables ;
  private final String wfName;
  private final ProcessEngine engine;

  public WorkflowManipulator(String wfName, ProcessEngine engine) {
    this.nextDelegateVariables = new HashMap<>();
    this.wfName = wfName;
    this.engine = engine;
  }


  public ProcessInstance startProcess() {
    if (nextDelegateVariables.size() > 0) {
      return engine.getRuntimeService().startProcessInstanceByKey(wfName, nextDelegateVariables);
    } else {
      return engine.getRuntimeService().startProcessInstanceByKey(wfName);
    }
  }
}

@Log4j2
public class TestWorkFlowMain {

  public static void main(String[] args) throws IOException {

    WorkflowConfiguration workflowConfiguration = new WorkflowConfiguration("test.bpmn");
    WorkflowManipulator workflowManipulator = new WorkflowManipulator("testProcess", workflowConfiguration.getProcessEngine());
    ProcessInstance processInstance = workflowManipulator.startProcess();
  }
}

package delegates;

import lombok.extern.log4j.Log4j2;
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.JavaDelegate;

@Log4j2
public class AsyncServiceTask implements JavaDelegate {
  @Override
  public void execute(DelegateExecution execution) throws Exception {
    log.info("Sleeping for 3 second");
    Thread.sleep(3000);
    log.warn("AsyncCompleted");
  }
}

Answer 1

像往常一样，我在发布问题几分钟后找到了解决方案。 问题出在流程引擎配置中，您需要设置 asyncExecutor 并启用和激活它，如下例所示。

    ProcessEngineConfiguration cfg;
    AsyncExecutor asyncExecutor = new ManagedAsyncJobExecutor();
    cfg = new StandaloneInMemProcessEngineConfiguration()
        .setAsyncExecutor(asyncExecutor)
        .setAsyncExecutorEnabled(true)
        .setAsyncExecutorActivate(true);
    final ProcessEngine processEngine = cfg.buildProcessEngine();