Activiti-boundary计时器事件在触发时抛出异常

时间：2017-09-13 15:08:05

标签： timer activiti bpmn

我在用户任务上应用了边界计时器事件，我在服务任务类属性上添加了java类，但是当一个计时器到期并触发异常抛出列表时，即找不到分配给服务任务的类。虽然类存在于类路径上。在activiti配置中也启用了asyncExecutorActivate属性

这是一个代码

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/processdef">
  <process id="timertest" name="timertest" isExecutable="true">
    <startEvent id="startEvent1"></startEvent>
    <userTask id="sid-9F95F9B8-6C5C-4221-B3A7-3BD2BAEC22CA"></userTask>
    <sequenceFlow id="sid-08270597-3D34-4CFD-BACF-CB95036CBC48" sourceRef="startEvent1" targetRef="sid-9F95F9B8-6C5C-4221-B3A7-3BD2BAEC22CA"></sequenceFlow>
    <boundaryEvent id="sid-5AC91A08-17CC-4F6E-ABC2-2B8AF63EAB66" attachedToRef="sid-9F95F9B8-6C5C-4221-B3A7-3BD2BAEC22CA" cancelActivity="true">
      <timerEventDefinition>
        <timeDate>${expiresOn}</timeDate>
      </timerEventDefinition>
    </boundaryEvent>
    <endEvent id="sid-1D6E7697-6ECA-42BA-98E5-BE089A78DCF2"></endEvent>
    <sequenceFlow id="sid-A4C68C9C-38C3-43A9-BB3F-83FABACA65F9" sourceRef="sid-CE624FA0-9F7E-4FF9-BF3E-C016D046A3BF" targetRef="sid-1D6E7697-6ECA-42BA-98E5-BE089A78DCF2"></sequenceFlow>
    <serviceTask id="sid-CE624FA0-9F7E-4FF9-BF3E-C016D046A3BF" activiti:class="com.softech.workflowengine.workflow.policyack.servicetask.TimerClass"></serviceTask>
    <sequenceFlow id="sid-799456B9-F667-4E98-A856-E1AA7B79F680" sourceRef="sid-5AC91A08-17CC-4F6E-ABC2-2B8AF63EAB66" targetRef="sid-CE624FA0-9F7E-4FF9-BF3E-C016D046A3BF"></sequenceFlow>
    <endEvent id="sid-705703CA-B642-435C-8393-B236EC3E964B"></endEvent>
    <sequenceFlow id="sid-010B8977-34F9-40F4-B694-D56D5BA34257" sourceRef="sid-9F95F9B8-6C5C-4221-B3A7-3BD2BAEC22CA" targetRef="sid-705703CA-B642-435C-8393-B236EC3E964B"></sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_timertest">
    <bpmndi:BPMNPlane bpmnElement="timertest" id="BPMNPlane_timertest">
      <bpmndi:BPMNShape bpmnElement="startEvent1" id="BPMNShape_startEvent1">
        <omgdc:Bounds height="30.0" width="30.0" x="100.0" y="163.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-9F95F9B8-6C5C-4221-B3A7-3BD2BAEC22CA" id="BPMNShape_sid-9F95F9B8-6C5C-4221-B3A7-3BD2BAEC22CA">
        <omgdc:Bounds height="80.0" width="100.0" x="175.0" y="138.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-5AC91A08-17CC-4F6E-ABC2-2B8AF63EAB66" id="BPMNShape_sid-5AC91A08-17CC-4F6E-ABC2-2B8AF63EAB66">
        <omgdc:Bounds height="31.0" width="31.0" x="253.59371010330312" y="202.75947444214634"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-1D6E7697-6ECA-42BA-98E5-BE089A78DCF2" id="BPMNShape_sid-1D6E7697-6ECA-42BA-98E5-BE089A78DCF2">
        <omgdc:Bounds height="28.0" width="28.0" x="405.0" y="311.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-CE624FA0-9F7E-4FF9-BF3E-C016D046A3BF" id="BPMNShape_sid-CE624FA0-9F7E-4FF9-BF3E-C016D046A3BF">
        <omgdc:Bounds height="80.0" width="100.0" x="210.0" y="285.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-705703CA-B642-435C-8393-B236EC3E964B" id="BPMNShape_sid-705703CA-B642-435C-8393-B236EC3E964B">
        <omgdc:Bounds height="28.0" width="28.0" x="320.0" y="164.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="sid-A4C68C9C-38C3-43A9-BB3F-83FABACA65F9" id="BPMNEdge_sid-A4C68C9C-38C3-43A9-BB3F-83FABACA65F9">
        <omgdi:waypoint x="310.0" y="325.0"></omgdi:waypoint>
        <omgdi:waypoint x="405.0" y="325.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="sid-799456B9-F667-4E98-A856-E1AA7B79F680" id="BPMNEdge_sid-799456B9-F667-4E98-A856-E1AA7B79F680">
        <omgdi:waypoint x="269.5937101033031" y="234.75947444214634"></omgdi:waypoint>
        <omgdi:waypoint x="269.5937101033031" y="259.3797372210732"></omgdi:waypoint>
        <omgdi:waypoint x="260.0" y="259.3797372210732"></omgdi:waypoint>
        <omgdi:waypoint x="260.0" y="285.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="sid-08270597-3D34-4CFD-BACF-CB95036CBC48" id="BPMNEdge_sid-08270597-3D34-4CFD-BACF-CB95036CBC48">
        <omgdi:waypoint x="130.0" y="178.0"></omgdi:waypoint>
        <omgdi:waypoint x="175.0" y="178.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="sid-010B8977-34F9-40F4-B694-D56D5BA34257" id="BPMNEdge_sid-010B8977-34F9-40F4-B694-D56D5BA34257">
        <omgdi:waypoint x="275.0" y="178.0"></omgdi:waypoint>
        <omgdi:waypoint x="320.0" y="178.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

Java代表

package com.softech.workflowengine.workflow.policyack.servicetask;

import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.JavaDelegate;

public class TimerClass implements JavaDelegate{

    @Override
    public void execute(DelegateExecution execution) {
        System.out.println(">> in TimerClass ");

    }
}

异常

07:56:03,977 [activiti-async-job-executor-thread-2] ERROR org.activiti.engine.impl.interceptor.CommandContext  - Error while closing command context
org.activiti.engine.ActivitiException: couldn't instantiate class com.softech.workflowengine.workflow.policyack.servicetask.TimerClass
    at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:137)
    at org.activiti.engine.impl.bpmn.helper.ClassDelegate.defaultInstantiateDelegate(ClassDelegate.java:306)
    at org.activiti.engine.impl.bpmn.helper.ClassDelegate.instantiateDelegate(ClassDelegate.java:295)
    at org.activiti.engine.impl.bpmn.helper.ClassDelegate.getActivityBehaviorInstance(ClassDelegate.java:273)
    at org.activiti.engine.impl.bpmn.helper.ClassDelegate.execute(ClassDelegate.java:217)
    at org.activiti.engine.impl.agenda.ContinueProcessOperation.executeActivityBehavior(ContinueProcessOperation.java:180)
    at org.activiti.engine.impl.agenda.ContinueProcessOperation.executeSynchronous(ContinueProcessOperation.java:131)
    at org.activiti.engine.impl.agenda.ContinueProcessOperation.continueThroughFlowNode(ContinueProcessOperation.java:89)
    at org.activiti.engine.impl.agenda.ContinueProcessOperation.run(ContinueProcessOperation.java:55)
    at org.activiti.engine.impl.interceptor.CommandInvoker.executeOperation(CommandInvoker.java:73)
    at org.activiti.engine.impl.interceptor.CommandInvoker.executeOperations(CommandInvoker.java:57)
    at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:42)
    at org.activiti.engine.impl.interceptor.TransactionContextInterceptor.execute(TransactionContextInterceptor.java:48)
    at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:63)
    at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
    at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
    at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:29)
    at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:44)
    at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:39)
    at org.activiti.engine.impl.asyncexecutor.ExecuteAsyncRunnable.executeJob(ExecuteAsyncRunnable.java:97)
    at org.activiti.engine.impl.asyncexecutor.ExecuteAsyncRunnable.run(ExecuteAsyncRunnable.java:75)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.activiti.engine.ActivitiClassLoadingException: Class not found: com.softech.workflowengine.workflow.policyack.servicetask.TimerClass
    at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:87)
    at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:134)
    ... 24 more
Caused by: java.lang.ClassNotFoundException: com.softech.workflowengine.workflow.policyack.servicetask.TimerClass
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1854)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1703)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:288)
    at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:68)
    ... 25 more
07:56:04,000 [activiti-async-job-executor-thread-2] ERROR org.activiti.engine.impl.asyncexecutor.ExecuteAsyncRunnable  - Job 130011 failed
org.activiti.engine.ActivitiException: couldn't instantiate class com.softech.workflowengine.workflow.policyack.servicetask.TimerClass
    at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:137)
    at org.activiti.engine.impl.bpmn.helper.ClassDelegate.defaultInstantiateDelegate(ClassDelegate.java:306)
    at org.activiti.engine.impl.bpmn.helper.ClassDelegate.instantiateDelegate(ClassDelegate.java:295)
    at org.activiti.engine.impl.bpmn.helper.ClassDelegate.getActivityBehaviorInstance(ClassDelegate.java:273)
    at org.activiti.engine.impl.bpmn.helper.ClassDelegate.execute(ClassDelegate.java:217)
    at org.activiti.engine.impl.agenda.ContinueProcessOperation.executeActivityBehavior(ContinueProcessOperation.java:180)
    at org.activiti.engine.impl.agenda.ContinueProcessOperation.executeSynchronous(ContinueProcessOperation.java:131)
    at org.activiti.engine.impl.agenda.ContinueProcessOperation.continueThroughFlowNode(ContinueProcessOperation.java:89)
    at org.activiti.engine.impl.agenda.ContinueProcessOperation.run(ContinueProcessOperation.java:55)
    at org.activiti.engine.impl.interceptor.CommandInvoker.executeOperation(CommandInvoker.java:73)
    at org.activiti.engine.impl.interceptor.CommandInvoker.executeOperations(CommandInvoker.java:57)
    at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:42)
    at org.activiti.engine.impl.interceptor.TransactionContextInterceptor.execute(TransactionContextInterceptor.java:48)
    at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:63)
    at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
    at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
    at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:29)
    at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:44)
    at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:39)
    at org.activiti.engine.impl.asyncexecutor.ExecuteAsyncRunnable.executeJob(ExecuteAsyncRunnable.java:97)
    at org.activiti.engine.impl.asyncexecutor.ExecuteAsyncRunnable.run(ExecuteAsyncRunnable.java:75)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Bean初始化

@Bean
    public SpringProcessEngineConfiguration processEngineConfiguration() throws Exception {
        SpringProcessEngineConfiguration engineConfiguration = new SpringProcessEngineConfiguration();

        engineConfiguration.setDataSource(dataSource);
        engineConfiguration.setTransactionManager(transactionManager);
        engineConfiguration.setDatabaseSchemaUpdate(Boolean.TRUE.toString());
        engineConfiguration.setAsyncExecutorActivate(true);
        return engineConfiguration;
    }

2 个答案:

答案 0 :(得分：0)

请注意，需要类路径中的类的线程是activiti-async-job-executor-thread-2]，这导致问题在于您在哪里运行作业执行程序？你如何确保该类在类路径中？

答案 1 :(得分：0)

计时器到期后需要执行的类必须在tomcat的类路径上（在tomcat的lib文件夹中）。有关更多参考，请参阅文章

https://dzone.com/articles/tutorial-devoxx-activiti-bpmn

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