任务监听器用于在特定的任务相关事件发生时,执行自定义的Java逻辑或表达式
任务监听器只能用在UserTask上使用。String EVENTNAME_CREATE = “create”;创建):当任务已经创建,并且所有任务参数都已经设置时触发
String EVENTNAME_ASSIGNMENT = “assignment”;(指派):当任务已经指派给某人时触发。请注意:当流程执行到达用户任务时,create事件触发前,首先触发assignment事件。这看起来不是自然顺序,但是有实际原因的:当收到create事件时,我们通常希望查看任务的所有参数,包括办理人。
String EVENTNAME_COMPLETE = “complete”(完成):当任务已经完成,从运行时数据中删除前触发。
String EVENTNAME_DELETE = “delete”(删除):在任务即将被删除前触发。请注意当任务通过completeTask正常完成时也会触发
注意:assignment事件比create先执行。
TaskListener接口继承自BaseTaskListener 接口
public interface BaseTaskListener extends Serializable {
String EVENTNAME_CREATE = "create";
String EVENTNAME_ASSIGNMENT = "assignment";
String EVENTNAME_COMPLETE = "complete";
String EVENTNAME_DELETE = "delete";
/**
* Not an actual event, used as a marker-value for {@link BaseTaskListener}s that should be called for all events, including {@link #EVENTNAME_CREATE} , {@link #EVENTNAME_ASSIGNMENT} and
* {@link #EVENTNAME_COMPLETE} and {@link #EVENTNAME_DELETE}.
*/
String EVENTNAME_ALL_EVENTS = "all";
}
TaskListener接口定义,只有notify方法,传入DelegateTask
public interface TaskListener extends BaseTaskListener {
void notify(DelegateTask delegateTask);
}
我们在监听方法中,能够拿到DelegateTask对象,因此,我们要熟悉这个对象的相关方法
package org.activiti.engine.delegate;
import java.util.Collection;
import java.util.Date;
import java.util.Set;
import org.activiti.engine.ActivitiObjectNotFoundException;
import org.activiti.engine.task.DelegationState;
import org.activiti.engine.task.IdentityLink;
import org.activiti.engine.task.IdentityLinkType;
/**
* @author Joram Barrez
*/
public interface DelegateTask extends VariableScope {
/** DB id of the task. */
String getId();
/** Name or title of the task. */
String getName();
/** Change the name of the task. */
void setName(String name);
/** Free text description of the task. */
String getDescription();
/** Change the description of the task */
void setDescription(String description);
/** indication of how important/urgent this task is with a number between
* 0 and 100 where higher values mean a higher priority and lower values mean
* lower priority: [0..19] lowest, [20..39] low, [40..59] normal, [60..79] high
* [80..100] highest */
int getPriority();
/** indication of how important/urgent this task is with a number between
* 0 and 100 where higher values mean a higher priority and lower values mean
* lower priority: [0..19] lowest, [20..39] low, [40..59] normal, [60..79] high
* [80..100] highest */
void setPriority(int priority);
/** Reference to the process instance or null if it is not related to a process instance. */
String getProcessInstanceId();
/** Reference to the path of execution or null if it is not related to a process instance. */
String getExecutionId();
/** Reference to the process definition or null if it is not related to a process. */
String getProcessDefinitionId();
/** The date/time when this task was created */
Date getCreateTime();
/** The id of the activity in the process defining this task or null if this is not related to a process */
String getTaskDefinitionKey();
/** Indicated whether this task is suspended or not. */
boolean isSuspended();
/** The tenant identifier of this task */
String getTenantId();
/** The form key for the user task */
String getFormKey();
/** Change the form key of the task */
void setFormKey(String formKey);
/** Returns the execution currently at the task. */
DelegateExecution getExecution();
/** Returns the event name which triggered the task listener to fire for this task. */
String getEventName();
/** The current {@link org.activiti.engine.task.DelegationState} for this task. */
DelegationState getDelegationState();
/** Adds the given user as a candidate user to this task. */
void addCandidateUser(String userId);
/** Adds multiple users as candidate user to this task. */
void addCandidateUsers(Collection<String> candidateUsers);
/** Adds the given group as candidate group to this task */
void addCandidateGroup(String groupId);
/** Adds multiple groups as candidate group to this task. */
void addCandidateGroups(Collection<String> candidateGroups);
/** The {@link User.getId() userId} of the person responsible for this task. */
String getOwner();
/** The {@link User.getId() userId} of the person responsible for this task.*/
void setOwner(String owner);
/** The {@link User.getId() userId} of the person to which this task is delegated. */
String getAssignee();
/** The {@link User.getId() userId} of the person to which this task is delegated. */
void setAssignee(String assignee);
/** Due date of the task. */
Date getDueDate();
/** Change due date of the task. */
void setDueDate(Date dueDate);
/** The category of the task. This is an optional field and allows to 'tag' tasks as belonging to a certain category. */
String getCategory();
/** Change the category of the task. This is an optional field and allows to 'tag' tasks as belonging to a certain category. */
void setCategory(String category);
/**
* Involves a user with a task. The type of identity link is defined by the given identityLinkType.
* @param userId id of the user involve, cannot be null.
* @param identityLinkType type of identityLink, cannot be null (@see {@link IdentityLinkType}).
* @throws ActivitiObjectNotFoundException when the task or user doesn't exist.
*/
void addUserIdentityLink(String userId, String identityLinkType);
/**
* Involves a group with group task. The type of identityLink is defined by the given identityLink.
* @param groupId id of the group to involve, cannot be null.
* @param identityLinkType type of identity, cannot be null (@see {@link IdentityLinkType}).
* @throws ActivitiObjectNotFoundException when the task or group doesn't exist.
*/
void addGroupIdentityLink(String groupId, String identityLinkType);
/**
* Convenience shorthand for {@link #deleteUserIdentityLink(String, String)}; with type {@link IdentityLinkType#CANDIDATE}
* @param userId id of the user to use as candidate, cannot be null.
* @throws ActivitiObjectNotFoundException when the task or user doesn't exist.
*/
void deleteCandidateUser(String userId);
/**
* Convenience shorthand for {@link #deleteGroupIdentityLink(String, String, String)}; with type {@link IdentityLinkType#CANDIDATE}
* @param groupId id of the group to use as candidate, cannot be null.
* @throws ActivitiObjectNotFoundException when the task or group doesn't exist.
*/
void deleteCandidateGroup(String groupId);
/**
* Removes the association between a user and a task for the given identityLinkType.
* @param userId id of the user involve, cannot be null.
* @param identityLinkType type of identityLink, cannot be null (@see {@link IdentityLinkType}).
* @throws ActivitiObjectNotFoundException when the task or user doesn't exist.
*/
void deleteUserIdentityLink(String userId, String identityLinkType);
/**
* Removes the association between a group and a task for the given identityLinkType.
* @param groupId id of the group to involve, cannot be null.
* @param identityLinkType type of identity, cannot be null (@see {@link IdentityLinkType}).
* @throws ActivitiObjectNotFoundException when the task or group doesn't exist.
*/
void deleteGroupIdentityLink(String groupId, String identityLinkType);
/**
* Retrieves the candidate users and groups associated with the task.
* @return set of {@link IdentityLink}s of type {@link IdentityLinkType#CANDIDATE}.
*/
Set<IdentityLink> getCandidates();
}

给经理审批节点设置如下任务监听器

import lombok.extern.slf4j.Slf4j;
import org.activiti.engine.delegate.DelegateTask;
import org.activiti.engine.delegate.TaskListener;
/**
* 任务监听器用于在特定的任务相关事件发生时,执行自定义的Java逻辑或表达式
*
* 任务监听器支持下列属性:
* event(事件)(必填):任务监听器将被调用的任务事件类型。可用的事件有:
* create(创建):当任务已经创建,并且所有任务参数都已经设置时触发。
* assignment(指派):当任务已经指派给某人时触发。请注意:当流程执行到达用户任务时,create事件触发前,首先触发
* assignment事件。这看起来不是自然顺序,但是有实际原因的:当收到create事件时,我们通常希望查看任务的所有参数,包括
* 办理人。
* complete(完成):当任务已经完成,从运行时数据中删除前触发。
* delete(删除):在任务即将被删除前触发。请注意当任务通过completeTask正常完成时也会触发
*
* class:需要调用的代理类。这个类必须实现 org.activiti.engine.delegate.TaskListener 接口
*
*
* expression:(不能与class属性一起使用):指定在事件发生时要执行的表达式。可以为被调用的对象传递 DelegateTask 对象与事件名(使用 task.eventName )作为参数
*
*
*
* delegateExpression:可以指定一个能够解析为 TaskListener 接口实现类对象的表达式。与服务任务类似
*
*
*/
@Slf4j
public class SiteReportUserTaskListener implements TaskListener {
/*
启动流程时候(按顺序)
收到事件通知: assignment
收到事件通知: create
完成经理审批任务时候(按顺序)
收到事件通知: complete
收到事件通知: delete
*/
@Override
public void notify(DelegateTask delegateTask) {
log.info("收到事件通知: {}", delegateTask.getEventName());
}
}
使用activiti:taskListener元素的expression属性来指定监听器

如下图给经理审批节点添加任务监听器,设置Expression为${taskListenerExpression.execute(task)}

注意:这个的TaskListenerExpression 需要实现Serializable接口。
@Slf4j
public class TaskListenerExpression implements Serializable {
public void execute(DelegateTask delegateTask) {
log.info("收到事件通知: {}", delegateTask.getEventName());
}
}
先部署该流程
然后,发起1个流程时,注意发起流程时,这里需要设置taskListenerExpression,然后它会收到assignment、create
ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
// 发起流程 需要通过 runtimeService来实现
RuntimeService runtimeService = engine.getRuntimeService();
HashMap<String, Object> variables = new HashMap<String, Object>();
// 在流程执行到某个阶段,或者启动流程实例的时候,用下面代码调用
HashMap<String, Object> variables = new HashMap<String, Object>();
variables.put("taskListenerExpression", new TaskListenerExpression());
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("listener1", variables);
然后,部门经理完成该任务,它会收到complete、delete
在上面,我们在开启流程时,自己new了1个TaskListenerExpression,并且把它放入了流程变量中。在spring中,我们只需要将此bean定义在spring容器中即可(此处案例定义在activiti.cfg.xml中),在启动流程时,就不需要把它放入流程变量中了,就可以启动流程(注意:一定要把这个bean定义在容器中,否则启动流程时会报错,因为此时不能解析表达式了。当任务执行到该节点的时候,会直接调用该spring管理的bean)。
委托表达式 和 表达式区别:
委托表达式需要实现TaskListener和序列化接口
xml中直接写实现类的变量名,不用写方法名称,默认调取接口方法名

设置经理审批节点,当经理审批后,触发表达式的执行

需要同时实现TaskListener接口 和 Serializable接口
@Slf4j
public class TaskListenerDelegateExpression implements TaskListener, Serializable {
@Override
public void notify(DelegateTask delegateTask) {
log.info("TaskListenerDelegateExpression#收到事件通知: {}", delegateTask.getEventName());
}
}
先部署该流程
然后,发起1个流程时,注意发起流程时,这里需要设置taskListenerDelegateExpression
ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
// 发起流程 需要通过 runtimeService来实现
RuntimeService runtimeService = engine.getRuntimeService();
HashMap<String, Object> variables = new HashMap<String, Object>();
variables.put("taskListenerDelegateExpression", new TaskListenerDelegateExpression());
// 通过流程定义ID来启动流程 返回的是流程实例对象
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("listener1", variables);
System.out.println("processInstance.getId() = " + processInstance.getId());
System.out.println("processInstance.getDeploymentId() = " + processInstance.getDeploymentId());
System.out.println("processInstance.getDescription() = " + processInstance.getDescription());
然后,部门经理完成该任务,委托表达式执行,它会收到complete
ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
TaskService taskService = engine.getTaskService();
List<Task> list = taskService.createTaskQuery().taskAssignee("zhangsan").list();
Map<String, Object> map = new HashMap<>();
Task task = list.get(0);
// 完成经理审批
taskService.complete(task.getId(), map);
下面这种只能用类这种方式来给类中的某个属性赋值

@Slf4j
public class SiteReportUserTaskListener implements TaskListener {
/* 注意:这里写的类型!否则可能会报错 */
private Expression fieldNameA;
/*
完成经理审批任务时候
收到事件通知: complete
*/
@Override
public void notify(DelegateTask delegateTask) {
log.info("收到事件通知: {}, {}", delegateTask.getEventName(), fieldNameA);
}
}
通过多次设置字段的值可以得知:fieldNameA取值优先级: 第1个 字符串>第3个 字符串> 第二个 表达式
任务节点完成的时候,需要一些复杂业务,(比如当前节点完成的时候,需要调用我们的jms消息系统发送消息)。
任务流转到当前的节点的时候,需要监控当前任务节点的一些信息或者其他的业务信息。
当前的任务节点分配处理人的时候,需要触发自定义的一些业务。
ExecutionListener 继承自BaseExecutionListener 接口
/*
Callback interface to be notified of execution events like
starting a process instance,
ending an activity instance,
taking a transition.
*/
public interface BaseExecutionListener extends Serializable {
String EVENTNAME_START = "start";
String EVENTNAME_END = "end";
String EVENTNAME_TAKE = "take";
}
ExecutionListener 接口如下
public interface ExecutionListener extends BaseExecutionListener {
void notify(DelegateExecution execution);
}
public interface DelegateExecution extends VariableScope {
/**
* Unique id of this path of execution that can be used as a handle to provide external signals back into the engine after wait states.
*/
String getId();
/** Reference to the overall process instance */
String getProcessInstanceId();
/**
* The 'root' process instance. When using call activity for example, the processInstance
* set will not always be the root. This method returns the topmost process instance.
*/
String getRootProcessInstanceId();
/**
* Will contain the event name in case this execution is passed in for an {@link ExecutionListener}.
*/
String getEventName();
/**
* Sets the current event (typically when execution an {@link ExecutionListener}).
*/
void setEventName(String eventName);
/**
* The business key for the process instance this execution is associated with.
*/
String getProcessInstanceBusinessKey();
/**
* The process definition key for the process instance this execution is associated with.
*/
String getProcessDefinitionId();
/**
* Gets the id of the parent of this execution. If null, the execution represents a process-instance.
*/
String getParentId();
/**
* Gets the id of the calling execution. If not null, the execution is part of a subprocess.
*/
String getSuperExecutionId();
/**
* Gets the id of the current activity.
*/
String getCurrentActivityId();
/**
* Returns the tenant id, if any is set before on the process definition or process instance.
*/
String getTenantId();
/**
* The BPMN element where the execution currently is at.
*/
FlowElement getCurrentFlowElement();
/**
* Change the current BPMN element the execution is at.
*/
void setCurrentFlowElement(FlowElement flowElement);
/**
* Returns the {@link ActivitiListener} instance matching an {@link ExecutionListener}
* if currently an execution listener is being execution.
* Returns null otherwise.
*/
ActivitiListener getCurrentActivitiListener();
/**
* Called when an {@link ExecutionListener} is being executed.
*/
void setCurrentActivitiListener(ActivitiListener currentActivitiListener);
/* Execution management */
/**
* returns the parent of this execution, or null if there no parent.
*/
DelegateExecution getParent();
/**
* returns the list of execution of which this execution the parent of.
*/
List<? extends DelegateExecution> getExecutions();
/* State management */
/**
* makes this execution active or inactive.
*/
void setActive(boolean isActive);
/**
* returns whether this execution is currently active.
*/
boolean isActive();
/**
* returns whether this execution has ended or not.
*/
boolean isEnded();
/**
* changes the concurrent indicator on this execution.
*/
void setConcurrent(boolean isConcurrent);
/**
* returns whether this execution is concurrent or not.
*/
boolean isConcurrent();
/**
* returns whether this execution is a process instance or not.
*/
boolean isProcessInstanceType();
/**
* Inactivates this execution. This is useful for example in a join: the execution still exists, but it is not longer active.
*/
void inactivate();
/**
* Returns whether this execution is a scope.
*/
boolean isScope();
/**
* Changes whether this execution is a scope or not.
*/
void setScope(boolean isScope);
/**
* Returns whather this execution is the root of a multi instance execution.
*/
boolean isMultiInstanceRoot();
/**
* Changes whether this execution is a multi instance root or not.
* @param isMultiInstanceRoot
*/
void setMultiInstanceRoot(boolean isMultiInstanceRoot);
}
使用方法与上面大致相同,只不过ExecutionListener还可以设置在开始和结束节点、连线上。
执行监听器与任务监听器的基本原理和使用方法。当流程途径连线或者节点的时候,会触发对应的事件类型。执行监听器与任务监听器在生产中经常会用在几个方面:
任务监听器顾名思义是监听任务的。任务监听器的生命周期如下图所示,会经历assignment、create、complete、delete。当流程引擎触发这四种事件类型时,对应的任务监听器会捕获其事件类型,再按照监听器的处理逻辑进行处理。

执行监听器则监听流程的所有节点和连线。主要有start、end、take事件。其中节点有start、end两种事件,而连线则有take事件。下图是执行监听器的生命周期:

接下来通过代码去演示监听器效果。 首先我们创建一个执行监听器的类:
package listener;
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.ExecutionListener;
public class MyExecutionListener implements ExecutionListener {
public void notify(DelegateExecution execution) throws Exception {
System.out.println("============executionListener start============");
String eventName = execution.getEventName();
String currentActivitiId = execution.getCurrentActivityId();
System.out.println("事件名称:" + eventName);
System.out.println("ActivitiId:" + currentActivitiId);
System.out.println("============executionListener end============");
}
}
自定义执行监听器需要实现ExecutionListener接口,并且实现notify方法。这里我们打印对应的事件和活动节点id
接下来创建一个自定任务监听器:
package listener;
import org.activiti.engine.delegate.DelegateTask;
import org.activiti.engine.delegate.TaskListener;
public class MyTaskListener implements TaskListener{
public void notify(DelegateTask delegateTask) {
System.out.println("============TaskListener start============");
String taskDefinitionKey = delegateTask.getTaskDefinitionKey();
String eventName = delegateTask.getEventName();
System.out.println("事件名称:" + eventName);
System.out.println("taskDefinitionKey:" + taskDefinitionKey);
System.out.println("============TaskListener end============");
}
}
自定义任务监听器需要实现TaskListener接口,并且实现notify方法。这里我们打印对应的事件和任务节点键值(即bpmn图里userTask的id)。
之后新建一个bpmn图:
<?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="listenerBpmProcess" name="My process" isExecutable="true">
<startEvent id="startevent1" name="Start"></startEvent>
<userTask id="usertask1" name="myTask1" activiti:assignee="张三">
<extensionElements>
<activiti:executionListener event="start" class="listener.MyExecutionListener"></activiti:executionListener>
<activiti:executionListener event="end" class="listener.MyExecutionListener"></activiti:executionListener>
<activiti:taskListener event="all" class="listener.MyTaskListener"></activiti:taskListener>
</extensionElements>
</userTask>
<endEvent id="endevent1" name="End"></endEvent>
<sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
<sequenceFlow id="flow2" sourceRef="usertask1" targetRef="endevent1"></sequenceFlow>
</process>
<bpmndi:BPMNDiagram id="BPMNDiagram_listenerBpmProcess">
<bpmndi:BPMNPlane bpmnElement="listenerBpmProcess" id="BPMNPlane_listenerBpmProcess">
<bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
<omgdc:Bounds height="41.0" width="35.0" x="505.0" y="40.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
<omgdc:Bounds height="55.0" width="105.0" x="470.0" y="150.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
<omgdc:Bounds height="35.0" width="35.0" x="505.0" y="240.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
<omgdi:waypoint x="522.0" y="81.0"></omgdi:waypoint>
<omgdi:waypoint x="522.0" y="150.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
<omgdi:waypoint x="522.0" y="205.0"></omgdi:waypoint>
<omgdi:waypoint x="522.0" y="240.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</definitions>
这里我们给userTask1添加了执行监听器和任务监听器。部署bpmn图后,我们观察流程运转时监听器的触发时机和作用,启动流程:
public void startProcessById() {
RuntimeService runtimeService = pe.getRuntimeService();
ProcessInstance pi = runtimeService.startProcessInstanceById("listenerBpmProcess:1:4");
}
流程启动后,从开始节点运转到userTask1节点,观察控制台输出:
============executionListener start============
事件名称:start
ActivitiId:usertask1
============executionListener end============
============TaskListener start============
事件名称:assignment
taskDefinitionKey:usertask1
============TaskListener end============
============TaskListener start============
事件名称:create
taskDefinitionKey:usertask1
============TaskListener end============
可以看到流程走到userTask1节点时,首先触发start事件,调用我们自定义的执行监听器,随后触发assignment和create事件,执行自定义任务监听器的内容。注意这里是先触发assignment进行人员分配,再触发create事件,与一般的认知有些差异。
接下来通过taskService的complete方法完成userTask1节点上流程的提交,观察控制台输出:
============TaskListener start============
事件名称:complete
taskDefinitionKey:usertask1
============TaskListener end============
============TaskListener start============
事件名称:delete
taskDefinitionKey:usertask1
============TaskListener end============
============executionListener start============
事件名称:end
ActivitiId:usertask1
============executionListener end============
可以看到userTask1节点提交的时候,首先触发complete事件再触发delete事件,最后触发end事件。
以上就是执行监听器与任务监听器的基本使用方式。实际工程中,由于流程节点十分多,并且流程和业务常常需要进行微调,通常是不会在bpmn图上逐个节点添加监听器的,往往是在解析bpmn对象期间利用对象解析器动态添加监听器。
画如下的流程图,
给开始节点、经理审批节点、开始节点到经理审批节点之间的连线上都添加MyExecutionListener,3种类型包括start、task、end都加上。
给经理审批节点加上MyTaskListener,4种类型包括assignment、create、complete、delete都加上。因为TaskListener只能添加给userTask节点

bpmn文件如下:
<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="listener2" name="listener2" isExecutable="true">
<documentation>listener2documentation>
<startEvent id="startEvent1">
<extensionElements>
<activiti:executionListener event="start" class="com.zzhua.listener.MyExecutionListener">activiti:executionListener>
<activiti:executionListener event="end" class="com.zzhua.listener.MyExecutionListener">activiti:executionListener>
<activiti:executionListener event="take" class="com.zzhua.listener.MyExecutionListener">activiti:executionListener>
extensionElements>
startEvent>
<userTask id="pmNode" name="经理审批" activiti:assignee="zhangsan">
<extensionElements>
<activiti:executionListener event="start" class="com.zzhua.listener.MyExecutionListener">activiti:executionListener>
<activiti:executionListener event="end" class="com.zzhua.listener.MyExecutionListener">activiti:executionListener>
<activiti:executionListener event="take" class="com.zzhua.listener.MyExecutionListener">activiti:executionListener>
<activiti:taskListener event="create" class="com.zzhua.listener.MyTaskListener">activiti:taskListener>
<activiti:taskListener event="assignment" class="com.zzhua.listener.MyTaskListener">activiti:taskListener>
<activiti:taskListener event="complete" class="com.zzhua.listener.MyTaskListener">activiti:taskListener>
<activiti:taskListener event="delete" class="com.zzhua.listener.MyTaskListener">activiti:taskListener>
<modeler:initiator-can-complete xmlns:modeler="http://activiti.com/modeler">modeler:initiator-can-complete>
extensionElements>
userTask>
<userTask id="HrNode" name="人事审批" activiti:assignee="lisi">
<extensionElements>
<modeler:initiator-can-complete xmlns:modeler="http://activiti.com/modeler">modeler:initiator-can-complete>
extensionElements>
userTask>
<endEvent id="sid-95094C86-3D9A-4AF0-9575-26BF6EE37AF0">endEvent>
<sequenceFlow id="sid-CF295D96-0BAD-44EF-8461-8D0CEA5D60EF" sourceRef="HrNode" targetRef="sid-95094C86-3D9A-4AF0-9575-26BF6EE37AF0">sequenceFlow>
<sequenceFlow id="sid-D3BAAF86-675D-49CC-A831-1403C117D883" sourceRef="startEvent1" targetRef="pmNode">
<extensionElements>
<activiti:executionListener event="start" class="com.zzhua.listener.MyExecutionListener">activiti:executionListener>
<activiti:executionListener event="end" class="com.zzhua.listener.MyExecutionListener">activiti:executionListener>
<activiti:executionListener event="take" class="com.zzhua.listener.MyExecutionListener">activiti:executionListener>
extensionElements>
sequenceFlow>
<sequenceFlow id="sid-6A9C7D82-BFA1-449D-A280-649024CDA85A" sourceRef="pmNode" targetRef="HrNode">sequenceFlow>
process>
<bpmndi:BPMNDiagram id="BPMNDiagram_listener2">
...
bpmndi:BPMNDiagram>
definitions>
先部署流程,然后开启1个流程,输出如下,这说明开始节点:没有take,只有start和end,连线:有start、take、end,userTask:有start,然后顺序是任务监听器的assignment、create
============executionListener start============
事件名称:start
ActivitiId:startEvent1
============executionListener end============
============executionListener start============
事件名称:end
ActivitiId:startEvent1
============executionListener end============
============executionListener start============
事件名称:start
ActivitiId:sid-D3BAAF86-675D-49CC-A831-1403C117D883
============executionListener end============
============executionListener start============
事件名称:take
ActivitiId:sid-D3BAAF86-675D-49CC-A831-1403C117D883
============executionListener end============
============executionListener start============
事件名称:end
ActivitiId:sid-D3BAAF86-675D-49CC-A831-1403C117D883
============executionListener end============
============executionListener start============
事件名称:start
ActivitiId:pmNode
============executionListener end============
============TaskListener start============
事件名称:assignment
taskDefinitionKey:pmNode
============TaskListener end============
============TaskListener start============
事件名称:create
taskDefinitionKey:pmNode
============TaskListener end============
完成经理审批节点时的,输入如下,先是任务监听器的complete,然后是delete
============TaskListener start============
事件名称:complete
taskDefinitionKey:pmNode
============TaskListener end============
============TaskListener start============
事件名称:delete
taskDefinitionKey:pmNode
============TaskListener end============
============executionListener start============
事件名称:end
ActivitiId:pmNode
============executionListener end============
在流程运转的过程中,流程引擎会发出很多不同的事件,前面的文章,我们通过执行监听器和任务监听器捕获到对应事件并进行处理。除了这两个监听器以外,activiti从5.15版开始加入了全局事件监听器,这样很多重复的监听器就不需要在每个活动上去绑定。
添加全局监听器有几种方式,包括 通过流程引擎文件方式进行配置、通过流程文档进行配置、动态添加全局事件监听器等方式,下面分别展示这几种方法:

直接设置SpringProcessEngineConfiguration#eventListeners属性,即可
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/activiti2?characterEncoding=utf-8&nullCatalogMeansCurrent=true&serverTimezone=Asia/Shanghai&useSSL=false"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
<property name="maxActive" value="3"/>
<property name="maxIdle" value="1"/>
bean>
<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
<property name="dataSource" ref="dataSource"/>
<property name="transactionManager" ref="transactionManager"/>
<property name="databaseSchemaUpdate" value="true"/>
<property name="eventListeners">
<list>
<bean class="com.zzhua.listener.acti.MyCfgActivitiEventListener"/>
list>
property>
<property name="typedEventListeners">
<map>
<entry key="TASK_CREATED">
<list>
<bean class="com.zzhua.listener.acti.MyCfgTypeActivitiEventListener"/>
list>
entry>
<entry key="PROCESS_COMPLETED">
<list>
<bean class="com.zzhua.listener.acti.MyCfgTypeActivitiEventListener"/>
list>
entry>
map>
property>
bean>
<bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean">
<property name="processEngineConfiguration" ref="processEngineConfiguration"/>
bean>
<bean id="repositoryService" factory-bean="processEngine" factory-method="getRepositoryService"/>
<bean id="runtimeService" factory-bean="processEngine" factory-method="getRuntimeService"/>
<bean id="taskService" factory-bean="processEngine" factory-method="getTaskService"/>
<bean id="historyService" factory-bean="processEngine" factory-method="getHistoryService"/>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
bean>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="save*" propagation="REQUIRED"/>
<tx:method name="insert*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
<tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
tx:attributes>
tx:advice>
beans>
public class MyCfgActivitiEventListener implements ActivitiEventListener {
@Override
public void onEvent(ActivitiEvent event) {
System.out.println("【cfg-eventName】:" + event.getType().name());
}
@Override
public boolean isFailOnException() {
return false;
}
}
直接设置SpringProcessEngineConfiguration#typedEventListeners属性,即可,配置同上,这种方式可以为指定的事件类型添加一批监听器,这种属于动态添加,在spring或springboot中,就直接在ProcessEngineConfiguration创建时添加监听器即可。
如果需要禁用,可以设置ProcessEngineConfiguration#enableEventDispatcher为false来关闭事件派发器。
事实上,在ProcessEngineConfiguration上有很多可以设置的属性,后面可以探究下。
public class MyCfgTypeActivitiEventListener implements ActivitiEventListener {
@Override
public void onEvent(ActivitiEvent event) {
System.out.println("【cfg-type-eventName】:" + event.getType().name());
}
@Override
public boolean isFailOnException() {
return false;
}
}
在bpmn画图工具中设置

public class MyBpmnActivitiEventListener implements ActivitiEventListener {
@Override
public void onEvent(ActivitiEvent event) {
System.out.println("【bpmn-eventName】:" + event.getType().name());
}
@Override
public boolean isFailOnException() {
return false;
}
}
使用RuntimeService#addEventListener添加,也可以
public class MyRuActivitiEventListener implements ActivitiEventListener {
@Override
public void onEvent(ActivitiEvent event) {
System.out.println("【ru-eventName】:" + event.getType().name());
}
@Override
public boolean isFailOnException() {
return false;
}
}