Spring + Activiti + drools integration of leave examples

Business rules are like this (no real meaning, just do demo demo)


If the total number of days of absence is equal to 3 days, general manager approval is required, otherwise the general manager approval is not required


If the time of absence is less than 3 days, the total number of days leave is equal to the number of days of leave +2
Otherwise, the total number of days leave is equal to the number of times to leave +5

The calculation logic of the total number of leave is given to drools processing

Create a new MAVEN project with the following directory structure:

One: Join maven dependencies:

<properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>< Activiti.version>5.17.0</activiti.version><drools.version>5.6.0.final</drools.version> </properties><dependencies><dependency><groupId>org.drools</groupId>< Artifactid>drools-core</artifactid><version>${drools.version}</version></dependency ><dependency><groupid>org.drools</groupid><artifactid>drools-compiler</ Artifactid><version>${drools.version}</version></dependency><dependency><groupid >org.activiti</groupid><artifactid>activiti-engine</artifactid><version>${ activiti.version}</version><scope>provided</scope></dependency><dependency>< Groupid>org.activiti</groupid><artifactid>activiti-bpmn-layout</artifactid><version >${activiti.version}</version><scope>provided</scope></dependency><dependency><groupid>org.activiti</groupid>< Artifactid>activiti-spring</artifactid><version>${activiti.version}</version><scope >provided</scope></dependency><dependency><groupId>org.postgresql</groupId> <artifactid>postgresql</artifactid><version>9.4-1201-jdbc41</version></dependency ></dependencies>

Drools seems unable to use the 6.x version of

Spring configuration file:

<?xml version= "1.0" encoding= "UTF-8"? ><beans xmlns= "Http://www.springframework.org/schema/beans" xmlns:    Xsi= "Http://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation= "Http://www.springframework.org/schema/beans Http://www.springframework.org/schema/beans/spring-beans.xsd "><bean id=" DataSource "class=" Org.springframework.jdbc.datasource.SimpleDriverDataSource "><property name=" Driverclass "value=" Org.postgresql.Driver "/><property name=" url "value=" jdbc:postgresql://127.0.0.1/activiti17 "/>< Property name= "username" value= "admin"/><property name= "password" value= "root"/></bean><bean id= " TransactionManager "class=" Org.springframework.jdbc.datasource.DataSourceTransactionManager "><property Name= "DataSource" ref= "DataSource"/></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= "Custompostdeployers" ><list> <bean class= "Org.activiti.engine.impl.rules.RulesDeployer"/&G        T </list> </property><!--<property name= "deploymentresources" value= "CLASSPATH*:/BPMN/*.BPMN"/ >--></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=" Managementservice "factory-beAn= "Processengine" factory-method= "Getmanagementservice"/></beans> 

Ppleave.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=" Leave "name=" Leave Approval "isexecutable=" true "><startevent id=" startevent1 "Name=" Start "></startevent><endevent id=" Endevent1 "name=" End "></endevent><usertask id=" Usertask1 "name=" department manager approval "></usertask><businessruletask id=" Businessruletask1 "name=" Days Judging "Activiti: rulevariablesinput= "${leave}" activiti:rules= "Leave1,leave2" activiti:resultvariable= "Reason" ></ Businessruletask><serviCetask id= "Servicetask1" name= "Get Variable" activiti:class= "Com.lala.service.DroolsService" ></serviceTask>< Usertask id= "Usertask2" name= "HR Approval" ></usertask><sequenceflow id= "Flow1" sourceref= "Startevent1" targetref= "Usertask1" ></sequenceflow><sequenceflow id= "Flow2" sourceref= "Usertask1" targetref= " Businessruletask1 "></sequenceflow><sequenceflow id=" flow3 "sourceref=" Businessruletask1 "targetref=" Servicetask1 "></sequenceflow><usertask id=" Usertask3 "Name=" general manager approval "></userTask>< Sequenceflow id= "flow4" sourceref= "Servicetask1" targetref= "Usertask3" ><conditionexpression xsi:type= " Tformalexpression "><! [Cdata[${reason[0].total >= 10}]]></conditionexpression></sequenceflow><sequenceflow id=] Flow5 "sourceref=" Servicetask1 "targetref=" Usertask2 "><conditionexpression xsi:type=" Tformalexpression "> <! [Cdata[${reason[0].total < 10}]]></conditionexpression></sequenceflow><seqUenceflow id= "flow6" sourceref= "Usertask3" targetref= "Usertask2" ></sequenceflow><sequenceflow id= " Flow7 "sourceref=" Usertask2 "targetref=" Endevent1 "></sequenceFlow></process></definitions>

The flowchart is as follows:

Drools Rule file: PRODUCT.DRL

Package Com.product;import com.lala.bean.leave;rule ' leave1 '    when    u:leave (Day < 3);    Then    u.settotal (U.getday () + 2), endrule "Leave2"    when    u:leave (Day >= 3);    Then    u.settotal (U.getday () + 5); end

Fact object:

Package Com.lala.bean;import Java.io.serializable;public class Leave implements serializable{private static final long Serialversionuid = 1l;private String name;private Integer Day; The current day of leave private Integer total = 0;//number of days to leave public Leave (String name, Integer day) {this.name = Name;this.day = day;} Public Integer GetDay () {return day;} public void Setday (Integer day) {this.day = day;} Public String GetName () {return name;} public void SetName (String name) {this.name = name;} Public Integer Gettotal () {return total;} public void Settotal (Integer total) {this.total = total;} Public String toString () {return "[name=" +name+ ", day=" +day+ ", total=" +total+ "]";}}

Package Com.lala.service;import Org.activiti.engine.delegate.delegateexecution;import Org.activiti.engine.delegate.javadelegate;public class Droolsservice implements Javadelegate{public void Execute ( Delegateexecution execution) throws Exception{system.out.println ("++++++++++++++++++++++++++++++++++++++"); System.out.println (execution.getvariable ("Reason")); System.out.println ("++++++++++++++++++++++++++++++++++++++");}}

Test:

Package Com.lala.spring;import Java.util.hashmap;import Java.util.list;import java.util.map;import Org.activiti.engine.repositoryservice;import Org.activiti.engine.runtimeservice;import Org.activiti.engine.taskservice;import Org.activiti.engine.repository.deploymentbuilder;import Org.activiti.engine.runtime.processinstance;import Org.activiti.engine.task.task;import Org.springframework.context.applicationcontext;import Org.springframework.context.support.classpathxmlapplicationcontext;import Com.lala.bean.leave;public class Main { static void Run (ApplicationContext context) throws exception{Repositoryservice Repositoryservice = (repositoryservice)        Context.getbean ("Repositoryservice");    /** * Note here: You must deploy the DRL file together/Deploymentbuilder deploy = Repositoryservice.createdeployment ();    Deploy.addclasspathresource ("RULE/PRODUCT.DRL");    Deploy.addclasspathresource ("BPMN/PPLEAVE.BPMN");        Deploy.deploy (); Runtimeservice Runtimeservice = (runtimeservice) context.gEtbean ("Runtimeservice");        ProcessInstance pi = Runtimeservice.startprocessinstancebykey ("Leave");        Taskservice Taskservice = (taskservice) context.getbean ("Taskservice");          map<string, object> vars = new hashmap<string, object> ();            Vars.put ("Leave", New Leave ("Bai Zhantong", 12)); /** * Current Task */list<task> tasks = Taskservice.createtaskquery (). Processinstanceid (Pi.getid ()). List    ();    for (Task task:tasks) {System.out.println (Task.getid () + "," + task.getname ());    Taskservice.complete (Task.getid (), VARs);    }/** * Next task * * tasks = Taskservice.createtaskquery (). Processinstanceid (Pi.getid ()). List ();    for (Task task:tasks) {System.out.println (Task.getid () + "," + task.getname ()); }} public static void Main (string[] args) throws Exception {Classpathxmlapplicationcontext context = new CLASSP    Athxmlapplicationcontext ("Applicationcontext.xml");    Run (context); Context.cloSE (); }}

Operation Result:

When the number of days to leave is less than 3 days, the output:

5009, department manager approval
++++++++++++++++++++++++++++++++++++++
[[Name= Bai Zhantong, day=2,total=4]]
++++++++++++++++++++++++++++++++++++++
5019, HR approval

Otherwise, the output:

7509, department manager approval
++++++++++++++++++++++++++++++++++++++
[[Name= Bai Zhantong, day=22,total=27]]
++++++++++++++++++++++++++++++++++++++
7519, general manager approval

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Spring + Activiti + drools integration of leave examples