前言
最近一直研究springboot，根据工作需求，工作流需要作为一个单独的微服务工程来提供给其他服务调用，现在简单的写下工作流（使用的activiti）微服务的搭建与简单使用
jdk：1.8
数据库：mysql 5.7
ide：eclipse
springboot：1.5.8
activiti：6.0.0
1.新建空白的maven微服务架构
新建maven项目的流程不在阐述，这里添加上activiti、myslq连接的依赖，只贴主要代码
pox.xml
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<project xmlns="http://maven.apache.org/pom/4.0.0" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation="http://maven.apache.org/pom/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelversion>4.0.0</modelversion>
<groupid>com.xxx</groupid>
<artifactid>xxx</artifactid>
<version>0.0.1-snapshot</version>
<properties>
<project.build.sourceencoding>utf-8</project.build.sourceencoding>
<java.version>1.8</java.version>
</properties>
<parent>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-parent</artifactid>
<version>1.5.8.release</version>
</parent>
<dependencies>
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-web</artifactid>
</dependency>
<dependency>
<groupid>org.activiti</groupid>
<artifactid>activiti-spring-boot-starter-basic</artifactid>
<version>6.0.0</version>
</dependency>
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-data-jpa</artifactid>
</dependency>
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-thymeleaf</artifactid>
</dependency>
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-web</artifactid>
</dependency>
<dependency>
<groupid>mysql</groupid>
<artifactid>mysql-connector-java</artifactid>
<scope>runtime</scope>
</dependency>
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-tomcat</artifactid>
</dependency>
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-test</artifactid>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-maven-plugin</artifactid>
</plugin>
</plugins>
</build>
</project>
确认服务是可用
2.连接服务名、服务端口、数据库配置
在resources目录下的application.properties（项目定位原因没有使用yaml，可根据自己项目使用）
spring.datasource.driver-class-name=com.mysql.jdbc.driver spring.datasource.url=jdbc:mysql://127.0.0.1:3306/activity?characterencoding=utf8&usessl=true spring.datasource.username=root spring.datasource.password=root spring.jpa.properties.hibernate.hbm2ddl.auto=update spring.jpa.show-sql=true server.port=8081 server.context-path=/activity server.session.timeout=10 server.tomcat.uri-encoding=utf-8
确认配置的数据库可用
3.main
import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
/**
* created by guo on 2017/11/15.
*/
@springbootapplication
public class activityapp
{
public static void main(string[] args)
{
springapplication.run(activityapp.class, args);
}
}
4.service及实现
service:
import org.activiti.engine.task.taskquery;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestmethod;
import org.springframework.web.bind.annotation.restcontroller;
@restcontroller
@requestmapping("/activityservice")
public interface activityconsumerservice {
/**
* 流程demo
* @return
*/
@requestmapping(value="/startactivitydemo",method=requestmethod.get)
public boolean startactivitydemo();
}
impl
import java.util.hashmap;
import java.util.map;
import org.activiti.engine.runtimeservice;
import org.activiti.engine.taskservice;
import org.activiti.engine.impl.persistence.entity.executionentity;
import org.activiti.engine.task.task;
import org.activiti.engine.task.taskquery;
import org.apache.commons.lang3.stringutils;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.service;
import com.hongguaninfo.activity.service.activityconsumerservice;
@service("activityservice")
public class activityconsumerserviceimpl implements activityconsumerservice {
@autowired
private runtimeservice runtimeservice;
@autowired
private taskservice taskservice;
@override
public boolean startactivitydemo() {
system.out.println("method startactivitydemo begin....");
map<string,object> map = new hashmap<string,object>();
map.put("apply","zhangsan");
map.put("approve","lisi");
//流程启动
executionentity pi1 = (executionentity) runtimeservice.startprocessinstancebykey("leave",map);
string processid = pi1.getid();
string taskid = pi1.gettasks().get(0).getid();
taskservice.complete(taskid, map);//完成第一步申请
task task = taskservice.createtaskquery().processinstanceid(processid).singleresult();
string taskid2 = task.getid();
map.put("pass", false);
taskservice.complete(taskid2, map);//驳回申请
system.out.println("method startactivitydemo end....");
return false;
}
}
5.bpmn
在resources目录下新建文件夹：processes，并在processes创建一个新的bpmn文件，如图
文件内容：
<?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" xmlns:dc="http://www.omg.org/spec/dd/20100524/dc" xmlns:di="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/testm1510735932336" id="m1510735932336" name="">
<process id="leave" isexecutable="true" isclosed="false" processtype="none">
<startevent id="_2" name="startevent"></startevent>
<endevent id="_3" name="endevent"></endevent>
<usertask id="approve" name="经理审批" activiti:assignee="${approve}"></usertask>
<exclusivegateway id="_5" name="exclusivegateway"></exclusivegateway>
<sequenceflow id="_6" sourceref="approve" targetref="_5"></sequenceflow>
<sequenceflow id="_7" name="通过" sourceref="_5" targetref="_3">
<conditionexpression xsi:type="tformalexpression"><![cdata[${pass}]]></conditionexpression>
</sequenceflow>
<usertask id="application" name="提交申请" activiti:assignee="${apply}"></usertask>
<sequenceflow id="_9" sourceref="_2" targetref="application"></sequenceflow>
<sequenceflow id="_10" sourceref="application" targetref="approve"></sequenceflow>
<usertask id="modify" name="修改申请" activiti:assignee="${apply}"></usertask>
<sequenceflow id="_12" name="不通过" sourceref="_5" targetref="modify">
<conditionexpression xsi:type="tformalexpression"><![cdata[${!pass}]]></conditionexpression>
</sequenceflow>
<sequenceflow id="_13" sourceref="modify" targetref="approve"></sequenceflow>
</process>
<bpmndi:bpmndiagram id="bpmndiagram_leave">
<bpmndi:bpmnplane bpmnelement="leave" id="bpmnplane_leave">
<bpmndi:bpmnshape bpmnelement="_2" id="bpmnshape__2">
<omgdc:bounds height="35.0" width="35.0" x="15.0" y="60.0"></omgdc:bounds>
</bpmndi:bpmnshape>
<bpmndi:bpmnshape bpmnelement="_3" id="bpmnshape__3">
<omgdc:bounds height="35.0" width="35.0" x="630.0" y="63.0"></omgdc:bounds>
</bpmndi:bpmnshape>
<bpmndi:bpmnshape bpmnelement="approve" id="bpmnshape_approve">
<omgdc:bounds height="55.0" width="85.0" x="315.0" y="50.0"></omgdc:bounds>
</bpmndi:bpmnshape>
<bpmndi:bpmnshape bpmnelement="_5" id="bpmnshape__5">
<omgdc:bounds height="40.0" width="40.0" x="505.0" y="60.0"></omgdc:bounds>
</bpmndi:bpmnshape>
<bpmndi:bpmnshape bpmnelement="application" id="bpmnshape_application">
<omgdc:bounds height="55.0" width="85.0" x="135.0" y="50.0"></omgdc:bounds>
</bpmndi:bpmnshape>
<bpmndi:bpmnshape bpmnelement="modify" id="bpmnshape_modify">
<omgdc:bounds height="55.0" width="85.0" x="315.0" y="150.0"></omgdc:bounds>
</bpmndi:bpmnshape>
<bpmndi:bpmnedge bpmnelement="_6" id="bpmnedge__6">
<omgdi:waypoint x="400.0" y="77.0"></omgdi:waypoint>
<omgdi:waypoint x="505.0" y="80.0"></omgdi:waypoint>
</bpmndi:bpmnedge>
<bpmndi:bpmnedge bpmnelement="_7" id="bpmnedge__7">
<omgdi:waypoint x="545.0" y="80.0"></omgdi:waypoint>
<omgdi:waypoint x="630.0" y="80.0"></omgdi:waypoint>
</bpmndi:bpmnedge>
<bpmndi:bpmnedge bpmnelement="_9" id="bpmnedge__9">
<omgdi:waypoint x="50.0" y="77.0"></omgdi:waypoint>
<omgdi:waypoint x="135.0" y="77.0"></omgdi:waypoint>
</bpmndi:bpmnedge>
<bpmndi:bpmnedge bpmnelement="_10" id="bpmnedge__10">
<omgdi:waypoint x="220.0" y="77.0"></omgdi:waypoint>
<omgdi:waypoint x="315.0" y="77.0"></omgdi:waypoint>
</bpmndi:bpmnedge>
<bpmndi:bpmnedge bpmnelement="_12" id="bpmnedge__12">
<omgdi:waypoint x="525.0" y="100.0"></omgdi:waypoint>
<omgdi:waypoint x="525.0" y="177.0"></omgdi:waypoint>
<omgdi:waypoint x="400.0" y="177.0"></omgdi:waypoint>
</bpmndi:bpmnedge>
<bpmndi:bpmnedge bpmnelement="_13" id="bpmnedge__13">
<omgdi:waypoint x="357.0" y="150.0"></omgdi:waypoint>
<omgdi:waypoint x="357.0" y="105.0"></omgdi:waypoint>
</bpmndi:bpmnedge>
</bpmndi:bpmnplane>
</bpmndi:bpmndiagram>
</definitions>
需要认知的问题：.项目启动的时候，activiti会自动在mysql中创建activiti相关表，不用像oracle那样需要手动去创建
6.验证
启动项目前，连接数据库，查看需要连接数据库中没有表，启动项目完成后，刷新数据库，activiti已经创建相关表，打开act_re_procdef表，流程数据已经存在，即流程已经部署成功。
用浏览器访问地址：http://127.0.0.1:8081/activity/activityservice/startactivitydemo
打印了预计的日志，没有报错信息，查看数据库中的act_ru_task表，发现刚才执行形成的数据，项目成功。
ps:只是简单的微服务，没有去写注册服务、网关配置、熔断机制等等，仅用于activiti与springboot的结合
=========================后续==========================
1.在项目单独作为一个引擎，本身不部署流程的时候，如果resources目录没有“processes”目录，启动项目报错--找不到processes目录。需要在配置文件中添加一下内容：
spring: activiti: ####校验流程文件，默认校验resources下的processes文件夹里的流程文件 check-process-definitions: false
即启动项目，不去校验processes。
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