Flowable啟動流程例項和查詢任務以及完成任務

不忘初心2021發表於2024-03-11

效果圖

因為流程刪除，所以需要

程式碼部分

package com.java;

import org.flowable.engine.ProcessEngine;
import org.flowable.engine.ProcessEngineConfiguration;
import org.flowable.engine.RepositoryService;
import org.flowable.engine.RuntimeService;
import org.flowable.engine.impl.cfg.StandaloneProcessEngineConfiguration;
import org.flowable.engine.repository.Deployment;
import org.flowable.engine.repository.ProcessDefinition;
import org.flowable.engine.runtime.ProcessInstance;
import org.junit.Before;
import org.junit.Test;

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

/**
 * @Description:
 * @Author: 喵星人
 * @Create: 2024/3/11 9:50
 */
public class HolidayRequest {

    ProcessEngineConfiguration cfg=null;

    @Before
    public void processTest(){
         cfg = new StandaloneProcessEngineConfiguration()
                .setJdbcUrl("jdbc:mysql://127.0.0.1:3307/public_workflow?useUnicode=true&characterEncoding=utf-8&useSSL=false")
                .setJdbcUsername("root")
                .setJdbcPassword("qweiop1992")
                .setJdbcDriver("com.mysql.jdbc.Driver")
                //表結構不存在就建立
                .setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
    }

    /**
     * 部署流程
     */
    @Test
    public void test001(){
        /**
         * 獲取物件
         */
        ProcessEngine processEngine = cfg.buildProcessEngine();
        RepositoryService service = processEngine.getRepositoryService();
        /**
         * 完成流程部署
         */
        Deployment deploy = service.createDeployment()
                .addClasspathResource("holiday-request.bpmn20.xml")
                .deploy();
        System.out.println("deploy.getId() = " + deploy.getId());
        System.out.println("deploy.getName() = " + deploy.getName());
    }

    /**
     * 查詢流程定義的資訊
     */
    @Test
    public void test002(){
        ProcessEngine processEngine = cfg.buildProcessEngine();
        RepositoryService service = processEngine.getRepositoryService();
        ProcessDefinition definition = service.createProcessDefinitionQuery()
                .deploymentId("1")
                .singleResult();
        System.out.println("definition.getDeploymentId() = " + definition.getDeploymentId());
        System.out.println("definition.getName() = " + definition.getName());
        System.out.println("definition.getDescription() = " + definition.getDescription());
    }

    /**
     * 刪除定義流程
     */
    @Test
    public void test003(){
        ProcessEngine processEngine = cfg.buildProcessEngine();
        RepositoryService service = processEngine.getRepositoryService();
        service.deleteDeployment("1");
        test002();
    }

    /**
     * 啟動流程例項
     */
    @Test
    public void test004() {
        ProcessEngine processEngine = cfg.buildProcessEngine();
        RuntimeService runtimeService = processEngine.getRuntimeService();
        /**
         * 構建流程變數
         */
        Map<String,Object> variable=new HashMap<String, Object>(16);
        variable.put("employee","李欣");
        variable.put("nrOfHolidays", 3);
        variable.put("description", "世界那麼大，我想去浪浪...");
        /**
         * 啟動流程例項
         */
        ProcessInstance request = runtimeService.startProcessInstanceByKey("holidayRequest", variable);
        System.out.println("request.getProcessDefinitionId() = " + request.getProcessDefinitionId());
        System.out.println("request.getActivityId() = " + request.getActivityId());
        System.out.println("request.getId() = " + request.getId());
    }




}

　　pom檔案

<?xml version="1.0" encoding="UTF-8"?>
<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.java</groupId>
    <artifactId>flowable -service</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>flowable-test</module>
    </modules>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.flowable</groupId>
            <artifactId>flowable-engine</artifactId>
            <version>6.7.2</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.21</version>
        </dependency>
        <!--mysql驅動5.6.17-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

　　流程檔案

<?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: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:flowable="http://flowable.org/bpmn"
             typeLanguage="http://www.w3.org/2001/XMLSchema"
             expressionLanguage="http://www.w3.org/1999/XPath"
             targetNamespace="http://www.flowable.org/processdef">

    <process id="holidayRequest" name="Holiday Request" isExecutable="true">

        <startEvent id="startEvent"/>
        <sequenceFlow sourceRef="startEvent" targetRef="approveTask"/>

        <userTask id="approveTask" name="Approve or reject request"/>
        <sequenceFlow sourceRef="approveTask" targetRef="decision"/>

        <exclusiveGateway id="decision"/>
        <sequenceFlow sourceRef="decision" targetRef="externalSystemCall">
            <conditionExpression xsi:type="tFormalExpression">
                <![CDATA[
          ${approved}
        ]]>
            </conditionExpression>
        </sequenceFlow>
        <sequenceFlow  sourceRef="decision" targetRef="sendRejectionMail">
            <conditionExpression xsi:type="tFormalExpression">
                <![CDATA[
          ${!approved}
        ]]>
            </conditionExpression>
        </sequenceFlow>

        <serviceTask id="externalSystemCall" name="Enter holidays in external system"
                     flowable:class="org.flowable.CallExternalSystemDelegate"/>
        <sequenceFlow sourceRef="externalSystemCall" targetRef="holidayApprovedTask"/>

        <userTask id="holidayApprovedTask" name="Holiday approved"/>
        <sequenceFlow sourceRef="holidayApprovedTask" targetRef="approveEnd"/>

        <serviceTask id="sendRejectionMail" name="Send out rejection email"
                     flowable:class="org.flowable.SendRejectionMail"/>
        <sequenceFlow sourceRef="sendRejectionMail" targetRef="rejectEnd"/>

        <endEvent id="approveEnd"/>

        <endEvent id="rejectEnd"/>

    </process>

</definitions>

　　日誌配置

log4j.rootLogger=DEBUG, CA

log4j.appender.CA=org.apache.log4j.ConsoleAppender
log4j.appender.CA.layout=org.apache.log4j.PatternLayout
log4j.appender.CA.layout.ConversionPattern= %d{hh:mm:ss,SSS} [%t] %-5p %c %x - %m%n

　　如果想要根據人來查詢任務，配置檔案需要修改

程式碼部分

/**
     * 任務查詢
     */
    @Test
    public void test005(){
        ProcessEngine processEngine = cfg.buildProcessEngine();
        TaskService taskService = processEngine.getTaskService();
        List<Task> tasks = taskService.createTaskQuery()
                .processDefinitionKey("holidayRequest")
                .taskAssignee("李欣")
                .list();
        for (Task task : tasks) {
            System.out.println("task.getProcessDefinitionId() = " + task.getProcessDefinitionId());
            System.out.println("task.getName() = " + task.getName());
            System.out.println("task.getAssignee() = " + task.getAssignee());
            System.out.println("task.getDescription() = " + task.getDescription());

        }
    }

　　效果圖

這裡需要注意的是每次流程檔案有修改都需要重新部署

完成任務效果圖

新增類

package org.flowable;

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

/**
 * @Description:
 * @Author: 喵星人
 * @Create: 2024/3/11 13:09
 */
public class SendRejectionMail implements JavaDelegate {
    public void execute(DelegateExecution delegateExecution) {
        System.out.println("審批被拒絕，發郵件來通知您....");
    }
}

　　新增測試類

/**
     * 任務完成
     */
    @Test
    public void test006(){
        ProcessEngine engine = cfg.buildProcessEngine();
        TaskService taskService = engine.getTaskService();
        Task task = taskService.createTaskQuery()
                .processDefinitionKey("holidayRequest")
                .taskAssignee("李欣")
                .singleResult();
        Map<String,Object> variable=new HashMap<String, Object>(16);
        variable.put("approved",false);
        taskService.complete(task.getId(),variable);
    }

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