QuickMan 手记 - Activiti 环境搭建

基础环境

环境搭建是一个无聊乏味的过程 ,这里使用 scoop 直接搭建完成 ,不知道 scoop 可以访问我的博客 .

当然 ,如果你的博客已经有了下面这些环境 ,不需要安装直接体验 .

scoop install java/oraclejdk8
scoop install idea-ultimate
scoop install eclipse-jee
scoop install extras/mysql56
scoop install maven

Mysql 这里启动就是最基本的命令 , mysqld .可能会提示你缺少一些 dll 文件 ,百度搜索解决即可 ,然后通过 mysql 连接 .

Maven 中央仓

下载好 Maven 复制一份 conf/setting.xml 到用户文件 ~/.m2 下 ,在 mirror 添加阿里中央仓 ,如下所示 .

    <!-- 阿里中央仓 -->
    <mirror>
      <id>ali</id>
      <mirrorOf>central</mirrorOf>
      <name>aliyun maven</name>
      <url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
    </mirror>

eclipse - 设计 BPM 工具

添加软件源 https://www.activiti.org/designer/update/

创建 Activiti 项目并在 main/resource 下创建流程图 .

设计一个流程图 ,这个有点技术的都应该知道 ,灰常简单 .我设计的流程图 ,截图如下 :

这个工具 idea

又爱又恨的 idea ,其实熟悉操作了就好了 .文件目录结构如下 :

----Leaveman
     |----apps
          |----activiti 学习 act 中 ,希望做出一个灵活调整的请销假系统 ;
          |----swagger 未完成

activiti.pom 配置文件如下 :

<?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">
    <parent>
        <artifactId>apps</artifactId>
        <groupId>ink.nodie.leaveman</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>activiti</artifactId>

    <dependencies>

        <!--添加 activiti 引擎 配置 resources 下的 activiti.xml-->
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-engine</artifactId>
            <version>6.0.0</version>
        </dependency>

        <!--添加 测试 配置 scope <test> -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <!--添加 日志 配置 resources 下的 activiti.xml-->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>

        <!--添加 guava 谷歌优质开发包-->
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>23.0</version>
        </dependency>

        <!--添加 内建演示数据库-->
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.4.196</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <!--局部制定 JDK 1.8 版本-->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

```\

快速编写一个基于定义文件的 HelloWorld 示例程序 .

```java
package ink.nodie.leaveman.demo;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngineConfiguration;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.DeploymentBuilder;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.runtime.ProcessInstance;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DemoMain {

    private static final Logger log = LoggerFactory.getLogger(DemoMain.class);

    public static void main(String[] args) {
        log.info("Start Process");

        //        构建引擎
        ProcessEngine processEngine = getProcessEngine();
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //        构建部署
        Deployment deployment = getDeployment(repositoryService);
        //        流程定义
        ProcessDefinition processDefinition = getProcessDefinition(repositoryService, deployment);
        //        启动流程
        processStart(processEngine, processDefinition);


        log.info("End Process");
    }

    private static void processStart(ProcessEngine processEngine, ProcessDefinition processDefinition) {
        RuntimeService runtimeService = processEngine.getRuntimeService();
        ProcessInstance processInstance = runtimeService.startProcessInstanceById(processDefinition.getId());
        log.info("[{}] processStart", processInstance.getProcessDefinitionKey());
    }

    private static ProcessDefinition getProcessDefinition(RepositoryService repositoryService, Deployment deployment) {
        String deploymentId = deployment.getId();
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deploymentId).singleResult();
        log.info("processDefinitionName [{}]", processDefinition.getName());
        return processDefinition;
    }

    private static Deployment getDeployment(RepositoryService repositoryService) {
        DeploymentBuilder builder = repositoryService.createDeployment();
        builder.addClasspathResource("GeneralLeaveProcess.bpmn20.xml");
        return builder.deploy();
    }

    private static ProcessEngine getProcessEngine() {
        ProcessEngineConfiguration cfg = ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration();
        ProcessEngine processEngine = cfg.buildProcessEngine();
        String name = processEngine.getName();
        String version = processEngine.VERSION;
        log.info("{} version:[{}]", name, version);
        return processEngine;
    }
}