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 能够访问个人博客 .

固然 ,若是你的博客已经有了下面这些环境 ,不须要安装直接体验 .

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 .可能会提示你缺乏一些 dll 文件 ,百度搜索解决便可 ,而后经过 mysql 链接 .

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 ,以下所示 .

<!-- 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/

建立 Activiti 项目并在 main/resource 下建立流程图 .

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 ,截图以下 :

这个工具 idea

又爱又恨的 idea ,其实熟悉操做了就行了 .文件目录结构以下 :

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

activiti.pom 配置文件以下 :

```java

apps
ink.nodie.leaveman
1.0-SNAPSHOT

4.0.0

<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>

```
快速编写一个基于定义文件的 HelloWorld 示例程序 .

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;
    }
}