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13、Activiti7与SpringBoot整合开发

小熊同学大约 5 分钟

Activiti7发布正式版之后,它与SpringBoot2.x已经完全支持整合开发。

1、SpringBoot整合Activiti7的配置

为了能够实现SpringBoot与Activiti7整合开发,首先我们要引入相关的依赖支持。

在工程的pom.xml文件中引入相关的依赖,其中activiti的依赖是:activiti-spring-boot-starter。

具体依赖如下所示:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.0.RELEASE</version>
</parent>
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <dependency>
        <groupId>org.activiti</groupId>
        <artifactId>activiti-spring-boot-starter</artifactId>
        <version>7.0.0.Beta2</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.29</version>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

通过该pom.xml文件所导入的坐标,我们就可以实现activiti7与Springboot整合。

2、SpringBoot的application.yml文件配置

为了能够实现Activiti7生成的表放到Mysql数据库中,需要在配置文件application.yml中添加相关的配置

注意:activiti7默认没有开启数据库历史记录,需要手动配置开启

spring:
  datasource:
    url: jdbc:mysql:///activiti?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
  activiti:
    #1.flase:默认值。activiti在启动时,对比数据库表中保存的版本,如果没有表或者版本不匹配,将抛出异常
    #2.true: activiti会对数据库中所有表进行更新操作。如果表不存在,则自动创建
    #3.create_drop: 在activiti启动时创建表,在关闭时删除表(必须手动关闭引擎,才能删除表)
    #4.drop-create: 在activiti启动时删除原来的旧表,然后在创建新表(不需要手动关闭引擎)
    database-schema-update: true
    #检测历史表是否存在 activiti7默认没有开启数据库历史记录 启动数据库历史记录
    db-history-used: true
    #记录历史等级 可配置的历史级别有none, activity, audit, full
    #none:不保存任何的历史数据,因此,在流程执行过程中,这是最高效的。
    #activity:级别高于none,保存流程实例与流程行为,其他数据不保存。
    #audit:除activity级别会保存的数据外,还会保存全部的流程任务及其属性。audit为history的默认值。
    #full:保存历史数据的最高级别,除了会保存audit级别的数据外,还会保存其他全部流程相关的细节数据,包括一些流程参数等。
    history-level: full
    #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

3、编写启动类

package com.itheima;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ActApplication {
    public static void main(String[] args) {
        SpringApplication.run(ActApplication.class,args);
    }
}

4、添加SpringSecurity安全框架整合配置

因为Activiti7与SpringBoot整合后,默认情况下,集成了SpringSecurity安全框架,这样我们就要去准备SpringSecurity整合进来的相关用户权限配置信息。

SpringBoot的依赖包已经将SpringSecurity的依赖包也添加进项目中。

1、添加SecurityUtil类

为了能够快速实现SpringSecurity安全框架的配置,所添加的一个组件。

package com.itheima.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.context.SecurityContextImpl;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.stereotype.Component;

import java.util.Collection;


@Component
public class SecurityUtil {
    private Logger logger = LoggerFactory.getLogger(SecurityUtil.class);

     @Autowired
     @Qualifier("myUserDetailsService")
     private UserDetailsService userDetailsService;
 
    public void logInAs(String username) {
     UserDetails user = userDetailsService.loadUserByUsername(username);

     if (user == null) {
         throw new IllegalStateException("User " + username + " doesn't exist, please provide a valid user");
     }
     logger.info("> Logged in as: " + username);

     SecurityContextHolder.setContext(
             new SecurityContextImpl(
                     new Authentication() {
                         @Override
                         public Collection<? extends GrantedAuthority> getAuthorities() {
                             return user.getAuthorities();
                         }
                         @Override
                         public Object getCredentials() {
                             return user.getPassword();
                         }
                         @Override
                         public Object getDetails() {
                             return user;
                         }
                         @Override
                         public Object getPrincipal() {
                             return user;
                         }
                         @Override
                         public boolean isAuthenticated() {
                             return true;
                         }
                         @Override
                         public void setAuthenticated(boolean isAuthenticated) throws IllegalArgumentException { }
                         @Override
                         public String getName() {
                             return user.getUsername();
                         }
     }));
     org.activiti.engine.impl.identity.Authentication.setAuthenticatedUserId(username);
 }
  }

这个类可以从我们下载的Activiti7官方提供的Example中找到。

2、添加DemoApplicationConfig类

在Activiti7官方下载的Example中找到DemoApplicationConfig类,它的作用是为了实现SpringSecurity框架的用户权限的配置,这样我们就可以在系统中使用用户权限信息。

本次项目中基本是在文件中定义出来的用户信息,当然也可以是数据库中查询的用户权限信息。

后面处理流程时用到的任务负责人,需要添加在这里

package com.itheima.config;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

@Configuration
public class DemoApplicationConfiguration {
    private Logger logger = LoggerFactory.getLogger(DemoApplicationConfiguration.class);
     @Bean
     public UserDetailsService myUserDetailsService() {
         InMemoryUserDetailsManager inMemoryUserDetailsManager = new InMemoryUserDetailsManager();
         //这里添加用户,后面处理流程时用到的任务负责人,需要添加在这里
         String[][] usersGroupsAndRoles = {
                 {"jack", "password", "ROLE_ACTIVITI_USER", "GROUP_activitiTeam"},
                 {"rose", "password", "ROLE_ACTIVITI_USER", "GROUP_activitiTeam"},
                 {"tom", "password", "ROLE_ACTIVITI_USER", "GROUP_activitiTeam"},
                 {"other", "password", "ROLE_ACTIVITI_USER", "GROUP_otherTeam"},
                 {"system", "password", "ROLE_ACTIVITI_USER"},
                 {"admin", "password", "ROLE_ACTIVITI_ADMIN"},
         };

         for (String[] user : usersGroupsAndRoles) {
             List<String> authoritiesStrings = Arrays.asList(Arrays.copyOfRange(user, 2, user.length));
             logger.info("> Registering new user: " + user[0] + " with the following Authorities[" + authoritiesStrings + "]");
             inMemoryUserDetailsManager.createUser(new User(user[0], passwordEncoder().encode(user[1]),
                     authoritiesStrings.stream().map(s -> new SimpleGrantedAuthority(s)).collect(Collectors.toList())));
         }

         return inMemoryUserDetailsManager;
     }
     @Bean
     public PasswordEncoder passwordEncoder() {
         return new BCryptPasswordEncoder();
     }
}

5、创建Bpmn文件

Activiti7可以自动部署流程,前提是在resources目录下,创建一个新的目录processes,用来放置bpmn文件。

创建一个简单的Bpmn流程文件,并设置任务的用户组Candidate Groups。

Candidate Groups中的内容与上面DemoApplicationConfiguration类中出现的用户组名称要保持一致,可以填写:activitiTeam 或者 otherTeam。

这样填写的好处:当不确定到底由谁来负责当前任务的时候,只要是Groups内的用户都可以拾取这个任务

6、使用Junit方式测试

package com.itheima.test;

import com.itheima.utils.SecurityUtil;
import org.activiti.api.process.model.ProcessInstance;
import org.activiti.api.process.model.builders.ProcessPayloadBuilder;
import org.activiti.api.process.runtime.ProcessRuntime;
import org.activiti.api.runtime.shared.query.Page;
import org.activiti.api.runtime.shared.query.Pageable;
import org.activiti.api.task.model.Task;
import org.activiti.api.task.model.builders.TaskPayloadBuilder;
import org.activiti.api.task.runtime.TaskRuntime;
import org.activiti.engine.repository.ProcessDefinition;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
 public class Actviti7DemoApplicationTests {
     @Autowired
     private ProcessRuntime processRuntime;
     @Autowired
     private TaskRuntime taskRuntime;
     @Autowired
     private SecurityUtil securityUtil;

    @Test
    public void testActBoot(){
        System.out.println(taskRuntime);
    }

    /**
     * 查看流程定义
     */
    @Test
    public void contextLoads() {
        securityUtil.logInAs("system");
        Page<org.activiti.api.process.model.ProcessDefinition> processDefinitionPage =
                processRuntime.processDefinitions(Pageable.of(0, 10));
        System.out.println("可用的流程定义数量:" + processDefinitionPage.getTotalItems());
        for (org.activiti.api.process.model.ProcessDefinition pd : processDefinitionPage.getContent()) {
            System.out.println("流程定义:" + pd);
        }
    }


    /**
     * 启动流程实例
     */
    @Test
    public void testStartProcess() {
        securityUtil.logInAs("system");
        ProcessInstance pi = processRuntime.start(ProcessPayloadBuilder.
                start().
                withProcessDefinitionKey("myProcess").
                build());
        System.out.println("流程实例ID:" + pi.getId());
    }


    /**
     **查询任务,并完成自己的任务
     **/
    @Test
    public void testTask() {
        securityUtil.logInAs("jack");
        Page<Task> taskPage=taskRuntime.tasks(Pageable.of(0,10));
        if (taskPage.getTotalItems()>0){
            for (Task task:taskPage.getContent()){
                taskRuntime.claim(TaskPayloadBuilder.
                        claim().
                        withTaskId(task.getId()).build());
                System.out.println("任务:"+task);
                taskRuntime.complete(TaskPayloadBuilder.
                        complete().
                        withTaskId(task.getId()).build());
            }
        }
        Page<Task> taskPage2=taskRuntime.tasks(Pageable.of*(0,10));
        if (taskPage2.getTotalItems()>0){
            System.out.println("任务:"+taskPage2.getContent());
        }
    }
}