Activiti7与SpringBoot整合开发

SpringBoot 整合 Activti7 的具体步骤大概包括以下4步:
1.添加 SpringBoot 整合 Activti7 的相关jar包
2.添加 SpringSecurity 安全框架的整合配置信息
3.使用 Activti7 新支持的类来实现工作流开发
ProcessRuntime 接口
TaskRuntime 接口
4.使用新的 API 实现工作流开发,主要包括
流程定义查询
启动流程实例
任务的查询
任务的完成
接下来进行代码的编写
一、创建maven项目,添加 SpringBoot 整合 Activti7 的相关jar包,编写pom.xml文件

<?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.my.withub</groupId>
    <artifactId>ActivitiSpringBoot</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/>
    </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>
        <!--连接mysql数据库-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.27</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!--activiti与springboot整合包-->
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-spring-boot-starter</artifactId>
            <version>7.0.0.Beta2</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

二、添加数据库连接相关配置信息,编写application.yml配置文件以及log4j.properties日志信息文件

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/activiti?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
    username : root
    password : 123456
# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=debug, CONSOLE, LOGFILE
# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE
# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

三、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。

import org.springframework.beans.factory.annotation.Autowired;
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 {

   @Autowired
   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");
       }

       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);
   }
}

四、添加 DemoApplicationConfig 类
在 Activiti7 官方下载的 Example 中可以找到 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。

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
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
@EnableWebSecurity
public class DemoApplicationConfiguration extends WebSecurityConfigurerAdapter {

    private Logger logger = LoggerFactory.getLogger(DemoApplicationConfiguration.class);
    @Override
    @Autowired
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(myUserDetailsService());
    }

    @Bean
    public UserDetailsService myUserDetailsService() {

        InMemoryUserDetailsManager inMemoryUserDetailsManager = new InMemoryUserDetailsManager();

        String[][] usersGroupsAndRoles = {
                {"salaboy", "password", "ROLE_ACTIVITI_USER", "GROUP_activitiTeam"},
                {"ryandawsonuk", "password", "ROLE_ACTIVITI_USER", "GROUP_activitiTeam"},
                {"erdemedeiros", "password", "ROLE_ACTIVITI_USER", "GROUP_activitiTeam"},
                {"other", "password", "ROLE_ACTIVITI_USER", "GROUP_otherTeam"},
                {"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;
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .csrf().disable()
                .authorizeRequests()
                .anyRequest()
                .authenticated()
                .and()
                .httpBasic();


    }

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

四、添加bpmn文件,为了能自动部署,我们需要将bpmn文件保存在resources/processes文件夹下
Activiti7与SpringBoot整合开发_第1张图片
绘制流程图,如下图所示:
Activiti7与SpringBoot整合开发_第2张图片
如下图所示,我们需要指定任务执行人
Activiti7与SpringBoot整合开发_第3张图片
Assignee:直接设置任务执行人
Candidate-user:设置候选用户,格式:zhangsan,lisi,wangwu, 使用这种格式依然要指定具体的用户信息
Candiate-Groups:特点不需要知道具体的用户信息,使用这种格式只需要知道组名就可以
为了方便我们这次使用Candiate-Groups这种方式,从DemoApplicationConfig 类我们可以看到目前有两个组
Activiti7与SpringBoot整合开发_第4张图片
这次使用activitiTeam这个组的人员来完成任务,如图所示,将每个节点的Candiate-Groups设置为activitiTeam
Activiti7与SpringBoot整合开发_第5张图片
五、编写测试类,实现 SpringBoot 与 Junit 整合测试 Activiti7 所需的各种 API

/**
 * SpringBoot与Junit整合,测试流程定义的相关操作
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class ActivitiTest {
    @Autowired
    private ProcessRuntime processRuntime; // 实现流程定义相关操作
    @Autowired
    private TaskRuntime taskRuntime; //任务相关操作的类
    @Autowired
    private SecurityUtil securityUtil; // springSecurity相关的工具类
 }

六、测试类中编写代码,查看流程定义

// 查看流程定义信息 流程部署在activiti7与springboot整合后,会自动部署,前提是必须将bpmn文件放到resource/processes目录下
   @Test
    public void queryProcessDefined(){
       // springsecurity的相关认证
       securityUtil.logInAs("salaboy");
        // 分页查询出流程定义信息
       Page<ProcessDefinition> processDefinitionPage = processRuntime.processDefinitions(Pageable.of(0, 10));
       System.out.println("可用的流程定义个数:"+processDefinitionPage.getTotalItems());
       // 得到当前部署的每一个流程定义的信息processDefinitionPage.getContent()
       for (Object pd : processDefinitionPage.getContent()) {
           System.out.println("流程定义:"+pd);
       }
   }

通过 ProcessRuntime 的方法,可以查看已经部署的流程定义信息。通过加入 Pageable.of()方法可以实现分页查询效果。
Activiti7与SpringBoot整合开发_第6张图片
同时,数据库会生成相关表,如下图所示:
Activiti7与SpringBoot整合开发_第7张图片
七、通过 ProcessRuntime 的 start()方法启动流程实例

// 启动流程实例
    @Test
   public void startProcessInstance(){
        // springsecurity的相关认证
        securityUtil.logInAs("salaboy");
        ProcessInstance processInstance = processRuntime.start(ProcessPayloadBuilder.start()
                .withProcessDefinitionKey("holiday").build());
        System.out.println("流程实例ID:"+processInstance.getId());
    }

运行程序,可以看到流程实例ID,如下图所示:
Activiti7与SpringBoot整合开发_第8张图片
查看数据库表,如下图所示:
Activiti7与SpringBoot整合开发_第9张图片
接下来,通过TaskRuntime 接口的 tasks()方法实现任务的查询,TaskRuntime 接口的 claim()方法实现任务拾取, TaskRuntime 接口的 complete()方法实现任务的完成

//查询任务并完成
    @Test
    public void queryTask(){
        // springsecurity的相关认证,相当于指定登录用户
        securityUtil.logInAs("ryandawsonuk");
        // 分页查询任务列表
        Page<Task> taskPage = taskRuntime.tasks(Pageable.of(0, 10));
        // 判断是否有任务
        if(taskPage.getTotalItems()>0){
            for (Task task : taskPage.getContent()) {
                System.out.println("任务:"+task);
                //拾取任务
                taskRuntime.claim(TaskPayloadBuilder.claim().withTaskId(task.getId()).build());
                // 完成任务
                taskRuntime.complete(TaskPayloadBuilder.complete().withTaskId(task.getId()).build());
            }
        }
        // 任务完成后再次查询
        taskPage = taskRuntime.tasks(Pageable.of(0, 10));
        // 判断是否有任务
        if(taskPage.getTotalItems()>0){
            for (Task task : taskPage.getContent()) {
                System.out.println("任务完成后的下一任务:"+task);
            }
        }
   }

运行程序,我们可以看到任务的相关信息,如下图所示:
Activiti7与SpringBoot整合开发_第10张图片
以此类推,我们可以完成一个完整的任务,这样我们就完成了Activiti7与SpringBoot整合开发,同时,我们也可以将SpringMVC也整合进来
首先,添加Controller类

/**
 * 控制器
 *  完成任务
 */
@RestController
public class ActivitiController {
    private Logger logger = LoggerFactory.getLogger(ActivitiController.class);
    @Autowired
    private ProcessRuntime processRuntime; // 实现流程定义相关操作
    @Autowired
    private TaskRuntime taskRuntime; //任务相关操作的类
    @Autowired
    private SecurityUtil securityUtil; // springSecurity相关的工具类
}

然后,实现任务查询拾取及完成操作

// 查询任务并完成
    @RequestMapping("/hello")
    public void testHello(){
        // springsecurity的相关认证,相当于指定登录用户
       // securityUtil.logInAs("ryandawsonuk");
        // 分页查询任务列表
        Page<Task> taskPage = taskRuntime.tasks(Pageable.of(0, 10));
        // 判断是否有任务
        if(taskPage.getTotalItems()>0){
            for (Task task : taskPage.getContent()) {
                System.out.println("任务:"+task);
                //拾取任务
                taskRuntime.claim(TaskPayloadBuilder.claim().withTaskId(task.getId()).build());
                // 完成任务
                taskRuntime.complete(TaskPayloadBuilder.complete().withTaskId(task.getId()).build());
            }
        }
        // 任务完成后再次查询
        taskPage = taskRuntime.tasks(Pageable.of(0, 10));
        // 判断是否有任务
        if(taskPage.getTotalItems()>0){
            for (Task task : taskPage.getContent()) {
                System.out.println("任务完成后的下一任务:"+task);
            }
        }
    }

接下来,编写SpringBoot启动类

@SpringBootApplication(exclude = SecurityAutoConfiguration.class)
public class Application {
    private Logger logger = LoggerFactory.getLogger(Application.class);
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

代码编写完成后,启动程序,访问Activiti7与SpringBoot整合开发_第11张图片
输入用户组里面的用户名及密码,如下图所示:Activiti7与SpringBoot整合开发_第12张图片
执行完成,我们可以看到相关任务信息如下:Activiti7与SpringBoot整合开发_第13张图片

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