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Activiti整合篇

1. 和Spring整合

1.1 添加相关的依赖

<?xml version="1.0" encoding="UTF-8"?>

    4.0.0

    com.bobo
    ActivitiDemo02Spring
    1.0-SNAPSHOT


    
        1.6.6
        1.2.12
    
    
        
            org.activiti
            activiti-engine
            7.0.0.Beta1
        
        
            org.activiti
            activiti-spring
            7.0.0.Beta1
        
        
            org.activiti
            activiti-bpmn-model
            7.0.0.Beta1
        
        
            org.activiti
            activiti-bpmn-converter
            7.0.0.Beta1
        
        
            org.activiti
            activiti-json-converter
            7.0.0.Beta1
        
        
            org.activiti
            activiti-bpmn-layout
            7.0.0.Beta1
            
                
                    com.github.jgraph
                    jgraphx
                
            
        
        
            org.activiti.cloud
            activiti-cloud-services-api
            7.0.0.Beta1
        
        
            aspectj
            aspectjweaver
            1.5.4
        
        
            mysql
            mysql-connector-java
            8.0.11
        
        
            junit
            junit
            4.12
        
        
            org.springframework
            spring-test
            5.0.7.RELEASE
        
        
        
            log4j
            log4j
            ${log4j.version}
        
        
            org.slf4j
            slf4j-api
            ${slf4j.version}
        
        
            org.slf4j
            slf4j-log4j12
            ${slf4j.version}
        
        
            org.slf4j
            slf4j-nop
            ${slf4j.version}
        
        
        
            org.mybatis
            mybatis
            3.4.5
        
        
            commons-dbcp
            commons-dbcp
            1.4
        
        
            org.projectlombok
            lombok
            1.18.12
        
    
    
        
            alfresco
            Activiti Releases
            https://artifacts.alfresco.com/nexus/content/repositories/activiti-releases/
            
                true
            
        
    
    
        
            
                org.apache.maven.plugins
                maven-surefire-plugin
                2.18.1
                
                    true
                
            
        
    

1.2 添加整合的配置文件

  添加一个Spring的配置文件，并在其中完成Activiti的整合操作

databaseSchemaUpdate的取值注意：

flase： 默认值。activiti在启动时，会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。（生产环境常用）
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。（开发时常用）
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）。（单元测试常用）
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）。

1.3 创建测试类测试

package com.bobo.test;

import org.activiti.engine.RepositoryService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:activiti-spring.xml"})
public class ActivitiTest {

    @Autowired
    private RepositoryService repositoryService;

    @Test
    public void test01(){
        System.out.println(repositoryService);
    }

}

  通过方法的执行我们能够发现相关的表结构在数据库中完成了创建，说明Activiti和Spring的整合成功。

2. 和SpringBoot的整合

  Activiti7发布正式版本之后，它和SpringBoot2.x已经完全整合开发了

2.1 添加相关的依赖

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.springframework.boot
            spring-boot-starter-test
            test
            
                
                    org.junit.vintage
                    junit-vintage-engine
                
            
        
        
            org.activiti
            activiti-spring-boot-starter
            7.0.0.Beta2
        
        
            mysql
            mysql-connector-java
        
        
            org.projectlombok
            lombok
        

2.2 修改配置文件

# 配置Spring的数据源
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql:///activiti?characterEncoding=utf-8&nullCatalogMeansCurrent=true&serverTimezone=UTC
spring.datasource.name=root
spring.datasource.password=123456

# activiti的配置
#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）
spring.activiti.database-schema-update=true
# 检测历史表是否存在， Activiti7中默认是没有开启数据库历史记录的，启动数据库历史记录
spring.activiti.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。
spring.activiti.history-level=full
# 校验流程文件，默认校验resouces下的 process 文件夹里的流程文件
spring.activiti.check-process-definitions=false

2.3 整合SpringSecurity

  因为Activiti7和SpringBoot整合后，默认情况下，集成了SpringSecurity安全框架，这样我们就要准备SpringSecurity的相关配置信息

  添加一个SpringSecurity的工具类

package com.bobo.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.context.annotation.ComponentScan;
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Activiti7官方提供的Example中找到。

  添加一个SpringSecurity的配置文件

package com.bobo.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 SpringSecurityConfiguration {
    private Logger logger = LoggerFactory.getLogger(SpringSecurityConfiguration.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 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();
    }
}

2.4 创建bpmn文件

  创建一个简单的bpmn文件，并设置任务的用户组，CandidateGroups，CandidateGroups中的内容要与在SpringSecurity的配置文件中配置的用户组的名称要保持一致，可以填写activitTeam或者otherTeam。这样填写的好处是，当不确定到底由谁来负责当前的任务的时候，只要是Groups内的用户都可以拾取这个任务

在这里插入图片描述

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

在这里插入图片描述

2.5 单元测试

package com.bobo;

import com.bobo.utils.SecurityUtil;
import org.activiti.api.process.model.ProcessDefinition;
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.ClaimTaskPayloadBuilder;
import org.activiti.api.task.model.builders.TaskPayloadBuilder;
import org.activiti.api.task.model.payloads.ClaimTaskPayload;
import org.activiti.api.task.runtime.TaskRuntime;
import org.activiti.engine.RepositoryService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class ActSpringbootApplicationTests {

    @Autowired
    private ProcessRuntime processRuntime;

    @Autowired
    private TaskRuntime taskRuntime;

    @Autowired
    private SecurityUtil securityUtil;

    @Autowired
    private RepositoryService repositoryService;

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

    /**
     * 查询流程的定义
     */
    @Test
    public void test02(){
        securityUtil.logInAs("system");
        Page processDefinitionPage =
                processRuntime.processDefinitions(Pageable.of(0, 10));
        System.out.println("可用的流程定义数量:" + processDefinitionPage.getTotalItems());
        for (ProcessDefinition processDefinition : processDefinitionPage.getContent()) {
            System.out.println("流程定义：" + processDefinition);
        }
    }

    /**
     * 部署流程
     */
    @Test
    public void test03(){
        repositoryService.createDeployment()
                .addClasspathResource("processes/my-evection.bpmn")
                .addClasspathResource("processes/my-evection.png")
                .name("出差申请单")
                .deploy();
    }

    /**
     * 启动流程实例
     */
    @Test
    public void test04(){
        securityUtil.logInAs("system");
        ProcessInstance processInstance = processRuntime.start(ProcessPayloadBuilder
                .start()
                .withProcessDefinitionKey("my-evection")
                .build()
        );
        System.out.println("流程实例id:" + processInstance.getId());
    }

    /**
     * 任务查询、拾取及完成操作
     */
    @Test
    public void test05(){
        securityUtil.logInAs("jack");
        Page tasks = taskRuntime.tasks(Pageable.of(0, 10));
        if(tasks != null && tasks.getTotalItems() > 0){
            for (Task task : tasks.getContent()) {
                // 拾取任务
                taskRuntime.claim(TaskPayloadBuilder
                        .claim()
                        .withTaskId(task.getId())
                        .build()
                );
                System.out.println("任务：" + task);
                taskRuntime.complete(TaskPayloadBuilder
                        .complete()
                        .withTaskId(task.getId())
                        .build()
                );
            }
        }
        Page taskPage2 = taskRuntime.tasks(Pageable.of(0,10));
        if(taskPage2 .getTotalItems() > 0){
            System.out.println("任务：" + taskPage2.getContent());
        }
    }

}

~好了整个Activiti7的相关内容就给大家介绍到这里，欢迎大家点赞关注加收藏哦! V_V