Activiti7实战

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Activiti7与SpringBoot 整合开发

介绍

流程定义如下：
在这里插入图片描述
流程如下：申请人提出请假申请后，上级领导看到进行审批，如果时间超过三天，需要校长复审，三天之内直接人事存档。
进入开发工作，具体步骤如下：
1.添加 SpringBoot 整合 Activti7 的坐标；
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：
a.ProcessRuntime 接口；
b.TaskRuntime 接口。
4.使用新的 API 实现工作流开发，主要包括：
a.流程定义查询；
b.启动流程实例；
c.任务的查询；
d.任务的完成。

SpringBoot 整合 Activiti7 的配置

SpringBoot 与 Activiti7 整合开发，我们在工程的 pom.xml 文件中引入相关的依赖，具体依赖如下所示：

<?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.jsxy.test</groupId>
    <artifactId>activiti.springboot</artifactId>
    <version>1.0.0-SNAPSHOT</version>


    <!--activiti7与SpringBoot整合的相关依赖-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </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-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </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>

        <!-- https://mvnrepository.com/artifact/org.activiti/activiti-spring-boot-starter -->
        <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>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.27</version>
        </dependency>


    </dependencies>

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

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

SpringBoot 的 application.yml 文件配置

Activiti7 生成的表放到 Mysql 数据库中，需要在 springboot 的配置文件 application.yml中添加相关的配置

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/activiti_springboot_test?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
    username : root
    password : rootroot
    driver-class-name: com.mysql.jdbc.Driver
  activiti:
    db-history-used: true
    history-level: audit

添加 SpringSecurity 安全框架整合配置

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。
可以查看一下整合 SpringBoot 的依赖包，发现同时也将 SpringSecurity 的依赖包也添加进项目中了，如下：
在这里插入图片描述

添加 SecurityUtil 类

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);
    }
}

这个类可以从我们下载的 Activiti7 官方提供的 Example 中找到。

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。

/*
 * Copyright 2018 Alfresco, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
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();
    }
}

使用 SpringBoot 整合 Junit 方式测试新特性

创建测试类
@RunWith(SpringRunner.class)
@SpringBootTest
public class ActivitiTest{
 @Autowired
 private ProcessRuntime processRuntime;
 @Autowired
 private TaskRuntime taskRuntime;
 @Autowired
 private SecurityUtil securityUtil;
}
查看流程定义信息
/**
     * 查看流程定义
     */
    @Test
    public void contextLoads() {
        securityUtil.logInAs("salaboy");
        Page<ProcessDefinition> processDefinitionPage = processRuntime.processDefinitions(Pageable.of(0, 10));
        System.out.println("可用的流程定义数量：" + processDefinitionPage.getTotalItems());
        for (ProcessDefinition pd : processDefinitionPage.getContent()) {
            System.out.println("流程定义：" + pd);
        }
    }

通过 ProcessRuntime 的方法，我们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。

启动流程实例
/**
     * 启动流程实例
     */
    @Test
    public void testStartProcess() {
        securityUtil.logInAs("salaboy");
        ProcessInstance pi = processRuntime.start(ProcessPayloadBuilder.start().withProcessDefinitionKey("myProcess_1")
                .build());
        System.out.println("流程实例ID：" + pi.getId());
    }

启动流程实例，我们可以使用 ProcessRuntime 的 start()方法就可以实现流程实例的启动。

查询并完成任务
/**
     * 查询任务，并完成自己的任务
     */
    @Test
    public void testTask() {
        securityUtil.logInAs("erdemedeiros");
        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());
        }
    }

使用 TaskRuntime 接口的 tasks()方法实现任务的查询。
使用 TaskRuntime 接口的 claim()方法实现任务拾取。
使用 TaskRuntime 接口的 complete()方法实现任务的完成。
附启动类代码：


import org.activiti.api.process.runtime.connector.Connector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
import org.springframework.context.annotation.Bean;

@SpringBootApplication(exclude = SecurityAutoConfiguration.class)
public class Actviti7DemoApplication {
	private Logger logger = LoggerFactory.getLogger(Actviti7DemoApplication.class);



	public static void main(String[] args) {
		SpringApplication.run(Actviti7DemoApplication.class, args);
	}

	@Bean
	public Connector testConnector() {
		return integrationContext -> {
			logger.info("我被调用啦~~");
			return integrationContext;
		};
	}
}
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