Activiti7与Spring、Spring Boot整合开发

Activiti整合Spring

一、Activiti与Spring整合开发

1.1 Activiti与Spring整合的配置

1)、在pom.xml文件引入坐标

如下

<properties><slf4j.version>1.6.6</slf4j.version><log4j.version>1.2.12</log4j.version>
</properties>
<dependencies><dependency><groupId>org.activiti</groupId><artifactId>activiti-engine</artifactId><version>7.0.0.Beta1</version></dependency><dependency><groupId>org.activiti</groupId><artifactId>activiti-spring</artifactId><version>7.0.0.Beta1</version></dependency><dependency><groupId>org.activiti</groupId><artifactId>activiti-bpmn-model</artifactId><version>7.0.0.Beta1</version></dependency><dependency><groupId>org.activiti</groupId><artifactId>activiti-bpmn-converter</artifactId><version>7.0.0.Beta1</version></dependency><dependency><groupId>org.activiti</groupId><artifactId>activiti-json-converter</artifactId><version>7.0.0.Beta1</version></dependency><dependency><groupId>org.activiti</groupId><artifactId>activiti-bpmn-layout</artifactId><version>7.0.0.Beta1</version></dependency><dependency><groupId>org.activiti.cloud</groupId><artifactId>activiti-cloud-services-api</artifactId><version>7.0.0.Beta1</version></dependency><dependency><groupId>aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.5.4</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.40</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>5.0.7.RELEASE</version></dependency><!-- log start --><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>${log4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-nop</artifactId><version>${slf4j.version}</version></dependency><!-- log end --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.4.5</version></dependency><dependency><groupId>commons-dbcp</groupId><artifactId>commons-dbcp</artifactId><version>1.4</version></dependency>
</dependencies>
<repositories><repository><id>alfresco</id><name>Activiti Releases</name><url>https://artifacts.alfresco.com/nexus/content/repositories/activiti-releases/</url><releases><enabled>true</enabled></releases></repository>
</repositories>

在Activiti中核心类的是ProcessEngine流程引擎，与Spring整合就是让Spring来管理ProcessEngine

通过org.activiti.spring.SpringProcessEngineConfiguration 与Spring整合方式来创建ProcessEngine对象。

创建spring与activiti的整合配置文件：activiti-spring.xml（名称不固定）

2)、创建activiti-spring.xml

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd"><!-- 数据源 --><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"><property name="driverClassName" value="com.mysql.jdbc.Driver"/><property name="url" value="jdbc:mysql://localhost:3306/activiti"/><property name="username" value="root"/><property name="password" value="123456"/><property name="maxActive" value="3"/><property name="maxIdle" value="1"/></bean><!-- 工作流引擎配置bean --><bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration"><!-- 数据源 --><property name="dataSource" ref="dataSource"/><!-- 使用spring事务管理器 --><property name="transactionManager" ref="transactionManager"/><!-- 数据库策略 --><property name="databaseSchemaUpdate" value="drop-create"/></bean><!-- 流程引擎 --><bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean"><property name="processEngineConfiguration" ref="processEngineConfiguration"/></bean><!-- 资源服务service --><bean id="repositoryService" factory-bean="processEngine" factory-method="getRepositoryService"/><!-- 流程运行service --><bean id="runtimeService" factory-bean="processEngine"  factory-method="getRuntimeService"/><!-- 任务管理service --><bean id="taskService" factory-bean="processEngine" factory-method="getTaskService"/><!-- 历史管理service --><bean id="historyService" factory-bean="processEngine" factory-method="getHistoryService"/><!-- 事务管理器 --><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource"/></bean><!-- 通知 --><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><!-- 传播行为 --><tx:method name="save*" propagation="REQUIRED"/><tx:method name="insert*" propagation="REQUIRED"/><tx:method name="delete*" propagation="REQUIRED"/><tx:method name="update*" propagation="REQUIRED"/><tx:method name="find*" propagation="SUPPORTS" read-only="true"/><tx:method name="get*" propagation="SUPPORTS" read-only="true"/></tx:attributes></tx:advice><!-- 切面，根据具体项目修改切点配置<aop:config proxy-target-class="true"><aop:advisor advice-ref="txAdvice"pointcut="execution(*com.itheima.service.impl..(..))"/></aop:config>-->
</beans>

databaseSchemaUpdate的取值内容：

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）。

1.2 测试Activiti与Spring整合

1）、测试代码

/**测试activiti与spring整合是否成功
**/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:activiti-spring.xml")public class ActivitiTest {@Autowiredprivate RepositoryService repositoryService;@Testpublic void test01(){System.out.println("部署对象:"+repositoryService);}}

2）、执行流程分析

下面我们一起来分析Activiti与Spring整合加载的过程。

1、加载activiti-spring.xml配置文件

2、加载SpringProcessEngineConfiguration对象，这个对象它需要依赖注入dataSource对象和transactionManager对象。

3、加载ProcessEngineFactoryBean工厂来创建ProcessEngine对象，而ProcessEngineFactoryBean工厂又需要依赖注入processEngineConfiguration对象。

4、processEngine对象来负责创建我们的Service对象，从而简化Activiti的开发过程。

二、Activiti7与SpringBoot整合开发

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

2.1 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。

2.2 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=GMTusername: rootpassword: 123456driver-class-name: com.mysql.jdbc.Driveractiviti:#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

2.3 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);}
}

2.4 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。

2.4.1 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() {@Overridepublic Collection<? extends GrantedAuthority> getAuthorities() {return user.getAuthorities();}@Overridepublic Object getCredentials() {return user.getPassword();}@Overridepublic Object getDetails() {return user;}@Overridepublic Object getPrincipal() {return user;}@Overridepublic boolean isAuthenticated() {return true;}@Overridepublic void setAuthenticated(boolean isAuthenticated) throws IllegalArgumentException { }@Overridepublic 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。

2.4.2 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);@Beanpublic 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;}@Beanpublic PasswordEncoder passwordEncoder() {return new BCryptPasswordEncoder();}
}

2.5 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

2.6 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)
@SpringBootTestpublic class Actviti7DemoApplicationTests {@Autowiredprivate ProcessRuntime processRuntime;@Autowiredprivate TaskRuntime taskRuntime;@Autowiredprivate SecurityUtil securityUtil;@Testpublic void testActBoot(){System.out.println(taskRuntime);}/*** 查看流程定义*/@Testpublic 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*/@Testpublic 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**/@Testpublic 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());}}
}