Activiti7整合SpringBoot(十二)

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。
所以，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：

   <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>8.0.15</version>
        </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 springboot 的配置文件 application.yml
中添加相关的配置

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/activiti?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
    username : root
    password : 123456
    driver-class-name: com.mysql.jdbc.Driver

3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。
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：

3.1 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。

package com.topcheer.activiti;

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。

3.2 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。

/*
 * 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.
 */

package com.topcheer.activiti;

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();
    }
}

4 使用 SpringBoot 整合 Junit 方式测试新特性

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

    //
//    /**
//     * 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);
        }
    }
    //
//    /**
//     * 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());
        //流程实例ID：6d2a9bc1-0cee-11ea-acf5-f894c25ebadd
    }
//

    /**
     * 查询任务，并完成自己的任务
     */
    @Test
    public void testTask() {
        securityUtil.logInAs("ryandawsonuk"); //指定用户认证信息
        Page<Task> taskPage=taskRuntime.tasks(Pageable.of(0,10)); //分页查询列表
        if (taskPage.getTotalItems()>0){
            //说明有任务，进行遍历
            for (Task task:taskPage.getContent()){
                //拾取任务
                taskRuntime.claim(TaskPayloadBuilder.claim().withTaskId(task.getId()).build());
                System.out.println("任务："+task);
                //完成任务
                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());
        }
        //任务：TaskImpl{id='6d310464-0cee-11ea-acf5-f894c25ebadd', owner='null', assignee='null', name='first', description='null', createdDate=Fri Nov 22 14:07:56 CST 2019, claimedDate=null, dueDate=null, priority=50, processDefinitionId='myProcess_1:1:7f72b399-0cec-11ea-8c61-f894c25ebadd', processInstanceId='6d2a9bc1-0cee-11ea-acf5-f894c25ebadd', parentTaskId='null', status=CREATED}
        //任务：[TaskImpl{id='b3cecc85-0cf0-11ea-89ae-f894c25ebadd', owner='null', assignee='null', name='second', description='null', createdDate=Fri Nov 22 14:24:13 CST 2019, claimedDate=null, dueDate=null, priority=50, processDefinitionId='myProcess_1:1:7f72b399-0cec-11ea-8c61-f894c25ebadd', processInstanceId='6d2a9bc1-0cee-11ea-acf5-f894c25ebadd', parentTaskId='null', status=CREATED}]
    }
}

Activiti 新的 API 介绍
https://github.com/Activiti/activiti-7-developers-guide/blob/51a1681c0e4bb5e2f96a6dea73516c9fd53d8521/getting-started/getting-started-activiti-core.md