Activiti-springboot整合

Activiti7发布正式版之后，它与springboot2.x已经完全支持整合开发；我们可以将activiti7与springboot整合开发的坐标引入到工程中，从而达到springboot支持activiti7整合；

springboot整个activiti7的具体步骤如下：

　　1.添加springboot整个activiti7的坐标；

　　2.添加SpringSecurity安全框架的整合配置信息；

　　3.使用activiti7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

1.整合实例如下：

　　1.1 导入依赖

 <properties>
        <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-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <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>

        <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>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.5.RELEASE</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

　　1.2 application.yml配置文件

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/activiti-wn?useUnicode=true&characterEncoding=utf8&serverT imezone=GMT
    username : root
    password : 123
    driver-class-name: com.mysql.jdbc.Driver
  activiti:
    db-history-used: true   #开启历史信息

　　1.3 添加SecurityUtil类

　　　　为了能够快速实现SpringSecurity安全框架的配置，所以添加一个组件；

package com.wn.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);
    }
}

　　1.4  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.wn.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();
    }
}

　　1.5 将流程图放在resources下的processes包里，然后启动springboot

　　　　

　　　　

　　1.6 查询流程定义信息

@RestController
@RequestMapping("/activiti")
public class ActivitiTest {
    @Resource
    private ProcessRuntime processRuntime;
    @Resource
    private TaskRuntime taskRuntime;
    @Resource
    private SecurityUtil securityUtil;

    /*查询流程定义信息*/
    @RequestMapping("/getProcess")
    public void getProcess(){
        //查询所有流程定义信息
        Page<ProcessDefinition> processDefinitionPage = processRuntime.processDefinitions(Pageable.of(0, 10));
        System.out.println("当前流程定义的数量："+processDefinitionPage.getTotalItems());
        //获取流程信息
        for (ProcessDefinition processDefinition:processDefinitionPage.getContent()){
            System.out.println("流程定义信息："+processDefinition);
        }
    }
}

　　1.7 启动流程实例

    /**
     * 启动流程示例
     */
    @RequestMapping("/startInstance")
    public void startInstance(){
        ProcessInstance instance = processRuntime.start(ProcessPayloadBuilder.start().withProcessDefinitionKey("demo").build());
        System.out.println(instance.getId());
    }

　　1.8 获取任务，拾取任务

    /**
     * 获取任务，拾取任务，并且执行
     */
    @RequestMapping("/getTask")
    public void getTask(){
        securityUtil.logInAs("salaboy");        //指定组内任务人
        Page<Task> tasks = taskRuntime.tasks(Pageable.of(0, 10));
        if(tasks.getTotalItems()>0){
            for (Task task:tasks.getContent()) {
                System.out.println("任务名称："+task.getName());
                //拾取任务
                taskRuntime.claim(TaskPayloadBuilder.claim().withTaskId(task.getId()).build());
                //执行任务
                taskRuntime.complete(TaskPayloadBuilder.complete().withTaskId(task.getId()).build());
            }
        }
    }