Activiti与SpringBoot的整合

1.pom依赖

    <!--activiti7与SpringBoot整合的相关依赖-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.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>

2.数据库配置

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

​

3.添加SpringSecurity安全框架

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。

（1）添加SecurityUtil类

@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);
    }
}

​

（2）添加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。

@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"},
                {"system", "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(SimpleGrantedAuthority::new).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();
    }
}

（3）创建测试类

@RunWith(SpringRunner.class)
@SpringBootTest
public class Actviti7DemoApplicationTests {
    @Autowired
    private ProcessRuntime processRuntime;
    @Autowired
    private TaskRuntime taskRuntime;
    @Autowired
    private SecurityUtil securityUtil;
}

（4）查看流程定义信息

activiti7与SpringBoot整合后会自动读取resources/processes下的所有bpmn流程图

    @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);
        }
    }

（5）启动流程实例

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

（6）查询并完成任务

该实例的流程图中，已经指定两个步骤的指派的组。我们可以用指定组中的用户登录去查询任务并完成任务。

 

    @Test
    public void testTask() {
        securityUtil.logInAs("ryandawsonuk");
        Page<Task> taskPage = taskRuntime.tasks(Pageable.of(0, 10));
        if (taskPage.getTotalItems() > 0) {
            //遍历任务列表
            for (Task task : taskPage.getContent()) {
                //拾取任务 candidateGroups="activitiTeam"
                taskRuntime.claim(TaskPayloadBuilder.claim().withTaskId(task.getId()).build());
                System.out.println("任务：" + task);
                //执行任务
                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());
        }
    }