Solon2 开发之IoC,九、自定义注解开发汇总

1、定义构建能力注解,比如@Controller

注解类:

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Controller {
}

注解类能力注册:

//注册 @Controller 构建器
Solon.context().beanBuilderAdd(Controller.class, (clz, bw, anno) -> {
    //内部实现,可参考项目源码
    new HandlerLoader(bw).load(Solon.app());
});

应用示例:

@Controller
public class DemoController{
    @Mapping("/hello")
    public String hello(){
        return "Hello world!";
    }
}

2、定义字段或参数注入能力的注解,比如@Inject

注解类:

@Target({ElementType.FIELD, ElementType.PARAMETER, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Inject {
    String value() default "";
    boolean required() default true;
    boolean autoRefreshed() default false;
}

注解类能力注册:

//注册 @Inject 注入器
Solon.context().beanInjectorAdd(Inject.class, ((fwT, anno) -> {
    //内部实现,可参考项目源码
    beanInject(fwT, anno.value(), anno.autoRefreshed());
}));

应用示例:

@Service
public class DemoService{
    //注入字段
    @Inject
    UserMapper userMapper;
}

@Configuration
public class DemoConfig{
    //注入到参数。只支持与:@Bean 配合
    @Bean
    public DataSource ds(@Inject("${db1}") HikariDataSource ds){
        return ds;
    }
}

3、定义函数拦截能力的注解,比如@Tran

注解类:

@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface Tran {
    TranPolicy policy() default TranPolicy.required;
    TranIsolation isolation() default TranIsolation.unspecified;
    boolean readOnly() default false;
}

注解类能力注册:

 //内部实现,可参考项目源码
Solon.context().beanAroundAdd(Tran.class, new TranInterceptor(), 120);

应用示例:

@Service
public class DemoService{
    //注入字段
    @Inject
    UserMapper userMapper;
    
    @Tran
    public void addUser(User user){
        userMapper.add(user);
    }
}

4、定义函数提取能力的注解,比如:@CloudJob

注解类:

@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface CloudJob {
    @Alias("name")
    String value() default "";
    @Alias("value")
    String name() default "";
    String cron7x() default "";
    String description() default "";
}

注解类能力注册:

 //内部实现,可参考项目源码
Solon.context().beanExtractorAdd(CloudJob.class, CloudJobExtractor.instance);

应用示例:

@Component
public class JobController{
    @CloudJob(name="user.stat", cron7x="0 0/1 * * * ? *")
    public void userStatJob(){
        //...
    }
}
posted @ 2023-02-13 21:58  带刺的坐椅  阅读(36)  评论(0编辑  收藏  举报