bpframework

This project is still in development

• Setup.
• Example.
• Feature.
• Configure.
  • @FindMicroserviceConfigure
  • @RestControllerConfigure
  • @FeignClientConfigure
  • @Value
• Middleware.
• Event Listener.
  • @ContextRefreshedEventListener
  • @RefreshRemoteEventListener
  • @InstanceRegisteredEventListener
• Scheduling
  • @Scheduled

Setup.

use cli to create a project.

npm i bpframework-cli -g

create a project.

bpframework init

Example.

see directory ./examples

Feature.

feature	supports
config	bootstrap.yml SpringCloudConfig
discovery	nacos
scheduling	@Scheduled
api routers	@RestController

Configure.

The appropriate configuration is required to enable the corresponding feature: config

name	description
FindMicroserviceConfigure	定义自定义的服务发现处理方法
FeignClientConfigure	定义FeignClient的默认headers等信息
RestControllerConfigure	定义RestController的默认headers等信息

@FindMicroserviceConfigure

By default, nacos is used to find micro-service; You can customize it by @FindMicroserviceConfigure.

@Service()
class Configure {
  @FindMicroserviceConfigure
  async onFindMicroservice(serviceName: string, excludeHost: string): Promise<ServiceInfo> {
    return {
      ip,
      port,
      serviceName,
      metadata,
    }
  }
}

@RestControllerConfigure

定义RestController的默认headers等信息, 使用如下方式.

@Service()
class Configure {
  @RestControllerConfigure
  onConfigure(): bp.RestControllerConfigureInfo {
    return {
      defaultHeaders: {'content-type': 'application/json;charset=utf-8'},
    }
  }
}

@FeignClientConfigure

定义FeignClient的默认headers等信息, 使用如下方式.

@Service()
class Configure {
  @FeignClientConfigure
  onConfigure(): bp.FeignClientConfigureInfo {
    return {
      defaultHeaders: {'content-type': 'application/json;charset=utf-8'},
      /**
       * 对每次请求后接收的消息进行过滤.
       */
      filterResponseCallback: (data: FeignClientFilterResponseData) => {
        
      },
      /**
       * Processing the data of the request.
       */
      filterRequestCallback: (data: FeignClientFilterRequestData, feignData: FeignDataType) => {

      }
    }
  }
}

@Value

使用 @Value 注解设置初始值或获取配置值.

@Service()
class Demo {
  @Value("Miss A")
  teacher1Name: string; // will set to 'Miss A'

  @Value("${teacherName2}")
  teacher2Name: string; // will set to config value "teacherName2"

  @Value("${teacherName3:defaultName}")
  teacher3Name: string; // will set to 'defaultName' if config value "teacherName3" isn't existed.
}

Middleware.

see https://github.com/bpcloud/middleware.git

Event Listener.

name	description
ContextRefreshedEventListener	本地配置加载完成, 系统service对象初始化完成
RefreshRemoteEventListener	远程配置动态刷新事件
InstanceRegisteredEventListener	实例注册到注册中心后的事件

@ContextRefreshedEventListener

本地配置加载完成, 系统service对象初始化完成.

@Service()
class ApplicationEvent {
  @ContextRefreshedEventListener
  async onContextRefreshed(ev:ContextRefreshedEvent):void {

  }
}

@RefreshRemoteEventListener

远程配置动态刷新事件.

@Service()
class ApplicationEvent {
  @RefreshRemoteEventListener
  async onRefreshRemote(ev:RefreshRemoteEvent):void {

  }
}

@InstanceRegisteredEventListener

实例注册到注册中心后的事件.

@Service()
class ApplicationEvent {
  @InstanceRegisteredEventListener
  async onInstanceRegistered(ev:InstanceRegisteredEvent):void {
    
  }
}

Scheduling

@Scheduled

使用此注解可以开启一个定时任务.

@Service()
class Demo {
  @Scheduled({cron:'* * * * * *'})
  async onTick(): Promise<false|void> {
    return false; // 返回false则表明停止此task.
  }
}

• Start task: 当类实例被创建后, task即按照时间间隔运行
• Stop task: 当@Scheduled修饰的方法明确返回false时, task将停止