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ER (Rest Web Service (Jackson (JsonManagedReference is the “front” part of…

- - - - aspect: bắt đầu định nghĩa 1 aspect, aspect
        
        advise: là advise method,
        vd: public void logResource(JoinPoint joinPoint) { :warning:
        
        TYPE này là có liên quan mật thiết đến joinpoint
        
        Before, anh này là thực thi trước joinPoint
        
        AfterReturning, anh này sẽ thực thi sau khi joinpoint hoàn thành
        
        AfterThrowing, anh này thực thi nếu joinpont có văng lỗi
        
        After, vừa hoàn thành vừa bắt lỗi, quá tiện
        
        Around: thực thi trước và sau joinpoint, lấy lỗi luôn
        
        join point: nơi mà hàm advice code sẽ được apply, public void logResource(JoinPoint joinPoint) {
        
        point cut: tập hợp một chuỗi template expression , sẽ thực thi joinpoint
        Pointcut("execution(* edu.mum.service..*(..))")
        
        Point Cut Designators [PCD]
        
        execution : match hết tất cả method
        
        within : match join trong sub package ???
        
        target
        
        args : match với instance agrument to given type
        
        annotation : map những method mà có tồn tại annotation
        
        2 type của PCD
        
        Explicit
        
        Implicit
        
        Interceptor Chain
        Aspect
        Order(1)
        On the way in to a joinpoint, the advice with lowest Order value gets executed first.
    - - static (framework hỗ trợ là AspectJ)
        
        những cái hàm chính này thường dùng trong lúc compile time
        
        sửa đổi thẳng trong mã bytecode,
        
        thường thì apply vào các field, tạo nhiều join point (ở trên)
        
        áp dụng cho tất cả code trên java
      - dynamic (framework hỗ trợ là Spring AOP)
        
        thường thì dùng để apply những thay đổi lúc runtime
        
        tiếp cận theo pattern proxy (trình bày sau)
        
        áp dụng cho các method hơn
        
        áp dụng cho các Spring managed beans
- - - - point to point:
        build concept of queue message
        multi producers -> queue <- single consumer
      - public subscribe system
        use a topic to send and receive message
        one producer (publishes) -> topic <-(subscribes) ->(delivery) multiple consumers
- - - - is a framework
      - for javabean validation
      - Bean Validation defines a metadata model and API for JavaBean validation
      - Hibernate Validator is the reference implementation for JSR 303
  - - - đặc điểm
        
        Constraints may be added to one or more groups
        
        Groups allow you to restrict the set of constraints applied during validation.
- - - - Does provide the framework and all the components
        needed to do the same things that would make you consider an ESB in the first place.
      - A Spring Integration application is just a Spring application with some beans in the context that handle the integration concerns.
      - That means you can deploy anywhere and at any scale.
        It is Lightweight
    - - Message Channel: is the component through which messages are moved so it can be thought as a pipe between message producer and consumer (PTP or Pub/Sub)
      - Message Endpoint: isolates the application code from the infrastructure. it is an abstraction layer between the application code and the messaging framework. they are message producers or consumers.
      - Message: is a generic wrapper for any Java object combined with metadata used by the framework while handling that object. it consists the payload and the headers.
    - - Messaging Gateway : entry point for the system [encapsulates Message API ]
      - Message Router decides what channel(s) should receive the Message
      - Messaging Bridge endpoint that connects two Channels or Channel Adapters.
      - Channel Adapter is a Message Endpoint that enables connecting a single sender or receiver to a Message Channel
- - - - tính năng :green_cross:
        Transaction management, Chunk based processing, Declarative I/O, Statistics, Start/Stop/Restart, Retry/Skip, Web based,administration interface (Spring Batch Admin),Parallel processing & partitioning techniques to process high-volume of data.
        
        Spring Scheduling Annotation
        CRON Scheduling
        
        step: Có 3 step chính là: item reader, item processor, item writer