Chain of Responsibility in Go

The steps to implement the Chain of Responsibility pattern in Go language are as follows:

1. First, create an interface to define the processing nodes in the chain of responsibility, for example:

type Handler interface {
    SetNext(handler Handler)
    HandleRequest(request Request) bool
}

1. Implement multiple concrete handling nodes that implement the Handler interface. Each node should implement the HandleRequest method to process requests, and set the next handling node using the SetNext method. For example:

type ConcreteHandler1 struct {
    next Handler
}

func (c *ConcreteHandler1) SetNext(handler Handler) {
    c.next = handler
}

func (c *ConcreteHandler1) HandleRequest(request Request) bool {
    // 处理请求的逻辑

    if c.next != nil {
        return c.next.HandleRequest(request)
    }

    return true
}

1. Create a chain of responsibility object by linking together specific handling nodes.

handler1 := &ConcreteHandler1{}
handler2 := &ConcreteHandler2{}
handler3 := &ConcreteHandler3{}

handler1.SetNext(handler2)
handler2.SetNext(handler3)

1. Finally, by invoking the HandleRequest method of the chain of responsibility object, the request is passed to the first processing node in the chain, thus triggering the entire processing flow of the chain.

request := Request{...}
handler1.HandleRequest(request)

By following these steps, it is possible to implement request processing using the chain of responsibility pattern in Go language.