m-channel
v0.1.7
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A general programming model focused on message flow
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MChannel
A general programming model focused on message flow.
MChannel Module -- Message-Flow Model
Publisher +--------> Channel (filter) ---------> Subscriber
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+--------> Channel (filter) ---------> Subscriber
^
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Publisher +--------> Channel (filter) ---------+
Publisher 和 Subscriber 之间是独立管理的。如果没有 Publisher 与 Subscriber 连接, Subscriber 仍然存在,只是不会有消息流动。如果没有 Subscriber 与 Publisher 连接, Publisher 仍然可以发送消息,只是不会有 Subscriber 接收
消息总是从 Publisher 发出,通过 Channel (filter),到达 Subscriber
一个 Channel 只与一个 Publisher、Subscriber 连接
一个 Publisher 可以连接多个 Channel (filter)
一个 Subscriber 可以连接多个 Channel (filter)
一个 Component 最多只有一个 Publisher、Subscriber
Publisher 和 Subscriber 没有“解除”的同步绑定,即 Publisher 销毁的时候,Subscriber 不会 自动销毁。如果你想在某个 Publisher 销毁的时候,同时销毁监听的 Subscriber,应该让 Publisher 发送一个消息,比如 “destroy”,Subscriber 收到这条消息的时候,可以自己决定是否销毁
Channel (filter) 只负责流动消息,同时可以提供过滤器,只允许特殊条件的消息流动
API
declare namespace MChannel {
export interface IAction {
action: string
}
export class Publisher<A extends IAction = IAction> {
public add(c: Channel): void
public del(c: Channel): void
public replace(c1: Channel, c2: Channel): void
public has(c: Channel): boolean
public items(): Iterable<Channel>
public pub(a: A): void
public attach(c: Channel): void
public detach(c?: Channel): void
}
export class Channel<A extends IAction = IAction> {
constructor(...actionFilter: Array<string>)
public attachPublisher(p: Publisher) : void
public detachPublisher(): void
public attachSubscriber(s: Subscriber): void
public detachSubscriber(): boolean
public pub(a: A): void
}
export class Subscriber<A extends IAction = IAction> {
public add(c: Channel): void
public del(c: Channel): void
public replace(c1: Channel, c2: Channel): void
public has(c: Channel): boolean
public items(): Iterable<Channel>
public notify(a: A): void
public sub(cb: (a: A) => void): void
public attach(c: Channel): void
public detach(c?: Channel): void
}
}
export = MChannel