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Make a little more oo-ish. #3240

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25 changes: 11 additions & 14 deletions src/Adapters/MessageQueue/EventEmitterMQ.js
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Original file line number Diff line number Diff line change
@@ -1,17 +1,6 @@
import events from 'events';

const emitter = new events.EventEmitter();
const subscriptions = new Map();

function unsubscribe(channel: string) {
if (!subscriptions.has(channel)) {
//console.log('No channel to unsub from');
return;
}
//console.log('unsub ', channel);
emitter.removeListener(channel, subscriptions.get(channel));
subscriptions.delete(channel);
}

class Publisher {
emitter: any;
Expand All @@ -26,6 +15,7 @@ class Publisher {
}

class Consumer extends events.EventEmitter {
static subscriptions = new Map();
emitter: any;

constructor(emitter: any) {
Expand All @@ -34,16 +24,23 @@ class Consumer extends events.EventEmitter {
}

subscribe(channel: string): void {
unsubscribe(channel);
this.unsubscribe(channel);
const handler = (message) => {
this.emit('message', channel, message);
}
subscriptions.set(channel, handler);
Consumer.subscriptions.set(channel, handler);
this.emitter.on(channel, handler);
}

unsubscribe(channel: string): void {
unsubscribe(channel);
if (!Consumer.subscriptions.has(channel)) {
//console.log('No channel to unsub from');
return;
}

//console.log('unsub ', channel);
this.emitter.removeListener(channel, Consumer.subscriptions.get(channel));
Consumer.subscriptions.delete(channel);
}
}

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