redis-smq-common/dist/esm/src/event-bus/event-bus.js

Provides essential components and utilities shared across RedisSMQ packages.

import { EventBusNotConnectedError } from './errors/index.js';
import { Runnable } from '../runnable/index.js';
import { createLogger } from '../logger/index.js';
export class EventBus extends Runnable {
    namespace;
    logger;
    constructor(config = {}, namespace = '') {
        super();
        this.namespace = namespace ? `${namespace}:` : '';
        this.logger = createLogger(config?.logger, `${this.constructor.name}${namespace ? `-${namespace}` : ''}-${this.id}`);
    }
    toNamespacedEvent(event) {
        return event === 'error' ? 'error' : `${this.namespace}${event}`;
    }
    emit(event, ...args) {
        if (event === 'error') {
            return super.emit(event, ...args);
        }
        if (!this.isOperational()) {
            this.eventEmitter.emit('error', new EventBusNotConnectedError());
            return false;
        }
        const namespacedEvent = this.toNamespacedEvent(String(event));
        this.eventEmitter.emit(namespacedEvent, ...args);
        return true;
    }
    on(event, listener) {
        const namespacedEvent = this.toNamespacedEvent(String(event));
        this.eventEmitter.on(namespacedEvent, listener);
        return this;
    }
    once(event, listener) {
        const namespacedEvent = this.toNamespacedEvent(String(event));
        this.eventEmitter.once(namespacedEvent, listener);
        return this;
    }
    removeListener(event, listener) {
        const namespacedEvent = this.toNamespacedEvent(String(event));
        this.eventEmitter.removeListener(namespacedEvent, listener);
        return this;
    }
    removeAllListeners(event) {
        const namespacedEvent = event
            ? this.toNamespacedEvent(String(event))
            : undefined;
        return super.removeAllListeners(namespacedEvent);
    }
    goingDown() {
        return [
            (cb) => {
                super.removeAllListeners();
                cb();
            },
        ].concat(super.goingDown());
    }
}
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