smart-saga-pattern/dist/adapters/rabbitmq/RabbitMQAdapter.js

A library implementing the Saga pattern for microservice architecture

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RabbitMQAdapter = void 0;
/**
 * Adapter for RabbitMQ message broker
 * Note: This is a placeholder implementation. In a real implementation,
 * you would use a RabbitMQ client library like 'amqplib'.
 */
class RabbitMQAdapter {
    /**
     * Creates a new RabbitMQAdapter
     * @param options RabbitMQ adapter options
     */
    constructor(options) {
        this.handlers = new Map();
        this.connected = false;
        this.options = {
            exchangeType: 'topic',
            ...options
        };
    }
    /**
     * Connects to RabbitMQ
     */
    async connect() {
        // In a real implementation, you would connect to RabbitMQ here
        console.log(`Connecting to RabbitMQ at ${this.options.url}`);
        this.connected = true;
    }
    /**
     * Disconnects from RabbitMQ
     */
    async disconnect() {
        // In a real implementation, you would disconnect from RabbitMQ here
        console.log('Disconnecting from RabbitMQ');
        this.connected = false;
    }
    /**
     * Publishes a message to a topic
     * @param topic Topic to publish to
     * @param message Message to publish
     */
    async publish(topic, message) {
        this.ensureConnected();
        // In a real implementation, you would publish to RabbitMQ here
        console.log(`Publishing message to topic '${topic}':`, message);
        // Simulate message delivery to subscribers
        setTimeout(() => {
            const topicHandlers = this.handlers.get(topic);
            if (topicHandlers) {
                topicHandlers.forEach(handler => {
                    handler(message).catch(error => {
                        console.error(`Error handling message on topic '${topic}':`, error);
                    });
                });
            }
        }, 10);
    }
    /**
     * Subscribes to a topic
     * @param topic Topic to subscribe to
     * @param handler Handler function for messages
     */
    async subscribe(topic, handler) {
        this.ensureConnected();
        // In a real implementation, you would subscribe to RabbitMQ here
        console.log(`Subscribing to topic '${topic}'`);
        const handlers = this.handlers.get(topic) || [];
        handlers.push(handler);
        this.handlers.set(topic, handlers);
    }
    /**
     * Unsubscribes from a topic
     * @param topic Topic to unsubscribe from
     */
    async unsubscribe(topic) {
        this.ensureConnected();
        // In a real implementation, you would unsubscribe from RabbitMQ here
        console.log(`Unsubscribing from topic '${topic}'`);
        this.handlers.delete(topic);
    }
    /**
     * Ensures the adapter is connected
     */
    ensureConnected() {
        if (!this.connected) {
            throw new Error('RabbitMQAdapter is not connected');
        }
    }
}
exports.RabbitMQAdapter = RabbitMQAdapter;