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msg-broker-lib

v1.0.1

Published

Abstração reusável para brokers Kafka, SQS e SNS

Readme

message-broker-lib

Biblioteca TypeScript para facilitar o envio e recebimento de mensagens em sistemas distribuídos, suportando Kafka e Amazon SQS com uma API unificada.


Recursos

  • Publicação e consumo de mensagens em Kafka
  • Publicação e consumo de mensagens em Amazon SQS
  • Controle de confirmação (ack/nack) de mensagens
  • Suporte a headers customizados
  • Estrutura modular e reutilizável para integração em diversos projetos

Instalação

npm install msg-broker-lib

Exemplo de uso com Kafka

import { KafkaPublisherSubscriber, handleNack } from 'msg-broker-lib';

const kafka = new KafkaPublisherSubscriber(['localhost:9092']);

async function run() {
  // Consumir mensagens
  await kafka.subscribe(
    { destination: 'meu-topico', consumerGroup: 'meu-grupo' },
    async (msg, control) => {
      try {
        console.log('Mensagem recebida:', msg);
        await control.ack();
      } catch (error) {
        await handleNack(control, error);
      }
    },
  );

  // Publicar mensagem
  await kafka.publish(
    { destination: 'meu-topico', key: 'chave-1', headers: { origem: 'app' } },
    { texto: 'Olá Kafka!' },
  );
}

run();

Exemplo de uso com Amazon SQS

import { SqsPublisherSubscriber, handleNack } from 'mmsg-broker-lib';

const sqs = new SqsPublisherSubscriber('us-east-1');

async function run() {
  // Consumir mensagens
  await sqs.subscribe(
    { destination: 'https://sqs.us-east-1.amazonaws.com/123456789012/minha-fila' },
    async (msg, control) => {
      try {
        console.log('Mensagem SQS:', msg);
        await control.ack();
      } catch (error) {
        await handleNack(control, error);
      }
    },
  );

  // Publicar mensagem
  await sqs.publish(
    { destination: 'https://sqs.us-east-1.amazonaws.com/123456789012/minha-fila' },
    { texto: 'Olá SQS!' },
  );
}

run();

API

Classes principais

  • KafkaPublisherSubscriber(brokers: string[]) Construtor que recebe array de brokers Kafka.

  • SqsPublisherSubscriber(region: string) Construtor que recebe a região AWS.

Métodos

  • publish(options: BrokerPublishOptions, message: any): Promise Publica uma mensagem no destino configurado.

  • subscribe(options: BrokerSubscribeOptions, handler: (msg, control) => Promise): Promise Inscreve um consumidor para receber mensagens.

  • handleNack(control: MessageControl, error: Error): Promise Função utilitária para lidar com falha no processamento de mensagem.