# Building a Scalable Job Consumer System in Go

DevFeed: [Building a Scalable Job Consumer System in Go](<https://devfeed.tech/articles/building-a-scalable-job-consumer-system-in-go-22870.md>)

Original publisher: [Read original article](<https://medium.com/mindorks/building-a-scalable-job-consumer-system-in-go-e513a7ae1d39?source=rss----f1a763fc7443---4>)

Author: ansu jain

Published: 2024-10-16T06:48:50Z

Content type: tutorial

Language: en

Sources: [Mindorks - Medium](<https://devfeed.tech/sources/mindorks-medium.md>)

Topics: [Go Language](<https://devfeed.tech/topics/go-language.md>), [Amazon Simple Queue Service (SQS)](<https://devfeed.tech/topics/amazon-simple-queue-service-sqs.md>), [Concurrency](<https://devfeed.tech/topics/concurrency.md>), [Orchestration](<https://devfeed.tech/topics/orchestration.md>)

Tags: [consumer](<https://devfeed.tech/tags/consumer.md>), [go](<https://devfeed.tech/tags/go.md>), [goroutines](<https://devfeed.tech/tags/goroutines.md>), [message-queue](<https://devfeed.tech/tags/message-queue.md>), [orchestration](<https://devfeed.tech/tags/orchestration.md>), [parallel](<https://devfeed.tech/tags/parallel.md>), [sqs](<https://devfeed.tech/tags/sqs.md>), [workers](<https://devfeed.tech/tags/workers.md>)

## AI overview

This tutorial presents a scalable job consumer system in Go. It describes interfaces for queue consumption, job management, job handling, and configuration, with parallel workers processing messages from queues such as AWS SQS.

## Source excerpt

In this article, I will walk through the design of a scalable and extensible job consumer system using Go. This system allows the flexible registration of different jobs and the parallel consumption of messages from a message queue. I'll focus on how this system can be used to handle real-world scenarios like payment processing, order proccesing etc where different jobs consume messages from a queue (e.g., AWS SQS) and execute business logic based on the type of message received. Key Components of the Design IMessageConsumer - A generic interface for interacting with message queues (e.g., SQS). IJobManager - An interface that coordinates jobs and workers, responsible for consuming messages and distributing them to registered jobs. IJobHandler - An interface representing individual jobs. Each job implements specific business logic. IQueueConfig - Provides configurations for the queue (e.g., queue name, region, broker type). IJobConfig - Provides job-level configurations (e.g., number of consumers, timeouts). Core Concepts1. IMessageConsumer This interface abstracts queue operations, exposing methods for dequeuing and deleting messages. It's implemented by specific brokers (such as SQS in this case). Here's a basic structure: type IMessageConsumer interface { Dequeue(noOfMessages int64) ([]Message, error) Delete(messageIdentifier string) error } Dequeue: Fetches messages from the queue. Delete: Deletes a message after it has been successfully processed. 2. IJobManager This is where the system's core orchestration happens. The JobManager manages a pool of registered jobs and starts multiple workers to process messages concurrently. It uses a Consume method to begin processing and a RegisterJob method to register jobs into the system. type IJobManager interface { Consume(ctx context.Context) RegisterJob(job IJobHandler) } RegisterJob: Adds a job to the manager's job list. Consume: Starts the workers that process messages from the queue in parallel for each registered jo