Author: Zen and the Art of Computer Programming
1 Introduction
Message Queue (Message Queue) is an advanced application-level component for processing asynchronous tasks. Amazon SQS is a message queuing service provided by Amazon Web Services (AWS) that supports massive messages and is secure, reliable, and scalable. Its advantage is that it can provide functions such as high reliability, scalability, and low latency. This article mainly explains the basic knowledge, core concepts and principles related to Amazon SQS, and how to use these technologies in actual scenarios to achieve various business needs.
2. Basic Concepts and Terminology
2.1 Overview of Message Queue
Message Queue (Message Queue) is an advanced application-level component for processing asynchronous tasks. It stores messages through a queue, and then consumers get and process messages from the queue. The message queue solves the problem of communication between the producer and the consumer, reduces the coupling between the two sides, and improves the stability and efficiency of the system. Message queues can help solve problems in scenarios such as asynchronous communication, peak shaving, traffic peak shaving, real-time data processing, large-scale distributed computing, scheduled task scheduling, and event notification.
In order to better understand message queues, the following are the basic elements of message queues.
- Source: Producer or Publisher, the role of sending messages to the queue.
- Destination: Consumer, the role of reading messages from the queue.
- Message: A data unit stored in a message queue.
- Queue: Messages are arranged in a first-in, first-out manner. The queue has the highest priority and is used to hold messages temporarily.
- Topic: A logical collection of message categories. Consumers subscribed to a topic can receive messages of a specific type.