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README
Apache-2.0

项目介绍

Kafka是一个拥有高吞吐、可持久化、可水平扩展,支持流式数据处理等多种特性的分布式消息流处理中间件,采用分布式消息发布与订阅机制,在日志收集、流式数据传输、在线/离线系统分析、实时监控等领域有广泛的应用。

开发环境

工具 版本
JDK 1.8
IDEA 2021.3.1
Maven 3.8.1
Kafka 2.3.0

场景说明

Kafka作为一个中间件组件,具有与其他中间件组件通用的功能 (异步处理、系统解耦、流量削峰、日志处理), 但在某些特殊的功能方面,每个中间件拥有其独特的特性,其中Kafka作为一个具有高吞吐、高性能的中间件, 它也有其不足的地方,在某些应用场景下面要求中间件实现消息延时的功能,但Kafka本身是不具备这种能力的。

此DEMO项目实现了每条消息实现自定义的延时。

时序图

参数指南

本项目中起到延时作用的类Delay.java其余类为官方提供用于测试生产和消费消息, 如需使用官方测试的使用的生产消费代码相关配置介绍可以参考https://support.huaweicloud.com/devg-kafka/how-to-connect-kafka.html 。 如需使用自己配置的生产者消费者,只配置Delay.java中的参数即可。

Delay.java参数详情

  1. delay:自定义延时时间,单位ms。
  2. topic_delay变量:用于临时存储消息的topic名称。
  3. topic_out变量:用于消费者拉取消息消费的topic名称。
  4. 关于消费者和生产者配置可按需配置,可参考Kafka官方文档:https://kafka.apache.org/documentation/#producerconfigs

调用结果

问题反馈通道

https://support.developer.huaweicloud.com/feedback/

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简介

Kafka作为一个中间件组件,具有与其他中间件组件通用的功能 (异步处理、系统解耦、流量削峰、日志处理), 但在某些特殊的功能方面,每个中间件拥有其独特的特性,其中Kafka作为一个具有高吞吐、高性能的中间件, 它也有其不足的地方,在某些应用场景下面要求中间件实现消息延时的功能,但Kafka本身是不具备这种能力的。 此DEMO项目实现了每条消息实现自定义的延时。 展开 收起
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