## +23 ## Single Producer Single Consumer Lock-free FIFO From the Ground Up CHARLES FRASCH Charlie Frasch charles.frasch@gmail.com Senior Core Developer - IEX Group https://www.iex.io/ Code at: https://github out-of-the-box implementations. ## Single Producer Single Consumer Lock-Free Wait-Free Fifo - Single producer: one producer (aka writer) thread - Single consumer: one consumer (aka reader) thread - Lock-free: Wait-free: each thread moves forward regardless of other threads. - [Circular] Fifo [or Queue]: a single, fixed-size buffer as if it were connected end-to-end. The oldest entry is processed first. ## Using

## +24 ## Multi Producer, Multi Consumer, Lock Free, Atomic Queue User API and Implementation ... ## EREZ STRAUSS ## Lockfree, MPMC Queue - Legal All Statements and representations are my own and do ef36cdf83777244/p10_1.jpg) ## Queue - Message and time flow Producer 1 Consumer 1 Producer 2 Consumer 2 Queue Producer N Consumer M out time ## Lockfree, MPMC Queue - Connecting Application Components / dynamic & memory allocation - Serialization: Strict global order or relaxed per producer order API: single item / multiple items, atomicity-ready or not • Message size: fixed / dynamic Queue -

## Overview Casdoor is a UI-first Identity Access Management (IAM) / Single-Sign-On (SSO) platform based on OAuth 2.0, OIDC, SAML, and CAS. You need to enable JavaScript to run this app. Casdoor serves Java, etc.) GetSignupUrl() and GetSigninUrl(): casdoor-go-sdk ## Provider Casdoor is a federated single sign-on system that supports multiple identity providers via OIDC, OAuth, and SAML. Casdoor can also https://github.com/casdoor/casdoor. Both the Go backend code and React frontend code are contained in a single repository. |Name|Description|Language|Source code| |---|---|---|---| |Frontend|Web frontend UI

... 32 11.2.3 Producer 配置 ..... 33 11.2.4 PushConsumer 配置 ..... 33 11.2.5 PullConsumer 配置 ..... 34 11.3 Message 数据结构 ..... 35 11.3.1 针对 Producer ..... 35 11.3.2 针对 Consumer ..... 35 12 Broker 12.3 Broker 重启对客户端的影响 ..... 40 13 Producer 最佳实践.....40 13.1 发送消息注意事项.....40 13.2 消息发送失败如何处理.....41 13.3 选择 oneway 形式发送.....42 13.4 发送顺序消息注意事项.....42 14 Consumer 最佳实践.....42 14.1 消费过程要做到幂等（即消费端去重） 应用提供消息服务 ## 3 专业术语 ■ Producer 消息生产者，负责产生消息，一般由业务系统负责产生消息。 ■ Consumer 消息消费者，负责消费消息，一般是后台系统负责异步消费。 ■ Push Consumer Consumer 的一种，应用通常向 Consumer 对象注册一个 Listener 接口，一旦收到消息，Consumer 对象立刻回调 Listener 接口方法。

## Moving large scale consumer e-commerce Infrastructure to Mesh Rajath Ramesh Principal Software Engineer @Carousell Harshad Rotithor Software Architect @Carousell ![Image](/uploads/documents/6/7/

guarantee of delivery, then some time later the messaging system delivers the message to a consumer. The consumer then processes the message and when it is done, it acknowledges the message. Once the message the messaging server receives an acknowledgement from the consumer, then on recovery, the message will be available to be delivered to a consumer again. With point-to-point messaging, there can be many ordering processing components. Different messages can be processed by different order processors, but a single order is only processed by one order processor - this ensures orders aren't processed twice.

guarantee of delivery, then some time later the messaging system delivers the message to a consumer. The consumer then processes the message and when it is done, it acknowledges the message. Once the message the messaging server receives an acknowledgement from the consumer, then on recovery, the message will be available to be delivered to a consumer again. With point-to-point messaging, there can be many ordering processing components. Different messages can be processed by different order processors, but a single order is only processed by one order processor - this ensures orders aren't processed twice.

guarantee of delivery, then some time later the messaging system delivers the message to a consumer. The consumer then processes the message and when it is done, it acknowledges the message. Once the message the messaging server receives an acknowledgement from the consumer, then on recovery, the message will be available to be delivered to a consumer again. With point-to-point messaging, there can be many ordering processing components. Different messages can be processed by different order processors, but a single order is only processed by one order processor - this ensures orders aren't processed twice.

guarantee of delivery, then some time later the messaging system delivers the message to a consumer. The consumer then processes the message and when it is done, it acknowledges the message. Once the message the messaging server receives an acknowledgement from the consumer, then on recovery, the message will be available to be delivered to a consumer again. With point-to-point messaging, there can be many ordering processing components. Different messages can be processed by different order processors, but a single order is only processed by one order processor - this ensures orders aren't processed twice.

guarantee of delivery, then some time later the messaging system delivers the message to a consumer. The consumer then processes the message and when it is done, it acknowledges the message. Once the message the messaging server receives an acknowledgement from the consumer, then on recovery, the message will be available to be delivered to a consumer again. With point-to-point messaging, there can be many ordering processing components. Different messages can be processed by different order processors, but a single order is only processed by one order processor - this ensures orders aren't processed twice.