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proxy.golang.org : github.com/rilder-almeida/sagas
The sagas package is a framework to implement the saga pattern in Go. It was inspired on the article "SAGAS" by Hector Garcia-Molina, Kenneth Salem, and Harold F. Korth, published by the ACM in 1987, and the article "Implementing Sagas" by Caitie McCaffrey, published by Microsoft in 2016. Initially, the saga pattern was proposed to solve the problem of long-lived and complex transactions in distributed systems. In most cases, LLTs must preserve the consistency in the data, atomicity of the transactions and have to be a fault-tolerant process. Besides that, TTLs use to access many objects that may cause a deadlock or locks in the database for a long time. In a short definition, a saga breaks a long-lived transaction into a sequence of transactions that can be executed in a distributed environment. Each transaction process data and publishes a message or event to trigger the next transactionin in the saga. If a transaction fails then a compensation must be executed to undo the changes or in some cases to make a compensating change. In other words, compensation transactions can be a rollback or roll-forward transaction. The transactions and compensations together form a saga. For more information about the saga pattern, please read the articles mentioned above. This package provides a framework composed by the following objects: Saga, Step and Action. Action abstracts a function that will be executed by a Step. The Step executes the Action and publishes a event for the Saga, using the Notifier. The Saga cares about the execution of the steps, it receives the events from the Notifier through the Observer. The Saga's observer holds the Execution Plan that will determine the next Step to be executed. The following diagram shows the relationship between the objects: The implementation of the package in the application is not complex. The following code shows how to create a saga and execute it:
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purl: pkg:golang/github.com/rilder-almeida/sagas
Keywords: distributed-systems, observer-pattern, saga-pattern
License: MIT
Latest release: 9 months ago
First release: 11 months ago
Namespace: github.com/rilder-almeida
Stars: 5 on GitHub
Forks: 0 on GitHub
See more repository details: repos.ecosyste.ms
Last synced: 12 days ago