A Data-Consistent Microservices Architecture Library using Saga Design Pattern and Backup Mechanism

In recent years, the proliferation of complex applications has led to the emergence of microservices architecture as the preferred approach for developing large-scale applications. Consequently, numerous design patterns for microservice communication have evolved, with service orchestration gaining widespread acceptance as a standard solution in recent times. However, the data inconsistency issue caused by inter-microservice logic errors and unexpected server interruptions by the orchestrator during the orchestration process has become a significant challenge in the microservices architecture. This study delves into design patterns for microservice data consistency and develops the data consistency and backup library, Anser-Saga, which enables the creation of backups and restart points of distributed transaction states, ensuring eventual data consistency between microservice endpoints. Furthermore, it introduces a service backup mechanism to guarantee the orchestrator's ability to compensate and restart orchestration processes in the event of unforeseen abnormal failures, thereby ensuring the integrity of distributed transactions and achieving high availability of services. Through experimental design and case testing, comparisons and evaluations are conducted with existing solutions to ensure the performance and stability of the developed library in this study. The experiments confirm that the proposed Saga solution exhibits better performance and stability, enabling developers to implement highly available microservices architectural applications with distributed data consistency using the Anser-Saga library.