Análise e aplicação de técnicas de resiliência de software à biblioteca DF-e

Abstract

Software resilience is the ability of a system to remain operational in the face of failures or adversities, playing a crucial role in ensuring the availability and reliability of critical applications. In fiscal applications, this characteristic takes on extreme importance, as it ensures the uninterrupted continuity of operations, preserving the availability and integrity of fiscal information while meeting legal deadlines, maintaining taxpayer trust, and protecting sensitive data. The analysis and application of resilience patterns to the DF-e library aimed to improve its stability and effectiveness. Resilience was addressed in various areas, including software availability, XML storage, and communication with external services. The results highlight significant gains, such as the implementation of autoscaling, which increased the availability of the Emission Service from 90% to 100%, also optimizing infrastructure costs. In XML storage, the adoption of resilient strategies drastically reduced manual interventions and improved customer satisfaction. The introduction of the Circuit Breaker pattern mitigated failures in fiscal authorizers, stabilizing resource usage. Advanced retry strategies in communication with external services resulted in effective recovery from temporary failures. In summary, the implementation of these patterns enhanced the resilience of the DF-e library, ensuring greater reliability, efficiency, and user satisfaction.