Add aggregate comlink response code stats

[dydxwill]

Changelist

Add aggregate comlink response code stats.

Test Plan

Plan to set up monitor on 500 errors.

Author/Reviewer Checklist

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[coderabbitai]

Walkthrough

The update involves enhancing the tracking of response code statistics within an application. Specifically, it adds a new line of code to increment a statistics counter with a uniquely modified key. This action occurs within the response.on('finish') event callback, ensuring that the additional data tracking is executed once the response process concludes, thereby offering more granular insights into the application's response behaviors.

Changes

File Path	Change Summary
.../comlink/src/request-helpers/export-response-code-stats.ts	Added an extra stats.increment call with a unique key in the response.on('finish') callback.

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Review Status

Actionable comments generated: 0

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between 454cb0c and c7b4038.

Files selected for processing (1)

• indexer/services/comlink/src/request-helpers/export-response-code-stats.ts (1 hunks)

Additional comments: 2

indexer/services/comlink/src/request-helpers/export-response-code-stats.ts (2)

• 18-19: The addition of a new stats.increment call with a modified key is a good approach to aggregate response code statistics at a different granularity. This should enhance the monitoring and debugging capabilities of the comlink service by providing more detailed insights into response codes.

However, it's important to consider the potential impact on performance due to the additional tracking. Ensure that this does not introduce significant overhead, especially under high load conditions. Additionally, verify that the data collected by this new metric does not duplicate information that is already being captured, to maintain efficiency in data storage and analysis.

• 15-22: > 📝 NOTE

This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [1-19]

The middleware function is well-structured and logically sound. It effectively uses the response.on('finish') event to track response codes, which is a suitable approach for this purpose. The use of config.SERVICE_NAME and options?.controllerName in the metric key is commendable, as it ensures that metrics are appropriately namespaced, enhancing clarity and maintainability.

Ensure that thorough testing is conducted, especially to verify that the middleware behaves as expected under various scenarios, including error responses and high load conditions. This will help in identifying any potential issues early on.