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[prayagupa]

Logging a service

• eventId
• timestamp
• eventtype(Processing, Transforming, Responding)
• whole cause

https://twitter.com/kenny_baas/status/844450238987415552

eventtypes to log

Request
EventProcessed
EventProcessingFailed or MyApplicationException1
TimeTaken
Response

https://logging.apache.org/log4j/2.x/manual/appenders.html

Errors to alert on

MyApplicationException1 (could not write to stream)
MyApplicationException2 (RuntimeTransformationError)

ClientException(bad request) - low priority

Store log-events in some sort of storage like Elasticsearch, MongoDB where you can query
to make sure for particular eventId, things are working fine or there's error.

https://github.com/nihil-os/log4j2-elasticsearch