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template, use ByteBuffer[] for performance?
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mongo: collect mongo stats thru JMX ConnectionPoolStatisticsMBean?
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mongo: update entity decoder to use switch(fieldName) to replace if statement? (optimization)
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framework error (queue listener, background task error, custom scheduler trigger) forward to kafka?
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change gradle to kotlin?
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impl own json bind by referring https://github.com/json-iterator/java and https://github.com/ngs-doo/dsl-json with annotation processor?
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/_sys/, kafka controller, should call message handler directly?
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revisit trace log truncation, better/more elegant handling?
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elasticsearch libs has too many duplicated namespaces with module-info.java enabled
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redis using ping/pong to validate connection? for zero downtime upgrading e.g. with gcloud memory store
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websocket, replace AbstractReceiveListener, so it can include IO/error handling within action lifecycle?
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provide general support/framework for backend-test/regression-test/load-test?
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monitor: alert on kafka message api_changed? always publish api, not only for frontend?
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action visualization to show service flow/dependency diagram?