TranslClient: Use new translib subscription APIs #122
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Added gnmipb.Notification as a member of the Value messgae object defined by sonic_internal.proto. Data clients now can fill a complete Notification object instead of timestamp, path, TypedValue separately.
Use TranslClient to handle the subscribe requests when origin is "openconfig". Fallback to the existing target based identification logic if origin is not given.
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StreamRun() enhancements: - Create a new SubscribeSession in the beginning and pass it to all further translib API calls - Call translib.IsSubscribeSupported() to reasolve preferences of the requested paths. This also splits the target_defined request into on_change and sample paths. - Use one translib.Subscribe() call passing all on_change enabled paths, if there are any. This will handle initial updates and subsequent on_change notifications. - Use one translib.Stream() call for each sample subscribe path, if present. This will be called in a loop at every sample interval. - Maintain the ygot objects received for each translib.Stream() call in a cache. Diff the current set of objects with the objects from the previous iteration to resolve deleted paths and modified values (when suppress_redundant is enabled). PollRun() and OnceRun() enhancements: - Call translib.Stream() with each subscribed path to generate notification data. - In poll mode, this is repeated when a poll message is received
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anand-kumar-subramanian
approved these changes
Jun 16, 2023
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Why I did it
PR sonic-net/sonic-mgmt-common#92 modified the translib APIs to implement the new subscription feature (HLD sonic-net/SONiC#1287). The gNMI server code also needs to be changed accordingly.
How I did it
TranslClientto use the new translib subscription APIsTranslClientfor handling subscription when theoriginis set to "openconfig". Existingtargetbased handling will be used whenoriginis not specifiedThis PR requires sonic-net/sonic-mgmt-common#92 to be merged first.
How to verify it
Verified subscription for openconfig-interfaces and openconfig-acl paths
Which release branch to backport (provide reason below if selected)
Description for the changelog
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)