Synchronize goroutines within GetToken#20367
Merged
chlowell merged 4 commits intorelease/azidentity-1.3.0-betafrom Mar 8, 2023
Merged
Synchronize goroutines within GetToken#20367chlowell merged 4 commits intorelease/azidentity-1.3.0-betafrom
chlowell merged 4 commits intorelease/azidentity-1.3.0-betafrom
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jhendrixMSFT
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Mar 8, 2023
jhendrixMSFT
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Mar 8, 2023
jhendrixMSFT
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Mar 8, 2023
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Sharing a credential instance among goroutines can produce redundant token requests because goroutines may race to populate the credential's cache. This PR refactors
GetToken()into two callbacks, one for silent auth (checking the cache) and one for requesting a new token, and adds a newsyncertype to synchronize them. (Credentials that don't distinguish checking the cache from requesting a token use the same method for both callbacks.) Credentials will allow only one goroutine to authenticate at a time, and waiting goroutines will check the cache again when they wake up. Closes #20044