• Fix issue where EnableMessageOrdering wasn't being parsed properly to SubscriptionConfig.


  • Fix issue where subscriber streams were limited because it was using a single grpc conn.
    • As a side effect, publisher and subscriber grpc conns are no longer shared.
  • Add fake time function in pstest.
  • Add support for server side flow control.


  • Add support for subscription detachment.
  • Add support for message filtering in subscriptions.
  • Add support for RetryPolicy (server-side feature).
  • Fix publish error path when ordering key is disabled.
  • Fix panic on Topic.ResumePublish method.


  • Add support for upcoming ordering keys feature.


  • Fix bug with removing dead letter policy from a subscription
  • Set default value of MaxExtensionPeriod to 0, which is functionally equivalent


  • Update to v0.54.0


  • Add support for upcoming dead letter topics feature
  • Expose Subscription.ReceiveSettings.MaxExtensionPeriod setting
  • Standardize default settings with other client libraries
    • Increase publish delay threshold from 1ms to 10ms
    • Increase subscription MaxExtension from 10m to 60m
  • Always send keepalive/heartbeat ping on StreamingPull streams to minimize stream reopen requests


  • Limit default grpc connections to 4.
  • Fix issues with OpenCensus metric for pull count not including synchronous pull messages.
  • Fix issue with publish bundle size calculations.
  • Add ClearMessages method to pstest server.


Small fix to a package name.


This is the first tag to carve out pubsub as its own module. See: