mirror of https://github.com/grpc/grpc-java.git
83b92cfc9f
This will be a new override. The old override is now deprecated. In order to pass new information without adding new overrides, I shoved most information into an object called StreamInfo. The Metadata is left out to draw attention because it's mutable. Motivation: this is needed for correctly supporting pick_first in GRPCLB. GRPCLB needs to add a token to the headers, and the token varies among servers. With round_robin, GRPCLB create a Subchannel for each server, thus can attach the token when the Subchannel is picked. To implement pick_first, all server addresses will be put in a single Subchannel, we will need to add the header in newClientStreamTracer(), by looking up the server address from the transport attributes and deciding which token to add. |
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