package limiter provides primatives for limiting the number of concurrent operations in-flight.

ContextWithQueryOptions returns a context with the given query options attached.

GRPCMetadataFromQueryMeta returns a metadata struct with fields from the structs.QueryMeta attached.

NewServer constructs a gRPC server for the external gRPC port, to which handlers can be registered.

QueryMetaFromGRPCMeta returns a structs.QueryMeta struct parsed from the metadata.MD, such as from a gRPC header or trailer.

QueryOptionsFromContext returns the query options in the gRPC metadata attached to the given context.

RequireAnyValidACLToken checks that the caller provided a valid ACL token without requiring any specific permissions.

We tag logs with a unique identifier to ease debugging.