repo_description: The Go language implementation of gRPC. HTTP/2 based RPC
repo_topics: dogs-over-cats giant-robots go golang grpc hacktoberfest microservices not-nanoservices proto rpc
code: /*
   * Copyright 2019 gRPC authors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  // Package balancerload defines APIs to parse server loads in trailers. The
  // parsed loads are sent to balancers in DoneInfo.
  package balancerload
  
  import (
  	"google.golang.org/grpc/metadata"
  )
  
  // Parser converts loads from metadata into a concrete type.
  type Parser interface {
  	// Parse parses loads from metadata.
  	Parse(md metadata.MD) any
  }
  
  var parser Parser
  
  // SetParser sets the load parser.
  //
  // Not mutex-protected, should be called before any gRPC functions.
  func SetParser(lr Parser) {
  	parser = lr
  }
  
  // Parse calls parser.Read().
  func Parse(md metadata.MD) any {
  	if parser == nil {
  		return nil
  	}
  	return parser.Parse(md)
  }
  