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/*
*
* Copyright 2021 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 ringhash
import "context"
type clusterKey struct{}
func getRequestHash(ctx context.Context) uint64 {
requestHash, _ := ctx.Value(clusterKey{}).(uint64)
return requestHash
}
// GetRequestHashForTesting returns the request hash in the context; to be used
// for testing only.
func GetRequestHashForTesting(ctx context.Context) uint64 {
return getRequestHash(ctx)
}
// SetRequestHash adds the request hash to the context for use in Ring Hash Load
// Balancing.
func SetRequestHash(ctx context.Context, requestHash uint64) context.Context {
return context.WithValue(ctx, clusterKey{}, requestHash)
}
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