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credentialsProvider.go
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credentialsProvider.go
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// Copyright © 2018 Camunda Services GmbH (info@camunda.com)
//
// 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 zbc
import "context"
// CredentialsProvider is responsible for adding credentials to each gRPC call's headers.
type CredentialsProvider interface {
// Takes a map of gRPC headers as defined in credentials.PerRPCCredentials and adds credentials to them.
ApplyCredentials(ctx context.Context, headers map[string]string) error
// Returns true if the request should be retried, false otherwise.
ShouldRetryRequest(ctx context.Context, err error) bool
}
// noopCredentialsProvider implements the CredentialsProvider interface but doesn't modify the authorization headers and
// doesn't retry requests in case of failure.
type noopCredentialsProvider struct{}
// ApplyCredentials does nothing.
func (noopCredentialsProvider) ApplyCredentials(_ context.Context, _ map[string]string) error {
return nil
}
// ShouldRetryRequest always returns false.
func (noopCredentialsProvider) ShouldRetryRequest(_ context.Context, _ error) bool {
return false
}