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// Copyright 2022 Google LLC
//
// 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 internalregistry provides a container for functionality that is required
// across Tink similar to the `registry` but isn't part of the public API.
package internalregistry
import (
"fmt"
"sync"
"github.com/tink-crypto/tink-go/v2/monitoring"
)
var (
monitoringClientMu sync.RWMutex
monitoringClient monitoring.Client = defaultClient
)
type doNothingLogger struct{}
var _ monitoring.Logger = (*doNothingLogger)(nil)
func (l *doNothingLogger) Log(uint32, int) {}
func (l *doNothingLogger) LogFailure() {}
var defaultLogger = &doNothingLogger{}
type doNothingClient struct{}
var _ monitoring.Client = (*doNothingClient)(nil)
func (c *doNothingClient) NewLogger(*monitoring.Context) (monitoring.Logger, error) {
return defaultLogger, nil
}
var defaultClient = &doNothingClient{}
// RegisterMonitoringClient registers a client that can create loggers.
func RegisterMonitoringClient(client monitoring.Client) error {
monitoringClientMu.Lock()
defer monitoringClientMu.Unlock()
if monitoringClient != nil && monitoringClient != defaultClient {
return fmt.Errorf("monitoring client is already registered")
}
monitoringClient = client
return nil
}
// ClearMonitoringClient removes the registered monitoring client.
func ClearMonitoringClient() {
monitoringClientMu.Lock()
defer monitoringClientMu.Unlock()
monitoringClient = defaultClient
}
// GetMonitoringClient returns the registered monitoring client.
func GetMonitoringClient() monitoring.Client {
return monitoringClient
}
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