com.google.crypto.tink.internal.MutableMonitoringRegistry Maven / Gradle / Ivy
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Tink is a small cryptographic library that provides a safe, simple, agile and fast way to accomplish some common cryptographic tasks.
// 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 com.google.crypto.tink.internal;
import java.util.concurrent.atomic.AtomicReference;
/**
* A Registry for MonitoringClient.
*/
public final class MutableMonitoringRegistry {
private static final MutableMonitoringRegistry GLOBAL_INSTANCE =
new MutableMonitoringRegistry();
public static MutableMonitoringRegistry globalInstance() {
return GLOBAL_INSTANCE;
}
private static class DoNothingClient implements MonitoringClient {
@Override
public MonitoringClient.Logger createLogger(
MonitoringKeysetInfo keysetInfo, String primitive, String api) {
return MonitoringUtil.DO_NOTHING_LOGGER;
}
}
private static final DoNothingClient DO_NOTHING_CLIENT = new DoNothingClient();
private final AtomicReference monitoringClient = new AtomicReference<>();
public synchronized void clear() {
monitoringClient.set(null);
}
public synchronized void registerMonitoringClient(MonitoringClient client) {
if (monitoringClient.get() != null) {
throw new IllegalStateException("a monitoring client has already been registered");
}
monitoringClient.set(client);
}
public MonitoringClient getMonitoringClient() {
MonitoringClient client = monitoringClient.get();
if (client == null) {
return DO_NOTHING_CLIENT;
}
return client;
}
public MutableMonitoringRegistry() {}
}
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