/*
 * Copyright (C) 2016 The Dagger 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 dagger.functional.producers.monitoring;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.inject.Inject;
import javax.inject.Singleton;

@Singleton
final class ThreadAccumulator {
  private final Map<String, Long> threadIds = new ConcurrentHashMap<>();

  @Inject
  ThreadAccumulator() {}

  void markThread(String name) {
    threadIds.put(name, Thread.currentThread().getId());
  }

  long threadId(String name) {
    return threadIds.get(name);
  }
}