/*
 * MIT License
 *
 * Copyright (c) 2020-present Cloudogu GmbH and Contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package sonia.scm.sse;

import com.google.common.annotations.VisibleForTesting;

import javax.inject.Singleton;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Function;

@Singleton
public class ChannelRegistry {

  private final Map<Object, Channel> channels = new ConcurrentHashMap<>();
  private final Function<Object, Channel> channelFactory;

  public ChannelRegistry() {
    this(Channel::new);
  }

  @VisibleForTesting
  ChannelRegistry(Function<Object, Channel> channelFactory) {
    this.channelFactory = channelFactory;
  }

  public Channel channel(Object channelId) {
    return channels.computeIfAbsent(channelId, channelFactory);
  }

  void removeClosedClients() {
    channels.values().forEach(Channel::removeClosedOrTimeoutClients);
  }
}
