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/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 okhttp3;

import java.util.concurrent.TimeUnit;
import okhttp3.internal.connection.RealConnectionPool;

/**
 * Manages reuse of HTTP and HTTP/2 connections for reduced network latency. HTTP requests that
 * share the same {@link Address} may share a {@link Connection}. This class implements the policy
 * of which connections to keep open for future use.
 */
public final class ConnectionPool {
  final RealConnectionPool delegate;

  /**
   * Create a new connection pool with tuning parameters appropriate for a single-user application.
   * The tuning parameters in this pool are subject to change in future OkHttp releases. Currently
   * this pool holds up to 5 idle connections which will be evicted after 5 minutes of inactivity.
   */
  public ConnectionPool() {
    this(5, 5, TimeUnit.MINUTES);
  }

  public ConnectionPool(int maxIdleConnections, long keepAliveDuration, TimeUnit timeUnit) {
    this.delegate = new RealConnectionPool(maxIdleConnections, keepAliveDuration, timeUnit);
  }

  /** Returns the number of idle connections in the pool. */
  public int idleConnectionCount() {
    return delegate.idleConnectionCount();
  }

  /** Returns total number of connections in the pool. */
  public int connectionCount() {
    return delegate.connectionCount();
  }

  /** Close and remove all idle connections in the pool. */
  public void evictAll() {
    delegate.evictAll();
  }
}