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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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
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  package org.apache.hc.client5.http.examples;
  
  import java.util.concurrent.Future;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.hc.client5.http.async.methods.SimpleHttpRequest;
  import org.apache.hc.client5.http.async.methods.SimpleHttpResponse;
  import org.apache.hc.client5.http.async.methods.SimpleRequestBuilder;
  import org.apache.hc.client5.http.async.methods.SimpleRequestProducer;
  import org.apache.hc.client5.http.async.methods.SimpleResponseConsumer;
  import org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient;
  import org.apache.hc.client5.http.impl.async.HttpAsyncClients;
  import org.apache.hc.core5.concurrent.FutureCallback;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.message.StatusLine;
  import org.apache.hc.core5.io.CloseMode;
  import org.apache.hc.core5.reactor.IOReactorConfig;
  import org.apache.hc.core5.util.TimeValue;
  import org.apache.hc.core5.util.Timeout;
  
  /**
   * Example demonstrating how to evict expired and idle connections
   * from the connection pool.
   */
  public class AsyncClientConnectionEviction {
  
      public static void main(final String[] args) throws Exception {
  
          final IOReactorConfig ioReactorConfig = IOReactorConfig.custom()
                  .setSoTimeout(Timeout.ofSeconds(5))
                  .build();
  
          final CloseableHttpAsyncClient client = HttpAsyncClients.custom()
                  .setIOReactorConfig(ioReactorConfig)
                  .evictExpiredConnections()
                  .evictIdleConnections(TimeValue.ofSeconds(10))
                  .build();
  
          client.start();
  
          final SimpleHttpRequest request = SimpleRequestBuilder.get()
                  .setHttpHost(new HttpHost("httpbin.org"))
                  .setPath("/")
                  .build();
  
          System.out.println("Executing request " + request);
          final Future<SimpleHttpResponse> future1 = client.execute(
                  SimpleRequestProducer.create(request),
                  SimpleResponseConsumer.create(),
                  new FutureCallback<SimpleHttpResponse>() {
  
                      @Override
                      public void completed(final SimpleHttpResponse response) {
                          System.out.println(request + "->" + new StatusLine(response));
                          System.out.println(response.getBody());
                      }
  
                      @Override
                      public void failed(final Exception ex) {
                          System.out.println(request + "->" + ex);
                      }
  
                      @Override
                      public void cancelled() {
                          System.out.println(request + " cancelled");
                      }
  
                  });
  
          future1.get();
  
          Thread.sleep(TimeUnit.SECONDS.toMillis(30));
  
         // Previous connection should get evicted from the pool by now
 
         final Future<SimpleHttpResponse> future2 = client.execute(
                 request,
                 new FutureCallback<SimpleHttpResponse>() {
 
                     @Override
                     public void completed(final SimpleHttpResponse response) {
                         System.out.println(request + "->" + new StatusLine(response));
                         System.out.println(response.getBody());
                     }
 
                     @Override
                     public void failed(final Exception ex) {
                         System.out.println(request + "->" + ex);
                     }
 
                     @Override
                     public void cancelled() {
                         System.out.println(request + " cancelled");
                     }
 
                 });
 
         future2.get();
 
         System.out.println("Shutting down");
         client.close(CloseMode.GRACEFUL);
     }
 
 }