content: /*
   * Copyright <2019> Amazon.com, Inc. or its affiliates. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License").
   * You may not use this file except in compliance with the License.
   * A copy of the License is located at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * or in the "license" file accompanying this file. This file 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.
   *
   */
  
  /*
   * ====================================================================
   * 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
   * <http://www.apache.org/>.
   *
   */
  
  package com.amazon.opendistroforelasticsearch.jdbc.transport.http;
  
  import org.apache.commons.logging.Log;
  import org.apache.http.HttpRequest;
  import org.apache.http.HttpResponse;
  import org.apache.http.annotation.Contract;
  import org.apache.http.annotation.ThreadingBehavior;
  import org.apache.http.config.ConnectionConfig;
  import org.apache.http.conn.HttpConnectionFactory;
  import org.apache.http.conn.ManagedHttpClientConnection;
  import org.apache.http.conn.routing.HttpRoute;
  import org.apache.http.entity.ContentLengthStrategy;
  import org.apache.http.impl.conn.DefaultHttpResponseParserFactory;
  import org.apache.http.impl.entity.LaxContentLengthStrategy;
  import org.apache.http.impl.entity.StrictContentLengthStrategy;
  import org.apache.http.impl.io.DefaultHttpRequestWriterFactory;
  import org.apache.http.io.HttpMessageParserFactory;
  import org.apache.http.io.HttpMessageWriterFactory;
  
  import java.nio.charset.Charset;
  import java.nio.charset.CharsetDecoder;
  import java.nio.charset.CharsetEncoder;
  import java.nio.charset.CodingErrorAction;
  import java.util.concurrent.atomic.AtomicLong;
  
  /**
   * Adapted from Apache HttpClient to serve as a Factory for
   * {@link ManagedHttpClientConnection} instances that offer per
   * connection HTTP wire logging.
   *
   */
  @Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL)
  public class ApacheHttpClientConnectionFactory
          implements HttpConnectionFactory<HttpRoute, ManagedHttpClientConnection> {
  
      private static final AtomicLong COUNTER = new AtomicLong();
  
      private Log log;
  
      private final HttpMessageWriterFactory<HttpRequest> requestWriterFactory;
      private final HttpMessageParserFactory<HttpResponse> responseParserFactory;
      private final ContentLengthStrategy incomingContentStrategy;
      private final ContentLengthStrategy outgoingContentStrategy;
  
      /**
       * @since 4.4
       */
      public ApacheHttpClientConnectionFactory(
              final HttpMessageWriterFactory<HttpRequest> requestWriterFactory,
              final HttpMessageParserFactory<HttpResponse> responseParserFactory,
              final ContentLengthStrategy incomingContentStrategy,
              final ContentLengthStrategy outgoingContentStrategy) {
          super();
          this.requestWriterFactory = requestWriterFactory != null ? requestWriterFactory :
                  DefaultHttpRequestWriterFactory.INSTANCE;
          this.responseParserFactory = responseParserFactory != null ? responseParserFactory :
                  DefaultHttpResponseParserFactory.INSTANCE;
          this.incomingContentStrategy = incomingContentStrategy != null ? incomingContentStrategy :
                  LaxContentLengthStrategy.INSTANCE;
          this.outgoingContentStrategy = outgoingContentStrategy != null ? outgoingContentStrategy :
                  StrictContentLengthStrategy.INSTANCE;
      }
  
      public ApacheHttpClientConnectionFactory(
              final HttpMessageWriterFactory<HttpRequest> requestWriterFactory,
              final HttpMessageParserFactory<HttpResponse> responseParserFactory) {
          this(requestWriterFactory, responseParserFactory, null, null);
      }
  
      public ApacheHttpClientConnectionFactory(
              final HttpMessageParserFactory<HttpResponse> responseParserFactory) {
          this(null, responseParserFactory);
      }
  
      public ApacheHttpClientConnectionFactory() {
          this(null, null);
      }
  
      public ApacheHttpClientConnectionFactory(Log log) {
          this(null, null);
          this.log = log;
      }
  
      @Override
      public ManagedHttpClientConnection create(final HttpRoute route, final ConnectionConfig config) {
          final ConnectionConfig cconfig = config != null ? config : ConnectionConfig.DEFAULT;
          CharsetDecoder chardecoder = null;
          CharsetEncoder charencoder = null;
          final Charset charset = cconfig.getCharset();
          final CodingErrorAction malformedInputAction = cconfig.getMalformedInputAction() != null ?
                  cconfig.getMalformedInputAction() : CodingErrorAction.REPORT;
          final CodingErrorAction unmappableInputAction = cconfig.getUnmappableInputAction() != null ?
                  cconfig.getUnmappableInputAction() : CodingErrorAction.REPORT;
          if (charset != null) {
              chardecoder = charset.newDecoder();
              chardecoder.onMalformedInput(malformedInputAction);
              chardecoder.onUnmappableCharacter(unmappableInputAction);
              charencoder = charset.newEncoder();
              charencoder.onMalformedInput(malformedInputAction);
              charencoder.onUnmappableCharacter(unmappableInputAction);
          }
          final String id = "http-outgoing-" + Long.toString(COUNTER.getAndIncrement());
          return new LoggingManagedHttpClientConnection(
                  id,
                  log,
                  cconfig.getBufferSize(),
                  cconfig.getFragmentSizeHint(),
                  chardecoder,
                  charencoder,
                  cconfig.getMessageConstraints(),
                  incomingContentStrategy,
                  outgoingContentStrategy,
                  requestWriterFactory,
                  responseParserFactory);
      }
  
  }
  