content: /*
   * Copyright 2010 Proofpoint, Inc.
   *
   * 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 io.airlift.http.client;
  
  import com.google.common.util.concurrent.ListenableFuture;
  
  import java.io.Closeable;
  
  public interface HttpClient
          extends Closeable
  {
      <T, E extends Exception> T execute(Request request, ResponseHandler<T, E> responseHandler)
              throws E;
  
      <T, E extends Exception> HttpResponseFuture<T> executeAsync(Request request, ResponseHandler<T, E> responseHandler);
  
      StreamingResponse executeStreaming(Request request);
  
      RequestStats getStats();
  
      @Override
      void close();
  
      boolean isClosed();
  
      interface HttpResponseFuture<T>
              extends ListenableFuture<T>
      {
          /**
           * State for diagnostics.  Do not rely on values from this method.
           */
          String getState();
      }
  }
  