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Core components to access jclouds services

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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 org.jclouds.http;

import java.io.IOException;

import org.jclouds.http.handlers.BackoffLimitedRetryHandler;

import com.google.inject.ImplementedBy;

@ImplementedBy(BackoffLimitedRetryHandler.class)
public interface IOExceptionRetryHandler {

   IOExceptionRetryHandler ALWAYS_RETRY = new IOExceptionRetryHandler() {
      public boolean shouldRetryRequest(HttpCommand command, IOException response) {
         return true;
      }

      @Override
      public String toString() {
         return "ALWAYS_RETRY";
      }
   };

   IOExceptionRetryHandler NEVER_RETRY = new IOExceptionRetryHandler() {
      public boolean shouldRetryRequest(HttpCommand command, IOException response) {
         return false;
      }

      @Override
      public String toString() {
         return "NEVER_RETRY";
      }
   };

   boolean shouldRetryRequest(HttpCommand command, IOException error);
}