| 1 | /** |
| 2 | * |
| 3 | * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com> |
| 4 | * |
| 5 | * ==================================================================== |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | * ==================================================================== |
| 18 | */ |
| 19 | package org.jclouds.http; |
| 20 | |
| 21 | /** |
| 22 | * Indicate whether a request should be retried after a server error response (HTTP status code >= |
| 23 | * 500) based on the request's replayable status and the number of attempts already performed. |
| 24 | * |
| 25 | * @author James Murty |
| 26 | */ |
| 27 | public interface HttpRetryHandler { |
| 28 | public static final HttpRetryHandler ALWAYS_RETRY = new HttpRetryHandler() { |
| 29 | public boolean shouldRetryRequest(HttpCommand command, HttpResponse response) { |
| 30 | return true; |
| 31 | } |
| 32 | |
| 33 | @Override |
| 34 | public String toString() { |
| 35 | return "ALWAYS_RETRY"; |
| 36 | } |
| 37 | }; |
| 38 | |
| 39 | public static final HttpRetryHandler NEVER_RETRY = new HttpRetryHandler() { |
| 40 | public boolean shouldRetryRequest(HttpCommand command, HttpResponse response) { |
| 41 | return false; |
| 42 | } |
| 43 | |
| 44 | @Override |
| 45 | public String toString() { |
| 46 | return "NEVER_RETRY"; |
| 47 | } |
| 48 | }; |
| 49 | |
| 50 | /** |
| 51 | * Return true if the command should be retried. This method should only be invoked when the |
| 52 | * response has failed with a HTTP 5xx error indicating a server-side error. |
| 53 | */ |
| 54 | boolean shouldRetryRequest(HttpCommand command, HttpResponse response); |
| 55 | } |