| 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.atmos.handlers; |
| 20 | |
| 21 | import javax.annotation.Resource; |
| 22 | import javax.inject.Named; |
| 23 | |
| 24 | import org.jclouds.Constants; |
| 25 | import org.jclouds.atmos.domain.AtmosError; |
| 26 | import org.jclouds.atmos.util.AtmosUtils; |
| 27 | import org.jclouds.http.HttpCommand; |
| 28 | import org.jclouds.http.HttpException; |
| 29 | import org.jclouds.http.HttpResponse; |
| 30 | import org.jclouds.http.HttpRetryHandler; |
| 31 | import org.jclouds.http.HttpUtils; |
| 32 | import org.jclouds.http.handlers.BackoffLimitedRetryHandler; |
| 33 | import org.jclouds.logging.Logger; |
| 34 | |
| 35 | import com.google.inject.Inject; |
| 36 | |
| 37 | /** |
| 38 | * Handles Retryable responses with error codes in the 4xx range |
| 39 | * |
| 40 | * @author Adrian Cole |
| 41 | */ |
| 42 | public class AtmosClientErrorRetryHandler implements HttpRetryHandler { |
| 43 | private final AtmosUtils utils; |
| 44 | private final BackoffLimitedRetryHandler backoffHandler; |
| 45 | |
| 46 | @Inject |
| 47 | public AtmosClientErrorRetryHandler(BackoffLimitedRetryHandler backoffHandler, |
| 48 | AtmosUtils utils) { |
| 49 | this.backoffHandler = backoffHandler; |
| 50 | this.utils = utils; |
| 51 | } |
| 52 | |
| 53 | @Inject(optional = true) |
| 54 | @Named(Constants.PROPERTY_MAX_RETRIES) |
| 55 | private int retryCountLimit = 5; |
| 56 | @Resource |
| 57 | protected Logger logger = Logger.NULL; |
| 58 | |
| 59 | public boolean shouldRetryRequest(HttpCommand command, HttpResponse response) { |
| 60 | if (command.getFailureCount() > retryCountLimit) |
| 61 | return false; |
| 62 | if (response.getStatusCode() == 404 && command.getCurrentRequest().getMethod().equals("DELETE")) { |
| 63 | command.incrementFailureCount(); |
| 64 | return true; |
| 65 | } else if (response.getStatusCode() == 409 || response.getStatusCode() == 400) { |
| 66 | byte[] content = HttpUtils.closeClientButKeepContentStream(response); |
| 67 | // Content can be null in the case of HEAD requests |
| 68 | if (content != null) { |
| 69 | try { |
| 70 | AtmosError error = utils.parseAtmosErrorFromContent(command, response, |
| 71 | new String(content)); |
| 72 | if (error.getCode() == 1016) { |
| 73 | return backoffHandler.shouldRetryRequest(command, response); |
| 74 | } |
| 75 | // don't increment count before here, since backoff handler does already |
| 76 | command.incrementFailureCount(); |
| 77 | } catch (HttpException e) { |
| 78 | logger.warn(e, "error parsing response: %s", new String(content)); |
| 79 | } |
| 80 | } else { |
| 81 | command.incrementFailureCount(); |
| 82 | } |
| 83 | return true; |
| 84 | } |
| 85 | return false; |
| 86 | } |
| 87 | |
| 88 | } |