1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package org.apache.http.client;
29
30 import org.apache.http.HttpResponse;
31 import org.apache.http.protocol.HttpContext;
32
33 /**
34 * Strategy interface that allows API users to plug in their own logic to
35 * control whether or not a retry should automatically be done, how many times
36 * it should be retried and so on.
37 *
38 * @since 4.2
39 */
40 public interface ServiceUnavailableRetryStrategy {
41
42 /**
43 * Determines if a method should be retried given the response from the target server.
44 *
45 * @param response the response from the target server
46 * @param executionCount the number of times this method has been
47 * unsuccessfully executed
48 * @param context the context for the request execution
49
50 * @return {@code true} if the method should be retried, {@code false}
51 * otherwise
52 */
53 boolean retryRequest(HttpResponse response, int executionCount, HttpContext context);
54
55 /**
56 * @return The interval between the subsequent auto-retries.
57 */
58 long getRetryInterval();
59
60 }