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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  package org.apache.http.client;
28  
29  import org.apache.http.conn.routing.HttpRoute;
30  
31  /**
32   * Represents a controller that dynamically adjusts the size
33   * of an available connection pool based on feedback from
34   * using the connections.
35   *
36   * @since 4.2
37   *
38   */
39  public interface BackoffManager {
40  
41      /**
42       * Called when we have decided that the result of
43       * using a connection should be interpreted as a
44       * backoff signal.
45       */
46      public void backOff(HttpRoute route);
47  
48      /**
49       * Called when we have determined that the result of
50       * using a connection has succeeded and that we may
51       * probe for more connections.
52       */
53      public void probe(HttpRoute route);
54  }