001/*
002 * ====================================================================
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *   http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied.  See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 * ====================================================================
020 *
021 * This software consists of voluntary contributions made by many
022 * individuals on behalf of the Apache Software Foundation.  For more
023 * information on the Apache Software Foundation, please see
024 * <http://www.apache.org/>.
025 *
026 */
027package org.apache.http.client;
028
029import org.apache.http.conn.routing.HttpRoute;
030
031/**
032 * Represents a controller that dynamically adjusts the size
033 * of an available connection pool based on feedback from
034 * using the connections.
035 *
036 * @since 4.2
037 *
038 */
039public interface BackoffManager {
040
041    /**
042     * Called when we have decided that the result of
043     * using a connection should be interpreted as a
044     * backoff signal.
045     */
046    public void backOff(HttpRoute route);
047
048    /**
049     * Called when we have determined that the result of
050     * using a connection has succeeded and that we may
051     * probe for more connections.
052     */
053    public void probe(HttpRoute route);
054}