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/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */
package com.facebook.presto.jdbc.internal.apache.http.client;

import com.facebook.presto.jdbc.internal.apache.http.conn.routing.HttpRoute;

/**
 * Represents a controller that dynamically adjusts the size
 * of an available connection pool based on feedback from
 * using the connections.
 *
 * @since 4.2
 *
 */
public interface BackoffManager {

    /**
     * Called when we have decided that the result of
     * using a connection should be interpreted as a
     * backoff signal.
     */
    public void backOff(HttpRoute route);

    /**
     * Called when we have determined that the result of
     * using a connection has succeeded and that we may
     * probe for more connections.
     */
    public void probe(HttpRoute route);
}