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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
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.conn;
import ch.boye.httpclientandroidlib.HttpResponse;
import ch.boye.httpclientandroidlib.protocol.HttpContext;
/**
* Interface for deciding how long a connection can remain
* idle before being reused.
* <p>
* Implementations of this interface must be thread-safe. Access to shared
* data must be synchronized as methods of this interface may be executed
* from multiple threads.
*
* @since 4.0
*/
public interface ConnectionKeepAliveStrategy {
/**
* Returns the duration of time which this connection can be safely kept
* idle. If the connection is left idle for longer than this period of time,
* it MUST not reused. A value of 0 or less may be returned to indicate that
* there is no suitable suggestion.
*
* When coupled with a {@link ch.boye.httpclientandroidlib.ConnectionReuseStrategy}, if
* {@link ch.boye.httpclientandroidlib.ConnectionReuseStrategy#keepAlive(
* HttpResponse, HttpContext)} returns true, this allows you to control
* how long the reuse will last. If keepAlive returns false, this should
* have no meaningful impact
*
* @param response
* The last response received over the connection.
* @param context
* the context in which the connection is being used.
*
* @return the duration in ms for which it is safe to keep the connection
* idle, or <=0 if no suggested duration.
*/
long getKeepAliveDuration(HttpResponse response, HttpContext context);
}
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