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Moonchild
53 lines
2.0 KiB
Java
53 lines
2.0 KiB
Java
/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.client.cache;
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import java.io.IOException;
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/**
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* Used for atomically updating entries in a {@link HttpCacheStorage}
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* implementation. The current entry (if any) is fed into an implementation
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* of this interface, and the new, possibly updated entry (if any)
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* should be returned.
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*/
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public interface HttpCacheUpdateCallback {
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/**
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* Returns the new cache entry that should replace an existing one.
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*
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* @param existing
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* the cache entry currently in-place in the cache, possibly
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* <code>null</code> if nonexistent
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* @return the cache entry that should replace it, again,
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* possibly <code>null</code> if the entry should be deleted
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*
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* @since 4.1
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*/
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HttpCacheEntry update(HttpCacheEntry existing) throws IOException;
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}
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