org.apache.http.client.cache
Interface HttpCacheUpdateCallback

public interface HttpCacheUpdateCallback

Used for atomically updating entries in a HttpCacheStorage implementation. The current entry (if any) is fed into an implementation of this interface, and the new, possibly updated entry (if any) should be returned.

Method Summary

HttpCacheEntry

update(HttpCacheEntry existing) Returns the new cache entry that should replace an existing one.

Method Detail

update

HttpCacheEntry update(HttpCacheEntry existing)
                      throws IOException

Returns the new cache entry that should replace an existing one.

Parameters:

existing - the cache entry currently in-place in the cache, possibly null if nonexistent

Returns:

the cache entry that should replace it, again, possibly null if the entry should be deleted

Throws:

IOException

Since:

4.1