NAME

XAO::DO::Cache::Memory - memory storage back-end for XAO::Cache

SYNOPSIS

You should not use this object directly, it is a back-end for XAO::Cache.

DESCRIPTION

Cache::Memory is the default implementation of XAO::Cache back-end. It stores data in memory.

METHODS

calculate_size ($)

Calculates size in bytes of the given reference.

drop (@)

Drops an element from the cache.

drop_all ($)

Drops all elements.

get (\@)

Retrieves an element from the cache. Does not check if it is expired or not, that is done in exists() method and does not update access time.

make_key (\@)

Makes a key from the given list of coordinates.

put (\@\$)

Add a new element to the cache; before adding it checks cache size and throws out elements to make space for the new element. Order of removal depends on when an element was accessed last.

setup (%)

Sets expiration time and maximum cache size.

PRIVATE METHODS

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drop_oldest ($)

Drops oldest element from the cache using supplied key and element.

print_chain ()

Prints cache as a chain from the most recent to the least recent. The order is most_recent->next->...->next->least_recent.

touch ($)

Private method that updates access time and moves an element to the most recent position.

AUTHORS

Copyright (c) 2002 XAO Inc.

Andrew Maltsev <am@xao.com>.

SEE ALSO

Have a look at: XAO::DO::Cache::Memory, XAO::Objects, XAO::Base, XAO::FS, XAO::Web.