Editing API:EPrints/DataObj/Cachemap

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==NAME==
'''EPrints::DataObj::Cachemap''' - Cache tables

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==DESCRIPTION==
This is an internal class that shouldn't be used outside  [[API:EPrints/Database|EPrints::Database]].

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==CORE METADATA FIELDS==
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<!-- Pod2Wiki=item_cachemapid -->
===cachemapid (int)===

The unique numerical ID of this cachemap object.

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===created (int)===

The time the cachemap record was created in seconds since start of  last epoch.

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===lastused (int)===

The time the cachemap record was last used in seconds since start of last epoch.

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===searchexap (longtext)===

A serialisation of the search carried out that is stored in this cachemap record.

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===oneshot (boolean)===

DEPRECATED. A boolean to record whether the cache is for single use where it will be created, used and immediately deleted.  Such as  type of caching is no longer required.

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==REFERENCES AND RELATED OBJECTS==
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===userid (itemref)===

Reference to the userid of the user who caused the cachemap record to be created, if this is known.

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==INSTANCE VARIABLES==
See [[API:EPrints/DataObj#INSTANCE_VARIABLES|EPrints::DataObj]].

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==METHODS==
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===Constructor Methods===
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====create_from_data====

 EPrints::DataObj::Cachemap-&gt;create_from_data( $session, $data, $dataset )
Creates a new cachemap data object in the database.

<tt>$dataset</tt> is the dataset it will belong to.

<tt>$data</tt> is the data structured as with [[API:EPrints/DataObj#new_from_data|EPrints::DataObj#new_from_data]].

This will create sub-objects as well.

Call this via:

 $dataset-&gt;create_object( $session, $data )
  
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===Class Methods===
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<!-- Pod2Wiki=item_get_system_field_info -->
====get_system_field_info====

 $fields = EPrints::DataObj::Access-&gt;get_system_field_info
Returns an array describing the system metadata of the cachemap dataset.

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====get_dataset_id====

 $dataset = EPrints::DataObj::Cachemap-&gt;get_dataset_id
Returns the ID of the [[API:EPrints/DataSet|EPrints::DataSet]] object to which this record  belongs.

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====get_defaults====

 $defaults = EPrints::DataObj::Cachemap-&gt;get_defaults( $session, $data )
Return default values for this object based on the starting <tt>$data</tt>.

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====cleanup====

 $dropped = EPrints::DataObj::Cachemap-&gt;cleanup( $repo )
Clean up old caches for specified <tt>$repo</tt>. 

Returns the number of caches dropped.

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===Object Methods===
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====remove====

 $rc = $cachemap-&gt;remove
Remove this record from the data set and the cache table from the  database.

Returns a code based of success of removing record / cache table.

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====get_sql_table_name====

 $sql_name = $cachemap-&gt;get_sql_table_name
Returns the name of the cache table for this cachemap record.

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====create_sql_table====

 $ok = $cachemap-&gt;create_sql_table( $dataset )
Create the cachemap database table that can store IDs for the  specified <tt>$dataset</tt>.

Returns code based on the success of creating cache table.

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==SEE ALSO==
[[API:EPrints/DataObj|EPrints::DataObj]] and [[API:EPrints/DataSet|EPrints::DataSet]].

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==COPYRIGHT==
{{API:Copyright}}
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