25 lines
968 B
PHP
25 lines
968 B
PHP
<?php
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/**
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* Interface that deferrable updates can implement to signal that updates can be combined.
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*
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* DeferredUpdates uses this to merge all pending updates of PHP class into a single update
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* by calling merge(). Note that upon merge(), the combined update goes to the back of the FIFO
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* queue so that such updates occur after related non-mergeable deferred updates. For example,
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* suppose updates that purge URLs can be merged, and the calling pattern is:
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* - a) DeferredUpdates::addUpdate( $purgeCdnUrlsA );
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* - b) DeferredUpdates::addUpdate( $deleteContentUrlsB );
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* - c) DeferredUpdates::addUpdate( $purgeCdnUrlsB )
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*
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* The purges for urls A and B will all happen after the $deleteContentUrlsB update.
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*
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* @since 1.27
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*/
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interface MergeableUpdate extends DeferrableUpdate {
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/**
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* Merge this update with $update
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*
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* @param MergeableUpdate $update Update of the same class type
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*/
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public function merge( MergeableUpdate $update );
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}
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