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courses:mapreduce-tutorial:perl-api [2012/01/23 21:16]
straka 		courses:mapreduce-tutorial:perl-api [2012/01/23 21:18]
straka
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     * ''$content%%->%%write($key, $value)'' -- output the (''$key'', ''$value'') pair     * ''$content%%->%%write($key, $value)'' -- output the (''$key'', ''$value'') pair
     * ''$content%%->%%counter($group, $name, $increment)'' -- increases the counter ''$name'' in the group ''$group'' by ''$increment''     * ''$content%%->%%counter($group, $name, $increment)'' -- increases the counter ''$name'' in the group ''$group'' by ''$increment''
 +  * ''sub setup($self, $context)'' -- executed once before any input (key, value) pairs are processed. The ''$context'' can be used to both produce (key, value) pairs and increment counters. 
 +  * ''sub cleanup($self, $context)'' -- executed once after all input (key, value) pairs are processed. The ''$context'' can be used to both produce (key, value) pairs and increment counters.

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