* Dependencies
*/
require_once 'LineCount.php';
/**
* The WordCount class wrote its output to a file on the distributed file
* system. To find out what the absolute path name of this file is on this
* machine, we make use of the Yothalot\Path class to turn the relative name
* into an absolute path (GlusterFS must be mounted on this machine)
*
* @var Yothalot\Path
*/
$path = new Yothalot\Path("linecount-results.txt");
/**
* Unlink the result upon start, to make sure that we don't display the previous result.
*/
unlink($path->absolute());
/**
* Create an instance of the WordCount algorithm
* @var WordCount
*/
$wordcount = new LineCount($path->relative());
/**
* We want to send this WordCount instance to the Yothalot master. To do this,
* we need an instance of this master object.
*
* (Under the hood, you do not connect with the Yothalot master process, but to
* a RabbitMQ message queue, the login details are therefore the RabbitMQ
* details)
*
* @var Yothalot\Master
*/
/**
* The final step in the reducer process calls the write() method once for
* every found key, and for each reduced value.
*
* In this specific WordCount example, the key is a word, and the
* value the total number of occurances
*
* @param mixed The key for which the result comes in
* @param mixed Fully reduced value
*/
function write($key, $value)
{
// the output file is stored on the gluster
$path = new Yothalot\Path($this->output);
// open an output file
$output = new Yothalot\Output($path->absolute());
// add the key and value
$output->kv($key, $value);
}
/**
* The final step in the reducer process calls the write() method once for
* every found key, and for each reduced value.
*
* In this specific WordCount example, the key is a word, and the
* value the total number of occurances
*
* @param mixed The key for which the result comes in
* @param mixed Fully reduced value
*/
function write($key, $value)
{
// the output file is stored on the gluster
$path = new Yothalot\Path($this->output);
// write the key value pair to a file
file_put_contents($path->absolute(), "{$key}: {$value}\n", FILE_APPEND);
}
/**
* The final step in the reducer process calls the write() method once for
* every found key, and for each reduced value.
*
* In this specific WordCount example, the key is a word, and the
* value the total number of occurrences
*
* @param mixed The key for which the result comes in
* @param mixed Fully reduced value
*/
public function write($key, $value)
{
// if we've not added the file yet
if (!$this->file) {
// the output file is stored on the gluster
$path = new Yothalot\Path($this->output);
// open the file
$this->file = fopen($path->absolute(), "w+");
}
// write to the file
fwrite($this->file, "{$key}: {$value}\n");
}
