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<?php
/**
* Copyright 2015
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
use Liuggio\StatsdClient\Entity\StatsdData;
use Liuggio\StatsdClient\Entity\StatsdDataInterface;
use Liuggio\StatsdClient\Factory\StatsdDataFactory;
/**
* A factory for application metric data.
*
* This class prepends a context-specific prefix to each metric key and keeps
* a reference to each constructed metric in an internal array buffer.
*
* @since 1.25
*/
class BufferingStatsdDataFactory extends StatsdDataFactory {
protected $buffer = array();
public function __construct( $prefix ) {
parent::__construct();
$this->prefix = $prefix;
}
/**
* Normalize a metric key for StatsD
*
* Replace occurences of '::' with dots and any other non-alphanumeric
* characters with underscores. Combine runs of dots or underscores.
* Then trim leading or trailing dots or underscores.
*
* @param string $key
* @since 1.26
*/
private static function normalizeMetricKey( $key ) {
$key = preg_replace( '/[:.]+/', '.', $key );
$key = preg_replace( '/[^a-z0-9.]+/i', '_', $key );
$key = trim( $key, '_.' );
return str_replace( array( '._', '_.' ), '.', $key );
}
public function produceStatsdData( $key, $value = 1, $metric = StatsdDataInterface::STATSD_METRIC_COUNT ) {
$entity = $this->produceStatsdDataEntity();
if ( $key !== null ) {
$key = self::normalizeMetricKey( "{$this->prefix}.{$key}" );
$entity->setKey( $key );
}
if ( $value !== null ) {
$entity->setValue( $value );
}
if ( $metric !== null ) {
$entity->setMetric( $metric );
}
// Don't bother buffering a counter update with a delta of zero.
if ( !( $metric === StatsdDataInterface::STATSD_METRIC_COUNT && !$value ) ) {
$this->buffer[] = $entity;
}
return $entity;
}
/**
* @return StatsdData[]
*/
public function getBuffer() {
return $this->buffer;
}
}
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