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<?php
namespace Liuggio\StatsdClient;
use Liuggio\StatsdClient\Sender\SenderInterface;
use Liuggio\StatsdClient\Entity\StatsdDataInterface;
use Liuggio\StatsdClient\Exception\InvalidArgumentException;
class StatsdClient implements StatsdClientInterface
{
/**
* @var boolean
*/
private $failSilently;
/**
* @var \Liuggio\StatsdClient\Sender\SenderInterface
*/
private $sender;
/**
* @var boolean
*/
private $reducePacket;
/**
* Constructor.
*
* @param \Liuggio\StatsdClient\Sender\SenderInterface $sender
* @param Boolean $reducePacket
* @param Boolean $fail_silently
*/
public function __construct(SenderInterface $sender, $reducePacket = true, $fail_silently = true)
{
$this->sender = $sender;
$this->reducePacket = $reducePacket;
$this->failSilently = $fail_silently;
}
/**
* Throws an exc only if failSilently if getFailSilently is false.
*
* @param \Exception $exception
*
* @throws \Exception
*/
private function throwException(\Exception $exception)
{
if (!$this->getFailSilently()) {
throw $exception;
}
}
/**
* This function reduces the number of packets,the reduced has the maximum dimension of self::MAX_UDP_SIZE_STR
* Reference:
* https://github.com/etsy/statsd/blob/master/README.md
* All metrics can also be batch send in a single UDP packet, separated by a newline character.
*
* @param array $reducedMetrics
* @param array $metric
*
* @return array
*/
private static function doReduce($reducedMetrics, $metric)
{
$metricLength = strlen($metric);
$lastReducedMetric = count($reducedMetrics) > 0 ? end($reducedMetrics) : null;
if ($metricLength >= self::MAX_UDP_SIZE_STR
|| null === $lastReducedMetric
|| strlen($newMetric = $lastReducedMetric . "\n" . $metric) > self::MAX_UDP_SIZE_STR
) {
$reducedMetrics[] = $metric;
} else {
array_pop($reducedMetrics);
$reducedMetrics[] = $newMetric;
}
return $reducedMetrics;
}
/**
* this function reduce the amount of data that should be send
*
* @param mixed $arrayData
*
* @return mixed $arrayData
*/
public function reduceCount($arrayData)
{
if (is_array($arrayData)) {
$arrayData = array_reduce($arrayData, "self::doReduce", array());
}
return $arrayData;
}
/**
* Reference: https://github.com/etsy/statsd/blob/master/README.md
* Sampling 0.1
* Tells StatsD that this counter is being sent sampled every 1/10th of the time.
*
* @param mixed $data
* @param int $sampleRate
*
* @return mixed $data
*/
public function appendSampleRate($data, $sampleRate = 1)
{
if ($sampleRate < 1) {
array_walk($data, function(&$message, $key) use ($sampleRate) {
$message = sprintf('%s|@%s', $message, $sampleRate);
});
}
return $data;
}
/*
* Send the metrics over UDP
*
* {@inheritDoc}
*/
public function send($data, $sampleRate = 1)
{
// check format
if ($data instanceof StatsdDataInterface || is_string($data)) {
$data = array($data);
}
if (!is_array($data) || empty($data)) {
return;
}
// add sampling
if ($sampleRate < 1) {
$data = $this->appendSampleRate($data, $sampleRate);
}
// reduce number of packets
if ($this->getReducePacket()) {
$data = $this->reduceCount($data);
}
//failures in any of this should be silently ignored if ..
try {
$fp = $this->getSender()->open();
if (!$fp) {
return;
}
$written = 0;
foreach ($data as $key => $message) {
$written += $this->getSender()->write($fp, $message);
}
$this->getSender()->close($fp);
} catch (\Exception $e) {
$this->throwException($e);
}
return $written;
}
/**
* @param boolean $failSilently
*/
public function setFailSilently($failSilently)
{
$this->failSilently = $failSilently;
}
/**
* @return boolean
*/
public function getFailSilently()
{
return $this->failSilently;
}
/**
* @param \Liuggio\StatsdClient\Sender\SenderInterface $sender
*/
public function setSender(SenderInterface $sender)
{
$this->sender = $sender;
}
/**
* @return \Liuggio\StatsdClient\Sender\SenderInterface
*/
public function getSender()
{
return $this->sender;
}
/**
* @param boolean $reducePacket
*/
public function setReducePacket($reducePacket)
{
$this->reducePacket = $reducePacket;
}
/**
* @return boolean
*/
public function getReducePacket()
{
return $this->reducePacket;
}
}
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