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<?php
namespace gipfl\InfluxDb;
use gipfl\Curl\RequestError;
use Psr\Http\Message\ResponseInterface;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerAwareTrait;
use Psr\Log\NullLogger;
use React\EventLoop\LoopInterface;
use React\EventLoop\TimerInterface;
/**
* Gives no result, enqueue and forget
*/
class ChunkedInfluxDbWriter implements LoggerAwareInterface
{
use LoggerAwareTrait;
const DEFAULT_BUFFER_SIZE = 5000;
const DEFAULT_FLUSH_INTERVAL = 0.2;
const DEFAULT_PRECISION = 's';
/** @var int */
protected $bufferSize = self::DEFAULT_BUFFER_SIZE;
/** @var float */
protected $flushInterval = self::DEFAULT_FLUSH_INTERVAL;
/** @var string */
protected $precision = self::DEFAULT_PRECISION;
/** @var DataPoint[] */
protected $buffer = [];
/** @var InfluxDbConnection */
protected $connection;
/** @var string */
protected $dbName;
/** @var LoopInterface */
protected $loop;
/** @var ?TimerInterface */
protected $flushTimer;
public function __construct(InfluxDbConnection $connection, $dbName, LoopInterface $loop)
{
$this->setLogger(new NullLogger());
$this->connection = $connection;
$this->dbName = $dbName;
$this->loop = $loop;
}
/**
* @param DataPoint $point
*/
public function enqueue(DataPoint $point)
{
$this->buffer[] = $point;
$count = count($this->buffer);
if ($count >= $this->bufferSize) {
$this->flush();
} else {
$this->startFlushTimer();
}
}
/**
* @param int $bufferSize
* @return ChunkedInfluxDbWriter
*/
public function setBufferSize($bufferSize)
{
$this->bufferSize = $bufferSize;
return $this;
}
/**
* @param float $flushInterval
* @return ChunkedInfluxDbWriter
*/
public function setFlushInterval($flushInterval)
{
$this->flushInterval = $flushInterval;
return $this;
}
/**
* @param string $precision ns,u,ms,s,m,h
* @return ChunkedInfluxDbWriter
*/
public function setPrecision($precision)
{
$this->precision = $precision;
return $this;
}
public function flush()
{
$buffer = $this->buffer;
$this->buffer = [];
$this->stopFlushTimer();
$this->logger->debug(sprintf('Flushing InfluxDB buffer, sending %d data points', count($buffer)));
$start = microtime(true);
$this->connection->writeDataPoints($this->dbName, $buffer, $this->precision)
->then(function (ResponseInterface $response) use ($start) {
$code = $response->getStatusCode();
$duration = (microtime(true) - $start) * 1000;
if ($code > 199 && $code < 300) {
$this->logger->debug(sprintf('Got response from InfluxDB after %.2Fms', $duration));
} else {
$this->logger->error(sprintf(
'Got unexpected %d from InfluxDB after %.2Fms: %s',
$code,
$duration,
$response->getReasonPhrase()
));
}
}, function (RequestError $e) {
$this->logger->error($e->getMessage());
})->done();
}
public function stop()
{
$this->flush();
}
protected function startFlushTimer()
{
if ($this->flushTimer === null) {
$this->flushTimer = $this->loop->addPeriodicTimer($this->flushInterval, function () {
if (! empty($this->buffer)) {
$this->flush();
}
});
}
}
protected function stopFlushTimer()
{
if ($this->flushTimer) {
$this->loop->cancelTimer($this->flushTimer);
$this->flushTimer = null;
}
}
public function __destruct()
{
$this->stopFlushTimer();
$this->loop = null;
$this->connection = null;
}
}
|
