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<?php
/**
* Statistics logger that writes to a set of log files
*
* @package simpleSAMLphp
* @version $Id$
*/
class sspmod_core_Stats_Output_File extends SimpleSAML_Stats_Output {
/**
* The log directory.
* @var string
*/
private $logDir;
/**
* The file handle for the current file.
* @var resource
*/
private $file = NULL;
/**
* The current file date.
* @var string
*/
private $fileDate = NULL;
/**
* Initialize the output.
*
* @param SimpleSAML_Configuration $config The configuration for this output.
*/
public function __construct(SimpleSAML_Configuration $config) {
$this->logDir = $config->getPathValue('directory');
if ($this->logDir === NULL) {
throw new Exception('Missing "directory" option for core:File');
}
if (!is_dir($this->logDir)) {
throw new Exception('Could not find log directory: ' . var_export($this->logDir, TRUE));
}
}
/**
* Open a log file.
*
* @param string $date The date for the log file.
*/
private function openLog($date) {
assert('is_string($date)');
if ($this->file !== NULL && $this->file !== FALSE) {
fclose($this->file);
$this->file = NULL;
}
$fileName = $this->logDir . '/' . $date . '.log';
$this->file = @fopen($fileName, 'a');
if ($this->file === FALSE) {
throw new SimpleSAML_Error_Exception('Error opening log file: ' . var_export($fileName, TRUE));
}
/* Disable output buffering. */
stream_set_write_buffer($this->file, 0);
$this->fileDate = $date;
}
/**
* Write a stats event.
*
* @param array $data The event.
*/
public function emit(array $data) {
assert('isset($data["time"])');
$time = $data['time'];
$milliseconds = (int)(($time - (int)$time) * 1000);
$timestamp = gmdate('Y-m-d\TH:i:s', $time) . sprintf('.%03dZ', $milliseconds);
$outDate = substr($timestamp, 0, 10); /* The date-part of the timstamp. */
if ($outDate !== $this->fileDate) {
$this->openLog($outDate);
}
$line = $timestamp . ' ' . json_encode($data) . "\n";
fwrite($this->file, $line);
}
}
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