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<?php |
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namespace SA\CpeSdk; |
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use SA\CpeSdk; |
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/** |
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* Allow formatted logging on STDOUT |
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* Send logs to Syslog for log offloading |
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*/ |
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class CpeLogger |
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{ |
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public $logPath; |
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public $printout; |
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// Exception |
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const LOG_TYPE_ERROR = "LOG_TYPE_ERROR"; |
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const OPENLOG_ERROR = "OPENLOG_ERROR"; |
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// Specify the path where to create the log files |
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public function __construct( |
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$logPath = null, |
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$suffix = null, |
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$printout = false) |
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{ |
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global $argv; |
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date_default_timezone_set('UTC'); |
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$this->printout = $printout; |
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$this->logPath = "/var/tmp/logs/cpe/"; |
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if ($logPath) |
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$this->logPath = $logPath; |
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if (!file_exists($this->logPath)) |
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mkdir($this->logPath, 0755, true); |
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$file = basename($argv[0]); |
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if ($suffix) |
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$file .= "-".$suffix; |
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// Append progname to the path |
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$this->logPath .= "/".$file.".log"; |
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$this->log_out( |
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"INFO", |
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"[CPE SDK] ".basename(__FILE__), |
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"Logging to: ".$this->logPath); |
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} |
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// Log message to syslog and log file |
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public function log_out( |
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$type, |
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$source, |
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$message, |
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$workflowId = null) |
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{ |
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$log = [ |
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"time" => date("Y-m-d H:i:s", time()), |
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"source" => $source, |
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"type" => $type, |
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"message" => $message |
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]; |
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if ($workflowId) |
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$log["workflowId"] = $workflowId; |
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// Open Syslog. Use programe name as key |
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if (!openlog (__FILE__, LOG_CONS|LOG_PID, LOG_LOCAL1)) |
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throw new CpeException("Unable to connect to Syslog!", |
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OPENLOG_ERROR); |
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// Change Syslog priority level |
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switch ($type) |
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{ |
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case "INFO": |
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$priority = LOG_INFO; |
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break; |
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case "ERROR": |
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$priority = LOG_ERR; |
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break; |
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case "FATAL": |
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$priority = LOG_ALERT; |
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break; |
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case "WARNING": |
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$priority = LOG_WARNING; |
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break; |
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case "DEBUG": |
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$priority = LOG_DEBUG; |
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break; |
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default: |
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throw new CpeException("Unknown log Type!", |
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LOG_TYPE_ERROR); |
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} |
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// Print log in file |
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$this->print_to_file($log, $workflowId); |
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// Encode log message in JSON for better parsing |
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$out = json_encode($log); |
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// Send to syslog |
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syslog($priority, $out); |
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} |
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// Write log in file |
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private function print_to_file($log, $workflowId) |
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{ |
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if (!is_string($log['message'])) |
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$log['message'] = json_encode($log['message']); |
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$toPrint = $log['time'] . " [" . $log['type'] . "] [" . $log['source'] . "] "; |
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// If there is a workflow ID. We append it. |
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if ($workflowId) |
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$toPrint .= "[$workflowId] "; |
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$toPrint .= $log['message'] . "\n"; |
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if ($this->printout) |
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print $toPrint; |
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if (file_put_contents( |
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$this->logPath, |
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$toPrint, |
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FILE_APPEND) === false) |
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print "ERROR: Can't write into log file!\n"; |
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} |
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} |
Instead of relying on
global
state, we recommend one of these alternatives:1. Pass all data via parameters
2. Create a class that maintains your state