ZendMonitor.php

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<?php
#require_once 'Zend/Log/Writer/Abstract.php';

class Zend_Log_Writer_ZendMonitor extends Zend_Log_Writer_Abstract
{
    protected $_isEnabled = true;

    protected $_isZendServer = false;

    public function __construct()
    {
        if (!function_exists('monitor_custom_event')) {
            $this->_isEnabled = false;
        }
        if (function_exists('zend_monitor_custom_event')) {
            $this->_isZendServer = true;
        }
    }

    static public function factory($config)
    {
        return new self();
    }

    public function isEnabled()
    {
        return $this->_isEnabled;
    }

    public function write($event)
    {
        if (!$this->isEnabled()) {
            return;
        }

        parent::write($event);
    }

    protected function _write($event)
    {
        $priority = $event['priority'];
        $message  = $event['message'];
        unset($event['priority'], $event['message']);

        if (!empty($event)) {
            if ($this->_isZendServer) {
                // On Zend Server; third argument should be the event
                zend_monitor_custom_event($priority, $message, $event);
            } else {
                // On Zend Platform; third argument is severity -- either
                // 0 or 1 -- and fourth is optional (event)
                // Severity is either 0 (normal) or 1 (severe); classifying
                // notice, info, and debug as "normal", and all others as
                // "severe"
                monitor_custom_event($priority, $message, ($priority > 4) ? 0 : 1, $event);
            }
        } else {
            monitor_custom_event($priority, $message);
        }
    }
}