New global Object Cache

2024-10-07 16:52:45 +00:00 · 2015-04-12 11:22:43 +00:00
parent ee83c02d8b
commit f55d57372b
5 changed files with 269 additions and 42 deletions
--- a/includes/object-cache.inc.php
+++ b/includes/object-cache.inc.php
@@ -0,0 +1,113 @@
+<?php
+
+/* Copyright (C) 2015 Daniel Preussker <f0o@devilcode.org>
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+/**
+ * Object-Cache
+ * @author f0o <f0o@devilcode.org>
+ * @copyright 2015 f0o, LibreNMS
+ * @license GPL
+ * @package LibreNMS
+ * @subpackage Cache
+ */
+
+class ObjCache implements ArrayAccess {
+	private $data = array();
+	private $obj  = "";
+
+	/**
+	 * Initialize ObjCache
+	 * @param string $obj Name of Object
+	 * @return void
+	 */
+	public function __construct( $obj ) {
+		global $config;
+		$this->obj = $obj;
+		if( isset($GLOBALS['_ObjCache'][$obj]) ) {
+			$this->data = $GLOBALS['_ObjCacheSkell'][$obj];
+		} else {
+			if( !is_array($GLOBALS['_ObjCacheSkell']) ) {
+				$GLOBALS['_ObjCacheSkell'] = array();
+			}
+			if( !is_array($GLOBALS['_ObjCache']) ) {
+				$GLOBALS['_ObjCache'] = array();
+			}
+			if( file_exists($config['install_dir'].'/includes/caches/'.$obj.'.inc.php') ) {
+				$data = array();
+				include($config['install_dir'].'/includes/caches/'.$obj.'.inc.php');
+				$this->data = $data;
+				$GLOBALS['_ObjCacheSkell'][$obj] = $this->data;
+				if( !is_array($GLOBALS['_ObjCache'][$obj]) ) {
+					$GLOBALS['_ObjCache'][$obj] = $this->data;
+				}
+			}
+		}
+	}
+
+	/**
+	 * Check if data exists
+	 * @param string $obj Name of Data-Object
+	 * @return boolean
+	 */
+	public function offsetExists( $obj ) {
+		if( isset($this->data[$obj]) ) {
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Get Data-Object
+	 * @param string $obj Name of Data-Object
+	 * @return mixed
+	 */
+	public function offsetGet( $obj ) {
+		if( isset($this->data[$obj]) ) {
+			if( isset($this->data[$obj]['value']) ) {
+				return $this->data[$obj]['value'];
+			} elseif( isset($GLOBALS['_ObjCache'][$this->obj][$obj]['value']) ) {
+				return $GLOBALS['_ObjCache'][$this->obj][$obj]['value'];
+			} else {
+				$GLOBALS['_ObjCache'][$this->obj][$obj]['value'] = dbFetchCell($this->data[$obj]['query'],$this->data[$obj]['params']);
+				return $GLOBALS['_ObjCache'][$this->obj][$obj]['value'];
+			}
+		}
+	}
+
+	/**
+	 * Overrides internal Cache-Object
+	 * @param string $obj Name of Data-Object
+	 * @param mixed $value Value
+	 * @return boolean
+	 */
+	public function offsetSet( $obj, $value ) {
+		if( !is_array($this->data[$obj]) ) {
+			$this->data[$obj] = array();
+		}
+		$this->data[$obj]['value'] = $value;
+		return $this->data[$obj]['value'];
+	}
+
+	/**
+	 * Reset Data-Object
+	 * @param string $obj Name of Data-Object
+	 * @return mixed
+	 */
+	public function offsetUnset( $obj ) {
+		unset($this->data[$obj]['value']);
+		return true;
+	}
+
+}