Redis no sql lazy

core/Cache/ListGenerator.class.php

@@ -0,0 +1,21 @@
+<?php
+	/***************************************************************************
+	*   Copyright (C) 2012 by Artem Naumenko                                  *
+	*                                                                         *
+	*   This program is free software; you can redistribute it and/or modify  *
+	*   it under the terms of the GNU Lesser General Public License as        *
+	*   published by the Free Software Foundation; either version 3 of the    *
+	*   License, or (at your option) any later version.                       *
+	*                                                                         *
+	***************************************************************************/
+
+	/**
+	 * @param string $key 
+	 * 
+	 * @return Listable
+	 */
+
+	interface ListGenerator
+	{
+		public function fetchList($key);
+	}

core/DB/NoSQL/RedisNoSQL.class.php

@@ -9,16 +9,17 @@
 	*                                                                         *
 	***************************************************************************/
 
-	final class RedisNoSQL extends CachePeer
+	final class RedisNoSQL extends CachePeer implements ListGenerator
 	{
 		const DEFAULT_HOST = 'localhost';
 		const DEFAULT_PORT = '6379';
 		const DEFAULT_TIMEOUT = 1.0;
 
-		private $redis		= null;
-		private $host		= null;
-		private $port		= null;
-		private $timeout	= null;
+		private $redis			= null;
+		private $host			= null;
+		private $port			= null;
+		private $timeout		= null;
+		private $triedConnect	= false;
 
 		/**
 		 * @param type $host
@@ -44,15 +45,6 @@ public function __construct(
 			$this->host		= $host;
 			$this->port		= $port;
 			$this->timeout	= $timeout;
-
-			$this->redis = new Redis();
-
-			try {
-				$this->redis->pconnect($this->host, $this->port, $this->timeout);
-				$this->isAlive();
-			} catch (RedisException $e) {
-				$this->alive = false;
-			}
 		}
 
 		public function __destruct()
@@ -68,6 +60,8 @@ public function __destruct()
 
 		public function clean()
 		{
+			$this->ensureTriedToConnect();
+
 			try {
 				$this->redis->flushDB();
 			} catch (RedisException $e) {
@@ -79,6 +73,8 @@ public function clean()
 
 		public function isAlive()
 		{
+			$this->ensureTriedToConnect();
+
 			try {
 				$this->alive = $this->redis->ping() == '+PONG';
 			} catch (RedisException $e) {
@@ -90,6 +86,8 @@ public function isAlive()
 
 		public function append($key, $data)
 		{
+			$this->ensureTriedToConnect();
+
 			try {
 				return $this->redis->append($key, $data);
 			} catch (RedisException $e) {
@@ -99,6 +97,8 @@ public function append($key, $data)
 
 		public function decrement($key, $value)
 		{
+			$this->ensureTriedToConnect();
+
 			try {
 				return $this->redis->decrBy($key, $value);
 			} catch (RedisException $e) {
@@ -108,6 +108,8 @@ public function decrement($key, $value)
 
 		public function delete($key)
 		{
+			$this->ensureTriedToConnect();
+
 			try {
 				return $this->redis->delete($key);
 			} catch (RedisException $e) {
@@ -117,6 +119,8 @@ public function delete($key)
 
 		public function get($key)
 		{
+			$this->ensureTriedToConnect();
+
 			try {
 				return $this->redis->get($key);
 			} catch (RedisException $e) {
@@ -128,6 +132,8 @@ public function get($key)
 
 		public function increment($key, $value)
 		{
+			$this->ensureTriedToConnect();
+
 			try {
 				return $this->redis->incrBy($key, $value);
 			} catch (RedisException $e) {
@@ -140,15 +146,17 @@ public function increment($key, $value)
 		 * 
 		 * @return RedisNoSQLList
 		 */
-		public function fetchList($key)
+		public function fetchList($key, $timeout = null)
 		{
-			return new RedisNoSQLList($this->redis, $key);
+			$this->ensureTriedToConnect();
+
+			return new RedisNoSQLList($this->redis, $key, $timeout);
 		}
 
 		/**
 		 * @param string $key 
 		 * 
-		 * @return ISet
+		 * @return RedisNoSQLSet
 		 */
 		public function fetchSet($key)
 		{
@@ -158,7 +166,7 @@ public function fetchSet($key)
 		/**
 		 * @param string $key 
 		 * 
-		 * @return IHash
+		 * @return RedisNoSQLHash
 		 */
 		public function fetchHash($key)
 		{
@@ -167,6 +175,8 @@ public function fetchHash($key)
 
 		protected function store($action, $key, $value, $expires = Cache::EXPIRES_MEDIUM)
 		{
+			$this->ensureTriedToConnect();
+
 			switch ($action) {
 				case 'set':
 				case 'replace':
@@ -181,5 +191,24 @@ protected function store($action, $key, $value, $expires = Cache::EXPIRES_MEDIUM
 					throw new UnimplementedFeatureException();
 			}
 		}
+
+		protected function ensureTriedToConnect()
+		{
+			if ($this->triedConnect) 
+				return $this;
+
+			$this->triedConnect = true;
+
+			$this->redis = new Redis();
+
+			try {
+				$this->redis->pconnect($this->host, $this->port, $this->timeout);
+				$this->isAlive();
+			} catch (RedisException $e) {
+				$this->alive = false;
+			}
+
+			return $this;
+		}
 	}
 

core/DB/NoSQL/RedisNoSQLList.class.php

@@ -14,11 +14,13 @@ final class RedisNoSQLList implements Listable
 		private $redis		= null;
 		private $key		= null;
 		private $position	= null;
+		private $timeout	= null;
 
-		public function __construct(Redis $redis, $key)
+		public function __construct(Redis $redis, $key, $timeout = null)
 		{
 			$this->redis	= $redis;
 			$this->key		= $key;
+			$this->timeout	= $timeout;
 		}
 
 		/**
@@ -29,6 +31,9 @@ public function append($value)
 		{
 			$this->redis->rpush($this->key, $value);
 
+			if ($this->timeout)
+				$this->redis->setTimeout($this->key, $this->timeout);
+
 			return $this;
 		}
 
@@ -40,6 +45,9 @@ public function prepend($value)
 		{
 			$this->redis->lpush($this->key, $value);
 
+			if ($this->timeout)
+				$this->redis->setTimeout($this->key, $this->timeout);
+
 			return $this;
 		}
 
@@ -82,6 +90,9 @@ public function set($index, $value)
 		{
 			$this->redis->lset($this->key, $index, $value);
 
+			if ($this->timeout)
+				$this->redis->expire($this->key, $this->timeout);
+
 			return $this;
 		}