单例模式,多个对象共享一块内存区域(实例)

lyshfire · Oct 29, 2016 · d876780 · d876780
1 parent 7c7e7f4
commit d876780
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Showing 2 changed files with 93 additions and 23 deletions.
diff --git a/Backend/Home/Controller/DataBaseController.class.php b/Backend/Home/Controller/DataBaseController.class.php
@@ -7,11 +7,88 @@
 
 class DataBaseController extends Controller
 {
-    public function index(){
+    public function index()
+    {
+        $redis = RedisInstance::MasterInstance();
+        $redis->select(1);
+        $redisInfo = $redis->lRange('message01',0,10);
+        var_dump($redisInfo);
+    }
+
+    /**
+     * MasterInstance Redis主实例，适合于存储数据
+     */
+    public function MasterInstance()
+    {
+        $redis = RedisInstance::MasterInstance();
+        $redis->select(1);
+        $redisInfo = $redis->lRange('message01',0,10);
+        var_dump($redisInfo);
+    }
+
+    /**
+     * SlaveOneInstance Redis从实例，适合于读取数据
+     */
+    public function SlaveOneInstance()
+    {
+        $redis = RedisInstance::SlaveOneInstance();
+        $redis->select(1);
+        $redisInfo = $redis->lRange('message01',0,15);
+        var_dump($redisInfo);
+    }
+
+    /**
+     * SlaveTwoInstance Redis从实例，适合于读取数据
+     */
+    public function SlaveTwoInstance()
+    {
+        $redis = RedisInstance::SlaveTwoInstance();
+        $redis->select(1);
+        $redisInfo = $redis->lRange('message01',0,6);
+        var_dump($redisInfo);
+    }
 
+    /**
+     * 连接本地的Redis实例
+     */
+    public function localhostRedis(){
+        $redis = RedisInstance::Instance();
+        var_dump($redis);
+
+        $redis->connect('127.0.0.1');
+        $keys = $redis->keys('*');
+        var_dump($keys);
     }
 
-    public function show($name){
+    /**
+     * 是否是同一个对象的比较
+     * 比较结果：
+     * 【redis1和redis2：是同一个实例--redis1和redis3：是同一个实例--redis2和redis3：是同一个实例--】
+     * 对象$redis1,$redis2,$redis3实际上都是使用同一个对象实例，访问的都是同一块内存区域
+     */
+    public function ObjectCompare()
+    {
+
+        $redis1 = RedisInstance::MasterInstance();
+        $redis2 = RedisInstance::SlaveOneInstance();
+        $redis3 = RedisInstance::SlaveTwoInstance();
+        if($redis1 === $redis2){
+            echo 'redis1和redis2：是同一个实例--';
+        }else{
+            echo '不是同一个实例';
+        }
+
+        if($redis1 === $redis3){
+            echo 'redis1和redis3：是同一个实例--';
+        }else{
+            echo '不是同一个实例';
+        }
+
+        if($redis3 === $redis2){
+            echo 'redis2和redis3：是同一个实例--';
+        }else{
+            echo '不是同一个实例';
+        }
 
     }
 

diff --git a/ThinkPHP/Library/Org/Util/RedisInstance.class.php b/ThinkPHP/Library/Org/Util/RedisInstance.class.php
@@ -36,10 +36,12 @@ private function __construct()
 
     /**
      *  单例方法,用于访问实例的公共的静态方法
+     *  这个只是一个实例
+     *  这个实例方法适合于连接到别的Redis数据库中去。列如：在项目中选择不同的Redis数据库
      * @return \Redis
      * @static
      */
-    public static function getInstance()
+    public static function Instance()
     {
         if (!(static::$_instance instanceof \Redis)) {
             static::$_instance = new \Redis();
@@ -48,46 +50,37 @@ public static function getInstance()
     }
 
     /**
-     *  单例方法,用于访问实例的公共的静态方法
+     *  单例方法,用于访问Master实例的公共的静态方法
      * @return \Redis
      * @static
      */
-    public static function getMaster()
+    public static function MasterInstance()
     {
-        if (!(static::$_instance instanceof \Redis)) {
-            static::$_instance = new \Redis();
-            self::getInstance()->connect('121.41.88.209', '63789');
-            self::getInstance()->auth('tinywanredis');
-        }
+        self::Instance()->connect('121.41.88.209', '63789');
+        self::Instance()->auth('tinywanredis');
         return static::$_instance;
     }
 
 
     /**
-     * Slave1
+     * Slave1 实例
      * @return null
      * @static
      */
-    public static function getSlave1()
+    public static function SlaveOneInstance()
     {
-        if (!(static::$_instance instanceof \Redis)) {
-            static::$_instance = new \Redis();
-            self::getInstance()->connect('121.41.88.209', '63788');
-        }
+        self::Instance()->connect('121.41.88.209', '63788');
         return static::$_instance;
     }
 
     /**
-     * Slave2
+     * Slave2 实例
      * @return null
      * @static
      */
-    public static function getSlave2()
+    public static function SlaveTwoInstance()
     {
-        if (!(static::$_instance instanceof \Redis)) {
-            static::$_instance = new \Redis();
-            self::getInstance()->connect('121.41.88.209', '63700');
-        }
+        self::Instance()->connect('121.41.88.209', '63700');
         return static::$_instance;
     }
 
@@ -101,7 +94,7 @@ public static function connect()
         if (!self::$_connectSource)
         {
             //@return bool TRUE on success, FALSE on error.
-            self::$_connectSource = self::getInstance()->connect('121.41.88.209', '63789');
+            self::$_connectSource = self::Instance()->connect('121.41.88.209', '63789');
             // 没有资源返回
             if (!self::$_connectSource)
             {