diff options
| author | xue <> | 2006-01-05 05:35:55 +0000 |
|---|---|---|
| committer | xue <> | 2006-01-05 05:35:55 +0000 |
| commit | 2d5b96ba9878ec36df7bb2af3493bb771c85b032 (patch) | |
| tree | 0ebe72f5f7c3dc56d6a2c1a89b9d6820e3ecb1ce /framework/Data/TCache.php | |
| parent | c4279b69ac0f2fa30fdd661083cb753965ae2850 (diff) | |
Diffstat (limited to 'framework/Data/TCache.php')
| -rw-r--r-- | framework/Data/TCache.php | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/framework/Data/TCache.php b/framework/Data/TCache.php new file mode 100644 index 00000000..64729b46 --- /dev/null +++ b/framework/Data/TCache.php @@ -0,0 +1,88 @@ +<?php
+
+/**
+ * ICache interface.
+ *
+ * This interface must be implemented by cache managers.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Revision: $ $Date: $
+ * @package System.Data
+ * @since 3.0
+ */
+interface ICache
+{
+ /**
+ * Retrieves a value from cache with a specified key.
+ * @return mixed the value stored in cache, false if the value is not in the cache or expired.
+ */
+ public function get($id);
+ /**
+ * Stores a value identified by a key into cache.
+ * If the cache already contains such a key, the existing value and
+ * expiration time will be replaced with the new ones.
+ *
+ * @param string the key identifying the value to be cached
+ * @param mixed the value to be cached
+ * @param integer the expiration time of the value,
+ * 0 means never expire,
+ * a number less or equal than 60*60*24*30 means the number of seconds that the value will remain valid.
+ * a number greater than 60 means a UNIX timestamp after which the value will expire.
+ * @return boolean true if the value is successfully stored into cache, false otherwise
+ */
+ public function set($id,$value,$expire=0);
+ /**
+ * Stores a value identified by a key into cache if the cache does not contain this key.
+ * Nothing will be done if the cache already contains the key.
+ * @param string the key identifying the value to be cached
+ * @param mixed the value to be cached
+ * @param integer the expiration time of the value,
+ * 0 means never expire,
+ * a number less or equal than 60*60*24*30 means the number of seconds that the value will remain valid.
+ * a number greater than 60 means a UNIX timestamp after which the value will expire.
+ * @return boolean true if the value is successfully stored into cache, false otherwise
+ */
+ public function add($id,$value,$expire=0);
+ /**
+ * Stores a value identified by a key into cache only if the cache contains this key.
+ * The existing value and expiration time will be overwritten with the new ones.
+ * @param string the key identifying the value to be cached
+ * @param mixed the value to be cached
+ * @param integer the expiration time of the value,
+ * 0 means never expire,
+ * a number less or equal than 60*60*24*30 means the number of seconds that the value will remain valid.
+ * a number greater than 60 means a UNIX timestamp after which the value will expire.
+ * @return boolean true if the value is successfully stored into cache, false otherwise
+ */
+ public function replace($id,$value,$expire=0);
+ /**
+ * Deletes a value with the specified key from cache
+ * @param string the key of the value to be deleted
+ * @return boolean if no error happens during deletion
+ */
+ public function delete($id);
+ /**
+ * Deletes all values from cache.
+ * Be careful of performing this operation if the cache is shared by multiple applications.
+ */
+ public function flush();
+}
+
+interface IDependency
+{
+
+}
+
+class TTimeDependency
+{
+}
+
+class TFileDependency
+{
+}
+
+class TDirectoryDependency
+{
+}
+
+?>
\ No newline at end of file |