测试版

node_modules/store/plugins/expire.js

@@ -0,0 +1,59 @@
+var namespace = 'expire_mixin'
+
+module.exports = expirePlugin
+
+function expirePlugin() {
+	var expirations = this.createStore(this.storage, null, this._namespacePrefix+namespace)
+	
+	return {
+		set: expire_set,
+		get: expire_get,
+		remove: expire_remove,
+		getExpiration: getExpiration,
+		removeExpiredKeys: removeExpiredKeys
+	}
+	
+	function expire_set(super_fn, key, val, expiration) {
+		if (!this.hasNamespace(namespace)) {
+			expirations.set(key, expiration)
+		}
+		return super_fn()
+	}
+	
+	function expire_get(super_fn, key) {
+		if (!this.hasNamespace(namespace)) {
+			_checkExpiration.call(this, key)
+		}
+		return super_fn()
+	}
+	
+	function expire_remove(super_fn, key) {
+		if (!this.hasNamespace(namespace)) {
+			expirations.remove(key)
+		}
+		return super_fn()
+	}
+	
+	function getExpiration(_, key) {
+		return expirations.get(key)
+	}
+	
+	function removeExpiredKeys(_) {
+		var keys = []
+		this.each(function(val, key) {
+			keys.push(key)
+		})
+		for (var i=0; i<keys.length; i++) {
+			_checkExpiration.call(this, keys[i])
+		}
+	}
+	
+	function _checkExpiration(key) {
+		var expiration = expirations.get(key, Number.MAX_VALUE)
+		if (expiration <= new Date().getTime()) {
+			this.raw.remove(key)
+			expirations.remove(key)
+		}
+	}
+	
+}