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-rw-r--r--infrastructure/framework-src/modules/cache_utils.js36
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diff --git a/infrastructure/framework-src/modules/cache_utils.js b/infrastructure/framework-src/modules/cache_utils.js
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+/**
+ * Copyright 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import("sync");
+
+/* performs function on an object from the cache, all within a lock */
+function syncedWithCache(name, fn) {
+ return sync.doWithStringLock("cache/"+name, function() {
+ var parts = name.split(".");
+ var obj = appjet.cache;
+ for (var i = 0; i < parts.length; i++) {
+ var p = parts[i];
+ if (!obj[p]) {
+ obj[p] = {};
+ }
+ obj = obj[p];
+ }
+ return fn(obj);
+ });
+}
+
+
+