Move GardeningServer out of BuildSlaveSupport

Tools/BuildSlaveSupport/build.webkit.org-config/public_html/TestFailures/scripts/PersistentCache.js

-/*
- * Copyright (C) 2011 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-var PersistentCache = {
-    contains: function(key) {
-        return key in localStorage;
-    },
-
-    get: function(key) {
-        var string = localStorage[key];
-        if (!string)
-            return string;
-
-        // FIXME: We could update the date stored with the value here to make this more of an MRU
-        // cache (instead of most-recently-stored), but that would result in extra disk access that
-        // might not be so great.
-        return JSON.parse(this._parseDateAndJSONFromString(string).json);
-    },
-
-    set: function(key, value) {
-        try {
-            localStorage[key] = this._addDateToJSONString(JSON.stringify(value));
-        } catch (e) {
-            if (e.code !== 22) // QUOTA_EXCEEDED_ERR
-                throw e;
-
-            // We've run out of space in localStorage. Let's just throw away everything and try
-            // again.
-            this._emptyCache();
-            this.set(key, value);
-        }
-    },
-
-    prune: function() {
-        var now = Date.now();
-        for (var key in localStorage) {
-            var date = this._parseDateAndJSONFromString(localStorage[key]).date;
-            if (now - date <= this._dataAgeLimitMS)
-                continue;
-            delete localStorage[key];
-        }
-
-        this.set(this._lastPruneDateKey, now);
-    },
-
-    _addDateToJSONString: function(jsonString) {
-        return Date.now() + this._dateAndJSONSeparator + jsonString;
-    },
-
-    _dataAgeLimitMS: 1000 * 60 * 60 * 24 * 1.1, // Just over one day
-
-    _dateAndJSONSeparator: ': ',
-
-    _emptyCache: function() {
-        for (var key in localStorage)
-            delete localStorage[key];
-    },
-
-    _parseDateAndJSONFromString: function(string) {
-        var separatorIndex = string.indexOf(this._dateAndJSONSeparator);
-        return {
-            date: new Date(parseInt(string.substring(0, separatorIndex), 10)),
-            json: string.substring(separatorIndex + this._dateAndJSONSeparator.length),
-        };
-    },
-};