String#hashCode: private int hash; … public int hashCode() { int h = hash; if (h == 0 && count > 0) { int off = offset; char val[] = value; int len = count; for (int i = 0; i < len; i++) { h = 31*h + val[off++]; } hash = h; } return … Read more
If you are using .NET 4 or superior, you can use MemoryCache class.
The filesystem backend is only worth looking at if you’re not going to use a database for any other part of your system. If you are using a database then the filesystem backend has nothing to recommend it. The memcache backend is much quicker than the database backend, but you run the risk of a … Read more
Another workaround is to add ?v=1 to your Javascript and CSS links. For example: <link rel=”stylesheet” type=”text/css” media=”all” href=”https://stackoverflow.com/questions/8792255/./css/ipad.css?v=1″> <script src=”./js/ipad.js?v=1″></script> It seems one doesn’t have to update the number when your file has changed, as far as I can tell. Apparently, on an iPad 2 with the latest software update installed, it is enough … Read more
Please note that if the web service supports caching output, you don’t have to use CacheRequest below, because Volley will automatically cache. For your issue, I use some codes inside parseCacheHeaders (and refering to @oleksandr_yefremov‘s codes). The following code I have tested. Of course, can use for JsonArrayRequest also. Hope this help! JsonObjectRequest jsonObjectRequest = … Read more
The NoStore property is used to inform proxy servers and browser that they should not store a permanent copy of the cached content by setting Cache-Control: no-store within the request header. Duration simply specifies how long the content of the controller action should be cached, e.g. 10seconds. This will set the Cache-Control: max-age to >= … Read more
The main difference is because Caffeine uses ring buffers to record & replay events, whereas Guava uses ConcurrentLinkedQueue. The intent was always to migrate Guava over and it made sense to start simpler, but unfortunately there was never interest in accepting those changes. The ring buffer approach avoids allocation, is bounded (lossy), and cheaper to … Read more
You can use LinkedHashMap like this You can remove by LRU or FIFO. public static <K, V> Map<K, V> createLRUMap(final int maxEntries) { return new LinkedHashMap<K, V>(maxEntries*10/7, 0.7f, true) { @Override protected boolean removeEldestEntry(Map.Entry<K, V> eldest) { return size() > maxEntries; } }; }
Map should be O(1) in most implementations average case. Since Map keeps insertion order, adding a bit of code around it will get you a LRU and for most uses this should be plenty fast. I needed a simple LRU cache for a small number of expensive operations (1 second). I felt better about copy-pasting … Read more