A cache is a component that transparently stores data so that future requests for that data can be served faster.

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35 views

LRU caching decorator that caches in the instance and in a shared cache

I needed a caching decorator, that could be used with methods and functions, that could take typed args and kwargs, and that was Python 2.7 compatible. Therefore I started with a backport of the ...
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0answers
26 views

Purging elements from the map if it reaches a memory size limit

I have implemented a LRU cache using ConcurrentLinkedHashMap. In the same map, I am purging events if my map reaches a particular limit as shown below. I have a ...
3
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0answers
171 views

Caching image in memory or on disk

I am caching an image locally..That same image will be used in few screens. Steps for doing this is as follows: Get image from cache If not present in NSCache, get image from Cache directory If not ...
4
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1answer
49 views

Caching mechanism for saving a bitmap

I needed a quick caching mechanism to save a bitmap (picture). There was no way I could get the bitmap to the class where I need to upload it to the server so for the sake of organization and code ...
4
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0answers
147 views

Implement two level caching using spring's cache abstraction Cache and CacheManager

Details about spring's caching framework are here. When I was reading this link, I thought the composite cache mentioned there was one that used levels of caching based on the order given to the ...
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0answers
58 views

Caching side effects

Is this a proper way to cache side effects (occurring on job.tryLoad)? ...
2
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1answer
43 views

Using Cache::remember for banners and stores

I'm using Cache::remember to cache 3 results in my action, 2 in the same call to Cache::remember. It works, but I have 2 ...
3
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0answers
43 views

Angular OOP services and caching

I've created a caching service using OOP techniques combined with the revealing module pattern and the angular-cache library. New CacheDataClass objects are ...
3
votes
1answer
65 views

Generic ObjectCache with Expiration

I sometimes need an object that caches some data but only for the specified amount of time. So I created a class that should handle this. The main goal was to make it generic unlike the ...
2
votes
1answer
25 views

Dump of ColdFusion cache

I am trying to give show a UI friendly dump of the cache status ...
3
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71 views

Cache with timeout per key

I wrote a general purpose library for in-memory cache with custom timeout for each key. ...
2
votes
1answer
51 views

Java basic AsyncCache implementation

I wanted to use an async-cache to store URLs of images that I have to display in a list. The image URL is fetched (REST call) using a unique UUID associated with each item of the list. I store this ...
4
votes
1answer
52 views

LRU Cache in ECMAScript

I wrote this for a CodeWars challenge while trying to learn ECMAScript and would really like to have some advice on how it could be improved. What I don't like about this code myself, but am unsure ...
3
votes
1answer
59 views

Properties File MRU Cache

I made an attempt to implement a Properties File MRU Cache with a limited cache size which are of the most recently used properties can only be held in. A read miss from this cache leads to a read ...
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votes
2answers
128 views

Caching large object in multithreading environment

I'm having to dabble with caching and multithreading (thread per request), and I am an absolute beginner in that area, so any help would be appreciated. My project requirements are: Cache one ...
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0answers
39 views

Deciding when to update an image in the database

I have written a method which is used to determine whether or not I need to update an image stored in a database with an image stored on a local machine. The criteria for when an image needs to be ...
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vote
1answer
71 views

Implementation of self-updating, asynchronous cache solution of individual (non-bulk) objects

Here I am again; referring to my previous code review request about a self-updating, asynchronous (?) cache. The previous class takes care of caching operations like "get all users registered in our ...
0
votes
2answers
85 views

Implementation of asynchronous (?), self-refreshing cache of object collection bulk

I'm trying to create a caching solution used in various parts of a clients' application. The resulting code will be open source. For example, it will be used for caching API queries like "get all ...
2
votes
1answer
242 views

LRU cache design using dict and doubly linked list

Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set. get(key) - Get the value (will always be positive) of the ...
3
votes
1answer
103 views

Class for returning a different value every so often

I have a class that I'm trying to determine a good name for. I don't know if this concept comes up a lot in programming or not, but I'm wondering if I can get some suggestions for a good name for the ...
4
votes
1answer
51 views

Storing get call data on same function

I basically have a folder view structure, that each time I call grabs the value of the selected field and gets that specific folder data. I was wondering if there's a better way to do this by caching ...
5
votes
5answers
1k views

A generic cache object

I have a "generic" cache object: ...
10
votes
2answers
429 views

Memory cache implementation

I have created an open source memory cache called cachew and can be found here: cachew. I would like your help to make it better. Regarding the class Cache or its ...
2
votes
2answers
444 views

Object-cache C# Take two

I have previously attempted to write a object-cache that I use in co-junction with Redis keeping a persistent data-model. Old post can be read here Cached-object Store c# with Redis client for ...
2
votes
1answer
2k views

Cached-object Store c# with Redis client for persistent storage

I have written a Cached-Object store with a Redis Client for persistent storage. The application that is going to use this is a heavy read application with the occasional write. I assume that entire ...
7
votes
2answers
200 views

Thread-safe memoizer

I have searched around but I was not able to find a complete implementation of the memoize pattern in a multithreaded context. It's the first time playing with thread synchronization. The code seems ...
4
votes
2answers
256 views

Resource caching in Java with soft references

I'd like to cache some heavy resources locally. The goal of this implementation is to have be able to load resources for an unknown amount of time and then keep them in memory and finally evict them ...
2
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1answer
42 views

Simple BloomFilter Class

We have some BloomFilters (like a java.util.set without deletion) and we store them in ehcache (you can think it's as a ...
3
votes
1answer
1k views

Spring oauth2 token store supported by redis

I had to make a demo for Spring oauth2 with redis store for tokens. I started with the sparklr2 (with tonr2) sample app from here. They are demo apps to show oauth2 powered by spring. Sparklr is the ...
2
votes
1answer
135 views

Thread safe double buffered cache

I want cache object for one value, which have two expiration limits. One "soft" limit indicating "value is old, but is still valid, but is good time for reload the value". And one "hard" limit ...
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2answers
534 views

Caching using phpFastCache

I have a class that holds functions for caching using PHPFastCache. There are quite a few static functions in here and for each one I am declaring: ...
3
votes
1answer
438 views

Simple thread-safe loading cache based on RxJava

I'm sketching a simple thread-safe cache which can load missing values. It is based on RxJava's Observable which also means that it should be possible for a client to join a request for value which is ...
4
votes
3answers
157 views

Thread safe cache for write through and writeback

This cache is like a list where new elements are inserted in the middle, cache hits are put to head of the list and replaced elements are taken from the end. Would I just use a list the lookup would ...
3
votes
1answer
1k views

Redis Cache Data source code - Retrieve/Set/Invalidate actions

This is my RedisDataSource code. What I am mainly interested in is how the retry policy could be improved and if using WindowsAzure Trainsient Fault Handling this case (using Redis Azure Cache) makes ...
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vote
1answer
76 views

Caching DOM-queries

I've been optimizing my code and I always tend to cache common selectors like this (jQ): ...
3
votes
1answer
129 views

Reducing lock contention for a caching utility, or make it totally lockless but threadsafe

My Java program is a module called configProxy which fetches configuration entries from a remote node (say from a Redis instance). When the caller calls the ...
10
votes
2answers
128 views

Inspector Rubberduck - Take Two

Release 1.1 of Rubberduck only had a handful of implemented code inspections, more as a proof of concept than anything else. For release 1.2, we now have 19 implementations of our ...
7
votes
1answer
354 views

Cache for JSON API

I am working on a small project which utilizes a 3rd party API. Many of the queries from the API can take 5-10 seconds so to keep the front end moving a bit faster I decided to cache the responses ...
5
votes
1answer
923 views

Caching data on disk in iOS

I've got an app that's got an activity/timeline like view. Since I don't want to retrieve the entire timeline every time, I'm caching all the events. Currently, this is how I go about it: ...
6
votes
1answer
460 views

Choosing a random flat color

I have a big array of custom flat colors with perhaps 100 lines: ...
2
votes
1answer
118 views

LRU Cache Design using LinkedHashMap

This is a follow-on qestion from: LRU cache design Revised Implementation ...
3
votes
1answer
1k views

Concurrent LRU cache using sychronizedMap() or ReadWriteLock

Trying to implement a simple, thread-safe LRU cache that's meant for "read mostly" use. Collections.sychronizedMap() Clean, simple, not much else to say. ...
6
votes
1answer
587 views

LRU cache design

Idea The cache is nothing but a circular arrayList. This list contains Entry<K,V>. Whenever new entries are coming, add ...
3
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0answers
128 views

Caching in PHP using the filesystem

I wrote a simple class to cache data on a filesystem. The class also provides an internal cache using a static variable to avoid reading from disk for each request. ...
0
votes
1answer
171 views

A double mapped cache with WeakReferences for second key type

I needed a way to cache a large number of objects with two different types of keys. In my case: A String key represents my object in a serialized form. This way ...
2
votes
1answer
2k views

Local image cache for external images

I have written a simple image cache script, the purpose is to load the image locally, so i can control the cache times of the images, and i have better load times than the host server, (battle.net ...
5
votes
2answers
621 views

Time Sensitive ConcurrentDictionary

In our application, we have many function calls that we want to cache the results of. However, the result of these functions depends on database calls, so we want this cache to refresh every so often ...
5
votes
3answers
2k views

Map with different types for values

I am trying to implements a map (that can work as a cache) that has strings as keys and values of different types. In my real case once set the key/values in the map will not change. I used these ...
3
votes
2answers
794 views

Correct way of implementing thread safe factory with caching?

I have a ConnectorFactory that creates Connector objects based on parameters like URLs, username and passwords. The ...
1
vote
1answer
601 views

Memory cache service

I am repeating this code at lot of places: ...