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

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3
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1answer
23 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 ...
5
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2answers
70 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 ...
1
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0answers
35 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 ...
1
vote
1answer
29 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
59 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
73 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
82 views

Naming request for a class to return 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
44 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
846 views

A generic cache object

I have a "generic" cache object: ...
10
votes
2answers
317 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
152 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
374 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 ...
6
votes
1answer
125 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
108 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
votes
1answer
38 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
513 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
101 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 ...
0
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2answers
255 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: ...
2
votes
1answer
211 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
114 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
544 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 ...
1
vote
1answer
68 views

Caching DOM-queries

I've been optimizing my code and I always tend to cache common selectors like this (jQ): ...
3
votes
1answer
88 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
121 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
243 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
441 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
276 views

Choosing a random flat color

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

LRU Cache Design using LinkedHashMap

This is a follow-on qestion from: LRU cache design Revised Implementation ...
3
votes
1answer
407 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
451 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
votes
0answers
98 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
118 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
1k 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
381 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
1k 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
451 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
388 views

Memory cache service

I am repeating this code at lot of places: ...
2
votes
1answer
145 views

Clear cache files older than 30 minutes

This is what I came up with to delete files not modified within the last 30 minutes from a subdirectory named cache. ...
4
votes
1answer
356 views

Using concurrent dictionary as first-level cache

I am currently implementing a thread-safe in-memory cache mechanism, with the intent of storing objects that are expensive to create or often used by the system. I also want to include an expiration ...
10
votes
4answers
476 views

Ugly optimized caching of SimpleDateFormat

Concerning the optimization of this simple function String formatDate(String format, Locale locale, Date date) {...} formatting a ...
3
votes
0answers
205 views

Rails app that scrapes forum using Nokogiri gem

I've built a website that scrapes a guitar forum's pages and populates Rails model. I'm using rake task along with heroku scheduler to run background scrapes every hour. On the homepage, the forum ads ...
3
votes
2answers
711 views

Thread-safe, in-memory LRU cache with a maximum item count of 10

I'm attempting to master LRU Caching. It must be thread safe, and it should preferably perform as well as web image-cache, (avg ~1MB). Please take a look to see if there's anything wrong, amiss, ...
2
votes
2answers
145 views

Database mirroring cache

I generally prefer to work with EF by specifying exactly the data to fetch from the DB with regards to Navigation Properties/Lookups and the like, so we wrote this cache system to limit the number of ...
3
votes
1answer
2k views

Using EHCache the right way

I use EHCache to maintain a mostly read-only cache of results from database queries. It works perfectly for over a dozen queries. However, there is one table which needs an odd access method that is ...
4
votes
2answers
2k views

Simple LRU cache with an expiration time

How can I improve the performance of the code below? ...
4
votes
1answer
171 views

Python caching generator

Is this the correct way to cache a generator in Python, without iterating over it right away (for example using list() over it)? ...
3
votes
2answers
115 views

Azure cache getoradd (without locking)

Inspired by the non-locking implementation proposed in this post, the following code is an attempt to (about) do the same using the azure cache. As I'm totally green on the Azure cache I'd appreciate ...
12
votes
4answers
280 views

I'm not sure if I still love Fibonacci, but my code is getting better. How much better?

Technically, this is a follow up to these two questions, but I have taken a radically different approach. Everybody Loves Fibonacci Does everyone still love Fibonacci I finally allowed myself to ...
1
vote
0answers
354 views

HttpRuntime.Cache cache manager class

I am making code review of legacy class, which manages caching logic. Caching logic uses ASP.NET webforms HttpRuntime.Cache. I know class, that is posted below, is ...
4
votes
2answers
649 views

Creating a cache manager

I am purely new to C++ memory management. Am I on the right path, or should I employ a different design strategy or a different memory manager policy (such as ...