Use cache-invalidation for questions related to purging content from a cache based on a state change in the cached object or a canonical object that it shadows
"There are only two hard problems in Computer Science: cache invalidation and naming things."
Phil Karlton
Is there a general solution or method to invalidating a cache; to know when an entry is stale, so you are guaranteed to always get fresh…
I have a Jekyll bootstrap based blog hosted on Github pages.
My problem is: Every time I change something on my web page, I have to forcefully reload the page (CTRL + R) to see the changes.
Jekyll or my browser does not seem to realize that there is…
How do I use Flask-Cache @cache.cached() decorator with Flask-Restful? For example, I have a class Foo inherited from Resource, and Foo has get, post, put, and delete methods.
How can I can invalidate cached results after a…
I am using android studio 2.3.1 and it was working fine yesterday But now it throw me an error Error:Cause: invalid stream header: 000900D9
this message throw from Messages Gradle Sync dialog.
Below are the steps which i did to fixed this problem…
I recently learned about the row hammer attack. In order to perform this attack the programmer needs to flush the complete cache hierarchy of a CPU for a specific number of addresses.
My question is: why is CLFLUSH necessary in x86? What are the…
I want to cache a Post view, but the view depends on the permissions of the current user (e.g., I only show the "edit" link if current_user.can?(:edit, @post))
So I'd like my cache key to include a representation of the current user's CanCan…
There is a popular question on how to force-clear the cache of the browser in a VanillaJS application, with the general consensus being, setting the name of the .js-script or the scripts arguments to a new value: Force browser to clear cache
How can…
I'm using Doctrine 2's result cache on a query retrieving the number of new messages of a user (messaging app):
$query->useResultCache(true, 500, 'messaging.nb_new_messages.'.$userId);
I tried to invalidate this cache like this (in my entity…
I have a Java based web app hosted on AWS. It is read-mostly so it makes a lot of sense to cache objects retrieved from the database for performance.
When I do update an object, I would like to be able to broadcast to all the servers that the…
I'm having some weird issues with my custom Dockerfile, compiling a .Net core app in alpine containers.
I've tried numerous different configurations to no avail - cache is ALWAYS invalidated when I implement the final FROM instruction (if I comment…
I'm developing an app in React that does encryption on the client-side and sends the encrypted content back to the server for secure storage (e.g. think of online-wallets). This works well since the data is secure in case someone malicious gets…
I am appending hash ids to bundles generated by webpack. Whenever I get a new build I see that filenames are changed with new hash and index.html file is referencing these files. But after deploying my app, some users using Chrome don't see the new…
I want to invalidate cache using VaryByCustom attribute.
Following code is being used for cache setup.
public override string GetVaryByCustomString(HttpContext context, string arg)
{
if (!string.IsNullOrWhiteSpace(arg))
{
if…
I am trying to invalidate CloudFront objects in C#/.NET and gettign the following exception:
Your request contains one or more invalid invalidation paths.
My Function:
public bool InvalidateFiles(string[] arrayofpaths)
{
for (int i = 0; i <…
I need to implement pull to refresh in an iOS app, and I came across this thing, in where I don't know how to approach the problem with the best practices of DDD.
The presentation layer has an event to refresh a list, this needs to update the…
