LazyCache | use thread safe in-memory caching service | Reactive Programming library

by alastairtree C# Version: 2.4.0.174 License: MIT

X-Ray Key Features Code Snippets Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | LazyCache Summary

LazyCache is a C# library typically used in Programming Style, Reactive Programming applications. LazyCache has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

An easy to use thread safe in-memory caching service with a simple developer friendly API for c#

Support

Quality

Security

License

Reuse

Support

LazyCache has a medium active ecosystem.

It has 1576 star(s) with 148 fork(s). There are 46 watchers for this library.

It had no major release in the last 12 months.

There are 39 open issues and 105 have been closed. On average issues are closed in 184 days. There are 13 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of LazyCache is 2.4.0.174

Quality

LazyCache has 0 bugs and 0 code smells.

Security

LazyCache has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

LazyCache code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

LazyCache is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

LazyCache releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

LazyCache saves you 48 person hours of effort in developing the same functionality from scratch.

It has 128 lines of code, 0 functions and 38 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of LazyCache

Get all kandi verified functions for this library.

LazyCache Key Features

No Key Features are available at this moment for LazyCache.

LazyCache Examples and Code Snippets

No Code Snippets are available at this moment for LazyCache.

Community Discussions

Trending Discussions on LazyCache

Failing to use LazyCache with Suave's WebPart

Thread safe singleton with async operation

How to Flush IAppCache Between Integration Tests

C# LazyCache concurrent dictionary garbage collection

QUESTION

Failing to use LazyCache with Suave's WebPart

Asked 2021-Jun-14 at 20:55

I'm trying to use LazyCache (https://github.com/alastairtree/LazyCache) to cache some API requests.

The code goes as this:

...

ANSWER

Answered 2021-Jun-14 at 20:55

I think you need to explicitly create Func delegate in this case, otherwise F# compiler cannot distinguish between the two overloads.

The type of the second argument (in the basic case) is Func<'T> i.e. a function taking unit and returning the value to be cached. This also means that, inside this function, you should call doAPIStuff with the parameters as arguments.

Assuming this is in some actualRequest handler that takes some, parameters, the following should work:

Source https://stackoverflow.com/questions/67974183

QUESTION

Thread safe singleton with async operation

Asked 2020-May-19 at 20:14

I have an ASP.NET MVC5 application using Ninject for DI. I have a message that is displayed at the top of every page. The message is retrieved from a web service, using an async operation. The message itself is small and updated infrequently, so I want to cache it in memory.

I've created a simple service that is configured as DI singleton. I had a nice thing going ReaderWriterLock, but that doesn't support async. So I've tried recreate the same thing with SemaphoreSlim. This is what I've got:

...

ANSWER

Answered 2020-May-19 at 20:14

Based on this post, a lot of people appear to advocate just using LazyCache. Making the implementation:

Source https://stackoverflow.com/questions/61654757

QUESTION

How to Flush IAppCache Between Integration Tests

Asked 2020-May-15 at 04:11

I'm running integration tests with xUnit in ASP.NET, and one of which ensures that querying the data multiple times results in only 1 query to the server. If I run this test alone, then it works. If I run all the tests, then the server gets queried 0 times instead of 1 by this test. Which indicates that the result was already in the cache because of other tests.

How can I ensure the IAppCache is empty at the beginning of the test? I'm using LazyCache implementation.

My guess is that the class instance is recreated for each tests, but static data is shared; and the cache is static. I don't see any "flush" method on the cache.

...

ANSWER

Answered 2020-May-15 at 04:11

As mentioned in my OP comment LazyCache afaik doesn't have a clear operation or anything native to nuke the cache. However I think there are a few options at your disposal.

Implement a method before/after each test to remove the cache entries, using Remove;
Supply a different LazyCache cache provider for the tests that doesn't persist the cache between tests
Dig into LazyCache, get the underlying cache provider and see if that has any methods to clear the cache entries

1 or 3 would be my picks. From a testing perspective, 1 means you need to know the internals of what you're testing. If it were me, I'm a bit lazy and would probably write the few lines to just nuke the cache.

By default LazyCache uses MemoryCache as the cache provider. MemoryCache doesn't have an explicit clear operation either but Compact looks like it can essentially clear the cache when the compact percentage is set to 1.0. To access it, you'll need to get the underlying MemoryCache object from LazyCache:

Source https://stackoverflow.com/questions/61739103

QUESTION

C# LazyCache concurrent dictionary garbage collection

Asked 2020-Feb-27 at 20:49

Been having some problems with a web based .Net(C#) application. I'm using the LazyCache library to cache frequent JSON responses (some in & around 80+KB) for users belonging to the same company across user sessions.

One of the things we need to do is to keep track of the cache keys for a particular company so when any user in the company makes mutating changes to items being cached we need to clear the cache for those items for that particular company's users to force the cache to be repopulated immediately upon the receiving the next request.

We choose LazyCache library as we wanted to do this in memory without needing to use an external cache source such as Redis etc as we don't have heavy usage.

One of the problems we have using this approach is we need to keep track of all the cache keys belonging to a particular customer anytime we cache. So when any mutating change is made by company user's to the relevant resource we need to expire all the cache keys belonging to that company.

To achieve this we have a global cache which all web controllers have access to.

...

ANSWER

Answered 2020-Feb-27 at 20:49

Large objects (> 85k) belong in gen 2 Large Object Heap (LOH), and they are pinned in memory.

GC scans LOH and marks dead objects
Adjacent dead objects are combined into free memory
The LOH is not compacted
Further allocations only try to fill in the holes left by dead objects.

No compaction, but only reallocation may lead to memory fragmentation. Long running server processes can be done in by this - it is not uncommon. You are probably seeing fragmentation occur over time.

Server GC just happens to be multi-threaded - I wouldn't expect it to solve fragmentation.

You could try breaking up your large objects - this might not be feasible for your application.

You can try setting LargeObjectHeapCompaction after a cache clear - assuming it's infrequent.

Source https://stackoverflow.com/questions/60063845

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install LazyCache

LazyCache is available using nuget. To install LazyCache, run the following command in the Package Manager Console.
See the quick start wiki.

Support

The latest version targets netstandard 2.0. See .net standard implementation support. For dotnet core 2, .net framwork net461 or above, netstandard 2+, use LazyCache 2 or above. For .net framework without netstandard 2 support such as net45 net451 net46 use LazyCache 0.7 - 1.x. For .net framework 4.0 use LazyCache 0.6.

Find more information at: