如何在自托管的WebAPI应用程序中正确缓存数据

Question

I have a C# WebAPI application, self-hosted with TopShelf. I need to optimize some of my data access by querying a few databases upon application start-up, and then caching the results (which are static) for any subsequent access by my WebAPI controllers. My solution consists of two projects:

ServiceHub.Topshelf.WebAPI (which contains all business logic) and Topshelf.WebPI (whic only hosts WebApiConfigurator.cs)

What is the proper technique for doing this type of data caching?

Answer 1

As Ric suggested, I've looked at the Cache class. Here is what I did in my SIgnedContractsController.csc to accomplish the caching:

using System.Runtime.Caching;
.....
ObjectCache cache;
List<Model.SignedContracts> allSignedContracts;
.....

cache = MemoryCache.Default;
            allSignedContracts = cache["signed_contracts"] as List<Model.SignedContracts>;

            if (allSignedContracts == null)
            {
                allSignedContracts = new List<Model.SignedContracts>();
                CacheItemPolicy policy = new CacheItemPolicy();
                policy.AbsoluteExpiration = DateTimeOffset.Now.AddHours(1.0);
                var result = (from contracts in new XPQuery<Model.SignedContracts>(uow) select contracts);
                foreach (var item in result)
                {
                    allSignedContracts.Add(item); 
                }
                cache.Add("signed_contracts",allSignedContracts,policy);

            }

Then, in the GET method I did this:

public HttpResponseMessage Get()
        {

            var _americasPriorWeekThree = Convert.ToInt32((from contracts in allSignedContracts
                                                           where contracts.Region == "Americas"
                                                       select contracts.PriorWeek3).First());

.......