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/*
* Copyright (c) 2024 Vaughn Nugent
*
* Library: VNLib
* Package: VNLib.Data.Caching.Extensions
* File: CacheSiteAdapter.cs
*
* CacheSiteAdapter.cs is part of VNLib.Data.Caching.Extensions which is part of the larger
* VNLib collection of libraries and utilities.
*
* VNLib.Data.Caching.Extensions is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* VNLib.Data.Caching.Extensions is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
using System;
using System.Net;
using System.Security;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using RestSharp;
using VNLib.Net.Rest.Client;
using VNLib.Net.Rest.Client.Construction;
namespace VNLib.Data.Caching.Extensions.ApiModel
{
/// <summary>
/// A site adapter for cache REST api requests
/// </summary>
internal sealed class CacheSiteAdapter : RestSiteAdapterBase
{
/*
* Lazy to defer errors for debuggong
*/
private static readonly Lazy<CacheSiteAdapter> _lazy = new(() => ConfigureAdapter(2));
internal static CacheSiteAdapter Instance => _lazy.Value;
private static CacheSiteAdapter ConfigureAdapter(int maxClients)
{
CacheSiteAdapter adapter = new(maxClients);
//Configure the site endpoints
adapter.BuildEndpoints(ServiceEndpoints.Definition);
return adapter;
}
protected override RestClientPool Pool { get; }
public CacheSiteAdapter(int maxClients)
{
//Configure connection pool
Pool = new(maxClients, new RestClientOptions()
{
MaxTimeout = 10 * 1000,
FollowRedirects = false,
Encoding = Encoding.UTF8,
AutomaticDecompression = DecompressionMethods.All,
ThrowOnAnyError = true
});
}
public override void OnResponse(RestResponse response)
{
switch(response.StatusCode)
{
case HttpStatusCode.OK:
break;
case HttpStatusCode.Unauthorized:
throw new SecurityException("Unauthorized access to cache service");
case HttpStatusCode.Forbidden:
throw new SecurityException("Forbidden access to cache service");
case HttpStatusCode.NotFound:
throw new InvalidOperationException("Cache service not found");
case HttpStatusCode.InternalServerError:
throw new InvalidOperationException("Cache service internal error");
default:
throw new InvalidOperationException($"Cache service error: {response.StatusCode}");
}
}
public override Task WaitAsync(CancellationToken cancellation = default)
{
return Task.CompletedTask;
}
}
}
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