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Check cache for currency rate before run async util

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This commit is contained in:
Sergey Chebotar 2023-06-08 07:47:14 +03:00
parent 1399d71f3c
commit 213592b9e2
2 changed files with 41 additions and 45 deletions
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32
RhSolutions.AddIn/AddIn/RhSolutionsFunctions.cs
View File

@ -2,6 +2,8 @@
using System.Runtime.Versioning;
#endif
using Microsoft.Extensions.Caching.Memory;
namespace RhSolutions.AddIn;
#if !NET472
@ -190,29 +192,33 @@ public class RhSolutionsFunctions
public static object КУРСЕВРО([ExcelArgument(Name = "ДАТА", Description = "Дата в формате Excel (необязательно)")] double dateField)
{
ICurrencyClient currencyClient = RhSolutionsAddIn.ServiceProvider.GetRequiredService<ICurrencyClient>();
if (ExcelAsyncUtil.Run(nameof(КУРСЕВРО), dateField, delegate
{
IMemoryCache memoryCache = RhSolutionsAddIn.ServiceProvider.GetRequiredService<IMemoryCache>();
DateTime date = dateField == 0 ? DateTime.Today : DateTime.FromOADate(dateField);
var exchangeRate = currencyClient.GetCurrencyCourse(date)
if (!memoryCache.TryGetValue(date, out decimal exchangeRate))
{
var result = ExcelAsyncUtil.Run(nameof(КУРСЕВРО), dateField, delegate
{
var requestResult = currencyClient.GetCurrencyCourse(date)
.GetAwaiter()
.GetResult();
return exchangeRate ?? -1m;
}) is not decimal requestResult)
return requestResult ?? -1m;
});
if (result is not decimal)
{
return "Загрузка...";
}
else
{
if (requestResult < 0)
{
return ExcelError.ExcelErrorNA;
}
else
{
return Math.Round(requestResult, 2);
exchangeRate = (decimal)result;
var cacheEntryOptions = new MemoryCacheEntryOptions()
.SetSlidingExpiration(TimeSpan.FromHours(1));
memoryCache.Set(date, exchangeRate, cacheEntryOptions);
}
}
return exchangeRate < 0 ? ExcelError.ExcelErrorNA : exchangeRate;
}
}

26
RhSolutions.AddIn/Services/CurrencyClient.cs
View File

@ -1,5 +1,4 @@
using Microsoft.Extensions.Caching.Memory;
using System.Net;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Xml.Linq;
@ -9,28 +8,25 @@ namespace RhSolutions.Services;
public class CurrencyClient : ICurrencyClient
{
private readonly HttpClient _httpClient;
private readonly IMemoryCache _memoryCache;
private const string requestAddress = @"https://www.cbr.ru/scripts/XML_daily.asp?date_req=";
private const string _requestAddress = @"https://www.cbr.ru/scripts/XML_daily.asp?date_req=";
public HttpStatusCode StatusCode { get; private set; }
public CurrencyClient(HttpClient httpClient, IMemoryCache memoryCache)
public CurrencyClient(HttpClient httpClient)
{
_httpClient = httpClient;
_memoryCache = memoryCache;
}
public async Task<decimal?> GetCurrencyCourse(DateTime date)
{
if (!_memoryCache.TryGetValue(date, out decimal? exchangeRate))
{
string request = $"{requestAddress}{date.Date:dd/MM/yyyy}";
string request = $"{_requestAddress}{date.Date:dd/MM/yyyy}";
HttpResponseMessage response = await _httpClient.GetAsync(request);
try
{
response.EnsureSuccessStatusCode();
string xml = await response.Content.ReadAsStringAsync();
XElement valCourses = XElement.Parse(xml);
exchangeRate = decimal.Parse(valCourses.Elements("Valute")
decimal? exchangeRate = decimal.Parse(valCourses.Elements("Valute")
.Where(e => e.Element("Name").Value == "Евро")
.FirstOrDefault()
.Element("Value").Value);
@ -39,13 +35,7 @@ public class CurrencyClient : ICurrencyClient
catch
{
StatusCode = response.StatusCode;
exchangeRate = null;
}
var cacheEntryOptions = new MemoryCacheEntryOptions()
.SetSlidingExpiration(TimeSpan.FromHours(1));
_memoryCache.Set(date, exchangeRate, cacheEntryOptions);
}
return exchangeRate;
return null;
}
}
}