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Add backoff delay if fetching exchange rate is failing

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This commit is contained in:
nicolas.dorier
2019-02-24 21:57:25 +09:00
parent 0253e42bd5
commit dd52075ff1
1 changed files with 6 additions and 1 deletions
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7
BTCPayServer/Services/Rates/BackgroundFetcherRateProvider.cs
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@@ -16,6 +16,7 @@ namespace BTCPayServer.Services.Rates
{
public ExchangeRates Latest;
public DateTimeOffset NextRefresh;
public TimeSpan Backoff = TimeSpan.FromSeconds(5.0);
public DateTimeOffset Expiration;
public Exception Exception;
public string ExchangeName;
@@ -90,6 +91,7 @@ namespace BTCPayServer.Services.Rates
}
public bool DoNotAutoFetchIfExpired { get; set; }
readonly static TimeSpan MaxBackoff = TimeSpan.FromMinutes(5.0);
public async Task<LatestFetch> UpdateIfNecessary()
{
@@ -142,12 +144,15 @@ namespace BTCPayServer.Services.Rates
{
fetch.Latest = previous.Latest;
fetch.Expiration = previous.Expiration;
fetch.Backoff = previous.Backoff * 2;
if (fetch.Backoff > MaxBackoff)
fetch.Backoff = MaxBackoff;
}
else
{
fetch.Expiration = DateTimeOffset.UtcNow;
}
fetch.NextRefresh = DateTimeOffset.UtcNow;
fetch.NextRefresh = DateTimeOffset.UtcNow + fetch.Backoff;
fetch.Exception = ex;
}
_Latest = fetch;