public static MemoryMappedBasedRetrievedSecrets ReadExposedSecrets(OperationContext context, string?fileName = null, int pollingIntervalInSeconds = 10)
{
string memoryMappedFileName = fileName ?? SecretsFileName;
var secrets = context.PerformOperation(
Tracer,
() =>
{
var content = MemoryMappedFileHelper.ReadContent(memoryMappedFileName);
return(RetrievedSecretsSerializer.Deserialize(content));
},
extraStartMessage: $"Obtaining secrets from '{memoryMappedFileName}'",
messageFactory: _ => $"Obtained secrets from '{memoryMappedFileName}'").ThrowIfFailure();
TimeSpan pollingInterval = TimeSpan.FromSeconds(pollingIntervalInSeconds);
Timer? timer = null;
var result = new MemoryMappedBasedRetrievedSecrets(secrets.Secrets, () => timer?.Dispose(), memoryMappedFileName);
timer = new Timer(
_ =>
{
result.RefreshSecrets(context);
try
{
timer?.Change(pollingInterval, Timeout.InfiniteTimeSpan);
} catch (ObjectDisposedException) { }
},
state: null,
dueTime: pollingInterval,
period: Timeout.InfiniteTimeSpan);
return(result);
}
public void RefreshSecrets(OperationContext context)
{
var newSecrets = context.PerformOperation(
Tracer,
() =>
{
var content = MemoryMappedFileHelper.ReadContent(MemoryMappedFileName);
return(RetrievedSecretsSerializer.Deserialize(content));
},
extraStartMessage: $"Refreshing secrets from '{MemoryMappedFileName}'",
messageFactory: _ => $"Refreshing secrets from '{MemoryMappedFileName}'");
// Now we need to update the secrets originally read from file.
if (newSecrets.Succeeded)
{
context.PerformOperation(
Tracer,
() =>
{
UpdateSecrets(this, newSecrets.Value);
return(BoolResult.Success);
}).IgnoreFailure(); // the error was already traced.
}
}