public async Task <GlobalCurrencyRate> GetAsync()
{
if (_globalCurrencyRate != null)
{
return(_globalCurrencyRate);
}
await _semaphore.WaitAsync();
try
{
if (_globalCurrencyRate == null)
{
_globalCurrencyRate = await _globalCurrencyRateRepository.GetAsync();
if (_globalCurrencyRate == null)
{
_globalCurrencyRate = new GlobalCurrencyRate {
AmountInTokens = 1, AmountInCurrency = 1
}
}
;
}
}
finally
{
_semaphore.Release();
}
return(_globalCurrencyRate);
}
public async Task UpdateAsync(GlobalCurrencyRate globalCurrencyRate)
{
await _semaphore.WaitAsync();
try
{
await _globalCurrencyRateRepository.InsertOrUpdateAsync(globalCurrencyRate);
_globalCurrencyRate = globalCurrencyRate;
}
finally
{
_semaphore.Release();
}
}
public async Task InsertOrUpdateAsync(GlobalCurrencyRate globalCurrencyRate)
{
using (var context = _contextFactory.CreateDataContext())
{
var entity = await context.GlobalCurrencyRates.FirstOrDefaultAsync();
if (entity == null)
{
entity = new GlobalCurrencyRateEntity {
Id = Guid.NewGuid()
};
context.GlobalCurrencyRates.Add(entity);
}
_mapper.Map(globalCurrencyRate, entity);
await context.SaveChangesAsync();
}
}
