public async Task <AggregateHealthRecord> InternalIsHealthyAsync()
{
await _semaphoreSlim.WaitAsync();
try
{
if (HealthRecords.IsEmpty)
{
return(null);
}
var unHealtyRecords = new List <string>();
foreach (var item in HealthRecords)
{
if (item.Value.Healty == false)
{
unHealtyRecords.Add(item.Key);
}
}
if (unHealtyRecords.Any())
{
return(AggregateHealthRecord.Unhealthy(unHealtyRecords.ToArray()));
}
return(AggregateHealthRecord.Healthy());
}
finally
{
//When the task is ready, release the semaphore. It is vital to ALWAYS release the semaphore when we are ready, or else we will end up with a Semaphore that is forever locked.
//This is why it is important to do the Release within a try...finally clause; program execution may crash or take a different path, this way you are guaranteed execution
_semaphoreSlim.Release();
}
}
public async Task SetHealthAsync(string key, HealthRecord healthRecord)
{
HealthRecords[key] = healthRecord;
_aggregateRecord = await InternalIsHealthyAsync();
}
public HealthCheckStore()
{
HealthRecords = new ConcurrentDictionary <string, HealthRecord>();
_aggregateRecord = AggregateHealthRecord.Unhealthy(new [] { "" });
}
