public SrvLookup <TService> GetOrAdd(string serviceName, SrvLookupFunction <TService> lookupFunc)
{
// ReSharper disable once InlineOutVariableDeclaration
SrvLookup <TService> result;
// ReSharper disable once InconsistentlySynchronizedField
if (_bag.TryGetValue(serviceName, out result) && (result != null))
{
return(result);
}
lock (_syncLock)
{
if (_bag.TryGetValue(serviceName, out result) && (result != null))
{
return(result);
}
result = lookupFunc(serviceName);
_bag[serviceName] = result;
// fire update event
Updated?.Invoke(this, new ServiceCacheUpdateEventArgs {
DnsName = serviceName
});
return(result);
}
}
public SrvLookup <TService> CheckAndUpdate(string serviceName, SrvLookup <TService> oldValue, SrvLookupFunction <TService> lookupFunc)
{
lock (_syncLock)
{
// ReSharper disable once InlineOutVariableDeclaration
SrvLookup <TService> result;
// if already updated
if (_bag.TryGetValue(serviceName, out result) && (!ReferenceEquals(result, oldValue)))
{
return(result);
}
result = lookupFunc(serviceName);
_bag[serviceName] = result;
// fire updated event
Updated?.Invoke(this, new ServiceCacheUpdateEventArgs {
DnsName = serviceName
});
return(result);
}
}
