private Subscription FindSubscription(CurrencyPair currencyPair, IExchangeMonitorSubscriber subscriber)
{
lock (_subscriptions)
{
return(_subscriptions.FirstOrDefault(s => s.CurrencyPair.Equals(currencyPair) && s.Subscriber == subscriber));
}
}
/// <inheritdoc />
public void Subscribe(CurrencyPair currencyPair, IExchangeMonitorSubscriber subscriber)
{
Preconditions.CheckNotNull(currencyPair);
Preconditions.CheckNotNull(subscriber);
// Subscribe subscriber
lock (_subscriptions)
{
if (ReferenceEquals(FindSubscription(currencyPair, subscriber), null))
{
_subscriptions.Add(new Subscription(currencyPair, subscriber));
CheckChannelSubscriptions();
}
}
}
/// <inheritdoc />
public void Unsubscribe(CurrencyPair currencyPair, IExchangeMonitorSubscriber subscriber)
{
Preconditions.CheckNotNull(currencyPair);
Preconditions.CheckNotNull(subscriber);
// Unsubscribe subscriber
lock (_subscriptions)
{
var subscription = FindSubscription(currencyPair, subscriber);
if (!ReferenceEquals(subscription, null))
{
_subscriptions.Remove(subscription);
CheckChannelSubscriptions();
}
}
}
/// <summary>
/// Constructor
/// </summary>
public Subscription(CurrencyPair currencyPair, IExchangeMonitorSubscriber subscriber)
{
CurrencyPair = Preconditions.CheckNotNull(currencyPair);
Subscriber = Preconditions.CheckNotNull(subscriber);
}
