/// <summary> Remove a listener from all outstanding questions. The listener will no longer
/// receive any updates.
/// </summary>
internal virtual void RemoveListener(IDNSListener listener)
{
lock (this)
{
listeners.Remove(listener);
}
}
/// <summary> Add a listener for a question. The listener will receive updates
/// of answers to the question as they arrive, or from the cache if they
/// are already available.
/// </summary>
internal virtual void AddListener(IDNSListener listener, DNSQuestion question)
{
long now = (DateTime.Now.Ticks - 621355968000000000) / 10000;
// add the new listener
lock (this)
{
listeners.Add(listener);
}
// report existing matched records
if (question != null)
{
for (DNSCache.CacheNode i = cache.find(question.name); i != null; i = i.Next)
{
DNSRecord c = (DNSRecord)i.Value;
if (question.IsAnsweredBy(c) && !c.IsExpired(now))
{
listener.UpdateRecord(this, now, c);
}
}
}
}
/// <summary> Remove a listener from all outstanding questions. The listener will no longer
/// receive any updates.
/// </summary>
internal virtual void RemoveListener(IDNSListener listener)
{
lock (this)
{
listeners.Remove(listener);
}
}
/// <summary> Add a listener for a question. The listener will receive updates
/// of answers to the question as they arrive, or from the cache if they
/// are already available.
/// </summary>
internal virtual void AddListener(IDNSListener listener, DNSQuestion question)
{
long now = (DateTime.Now.Ticks - 621355968000000000) / 10000;
// add the new listener
lock (this)
{
listeners.Add(listener);
}
// report existing matched records
if (question != null)
{
for (DNSCache.CacheNode i = cache.find(question.name); i != null; i = i.Next)
{
DNSRecord c = (DNSRecord) i.Value;
if (question.IsAnsweredBy(c) && !c.IsExpired(now))
{
listener.UpdateRecord(this, now, c);
}
}
}
}
