/// <summary>
/// Override this method to handle an offline announcement message.
/// </summary>
/// <param name="messageSequence">The discovery message sequence.</param>
/// <param name="endpointDiscoveryMetadata">The endpoint discovery metadata.</param>
/// <param name="callback">The callback delegate to call when the operation is completed.</param>
/// <param name="state">The user-defined state data.</param>
/// <returns>
/// A reference to the pending asynchronous operation.
/// </returns>
protected override IAsyncResult OnBeginOfflineAnnouncement(DiscoveryMessageSequence messageSequence, EndpointDiscoveryMetadata endpointDiscoveryMetadata, AsyncCallback callback, object state)
{
if (endpointDiscoveryMetadata == null)
{
throw new ArgumentNullException("endpointDiscoveryMetadata");
}
FindCriteria criteria = new FindCriteria(typeof(T));
if (criteria.IsMatch(endpointDiscoveryMetadata))
{
// 指定类型的服务下线
if (cache.Contains(endpointDiscoveryMetadata.Address.Uri))
{
cache.Remove(endpointDiscoveryMetadata);
Console.WriteLine(string.Format(CultureInfo.InvariantCulture, "Discovery proxy endpoint offline : {0} - {1}", endpointDiscoveryMetadata.GetSpecifiedName(), endpointDiscoveryMetadata.Address.Uri));
}
}
return(new CompletedAsyncResult(callback, state));
}
private void OnOfflineAnnouncement(object sender, AnnouncementEventArgs e)
{
EndpointDiscoveryMetadata metadata = e.EndpointDiscoveryMetadata;
FindCriteria criteria = new FindCriteria(typeof(T));
if (criteria.IsMatch(metadata))
{
// 指定类型的服务下线
if (cache.Contains(metadata.Address.Uri))
{
cache.Remove(metadata);
Console.WriteLine(string.Format(CultureInfo.InvariantCulture, "Announcement endpoint offline : {0} - {1}", metadata.GetSpecifiedName(), metadata.Address.Uri));
}
}
}