/// <summary>
/// 根据过滤条件和接口契约查找服务注册者
/// </summary>
/// <param name="clazz"></param>
/// <param name="filter"></param>
/// <returns></returns>
private IList LookupServiceRegistrations(string clazz, IFilter filter)
{
IList result;
lock (this)
{
if (clazz == null)
{ /* all services */
result = allPublishedServices;
}
else
{
/* services registered under the class name */
result = (IList)publishedServicesByClass[clazz];
}
if ((result == null) || (result.Count == 0))
{
return(null);
}
result = new ArrayList(result); /* make a new list since we don't want to change the real list */
}
if (filter == null)
{
return(result);
}
IList listWaitForDeleting = new ArrayList();
var iter = result.GetEnumerator();
while (iter.MoveNext())
{
ServiceRegistrationImpl registration = (ServiceRegistrationImpl)iter.Current;
ServiceReferenceImpl reference;
try
{
reference = registration.GetReferenceImpl();
}
catch (Exception e)
{
Log.Warn(e);
listWaitForDeleting.Add(iter.Current); /* service was unregistered after we left the synchronized block above */
continue;
}
if (!filter.Match(reference))
{
listWaitForDeleting.Add(iter.Current);
}
}
foreach (var item in listWaitForDeleting)
{
result.Remove(item);
}
return(result);
}