private void Execute()
{
DateTime now = DateTime.Now;
if (monitors.Count > 0)
{
using (SPSite site = new SPSite(siteId, SPUserToken.SystemAccount)) {
List <SPChange> collection = new List <SPChange>();
SPChangeQuery query = CreateQuery(lastCheckTime);
SPChangeCollection result = site.GetChanges(query);
while (result.Count > 0)
{
collection.AddRange(result.OfType <SPChange>());
query.ChangeTokenStart = result.LastChangeToken;
result = site.GetChanges(query);
}
if (collection.Count > 0)
{
Dictionary <Tuple <Type, object>, SPAggregatedChange> dictionary = new Dictionary <Tuple <Type, object>, SPAggregatedChange>();
foreach (SPChange item in collection)
{
SPAggregatedChange record = dictionary.EnsureKeyValue(Tuple.Create(item.GetType(), SPChangeMonitor.GetUniqueKey(item)));
record.Add(item);
}
foreach (SPChangeMonitor monitor in monitors)
{
monitor.ProcessChanges(dictionary.Values);
}
}
}
}
lastCheckTime = now;
}
