private void OnContactChanged(CouchChangeResult aChangeResult)
{
//add to the list of changes
Items.Add(aChangeResult);
//record the sequence number of the change so when we run the application we
//tell that we only need changes > this number.
//(Otherwise you get a change message for every doc in the db at the startup)
SetSequence(aChangeResult.Sequence);
//verifiy type of change announced so we know if we need to refresh a contact
if (aChangeResult.Id.StartsWith("_design"))
{
return;
}
if (aChangeResult.Deleted)
{
OnContactDeleted(aChangeResult.Id);
}
else
{
Console.WriteLine("Retrieving last version of {0}", aChangeResult.Id);
//get the latest version of this document
theDatabase.GetDocument(aChangeResult.Id, new Result <Contact>()).WhenDone(
a => BeginInvoke((MethodInvoker)(() => OnContactChanged(a))),
ErrorManagement.ProcessException
);
}
}
private static void ChangesListBoxFormat(object sender, ListControlConvertEventArgs e)
{
CouchChangeResult change = e.ListItem as CouchChangeResult;
if ((change != null) && (change.Changes.Length >= 1))
{
e.Value = String.Format("{0:0000}\t{1}\t{2}", change.Sequence, change.Id, change.Changes[0].ToString());
}
}
/// <summary>
/// Determine whether the given sequence number
/// matches the most up-to-date status.
/// </summary>
public bool LastSequenceNumberChanged(int since)
{
using (JtTimer pt = new JtTimer(
"LastSequenceNumberChanged"))
{
ChangeOptions opt = new ChangeOptions();
opt.Since = since;
opt.IncludeDocs = false;
CouchChanges <DbFurniture> changes
= _db.GetChanges <DbFurniture>(opt);
CouchChangeResult <DbFurniture> r
= changes.Results.LastOrDefault <
CouchChangeResult <DbFurniture> >();
Debug.Assert(null == r || since < r.Sequence,
"expected monotone growing sequence number");
return(null != r && since < r.Sequence);
}
}
