internal CouchContinuousChanges(DreamMessage aMessage, CouchChangeDelegate aCallback)
{
if (aMessage == null)
{
throw new ArgumentNullException("aMessage");
}
if (aCallback == null)
{
throw new ArgumentNullException("aCallback");
}
theReader = new AsyncStreamReader(aMessage.ToStream(), (x, y) => {
if (!String.IsNullOrEmpty(y.Line))
{
CouchChangeResult result = theSerializer.Deserialize(y.Line);
aCallback(this, result);
}
});
}
private void OnChanged(object sender, CouchChangeResult<JDocument> aChange){
SetSequence(aChange.Sequence);
JToken jtoken;
aChange.Doc.TryGetValue("otype", out jtoken);
if(jtoken == null)
return;
switch (jtoken.Value<string>())
{
case "score":
if (ScoreChanged != null)
{
ScoreChanged(this, new EventArgs<IScore> { Item = new JScore(aChange.Doc) });
}
break;
case "play":
if (PlayChanged != null)
{
PlayChanged(this, new EventArgs<IPlay> { Item = new JPlay(aChange.Doc) });
}
break;
case "source":
if (SourceChanged != null)
{
SourceChanged(this, new EventArgs<ISource> { Item = new JSource(aChange.Doc) });
}
break;
case "sourcePage":
if (SourcePageChanged != null)
{
SourcePageChanged(this, new EventArgs<ISourcePage> { Item = new JSourcePage(aChange.Doc) });
}
break;
}
}
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
);
}
}
