Rx Publish() breaks IObservable of XDocuments

Question

I have the following Rx Query that produces a IObservable problem is it does not work with Publish() so as the number of subscribers increases so does the memmory load

// Works
Observable
    .Interval(TimeSpan.FromSeconds(1.0))
    .Select(_ => XDocument.Load("http://test.com/data.xml"));

// Broken
Observable
    .Interval(TimeSpan.FromSeconds(1.0))
    .Select(_ => XDocument.Load("http://test.com/data.xml")).Publish();

Is there a better way of createing such an Observable?

What does " does not work with Publish() " mean? – Robert Harvey Feb 23 '12 at 16:14 — Robert Harvey, Feb 23 '12 at 16:14
You didn't Connect() after the Publish. – Ana Betts Feb 23 '12 at 20:49 — Ana Betts, Feb 23 '12 at 20:49

score 2 · Accepted Answer · answered Feb 23 '12 at 20:50

2

Until you call Connect(), the IConnectableObservable is disconnected from its source, so nothing is going to happen (Interval won't start its timer) until somebody Subscribe's to it. Connect() will make the Publish subscribe to its source.

answered Feb 23 '12 at 20:50

Ana Betts

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Rx Publish() breaks IObservable of XDocuments

1 Answers1