New project wizard too quiet while downloading

[Alexander Taler]

When I'm using the new project wizard to download something, e.g. bzr-eclipse itself, the UI gives no indication that anything is happening in the background. For a large project it can stay in this state for quite a while which is unnerving.

The UI should provide some feedback that something is happening in the background so I don't just go ahead and cancel it.

[Piotr Piastucki (piastucki)]

It would be great to show the actual progress. Unfortunately, such a feature would require quite a few changes in xmloutput (UIFactory) and bzr-java-lib. And of course we will need to find a good way to pass the progress info from xmloutput to java code (socket? file?).

[Alexander Taler (alex-idereal)]

Yes, I was thinking exactly the same thing. At the least we should just add a message, saying "Accessing remote branch" or similar.

[Piotr Piastucki (piastucki)]

OK, here is a proof of concept:
1) bzr-xmloutput lp:~piastucki/bzr-xmloutput/progress-monitor
2) bzr-java-lib lp:~piastucki/bzr-java-lib/progress-monitor
It introduces and a new XMLRPC command called 'get_bzr_progress'. There is a simple polling mechanism in bzr-java-lib that will ask for progress update every 0.5sec and report it to a listener passed along with a command. A test case is added to BazaarClientTest.
Java code involved some internal refactoring related to passing Command object rather than a List<String> (desired anyway) and some API changes for selected commands. Currently the feature is supported in branch and checkout commands.
The changes in bzr-xmloutput are rather ugly due to an additional instance of XMLRPC server (I used port+1). Unfortunately the XMLRPC server in Python is single-threaded by default and I am hesitant to change this behaviour for all calls.

The value passed to progress listeners is exactly the same as the one shown in the console.

[Piotr Piastucki (piastucki)]

I've just committed a fix. Please test and let me know what you think.

[Piotr Piastucki (piastucki)]

Here is what the result looks like on Linux

[Alexander Taler (alex-idereal)]

I've been trying it out, looks really good so far, nice.

Verified, the fix is there in latest trunk version.