Sunday, August 06, 2006

Live coding with MonoRail

In my constant quest to bring Castle MonoRail closer to Ruby on Rails development style, one of the thing that kept me from choosing MonoRail over Rails for fun and pleasure was the code-compile-refresh process. Because we're working in the static compiled world, a usual scenario looks like this.

  1. Add or remove some code

  2. Compile from the IDE or run NAnt

  3. Restart the web server (under *nix XSP needs to be restarted to load the new assembly)

  4. Refresh the browser (and wait for the app to restart AR and all other services)

This is painful! Why can't we just code and refresh like with scripting languages?

While reading an article on reddit about Live coding, I had a idea...

# Rebuilds the project periodically and restarts the web server on success

import System
import System.IO
import System.Threading
import System.Diagnostics

SERVER_CMD = 'xsp2'
SERVER_ARGUMENTS = '--root public'
NANT_ARGUMENTS = 'build -nologo -q'
PROJECT_ASSEMBLY = 'public/bin/MyBlog.dll'
REBUILD_DELAY = 1000 #ms

serverProcess as Process
lastWriteTime as DateTime

print "Starting runner process, hit CTRL+C to stop"
while (true):
buildProcess = shellp('nant', NANT_ARGUMENTS)

if buildProcess.ExitCode == 0:
if FileInfo(PROJECT_ASSEMBLY).LastWriteTime > lastWriteTime:
print "Project recompiled, restarting the server"
if serverProcess != null:
# Stops the server
except e:
serverProcess = null
serverProcess = shellp(SERVER_CMD, SERVER_ARGUMENTS)
lastWriteTime = FileInfo(PROJECT_ASSEMBLY).LastWriteTime
print buildProcess.StandardOutput.ReadToEnd()

# Waits a couple of seconds

If you can't see what this is about...

The other thing that keep me from dropping Rails for MonoRail is C# extra verbose and lack of fun and style. But I can't do nothing about that, except use Boo whenever I can.

Note that this script will soon be integrated in the Generator so when you generate a new MonoRail project, the server script while run something like this.


Blogger Diego said...


12:13 p.m.  
Anonymous Anonymous said...

Can you make your video's a bit larger so the text is clearer.


5:46 a.m.  
Blogger MAC said...

The original video is 800x600 but Google Video shrinks it. You still can see it there:

But the quality is still not the best

I'll try to find a better solution

8:24 a.m.  
Anonymous Anonymous said...

You it to like
music book
kelly blue book
download players and book
nada blue book
book a million
book of love
book on cd
jungle book

5:52 a.m.  

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