Merge lp:~vds/ubuntuone-windows-installer/twisted_ipc_1 into lp:ubuntuone-windows-installer/beta

[Vincenzo Di Somma]

Very basic ipc services.

[lp:~vds/ubuntuone-windows-installer/twisted_ipc_1]

35. By vincenzo di somma <vds@blackrain> on 2010-08-11

removed useless test file

[Manuel de la Peña (mandel)]

Great starting step. +1

review: Approve

[Nicola Larosa (teknico)]

This is fairly low level, and old style.

A more extensible structure would be to use applications and services: http://twistedmatrix.com/documents/current/core/howto/application.html , but then you could not pass command line arguments to the twistd command running the .tac file.

Another possibiliy would be to write a plugin: http://twistedmatrix.com/documents/current/core/howto/plugin.html , but it's a bit verbose, and I'm not sure about command line options.

The API servers use .tac files taking the parameters from the config files and the environments, do you absolutely have to use command line options?

review: Needs Information

[Nicola Larosa (teknico)]

You could possibly do something like this: http://twistedmatrix.com/pipermail/twisted-python/2005-May/010542.html , if you really need command line options.

[Vincenzo Di Somma (vds)]

Thanks for the useful comments, I'm going through the docs!
Just to give more context, this small daemon is supposed to on the windows desktop not on a server, the port will be assigned by the C# application when the it starts. The C# application could write the .tac itself but as we don't see any other configuration or parameter we want to use and we don't expect to reuse this daemon in other ways a .toc file seems an overkill, we just need two port numbers.

[Nicola Larosa (teknico)]

Ok, if it's not a long-running daemon, and its lifetime is controlled by another application, then probably using twistd and .tac file is uncalled for.

review: Approve

=== added directory 'src/ipcservice'
=== added file 'src/ipcservice/__init__.py'
=== added file 'src/ipcservice/ipcservice.py'
--- src/ipcservice/ipcservice.py	1970-01-01 00:00:00 +0000
+++ src/ipcservice/ipcservice.py	2010-08-11 16:44:49 +0000
@@ -0,0 +1,42 @@
+import sys
+from twisted.internet.protocol import Factory, Protocol, ClientFactory
+from twisted.internet import reactor
+
+
+class IPCServerProtocol(Protocol):
+    """ """
+    def dataReceived(self, data):
+        print "doing something with: ",  data
+
+class IPCServerFactory(Factory):
+    """ """
+    protocol = IPCServerProtocol
+
+
+class IPCClientProtocol(Protocol):
+    """ """
+    
+    def send(self, data):
+        """ """
+        self.transport.write("sending: %s" % data)
+
+
+class IPCClientFactory(ClientFactory):
+    """ """
+    protocol = IPCClientProtocol
+
+
+def main(server_port, client_port):
+    reactor.listenTCP(server_port, IPCServerFactory())
+    reactor.connectTCP("localhost", client_port, IPCClientFactory())
+    reactor.run()
+
+if __name__ == '__main__':
+    args = sys.argv
+    if len(args) < 3:
+        server_port = 8007
+        client_port = 8008
+    else:    
+        server_port = args[1]
+        client_port = args[2]
+    main(server_port, client_port)

=== added directory 'src/ipcservice/tests'
=== added file 'src/ipcservice/tests/__init__.py'