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#
# BitBake XMLRPC Server
#
# Copyright (C) 2006 - 2007 Michael 'Mickey' Lauer
# Copyright (C) 2006 - 2008 Richard Purdie
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
This module implements an xmlrpc server for BitBake.
Use this by deriving a class from BitBakeXMLRPCServer and then adding
methods which you want to "export" via XMLRPC. If the methods have the
prefix xmlrpc_, then registering those function will happen automatically,
if not, you need to call register_function.
Use register_idle_function() to add a function which the xmlrpc server
calls from within server_forever when no requests are pending. Make sure
that those functions are non-blocking or else you will introduce latency
in the server's main loop.
"""
import bb
import xmlrpclib
DEBUG = False
from SimpleXMLRPCServer import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler
import inspect, select
class BitBakeServerCommands():
def __init__(self, server, cooker):
self.cooker = cooker
self.server = server
def registerEventHandler(self, host, port):
"""
Register a remote UI Event Handler
"""
s = xmlrpclib.Server("http://%s:%d" % (host, port), allow_none=True)
return bb.event.register_UIHhandler(s)
def unregisterEventHandler(self, handlerNum):
"""
Unregister a remote UI Event Handler
"""
return bb.event.unregister_UIHhandler(handlerNum)
def runCommand(self, command):
"""
Run a cooker command on the server
"""
return self.cooker.command.runCommand(command)
def terminateServer(self):
"""
Trigger the server to quit
"""
self.server.quit = True
print "Server (cooker) exitting"
return
def ping(self):
"""
Dummy method which can be used to check the server is still alive
"""
return True
class BitBakeXMLRPCServer(SimpleXMLRPCServer):
# remove this when you're done with debugging
# allow_reuse_address = True
def __init__(self, cooker, interface = ("localhost", 0)):
"""
Constructor
"""
SimpleXMLRPCServer.__init__(self, interface,
requestHandler=SimpleXMLRPCRequestHandler,
logRequests=False, allow_none=True)
self._idlefuns = {}
self.host, self.port = self.socket.getsockname()
#self.register_introspection_functions()
commands = BitBakeServerCommands(self, cooker)
self.autoregister_all_functions(commands, "")
def autoregister_all_functions(self, context, prefix):
"""
Convenience method for registering all functions in the scope
of this class that start with a common prefix
"""
methodlist = inspect.getmembers(context, inspect.ismethod)
for name, method in methodlist:
if name.startswith(prefix):
self.register_function(method, name[len(prefix):])
def register_idle_function(self, function, data):
"""Register a function to be called while the server is idle"""
assert callable(function)
self._idlefuns[function] = data
def serve_forever(self):
"""
Serve Requests. Overloaded to honor a quit command
"""
self.quit = False
while not self.quit:
self.handle_request()
# Tell idle functions we're exiting
for function, data in self._idlefuns.items():
try:
retval = function(self, data, True)
except:
pass
self.server_close()
return
def get_request(self):
"""
Get next request. Behaves like the parent class unless a waitpid callback
has been set. In that case, we regularly check waitpid when the server is idle
"""
while True:
# wait 500 ms for an xmlrpc request
if DEBUG:
print "DEBUG: select'ing 500ms waiting for an xmlrpc request..."
ifds, ofds, xfds = select.select([self.socket.fileno()], [], [], 0.5)
if ifds:
return self.socket.accept()
# call idle functions only if we're not shutting down atm to prevent a recursion
if not self.quit:
if DEBUG:
print "DEBUG: server is idle -- calling idle functions..."
for function, data in self._idlefuns.items():
try:
retval = function(self, data, False)
if not retval:
del self._idlefuns[function]
except SystemExit:
raise
except:
import traceback
traceback.print_exc()
pass
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