From c30c1349db85c0cf777fc48915c6ecdfd5a8a7e4 Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Wed, 8 Jun 2011 13:11:11 +0100 Subject: bitbake/server: Add the none server back for now Signed-off-by: Richard Purdie --- lib/bb/server/none.py | 203 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 203 insertions(+) create mode 100644 lib/bb/server/none.py (limited to 'lib/bb') diff --git a/lib/bb/server/none.py b/lib/bb/server/none.py new file mode 100644 index 000000000..3be7b1daf --- /dev/null +++ b/lib/bb/server/none.py @@ -0,0 +1,203 @@ +# +# BitBake 'dummy' Passthrough 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 a passthrough server for BitBake. + + Use register_idle_function() to add a function which the server + calls from within idle_commands 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 time +import bb +import signal + +DEBUG = False + +import inspect, select + +class BitBakeServerCommands(): + def __init__(self, server): + self.server = server + + def runCommand(self, command): + """ + Run a cooker command on the server + """ + #print "Running Command %s" % command + return self.cooker.command.runCommand(command) + + def terminateServer(self): + """ + Trigger the server to quit + """ + self.server.server_exit() + #print "Server (cooker) exitting" + return + + def ping(self): + """ + Dummy method which can be used to check the server is still alive + """ + return True + +eventQueue = [] + +class BBUIEventQueue: + class event: + def __init__(self, parent): + self.parent = parent + @staticmethod + def send(event): + bb.server.none.eventQueue.append(event) + @staticmethod + def quit(): + return + + def __init__(self, BBServer): + self.eventQueue = bb.server.none.eventQueue + self.BBServer = BBServer + self.EventHandle = bb.event.register_UIHhandler(self) + + def __popEvent(self): + if len(self.eventQueue) == 0: + return None + return self.eventQueue.pop(0) + + def getEvent(self): + if len(self.eventQueue) == 0: + self.BBServer.idle_commands(0) + return self.__popEvent() + + def waitEvent(self, delay): + event = self.__popEvent() + if event: + return event + self.BBServer.idle_commands(delay) + return self.__popEvent() + + def queue_event(self, event): + self.eventQueue.append(event) + + def system_quit( self ): + bb.event.unregister_UIHhandler(self.EventHandle) + +# Dummy signal handler to ensure we break out of sleep upon SIGCHLD +def chldhandler(signum, stackframe): + pass + +class BitBakeNoneServer(): + # remove this when you're done with debugging + # allow_reuse_address = True + + def __init__(self): + self._idlefuns = {} + self.commands = BitBakeServerCommands(self) + + def addcooker(self, cooker): + self.cooker = cooker + self.commands.cooker = cooker + + def register_idle_function(self, function, data): + """Register a function to be called while the server is idle""" + assert hasattr(function, '__call__') + self._idlefuns[function] = data + + def idle_commands(self, delay): + #print "Idle queue length %s" % len(self._idlefuns) + #print "Idle timeout, running idle functions" + #if len(self._idlefuns) == 0: + nextsleep = delay + for function, data in self._idlefuns.items(): + try: + retval = function(self, data, False) + #print "Idle function returned %s" % (retval) + if retval is False: + del self._idlefuns[function] + elif retval is True: + nextsleep = None + elif nextsleep is None: + continue + elif retval < nextsleep: + nextsleep = retval + except SystemExit: + raise + except: + import traceback + traceback.print_exc() + self.commands.runCommand(["stateShutdown"]) + pass + if nextsleep is not None: + #print "Sleeping for %s (%s)" % (nextsleep, delay) + signal.signal(signal.SIGCHLD, chldhandler) + time.sleep(nextsleep) + signal.signal(signal.SIGCHLD, signal.SIG_DFL) + + def server_exit(self): + # Tell idle functions we're exiting + for function, data in self._idlefuns.items(): + try: + retval = function(self, data, True) + except: + pass + +class BitBakeServerConnection(): + def __init__(self, server): + self.server = server.server + self.connection = self.server.commands + self.events = bb.server.none.BBUIEventQueue(self.server) + for event in bb.event.ui_queue: + self.events.queue_event(event) + + def terminate(self): + try: + self.events.system_quit() + except: + pass + try: + self.connection.terminateServer() + except: + pass + +class BitBakeServer(object): + def initServer(self): + self.server = BitBakeNoneServer() + + def addcooker(self, cooker): + self.cooker = cooker + self.server.addcooker(cooker) + + def getServerIdleCB(self): + return self.server.register_idle_function + + def saveConnectionDetails(self): + return + + def detach(self, cooker_logfile): + self.logfile = cooker_logfile + + def establishConnection(self): + self.connection = BitBakeServerConnection(self) + return self.connection + + def launchUI(self, uifunc, *args): + return bb.cooker.server_main(self.cooker, uifunc, *args) + -- cgit 1.2.3-korg