3 files changed, 684 insertions, 0 deletions

diff --git a/bitbake/lib/bb/server/__init__.py b/bitbake/lib/bb/server/__init__.py
new file mode 100644
index 0000000000..da5e480740
--- /dev/null
+++ b/bitbake/lib/bb/server/__init__.py
@@ -0,0 +1,96 @@
+#
+# BitBake Base Server Code
+#
+# Copyright (C) 2006 - 2007  Michael 'Mickey' Lauer
+# Copyright (C) 2006 - 2008  Richard Purdie
+# Copyright (C) 2013         Alexandru Damian
+#
+# 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.
+
+""" Base code for Bitbake server process
+
+Have a common base for that all Bitbake server classes ensures a consistent
+approach to the interface, and minimize risks associated with code duplication.
+
+"""
+
+"""  BaseImplServer() the base class for all XXServer() implementations.
+
+    These classes contain the actual code that runs the server side, i.e.
+    listens for the commands and executes them. Although these implementations
+    contain all the data of the original bitbake command, i.e the cooker instance,
+    they may well run on a different process or even machine.
+
+"""
+
+class BaseImplServer():
+    def __init__(self):
+        self._idlefuns = {}
+
+    def addcooker(self, cooker):
+        self.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
+
+
+
+""" BitBakeBaseServerConnection class is the common ancestor to all
+    BitBakeServerConnection classes.
+
+    These classes control the remote server. The only command currently
+    implemented is the terminate() command.
+
+"""
+
+class BitBakeBaseServerConnection():
+    def __init__(self, serverImpl):
+        pass
+
+    def terminate(self):
+        pass
+
+
+""" BitBakeBaseServer class is the common ancestor to all Bitbake servers
+
+    Derive this class in order to implement a BitBakeServer which is the
+    controlling stub for the actual server implementation
+
+"""
+class BitBakeBaseServer(object):
+    def initServer(self):
+        self.serverImpl = None  # we ensure a runtime crash if not overloaded
+        self.connection = None
+        return
+
+    def addcooker(self, cooker):
+        self.cooker = cooker
+        self.serverImpl.addcooker(cooker)
+
+    def getServerIdleCB(self):
+        return self.serverImpl.register_idle_function
+
+    def saveConnectionDetails(self):
+        return
+
+    def detach(self):
+        return
+
+    def establishConnection(self, featureset):
+        raise   "Must redefine the %s.establishConnection()" % self.__class__.__name__
+
+    def endSession(self):
+        self.connection.terminate()
diff --git a/bitbake/lib/bb/server/process.py b/bitbake/lib/bb/server/process.py
new file mode 100644
index 0000000000..aa072020af
--- /dev/null
+++ b/bitbake/lib/bb/server/process.py
@@ -0,0 +1,223 @@
+#
+# BitBake Process based server.
+#
+# Copyright (C) 2010 Bob Foerster <robert@erafx.com>
+#
+# 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 multiprocessing.Process based server for bitbake.
+"""
+
+import bb
+import bb.event
+import itertools
+import logging
+import multiprocessing
+import os
+import signal
+import sys
+import time
+import select
+from Queue import Empty
+from multiprocessing import Event, Process, util, Queue, Pipe, queues, Manager
+
+from . import BitBakeBaseServer, BitBakeBaseServerConnection, BaseImplServer
+
+logger = logging.getLogger('BitBake')
+
+class ServerCommunicator():
+    def __init__(self, connection, event_handle):
+        self.connection = connection
+        self.event_handle = event_handle
+
+    def runCommand(self, command):
+        # @todo try/except
+        self.connection.send(command)
+
+        while True:
+            # don't let the user ctrl-c while we're waiting for a response
+            try:
+                if self.connection.poll(20):
+                    return self.connection.recv()
+                else:
+                    bb.fatal("Timeout while attempting to communicate with bitbake server")
+            except KeyboardInterrupt:
+                pass
+
+    def getEventHandle(self):
+        return self.event_handle.value
+
+class EventAdapter():
+    """
+    Adapter to wrap our event queue since the caller (bb.event) expects to
+    call a send() method, but our actual queue only has put()
+    """
+    def __init__(self, queue):
+        self.queue = queue
+
+    def send(self, event):
+        try:
+            self.queue.put(event)
+        except Exception as err:
+            print("EventAdapter puked: %s" % str(err))
+
+
+class ProcessServer(Process, BaseImplServer):
+    profile_filename = "profile.log"
+    profile_processed_filename = "profile.log.processed"
+
+    def __init__(self, command_channel, event_queue, featurelist):
+        BaseImplServer.__init__(self)
+        Process.__init__(self, args=(featurelist))
+        self.command_channel = command_channel
+        self.event_queue = event_queue
+        self.event = EventAdapter(event_queue)
+        self.featurelist = featurelist
+        self.quit = False
+
+        self.keep_running = Event()
+        self.keep_running.set()
+        self.event_handle = multiprocessing.Value("i")
+
+    def run(self):
+        for event in bb.event.ui_queue:
+            self.event_queue.put(event)
+        self.event_handle.value = bb.event.register_UIHhandler(self)
+
+        # process any feature changes based on what UI requested
+        original_featureset = list(self.cooker.featureset)
+        while len(self.featurelist)> 0:
+            self.cooker.featureset.setFeature(self.featurelist.pop())
+        if (original_featureset != list(self.cooker.featureset)):
+            self.cooker.reset()
+
+        bb.cooker.server_main(self.cooker, self.main)
+
+    def main(self):
+        # Ignore SIGINT within the server, as all SIGINT handling is done by
+        # the UI and communicated to us
+        signal.signal(signal.SIGINT, signal.SIG_IGN)
+        while self.keep_running.is_set():
+            try:
+                if self.command_channel.poll():
+                    command = self.command_channel.recv()
+                    self.runCommand(command)
+
+                self.idle_commands(.1, [self.event_queue._reader, self.command_channel])
+            except Exception:
+                logger.exception('Running command %s', command)
+
+        self.event_queue.close()
+        bb.event.unregister_UIHhandler(self.event_handle.value)
+        self.command_channel.close()
+        self.cooker.shutdown(True)
+        self.idle_commands(.1)
+
+    def idle_commands(self, delay, fds = []):
+        nextsleep = delay
+
+        for function, data in self._idlefuns.items():
+            try:
+                retval = function(self, data, False)
+                if retval is False:
+                    del self._idlefuns[function]
+                elif retval is True:
+                    nextsleep = None
+                elif nextsleep is None:
+                    continue
+                else:
+                    fds = fds + retval
+            except SystemExit:
+                raise
+            except Exception:
+                logger.exception('Running idle function')
+
+        if nextsleep is not None:
+            select.select(fds,[],[],nextsleep)
+
+    def runCommand(self, command):
+        """
+        Run a cooker command on the server
+        """
+        self.command_channel.send(self.cooker.command.runCommand(command))
+
+    def stop(self):
+        self.keep_running.clear()
+
+class BitBakeProcessServerConnection(BitBakeBaseServerConnection):
+    def __init__(self, serverImpl, ui_channel, event_queue):
+        self.procserver = serverImpl
+        self.ui_channel = ui_channel
+        self.event_queue = event_queue
+        self.connection = ServerCommunicator(self.ui_channel, self.procserver.event_handle)
+        self.events = self.event_queue
+
+    def terminate(self):
+        def flushevents():
+            while True:
+                try:
+                    event = self.event_queue.get(block=False)
+                except (Empty, IOError):
+                    break
+                if isinstance(event, logging.LogRecord):
+                    logger.handle(event)
+
+        signal.signal(signal.SIGINT, signal.SIG_IGN)
+        self.procserver.stop()
+
+        while self.procserver.is_alive():
+            flushevents()
+            self.procserver.join(0.1)
+
+        self.ui_channel.close()
+        self.event_queue.close()
+
+# Wrap Queue to provide API which isn't server implementation specific
+class ProcessEventQueue(multiprocessing.queues.Queue):
+    def waitEvent(self, timeout):
+        try:
+            return self.get(True, timeout)
+        except Empty:
+            return None
+
+    def getEvent(self):
+        try:
+            return self.get(False)
+        except Empty:
+            return None
+
+
+class BitBakeServer(BitBakeBaseServer):
+    def initServer(self):
+        # establish communication channels.  We use bidirectional pipes for
+        # ui <--> server command/response pairs
+        # and a queue for server -> ui event notifications
+        #
+        self.ui_channel, self.server_channel = Pipe()
+        self.event_queue = ProcessEventQueue(0)
+        manager = Manager()
+        self.featurelist = manager.list()
+        self.serverImpl = ProcessServer(self.server_channel, self.event_queue, self.featurelist)
+
+    def detach(self):
+        self.serverImpl.start()
+        return
+
+    def establishConnection(self, featureset):
+        for f in featureset:
+            self.featurelist.append(f)
+        self.connection = BitBakeProcessServerConnection(self.serverImpl, self.ui_channel, self.event_queue)
+        signal.signal(signal.SIGTERM, lambda i, s: self.connection.terminate())
+        return self.connection
diff --git a/bitbake/lib/bb/server/xmlrpc.py b/bitbake/lib/bb/server/xmlrpc.py
new file mode 100644
index 0000000000..82c0e8d8a6
--- /dev/null
+++ b/bitbake/lib/bb/server/xmlrpc.py
@@ -0,0 +1,365 @@
+#
+# 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, sys
+from bb import daemonize
+from bb.ui import uievent
+import hashlib, time
+import socket
+import os, signal
+import threading
+try:
+    import cPickle as pickle
+except ImportError:
+    import pickle
+
+DEBUG = False
+
+from SimpleXMLRPCServer import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler
+import inspect, select, httplib
+
+from . import BitBakeBaseServer, BitBakeBaseServerConnection, BaseImplServer
+
+class BBTransport(xmlrpclib.Transport):
+    def __init__(self, timeout):
+        self.timeout = timeout
+        self.connection_token = None
+        xmlrpclib.Transport.__init__(self)
+
+    # Modified from default to pass timeout to HTTPConnection
+    def make_connection(self, host):
+        #return an existing connection if possible.  This allows
+        #HTTP/1.1 keep-alive.
+        if self._connection and host == self._connection[0]:
+            return self._connection[1]
+
+        # create a HTTP connection object from a host descriptor
+        chost, self._extra_headers, x509 = self.get_host_info(host)
+        #store the host argument along with the connection object
+        self._connection = host, httplib.HTTPConnection(chost, timeout=self.timeout)
+        return self._connection[1]
+
+    def set_connection_token(self, token):
+        self.connection_token = token
+
+    def send_content(self, h, body):
+        if self.connection_token:
+            h.putheader("Bitbake-token", self.connection_token)
+        xmlrpclib.Transport.send_content(self, h, body)
+
+def _create_server(host, port, timeout = 60):
+    t = BBTransport(timeout)
+    s = xmlrpclib.Server("http://%s:%d/" % (host, port), transport=t, allow_none=True)
+    return s, t
+
+class BitBakeServerCommands():
+
+    def __init__(self, server):
+        self.server = server
+        self.has_client = False
+
+    def registerEventHandler(self, host, port, featureset = []):
+        """
+        Register a remote UI Event Handler
+        """
+        s, t = _create_server(host, port)
+
+        # we don't allow connections if the cooker is running
+        if (self.cooker.state in [bb.cooker.state.parsing, bb.cooker.state.running]):
+            return None
+
+        original_featureset = list(self.cooker.featureset)
+        for f in featureset:
+            self.cooker.featureset.setFeature(f)
+
+        if (original_featureset != list(self.cooker.featureset)):
+            self.cooker.reset()
+
+        self.event_handle = bb.event.register_UIHhandler(s)
+        return self.event_handle
+
+    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, self.server.readonly)
+
+    def getEventHandle(self):
+        return self.event_handle
+
+    def terminateServer(self):
+        """
+        Trigger the server to quit
+        """
+        self.server.quit = True
+        print("Server (cooker) exiting")
+        return
+
+    def addClient(self):
+        if self.has_client:
+            return None
+        token = hashlib.md5(str(time.time())).hexdigest()
+        self.server.set_connection_token(token)
+        self.has_client = True
+        return token
+
+    def removeClient(self):
+        if self.has_client:
+            self.server.set_connection_token(None)
+            self.has_client = False
+            if self.server.single_use:
+                self.server.quit = True
+
+# This request handler checks if the request has a "Bitbake-token" header
+# field (this comes from the client side) and compares it with its internal
+# "Bitbake-token" field (this comes from the server). If the two are not
+# equal, it is assumed that a client is trying to connect to the server
+# while another client is connected to the server. In this case, a 503 error
+# ("service unavailable") is returned to the client.
+class BitBakeXMLRPCRequestHandler(SimpleXMLRPCRequestHandler):
+    def __init__(self, request, client_address, server):
+        self.server = server
+        SimpleXMLRPCRequestHandler.__init__(self, request, client_address, server)
+
+    def do_POST(self):
+        try:
+            remote_token = self.headers["Bitbake-token"]
+        except:
+            remote_token = None
+        if remote_token != self.server.connection_token and remote_token != "observer":
+            self.report_503()
+        else:
+            if remote_token == "observer":
+                self.server.readonly = True
+            else:
+                self.server.readonly = False
+            SimpleXMLRPCRequestHandler.do_POST(self)
+
+    def report_503(self):
+        self.send_response(503)
+        response = 'No more client allowed'
+        self.send_header("Content-type", "text/plain")
+        self.send_header("Content-length", str(len(response)))
+        self.end_headers()
+        self.wfile.write(response)
+
+
+class XMLRPCProxyServer(BaseImplServer):
+    """ not a real working server, but a stub for a proxy server connection
+
+    """
+    def __init__(self, host, port):
+        self.host = host
+        self.port = port
+
+class XMLRPCServer(SimpleXMLRPCServer, BaseImplServer):
+    # remove this when you're done with debugging
+    # allow_reuse_address = True
+
+    def __init__(self, interface):
+        """
+        Constructor
+        """
+        BaseImplServer.__init__(self)
+        SimpleXMLRPCServer.__init__(self, interface,
+                                    requestHandler=BitBakeXMLRPCRequestHandler,
+                                    logRequests=False, allow_none=True)
+        self.host, self.port = self.socket.getsockname()
+        self.connection_token = None
+        #self.register_introspection_functions()
+        self.commands = BitBakeServerCommands(self)
+        self.autoregister_all_functions(self.commands, "")
+        self.interface = interface
+        self.single_use = False
+        if (interface[1] == 0):     # anonymous port, not getting reused
+            self.single_use = True
+
+    def addcooker(self, cooker):
+        BaseImplServer.addcooker(self, cooker)
+        self.commands.cooker = cooker
+
+    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 serve_forever(self):
+        # Start the actual XMLRPC server
+        bb.cooker.server_main(self.cooker, self._serve_forever)
+
+    def _serve_forever(self):
+        """
+        Serve Requests. Overloaded to honor a quit command
+        """
+        self.quit = False
+        while not self.quit:
+            fds = [self]
+            nextsleep = 0.1
+            for function, data in self._idlefuns.items():
+                try:
+                    retval = function(self, data, False)
+                    if retval is False:
+                        del self._idlefuns[function]
+                    elif retval is True:
+                        nextsleep = 0
+                    else:
+                        fds = fds + retval
+                except SystemExit:
+                    raise
+                except:
+                    import traceback
+                    traceback.print_exc()
+                    pass
+
+            socktimeout = self.socket.gettimeout() or nextsleep
+            socktimeout = min(socktimeout, nextsleep)
+            # Mirror what BaseServer handle_request would do
+            fd_sets = select.select(fds, [], [], socktimeout)
+            if fd_sets[0] and self in fd_sets[0]:
+                self._handle_request_noblock()
+
+        # 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 set_connection_token(self, token):
+        self.connection_token = token
+
+class BitBakeXMLRPCServerConnection(BitBakeBaseServerConnection):
+    def __init__(self, serverImpl, clientinfo=("localhost", 0), observer_only = False, featureset = []):
+        self.connection, self.transport = _create_server(serverImpl.host, serverImpl.port)
+        self.clientinfo = clientinfo
+        self.serverImpl = serverImpl
+        self.observer_only = observer_only
+        self.featureset = featureset
+
+    def connect(self):
+        if not self.observer_only:
+            token = self.connection.addClient()
+        else:
+            token = "observer"
+        if token is None:
+            return None
+        self.transport.set_connection_token(token)
+
+        self.events = uievent.BBUIEventQueue(self.connection, self.clientinfo, self.featureset)
+        for event in bb.event.ui_queue:
+            self.events.queue_event(event)
+        return self
+
+    def removeClient(self):
+        if not self.observer_only:
+            self.connection.removeClient()
+
+    def terminate(self):
+        # Don't wait for server indefinitely
+        import socket
+        socket.setdefaulttimeout(2)
+        try:
+            self.events.system_quit()
+        except:
+            pass
+        try:
+            self.connection.removeClient()
+        except:
+            pass
+
+class BitBakeServer(BitBakeBaseServer):
+    def initServer(self, interface = ("localhost", 0)):
+        self.interface = interface
+        self.serverImpl = XMLRPCServer(interface)
+
+    def detach(self):
+        daemonize.createDaemon(self.serverImpl.serve_forever, "bitbake-cookerdaemon.log")
+        del self.cooker
+
+    def establishConnection(self, featureset):
+        self.connection = BitBakeXMLRPCServerConnection(self.serverImpl, self.interface, False, featureset)
+        return self.connection.connect()
+
+    def set_connection_token(self, token):
+        self.connection.transport.set_connection_token(token)
+
+class BitBakeXMLRPCClient(BitBakeBaseServer):
+
+    def __init__(self, observer_only = False):
+        self.observer_only = observer_only
+        # if we need extra caches, just tell the server to load them all
+        pass
+
+    def saveConnectionDetails(self, remote):
+        self.remote = remote
+
+    def establishConnection(self, featureset):
+        # The format of "remote" must be "server:port"
+        try:
+            [host, port] = self.remote.split(":")
+            port = int(port)
+        except:
+            return None
+        # We need our IP for the server connection. We get the IP
+        # by trying to connect with the server
+        try:
+            s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+            s.connect((host, port))
+            ip = s.getsockname()[0]
+            s.close()
+        except:
+            return None
+        try:
+            self.serverImpl = XMLRPCProxyServer(host, port)
+            self.connection = BitBakeXMLRPCServerConnection(self.serverImpl, (ip, 0), self.observer_only, featureset)
+            return self.connection.connect()
+        except Exception as e:
+            bb.fatal("Could not connect to server at %s:%s (%s)" % (host, port, str(e)))
+
+    def endSession(self):
+        self.connection.removeClient()