1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# Copyright (C) 2006 - 2007 Michael 'Mickey' Lauer
# Copyright (C) 2006 - 2007 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.
"""
Use this class to fork off a thread to recieve event callbacks from the bitbake
server and queue them for the UI to process. This process must be used to avoid
client/server deadlocks.
"""
import socket, threading, pickle
from SimpleXMLRPCServer import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler
class BBUIEventQueue:
def __init__(self, BBServer, clientinfo=("localhost, 0")):
self.eventQueue = []
self.eventQueueLock = threading.Lock()
self.eventQueueNotify = threading.Event()
self.BBServer = BBServer
self.clientinfo = clientinfo
server = UIXMLRPCServer(self.clientinfo)
self.host, self.port = server.socket.getsockname()
server.register_function( self.system_quit, "event.quit" )
server.register_function( self.send_event, "event.sendpickle" )
server.socket.settimeout(1)
self.EventHandler = None
count_tries = 0
# the event handler registration may fail here due to cooker being in invalid state
# this is a transient situation, and we should retry a couple of times before
# giving up
while self.EventHandler == None and count_tries < 5:
self.EventHandle = self.BBServer.registerEventHandler(self.host, self.port)
if (self.EventHandle != None):
break
bb.warn("Could not register UI event handler %s:%d, retry" % (self.host, self.port))
count_tries += 1
import time
time.sleep(1)
if self.EventHandle == None:
raise Exception("Could not register UI event handler")
self.server = server
self.t = threading.Thread()
self.t.setDaemon(True)
self.t.run = self.startCallbackHandler
self.t.start()
def getEvent(self):
self.eventQueueLock.acquire()
if len(self.eventQueue) == 0:
self.eventQueueLock.release()
return None
item = self.eventQueue.pop(0)
if len(self.eventQueue) == 0:
self.eventQueueNotify.clear()
self.eventQueueLock.release()
return item
def waitEvent(self, delay):
self.eventQueueNotify.wait(delay)
return self.getEvent()
def queue_event(self, event):
self.eventQueueLock.acquire()
self.eventQueue.append(event)
self.eventQueueNotify.set()
self.eventQueueLock.release()
def send_event(self, event):
self.queue_event(pickle.loads(event))
def startCallbackHandler(self):
self.server.timeout = 1
while not self.server.quit:
self.server.handle_request()
self.server.server_close()
def system_quit( self ):
"""
Shut down the callback thread
"""
try:
self.BBServer.unregisterEventHandler(self.EventHandle)
except:
pass
self.server.quit = True
class UIXMLRPCServer (SimpleXMLRPCServer):
def __init__( self, interface ):
self.quit = False
SimpleXMLRPCServer.__init__( self,
interface,
requestHandler=SimpleXMLRPCRequestHandler,
logRequests=False, allow_none=True)
def get_request(self):
while not self.quit:
try:
sock, addr = self.socket.accept()
sock.settimeout(1)
return (sock, addr)
except socket.timeout:
pass
return (None, None)
def close_request(self, request):
if request is None:
return
SimpleXMLRPCServer.close_request(self, request)
def process_request(self, request, client_address):
if request is None:
return
SimpleXMLRPCServer.process_request(self, request, client_address)
|
