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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
# *****************************************************************************
# * Copyright (c) 2011, 2013-2014 Wind River Systems, Inc. and others.
# * All rights reserved. This program and the accompanying materials
# * are made available under the terms of the Eclipse Public License v1.0
# * which accompanies this distribution, and is available at
# * http://www.eclipse.org/legal/epl-v10.html
# *
# * Contributors:
# * Wind River Systems - initial API and implementation
# *****************************************************************************
from .. import streams
from ... import channel
from ...channel.Command import Command
class StreamsProxy(streams.StreamsService):
def __init__(self, channel):
self.channel = channel
self.listeners = {}
def connect(self, stream_id, done):
done = self._makeCallback(done)
service = self
class ConnectCommand(Command):
def __init__(self):
super(ConnectCommand, self).__init__(service.channel, service,
"connect", (stream_id,))
def done(self, error, args):
if not error:
assert len(args) == 1
error = self.toError(args[0])
done.doneConnect(self.token, error)
return ConnectCommand().token
def disconnect(self, stream_id, done):
done = self._makeCallback(done)
service = self
class DisconnectCommand(Command):
def __init__(self):
super(DisconnectCommand, self).__init__(service.channel,
service, "disconnect",
(stream_id,))
def done(self, error, args):
if not error:
assert len(args) == 1
error = self.toError(args[0])
done.doneDisconnect(self.token, error)
return DisconnectCommand().token
def eos(self, stream_id, done):
done = self._makeCallback(done)
service = self
class EOSCommand(Command):
def __init__(self):
super(EOSCommand, self).__init__(service.channel, service,
"eos", (stream_id,))
def done(self, error, args):
if not error:
assert len(args) == 1
error = self.toError(args[0])
done.doneEOS(self.token, error)
return EOSCommand().token
def read(self, stream_id, size, done):
done = self._makeCallback(done)
service = self
class ReadCommand(Command):
def __init__(self):
super(ReadCommand, self).__init__(service.channel, service,
"read", (stream_id, size))
def done(self, error, args):
lost_size = 0
data = None
eos = False
if not error:
assert len(args) == 4
data = channel.toByteArray(args[0])
error = self.toError(args[1])
lost_size = args[2]
eos = args[3]
done.doneRead(self.token, error, lost_size, data, eos)
return ReadCommand().token
def subscribe(self, stream_type, listener, done):
done = self._makeCallback(done)
service = self
class SubscribeCommand(Command):
def __init__(self):
super(SubscribeCommand, self).__init__(service.channel,
service, "subscribe",
(stream_type,))
def done(self, error, args):
if not error:
assert len(args) == 1
error = self.toError(args[0])
if not error:
l = ChannelEventListener(service, listener)
service.listeners[listener] = l
service.channel.addEventListener(service, l)
done.doneSubscribe(self.token, error)
return SubscribeCommand().token
def unsubscribe(self, stream_type, listener, done):
done = self._makeCallback(done)
service = self
class UnsubscribeCommand(Command):
def __init__(self):
super(UnsubscribeCommand, self).__init__(service.channel,
service,
"unsubscribe",
(stream_type,))
def done(self, error, args):
if not error:
assert len(args) == 1
error = self.toError(args[0])
if not error:
l = service.listeners.pop(listener, None)
if l:
service.channel.removeEventListener(service, l)
done.doneUnsubscribe(self.token, error)
return UnsubscribeCommand().token
def write(self, stream_id, buf, offset, size, done):
done = self._makeCallback(done)
service = self
binary = buf[offset:offset + size]
class WriteCommand(Command):
def __init__(self):
super(WriteCommand, self).__init__(service.channel, service,
"write",
(stream_id, size, binary,))
def done(self, error, args):
if not error:
assert len(args) == 1
error = self.toError(args[0])
done.doneWrite(self.token, error)
return WriteCommand().token
class ChannelEventListener(channel.EventListener):
def __init__(self, service, listener):
self.service = service
self.listener = listener
def event(self, name, data):
try:
args = channel.fromJSONSequence(data)
if name == "created":
if len(args) == 3:
self.listener.created(args[0], args[1], args[2])
else:
assert len(args) == 2
self.listener.created(args[0], args[1], None)
elif name == "disposed":
assert len(args) == 2
self.listener.disposed(args[0], args[1])
else:
raise IOError("Streams service: unknown event: " + name)
except Exception as x:
import sys
x.tb = sys.exc_info()[2]
self.service.channel.terminate(x)
|
