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# *****************************************************************************
# * 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 2.0
# * which accompanies this distribution, and is available at
# * https://www.eclipse.org/legal/epl-2.0/
# *
# * Contributors:
# * Wind River Systems - initial API and implementation
# *****************************************************************************
from .. import registers
from ... import channel
from ...channel import toByteArray
from ...channel.Command import Command
class Context(registers.RegistersContext):
def __init__(self, service, props):
super(Context, self).__init__(props)
self.service = service
def getNamedValues(self):
return _toValuesArray(self._props.get(registers.PROP_VALUES))
def get(self, done):
service = self.service
done = service._makeCallback(done)
contextID = self.getID()
class GetCommand(Command):
def __init__(self):
super(GetCommand, self).__init__(service.channel, service,
"get", (contextID,))
def done(self, error, args):
val = None
if not error:
assert len(args) == 2
error = self.toError(args[0])
val = toByteArray(args[1])
done.doneGet(self.token, error, val)
return GetCommand().token
def set(self, value, done):
service = self.service
done = service._makeCallback(done)
contextID = self.getID()
binary = bytearray(value)
class SetCommand(Command):
def __init__(self):
super(SetCommand, self).__init__(service.channel, service,
"set", (contextID, binary))
def done(self, error, args):
if not error:
assert len(args) == 1
error = self.toError(args[0])
done.doneSet(self.token, error)
return SetCommand().token
def search(self, filterOn, done):
service = self.service
done = service._makeCallback(done)
contextID = self.getID()
class SearchCommand(Command):
def __init__(self):
super(SearchCommand, self).__init__(service.channel, service,
"search",
(contextID, filterOn))
def done(self, error, args):
paths = None
if not error:
assert len(args) == 2
error = self.toError(args[0])
paths = args[1]
done.doneSearch(self.token, error, paths)
return SearchCommand().token
class RegistersProxy(registers.RegistersService):
def __init__(self, channel):
self.channel = channel
self.listeners = {}
def getChildren(self, parent_context_id, done):
done = self._makeCallback(done)
service = self
class GetChildrenCommand(Command):
def __init__(self):
super(GetChildrenCommand, self).__init__(service.channel,
service,
"getChildren",
(parent_context_id,))
def done(self, error, args):
contexts = None
if not error:
assert len(args) == 2
error = self.toError(args[0])
contexts = args[1]
done.doneGetChildren(self.token, error, contexts)
return GetChildrenCommand().token
def getContext(self, contextID, done):
done = self._makeCallback(done)
service = self
class GetContextCommand(Command):
def __init__(self):
super(GetContextCommand, self).__init__(service.channel,
service, "getContext",
(contextID,))
def done(self, error, args):
ctx = None
if not error:
assert len(args) == 2
error = self.toError(args[0])
if args[1]:
ctx = Context(service, args[1])
done.doneGetContext(self.token, error, ctx)
return GetContextCommand().token
def getm(self, locs, done):
done = self._makeCallback(done)
service = self
class GetMCommand(Command):
def __init__(self):
super(GetMCommand, self).__init__(service.channel, service,
"getm", (locs,))
def done(self, error, args):
val = None
if not error:
assert len(args) == 2
error = self.toError(args[0])
val = toByteArray(args[1])
done.doneGet(self.token, error, val)
return GetMCommand().token
def setm(self, locs, value, done):
done = self._makeCallback(done)
service = self
binary = bytearray(value)
class SetMCommand(Command):
def __init__(self):
super(SetMCommand, self).__init__(service.channel, service,
"setm", (locs, binary))
def done(self, error, args):
if not error:
assert len(args) == 1
error = self.toError(args[0])
done.doneSet(self.token, error)
return SetMCommand().token
def addListener(self, listener):
l = ChannelEventListener(self, listener)
self.channel.addEventListener(self, l)
self.listeners[listener] = l
def removeListener(self, listener):
l = self.listeners.get(listener)
if l:
del self.listeners[listener]
self.channel.removeEventListener(self, l)
class NamedValueInfo(registers.NamedValue):
def __init__(self, m):
desc = m.get("Description")
name = m.get("Name")
value = toByteArray(m.get("Value"))
super(NamedValueInfo, self).__init__(value, name, desc)
def _toValuesArray(o):
if o is None:
return None
arr = []
for m in o:
arr.append(NamedValueInfo(m))
return arr
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 == "contextChanged":
self.listener.contextChanged()
elif name == "registerChanged":
assert len(args) == 1
self.listener.registerChanged(args[0])
else:
raise IOError("Registers service: unknown event: " + name)
except Exception as x:
import sys
x.tb = sys.exc_info()[2]
self.service.channel.terminate(x)
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