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# *******************************************************************************
# * Copyright (c) 2011 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
# *******************************************************************************
"""
TCF - Target Communication Framework
"""
import types
import protocol, peer, channel
from util import task
__all__ = ('connect')
def connect(params, wait=True):
"""Connect to peer. Argument is a string of the form <transport>:<host>:<port>,
e.g. "TCP:127.0.0.1:1534" """
if type(params) is types.StringType:
params = _parse_params(params)
elif type(params) is not types.DictType:
raise TypeError("Expected string or dict")
p = peer.TransientPeer(params)
if wait:
c = task.Task(_openChannel, p).get()
else:
c = protocol.invokeAndWait(p.openChannel)
return c
def peers():
"Return list of discovered remote peers"
locator = protocol.getLocator()
if locator:
return protocol.invokeAndWait(locator.getPeers)
def _openChannel(p, done=None):
assert protocol.isDispatchThread()
c = p.openChannel()
if done is None: return
class ChannelListener(channel.ChannelListener):
def onChannelOpened(self):
c.removeChannelListener(self)
done(None, c)
def onChannelClosed(self, error):
done(error, None)
c.addChannelListener(ChannelListener())
def _parse_params(paramStr):
args = paramStr.split(":")
if len(args) != 3:
raise ValueError("Expected format: <transport>:<host>:<port>")
transp, host, port = args
return {
peer.ATTR_IP_HOST : host,
peer.ATTR_IP_PORT : port,
peer.ATTR_TRANSPORT_NAME : transp
}
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