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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
import connection010
import session
from util import notify
from datatypes import RangedSet
class Delegate:
def __init__(self, connection, delegate=session.client):
self.connection = connection
self.spec = connection.spec
self.delegate = delegate
self.control = self.spec["track.control"].value
def received(self, seg):
ssn = self.connection.attached.get(seg.channel)
if ssn is None:
ch = connection010.Channel(self.connection, seg.channel)
else:
ch = ssn.channel
if seg.track == self.control:
cntrl = seg.decode(self.spec)
attr = cntrl.type.qname.replace(".", "_")
getattr(self, attr)(ch, cntrl)
elif ssn is None:
ch.session_detached()
else:
ssn.received(seg)
def connection_close(self, ch, close):
ch.connection_close_ok()
self.connection.sock.close()
def connection_close_ok(self, ch, close_ok):
self.connection.opened = False
notify(self.connection.condition)
def session_attach(self, ch, a):
try:
self.connection.attach(a.name, ch, self.delegate, a.force)
ch.session_attached(a.name)
except connection010.ChannelBusy:
ch.session_detached(a.name)
except connection010.SessionBusy:
ch.session_detached(a.name)
def session_attached(self, ch, a):
notify(ch.session.condition)
def session_detach(self, ch, d):
self.connection.detach(d.name, ch)
ch.session_detached(d.name)
def session_detached(self, ch, d):
ssn = self.connection.detach(d.name, ch)
if ssn is not None:
notify(ch.session.condition)
def session_command_point(self, ch, cp):
ssn = ch.session
ssn.receiver.next_id = cp.command_id
ssn.receiver.next_offset = cp.command_offset
def session_completed(self, ch, cmp):
ch.session.sender.completed(cmp.commands)
notify(ch.session.condition)
def session_flush(self, ch, f):
rcv = ch.session.receiver
if f.expected:
if rcv.next_id == None:
exp = None
else:
exp = RangedSet(rcv.next_id)
ch.session_expected(exp)
if f.confirmed:
ch.session_confirmed(rcv._completed)
if f.completed:
ch.session_completed(rcv._completed)
class Server(Delegate):
def start(self):
self.connection.read_header()
self.connection.write_header(self.spec.major, self.spec.minor)
connection010.Channel(self.connection, 0).connection_start()
def connection_start_ok(self, ch, start_ok):
ch.connection_tune()
def connection_tune_ok(self, ch, tune_ok):
pass
def connection_open(self, ch, open):
self.connection.opened = True
ch.connection_open_ok()
notify(self.connection.condition)
class Client(Delegate):
def start(self):
self.connection.write_header(self.spec.major, self.spec.minor)
self.connection.read_header()
def connection_start(self, ch, start):
ch.connection_start_ok()
def connection_tune(self, ch, tune):
ch.connection_tune_ok()
ch.connection_open()
def connection_open_ok(self, ch, open_ok):
self.connection.opened = True
notify(self.connection.condition)
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