# -*- coding: utf-8 -*-

# Open Source Initiative OSI - The MIT License (MIT):Licensing

#

# The MIT License (MIT)

# Copyright (c) 2015 François-Xavier Bourlet ([email protected])

#

# Permission is hereby granted, free of charge, to any person obtaining a copy of

# this software and associated documentation files (the "Software"), to deal in

# the Software without restriction, including without limitation the rights to

# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies

# of the Software, and to permit persons to whom the Software is furnished to do

# so, subject to the following conditions:

#

# The above copyright notice and this permission notice shall be included in all

# copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

# SOFTWARE.

class ReqRep(object):

def process_call(self, context, channel, req_event, functor):

context.hook_server_before_exec(req_event)

result = functor(*req_event.args)

rep_event = channel.new_event(u'OK', (result,),

context.hook_get_task_context())

context.hook_server_after_exec(req_event, rep_event)

channel.emit_event(rep_event)

def accept_answer(self, event):

return event.name in (u'OK', u'ERR')

def process_answer(self, context, channel, req_event, rep_event,

handle_remote_error):

try:

if rep_event.name == u'ERR':

exception = handle_remote_error(rep_event)

context.hook_client_after_request(req_event, rep_event, exception)

raise exception

context.hook_client_after_request(req_event, rep_event)

return rep_event.args[0]

finally:

channel.close()

class ReqStream(object):

def process_call(self, context, channel, req_event, functor):

context.hook_server_before_exec(req_event)

xheader = context.hook_get_task_context()

for result in iter(functor(*req_event.args)):

channel.emit(u'STREAM', result, xheader)

done_event = channel.new_event(u'STREAM_DONE', None, xheader)

# NOTE: "We" made the choice to call the hook once the stream is done,

# the other choice was to call it at each iteration. I donu't think that

# one choice is better than the other, so Iu'm fine with changing this

# or adding the server_after_iteration and client_after_iteration hooks.

context.hook_server_after_exec(req_event, done_event)

channel.emit_event(done_event)

def accept_answer(self, event):

return event.name in (u'STREAM', u'STREAM_DONE')

def process_answer(self, context, channel, req_event, rep_event,

handle_remote_error):

def is_stream_done(rep_event):

return rep_event.name == u'STREAM_DONE'

channel.on_close_if = is_stream_done

def iterator(req_event, rep_event):

try:

while rep_event.name == u'STREAM':

# Like in process_call, we made the choice to call the

# after_exec hook only when the stream is done.

yield rep_event.args

rep_event = channel.recv()

if rep_event.name == u'ERR':

exception = handle_remote_error(rep_event)

context.hook_client_after_request(req_event, rep_event, exception)

raise exception

context.hook_client_after_request(req_event, rep_event)

finally:

channel.close()

return iterator(req_event, rep_event)

patterns_list = [ReqStream(), ReqRep()]