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#!/usr/bin/env python
# encoding: utf8
#
# Copyright © Burak Arslan <burak at arskom dot com dot tr>,
# Arskom Ltd. http://www.arskom.com.tr
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of the owner nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
import logging
logging.basicConfig(level=logging.DEBUG)
logging.getLogger('spyne.protocol.xml').setLevel(logging.DEBUG)
logging.getLogger('sqlalchemy.engine.base.Engine').setLevel(logging.DEBUG)
import pytz
from spyne import Application, rpc, Mandatory as M, Unicode, Array, Iterable, \
UnsignedInteger32, TTableModel, Service, ResourceNotFoundError, \
ComplexModel, UnsignedInteger8
from spyne.protocol.http import HttpRpc
from spyne.protocol.yaml import YamlDocument
from spyne.util import memoize
from spyne.server.wsgi import WsgiApplication
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
db = create_engine('sqlite:///:memory:')
Session = sessionmaker(bind=db)
TableModel = TTableModel()
TableModel.Attributes.sqla_metadata.bind = db
class Preferences(ComplexModel):
_type_info = [
('timezone', M(Unicode(values=pytz.all_timezones_set))),
('font_size', UnsignedInteger8(
values_dict={10: 'Small', 20: 'Medium', 30: 'Large'},
default=20,
)),
('theme', Unicode(
values={'dark', 'light'},
default='light',
)),
]
class Permission(TableModel):
__tablename__ = 'permission'
__namespace__ = 'spyne.examples.sql_crud'
__table_args__ = {"sqlite_autoincrement": True}
id = UnsignedInteger32(primary_key=True)
application = Unicode(256)
operation = Unicode(256)
class User(TableModel):
__tablename__ = 'user'
__namespace__ = 'spyne.examples.sql_crud'
__table_args__ = {"sqlite_autoincrement": True}
id = UnsignedInteger32(primary_key=True)
name = Unicode(256)
first_name = Unicode(256)
last_name = Unicode(256)
permissions = Array(Permission, store_as='table')
preferences = Preferences.store_as('jsonb')
@memoize
def TCrudService(T, T_name):
class CrudService(Service):
@rpc(M(UnsignedInteger32), _returns=T,
_in_message_name='get_%s' % T_name,
_in_variable_names={'obj_id': "%s_id" % T_name})
def get(ctx, obj_id):
return ctx.udc.session.query(T).filter_by(id=obj_id).one()
@rpc(M(T), _returns=UnsignedInteger32,
_in_message_name='put_%s' % T_name,
_in_variable_names={'obj': T_name})
def put(ctx, obj):
if obj.id is None:
ctx.udc.session.add(obj)
ctx.udc.session.flush() # so that we get the obj.id value
else:
if ctx.udc.session.query(T).get(obj.id) is None:
# this is to prevent the client from setting the primary key
# of a new object instead of the database's own primary-key
# generator.
# Instead of raising an exception, you can also choose to
# ignore the primary key set by the client by silently doing
# obj.id = None in order to have the database assign the
# primary key the traditional way.
raise ResourceNotFoundError('%s.id=%d' % (T_name, obj.id))
else:
ctx.udc.session.merge(obj)
return obj.id
@rpc(M(UnsignedInteger32),
_in_message_name='del_%s' % T_name,
_in_variable_names={'obj_id': '%s_id' % T_name})
def del_(ctx, obj_id):
count = ctx.udc.session.query(T).filter_by(id=obj_id).count()
if count == 0:
raise ResourceNotFoundError(obj_id)
ctx.udc.session.query(T).filter_by(id=obj_id).delete()
@rpc(_returns=Iterable(T), _in_message_name='get_all_%s' % T_name)
def get_all(ctx):
return ctx.udc.session.query(T)
return CrudService
class UserDefinedContext(object):
def __init__(self):
self.session = Session()
def _on_method_call(ctx):
ctx.udc = UserDefinedContext()
def _on_method_return_object(ctx):
ctx.udc.session.commit()
def _on_method_context_closed(ctx):
if ctx.udc is not None:
ctx.udc.session.close()
user_service = TCrudService(User, 'user')
application = Application(
[user_service],
tns='spyne.examples.sql_crud',
in_protocol=HttpRpc(validator='soft'),
out_protocol=YamlDocument()
)
application.event_manager.add_listener('method_call', _on_method_call)
application.event_manager.add_listener('method_return_object',
_on_method_return_object)
application.event_manager.add_listener("method_context_closed",
_on_method_context_closed)
if __name__ == '__main__':
from wsgiref.simple_server import make_server
wsgi_app = WsgiApplication(application)
server = make_server('127.0.0.1', 8000, wsgi_app)
TableModel.Attributes.sqla_metadata.create_all()
logging.info("listening to http://127.0.0.1:8000")
logging.info("wsdl is at: http://localhost:8000/?wsdl")
server.serve_forever()
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