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"""
BitBake 'remotedata' module
Provides support for using a datastore from the bitbake client
"""
# Copyright (C) 2016 Intel Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import bb.data
class RemoteDatastores:
"""Used on the server side to manage references to server-side datastores"""
def __init__(self, cooker):
self.cooker = cooker
self.datastores = {}
self.locked = []
self.nextindex = 1
def __len__(self):
return len(self.datastores)
def __getitem__(self, key):
if key is None:
return self.cooker.data
else:
return self.datastores[key]
def items(self):
return self.datastores.items()
def store(self, d, locked=False):
"""
Put a datastore into the collection. If locked=True then the datastore
is understood to be managed externally and cannot be released by calling
release().
"""
idx = self.nextindex
self.datastores[idx] = d
if locked:
self.locked.append(idx)
self.nextindex += 1
return idx
def check_store(self, d, locked=False):
"""
Put a datastore into the collection if it's not already in there;
in either case return the index
"""
for key, val in self.datastores.items():
if val is d:
idx = key
break
else:
idx = self.store(d, locked)
return idx
def release(self, idx):
"""Discard a datastore in the collection"""
if idx in self.locked:
raise Exception('Tried to release locked datastore %d' % idx)
del self.datastores[idx]
def receive_datastore(self, remote_data):
"""Receive a datastore object sent from the client (as prepared by transmit_datastore())"""
dct = dict(remote_data)
d = bb.data_smart.DataSmart()
d.dict = dct
while True:
if '_remote_data' in dct:
dsindex = dct['_remote_data']['_content']
del dct['_remote_data']
if dsindex is None:
dct['_data'] = self.cooker.data.dict
else:
dct['_data'] = self.datastores[dsindex].dict
break
elif '_data' in dct:
idct = dict(dct['_data'])
dct['_data'] = idct
dct = idct
else:
break
return d
@staticmethod
def transmit_datastore(d):
"""Prepare a datastore object for sending over IPC from the client end"""
# FIXME content might be a dict, need to turn that into a list as well
def copy_dicts(dct):
if '_remote_data' in dct:
dsindex = dct['_remote_data']['_content'].dsindex
newdct = dct.copy()
newdct['_remote_data'] = {'_content': dsindex}
return list(newdct.items())
elif '_data' in dct:
newdct = dct.copy()
newdata = copy_dicts(dct['_data'])
if newdata:
newdct['_data'] = newdata
return list(newdct.items())
return None
main_dict = copy_dicts(d.dict)
return main_dict
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