##// END OF EJS Templates
Fix race condition in javascript kernel message processing...
Fix race condition in javascript kernel message processing Because the binary messages are now deserialized using the asynchronous FileReader API, we need to have some way to force the messages to still be processed in the order they are received. This patch implements a simple processing queue using promises.

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r19571:4aa90a90
r20441:834cd9c4
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manager.py
99 lines | 2.6 KiB | text/x-python | PythonLexer
Bussonnier Matthias
generalise manager
r19540 """Manager to read and modify config data in JSON files.
"""
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import errno
import io
import json
import os
from IPython.config import LoggingConfigurable
from IPython.utils.path import locate_profile
from IPython.utils.py3compat import PY3
from IPython.utils.traitlets import Unicode
def recursive_update(target, new):
"""Recursively update one dictionary using another.
None values will delete their keys.
"""
for k, v in new.items():
if isinstance(v, dict):
if k not in target:
target[k] = {}
recursive_update(target[k], v)
if not target[k]:
# Prune empty subdicts
del target[k]
elif v is None:
target.pop(k, None)
else:
target[k] = v
Matthias Bussonnier
s/Json/JSON/g **/*.py
r19571 class BaseJSONConfigManager(LoggingConfigurable):
Bussonnier Matthias
generalise manager
r19540 """General config manager
Deals with persisting/storing config in a json file
in IPython profile
"""
profile_dir = Unicode()
def _profile_dir_default(self):
return locate_profile()
@property
def config_dir(self):
return self._config_dir()
def _config_dir(self):
return self.profile_dir
def ensure_config_dir_exists(self):
try:
os.mkdir(self.config_dir, 0o755)
except OSError as e:
if e.errno != errno.EEXIST:
raise
def file_name(self, section_name):
return os.path.join(self.config_dir, section_name+'.json')
def get(self, section_name):
"""Retrieve the config data for the specified section.
Returns the data as a dictionary, or an empty dictionary if the file
doesn't exist.
"""
filename = self.file_name(section_name)
if os.path.isfile(filename):
with io.open(filename, encoding='utf-8') as f:
return json.load(f)
else:
return {}
def set(self, section_name, data):
"""Store the given config data.
"""
filename = self.file_name(section_name)
self.ensure_config_dir_exists()
if PY3:
f = io.open(filename, 'w', encoding='utf-8')
else:
f = open(filename, 'wb')
with f:
json.dump(data, f)
def update(self, section_name, new_data):
"""Modify the config section by recursively updating it with new_data.
Returns the modified config data as a dictionary.
"""
data = self.get(section_name)
recursive_update(data, new_data)
self.set(section_name, data)
return data