diff options
Diffstat (limited to 'src/leap/bitmask/logs')
| -rw-r--r-- | src/leap/bitmask/logs/__init__.py | 6 | ||||
| -rw-r--r-- | src/leap/bitmask/logs/leap_log_handler.py | 137 | ||||
| -rw-r--r-- | src/leap/bitmask/logs/log_silencer.py | 90 | ||||
| -rw-r--r-- | src/leap/bitmask/logs/safezmqhandler.py | 131 | ||||
| -rw-r--r-- | src/leap/bitmask/logs/tests/test_leap_log_handler.py | 120 | ||||
| -rw-r--r-- | src/leap/bitmask/logs/utils.py | 255 |
6 files changed, 387 insertions, 352 deletions
diff --git a/src/leap/bitmask/logs/__init__.py b/src/leap/bitmask/logs/__init__.py index 0516b304..837a5ed9 100644 --- a/src/leap/bitmask/logs/__init__.py +++ b/src/leap/bitmask/logs/__init__.py @@ -1,3 +1,3 @@ -# levelname length == 8, since 'CRITICAL' is the longest -LOG_FORMAT = ('%(asctime)s - %(levelname)-8s - ' - 'L#%(lineno)-4s : %(name)s:%(funcName)s() - %(message)s') +LOG_FORMAT = (u'[{record.time:%Y-%m-%d %H:%M:%S}] ' + u'{record.level_name: <8} - L#{record.lineno: <4} : ' + u'{record.module}:{record.func_name} - {record.message}') diff --git a/src/leap/bitmask/logs/leap_log_handler.py b/src/leap/bitmask/logs/leap_log_handler.py deleted file mode 100644 index 24141638..00000000 --- a/src/leap/bitmask/logs/leap_log_handler.py +++ /dev/null @@ -1,137 +0,0 @@ -# -*- coding: utf-8 -*- -# leap_log_handler.py -# Copyright (C) 2013 LEAP -# -# This program is free software: you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation, either version 3 of the License, or -# (at your option) any later version. -# -# 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, see <http://www.gnu.org/licenses/>. -""" -Custom handler for the logger window. -""" -import logging - -from PySide import QtCore - -from leap.bitmask.logs import LOG_FORMAT - - -class LogHandler(logging.Handler): - """ - This is the custom handler that implements our desired formatting - and also keeps a history of all the logged events. - """ - - MESSAGE_KEY = 'message' - RECORD_KEY = 'record' - - def __init__(self, qtsignal): - """ - LogHander initialization. - Calls parent method and keeps a reference to the qtsignal - that will be used to fire the gui update. - """ - # TODO This is going to eat lots of memory after some time. - # Should be pruned at some moment. - self._log_history = [] - - logging.Handler.__init__(self) - self._qtsignal = qtsignal - - def _get_format(self, logging_level): - """ - Sets the log format depending on the parameter. - It uses html and css to set the colors for the logs. - - :param logging_level: the debug level to define the color. - :type logging_level: str. - """ - formatter = logging.Formatter(LOG_FORMAT) - return formatter - - def emit(self, logRecord): - """ - This method is fired every time that a record is logged by the - logging module. - This method reimplements logging.Handler.emit that is fired - in every logged message. - - :param logRecord: the record emitted by the logging module. - :type logRecord: logging.LogRecord. - """ - self.setFormatter(self._get_format(logRecord.levelname)) - log = self.format(logRecord) - log_item = {self.RECORD_KEY: logRecord, self.MESSAGE_KEY: log} - self._log_history.append(log_item) - self._qtsignal(log_item) - - -class HandlerAdapter(object): - """ - New style class that accesses all attributes from the LogHandler. - - Used as a workaround for a problem with multiple inheritance with Pyside - that surfaced under OSX with pyside 1.1.0. - """ - MESSAGE_KEY = 'message' - RECORD_KEY = 'record' - - def __init__(self, qtsignal): - self._handler = LogHandler(qtsignal=qtsignal) - - def setLevel(self, *args, **kwargs): - return self._handler.setLevel(*args, **kwargs) - - def addFilter(self, *args, **kwargs): - return self._handler.addFilter(*args, **kwargs) - - def handle(self, *args, **kwargs): - return self._handler.handle(*args, **kwargs) - - @property - def level(self): - return self._handler.level - - -class LeapLogHandler(QtCore.QObject, HandlerAdapter): - """ - Custom logging handler. It emits Qt signals so it can be plugged to a gui. - - Its inner handler also stores an history of logs that can be fetched after - having been connected to a gui. - """ - # All dicts returned are of the form - # {'record': LogRecord, 'message': str} - new_log = QtCore.Signal(dict) - - def __init__(self): - """ - LeapLogHandler initialization. - Initializes parent classes. - """ - QtCore.QObject.__init__(self) - HandlerAdapter.__init__(self, qtsignal=self.qtsignal) - - def qtsignal(self, log_item): - # WARNING: the new-style connection does NOT work because PySide - # translates the emit method to self.emit, and that collides with - # the emit method for logging.Handler - # self.new_log.emit(log_item) - QtCore.QObject.emit( - self, - QtCore.SIGNAL('new_log(PyObject)'), log_item) - - @property - def log_history(self): - """ - Returns the history of the logged messages. - """ - return self._handler._log_history diff --git a/src/leap/bitmask/logs/log_silencer.py b/src/leap/bitmask/logs/log_silencer.py index 56b290e4..da95e9b1 100644 --- a/src/leap/bitmask/logs/log_silencer.py +++ b/src/leap/bitmask/logs/log_silencer.py @@ -17,26 +17,32 @@ """ Filter for leap logs. """ -import logging import os -import re from leap.bitmask.util import get_path_prefix -class SelectiveSilencerFilter(logging.Filter): +class SelectiveSilencerFilter(object): """ - Configurable filter for root leap logger. + Configurable log filter for a Logbook logger. - If you want to ignore components from the logging, just add them, - one by line, to ~/.config/leap/leap.dev.conf + To include certain logs add them to: + ~/.config/leap/leap_log_inclusion.dev.conf + + To exclude certain logs add them to: + ~/.config/leap/leap_log_exclusion.dev.conf + + The log filtering is based on how the module name starts. + In case of no inclusion or exclusion files are detected the default rules + will be used. """ # TODO we can augment this by properly parsing the log-silencer file # and having different sections: ignore, levels, ... # TODO use ConfigParser to unify sections [log-ignore] [log-debug] etc - CONFIG_NAME = "leap.dev.conf" + INCLUSION_CONFIG_FILE = "leap_log_inclusion.dev.conf" + EXCLUSION_CONFIG_FILE = "leap_log_exclusion.dev.conf" # Components to be completely silenced in the main bitmask logs. # You probably should think twice before adding a component to @@ -44,38 +50,49 @@ class SelectiveSilencerFilter(logging.Filter): # only in those cases in which we gain more from silencing them than from # having their logs into the main log file that the user will likely send # to us. - SILENCER_RULES = ( + EXCLUSION_RULES = ( 'leap.common.events', 'leap.common.decorators', ) + # This tuple list the module names that we want to display, any different + # namespace will be filtered out. + INCLUSION_RULES = ( + '__main__', + 'leap.', # right now we just want to include logs from leap modules + 'twisted.', + ) + def __init__(self): """ Tries to load silencer rules from the default path, or load from the SILENCER_RULES tuple if not found. """ - self.rules = None - if os.path.isfile(self._rules_path): - self.rules = self._load_rules() - if not self.rules: - self.rules = self.SILENCER_RULES - - @property - def _rules_path(self): - """ - The configuration file for custom ignore rules. - """ - return os.path.join(get_path_prefix(), "leap", self.CONFIG_NAME) + self._inclusion_path = os.path.join(get_path_prefix(), "leap", + self.INCLUSION_CONFIG_FILE) + + self._exclusion_path = os.path.join(get_path_prefix(), "leap", + self.EXCLUSION_CONFIG_FILE) + + self._load_rules() def _load_rules(self): """ - Loads a list of paths to be ignored from the logging. + Load the inclusion and exclusion rules from the config files. """ - lines = open(self._rules_path).readlines() - return map(lambda line: re.sub('\s', '', line), - lines) + try: + with open(self._inclusion_path) as f: + self._inclusion_rules = f.read().splitlines() + except IOError: + self._inclusion_rules = self.INCLUSION_RULES - def filter(self, record): + try: + with open(self._exclusion_path) as f: + self._exclusion_rules = f.read().splitlines() + except IOError: + self._exclusion_rules = self.EXCLUSION_RULES + + def filter(self, record, handler): """ Implements the filter functionality for this Filter @@ -84,10 +101,25 @@ class SelectiveSilencerFilter(logging.Filter): :returns: a bool indicating whether the record should be logged or not. :rtype: bool """ - if not self.rules: - return True - logger_path = record.name - for path in self.rules: + if not self._inclusion_rules and not self._exclusion_rules: + return True # do not filter if there are no rules + + logger_path = record.module + if logger_path is None: + return True # we can't filter if there is no module info + + # exclude paths that ARE NOT listed in ANY of the inclusion rules + match = False + for path in self._inclusion_rules: + if logger_path.startswith(path): + match = True + + if not match: + return False + + # exclude paths that ARE listed in the exclusion rules + for path in self._exclusion_rules: if logger_path.startswith(path): return False + return True diff --git a/src/leap/bitmask/logs/safezmqhandler.py b/src/leap/bitmask/logs/safezmqhandler.py new file mode 100644 index 00000000..4f7aca9b --- /dev/null +++ b/src/leap/bitmask/logs/safezmqhandler.py @@ -0,0 +1,131 @@ +# -*- coding: utf-8 -*- +# safezmqhandler.py +# Copyright (C) 2013, 2014, 2015 LEAP +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# 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, see <http://www.gnu.org/licenses/>. +""" +A thread-safe zmq handler for LogBook. +""" +import json +import threading + +from logbook.queues import ZeroMQHandler +from logbook import NOTSET + +import zmq + + +class SafeZMQHandler(ZeroMQHandler): + """ + A ZMQ log handler for LogBook that is thread-safe. + + This log handler makes use of the existing zmq handler and if the user + tries to log something from a different thread than the one used to + create the handler a new socket is created for that thread. + + Note: In ZMQ, Contexts are threadsafe objects, but Sockets are not. + """ + + def __init__(self, uri=None, level=NOTSET, filter=None, bubble=False, + context=None, multi=False): + """ + Safe zmq handler constructor that calls the ZeroMQHandler constructor + and does some extra initializations. + """ + # The current `SafeZMQHandler` uses the `ZeroMQHandler` constructor + # which creates a socket each time. + # The purpose of the `self._sockets` attribute is to prevent cases in + # which we use the same logger in different threads. For instance when + # we (in the same file) `deferToThread` a method/function, we are using + # the same logger/socket without calling get_logger again. + # If we want to reuse the socket, we need to rewrite this constructor + # instead of calling the ZeroMQHandler's one. + # The best approach may be to inherit directly from `logbook.Handler`. + + ZeroMQHandler.__init__(self, uri, level, filter, bubble, context, + multi) + + current_id = self._get_caller_id() + # we store the socket created on the parent + self._sockets = {current_id: self.socket} + + # store the settings for new socket creation + self._multi = multi + self._uri = uri + + def _get_caller_id(self): + """ + Return an id for the caller that depends on the current thread. + Thanks to this we can detect if we are running in a thread different + than the one who created the socket and create a new one for it. + + :rtype: int + """ + # NOTE it makes no sense to use multiprocessing id since the sockets + # list can't/shouldn't be shared between processes. We only use + # thread id. The user needs to make sure that the handler is created + # inside each process. + return threading.current_thread().ident + + def _get_new_socket(self): + """ + Return a new socket using the `uri` and `multi` parameters given in the + constructor. + + :rtype: zmq.Socket + """ + socket = None + + if self._multi: + socket = self.context.socket(zmq.PUSH) + if self._uri is not None: + socket.connect(self._uri) + else: + socket = self.context.socket(zmq.PUB) + if self._uri is not None: + socket.bind(self._uri) + + return socket + + def emit(self, record): + """ + Emit the given `record` through the socket. + + :param record: the record to emit + :type record: Logbook.LogRecord + """ + current_id = self._get_caller_id() + socket = None + + if current_id in self._sockets: + socket = self._sockets[current_id] + else: + # TODO: create new socket + socket = self._get_new_socket() + self._sockets[current_id] = socket + + socket.send(json.dumps(self.export_record(record)).encode("utf-8")) + + def close(self, linger=-1): + """ + Close all the sockets and linger `linger` time. + + This reimplements the ZeroMQHandler.close method that is used by + context methods. + + :param linger: time to linger, -1 to not to. + :type linger: int + """ + for socket in self._sockets.values(): + socket.close(linger) diff --git a/src/leap/bitmask/logs/tests/test_leap_log_handler.py b/src/leap/bitmask/logs/tests/test_leap_log_handler.py deleted file mode 100644 index 20b09aef..00000000 --- a/src/leap/bitmask/logs/tests/test_leap_log_handler.py +++ /dev/null @@ -1,120 +0,0 @@ -# -*- coding: utf-8 -*- -# test_leap_log_handler.py -# Copyright (C) 2013 LEAP -# -# This program is free software: you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation, either version 3 of the License, or -# (at your option) any later version. -# -# 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, see <http://www.gnu.org/licenses/>. -""" -tests for leap_log_handler -""" -try: - import unittest2 as unittest -except ImportError: - import unittest - -import logging - -from leap.bitmask.logs.leap_log_handler import LeapLogHandler -from leap.bitmask.util.pyside_tests_helper import BasicPySlotCase -from leap.common.testing.basetest import BaseLeapTest - -from mock import Mock - - -class LeapLogHandlerTest(BaseLeapTest, BasicPySlotCase): - """ - LeapLogHandlerTest's tests. - """ - def _callback(self, *args): - """ - Simple callback to track if a signal was emitted. - """ - self.called = True - self.emitted_msg = args[0][LeapLogHandler.MESSAGE_KEY] - - def setUp(self): - BasicPySlotCase.setUp(self) - - # Create the logger - level = logging.DEBUG - self.logger = logging.getLogger(name='test') - self.logger.setLevel(level) - - # Create the handler - self.leap_handler = LeapLogHandler() - self.leap_handler.setLevel(level) - self.logger.addHandler(self.leap_handler) - - def tearDown(self): - BasicPySlotCase.tearDown(self) - try: - self.leap_handler.new_log.disconnect() - except Exception: - pass - - def test_history_starts_empty(self): - self.assertEqual(self.leap_handler.log_history, []) - - def test_one_log_captured(self): - self.logger.debug('test') - self.assertEqual(len(self.leap_handler.log_history), 1) - - def test_history_records_order(self): - self.logger.debug('test 01') - self.logger.debug('test 02') - self.logger.debug('test 03') - - logs = [] - for message in self.leap_handler.log_history: - logs.append(message[LeapLogHandler.RECORD_KEY].msg) - - self.assertIn('test 01', logs) - self.assertIn('test 02', logs) - self.assertIn('test 03', logs) - - def test_history_messages_order(self): - self.logger.debug('test 01') - self.logger.debug('test 02') - self.logger.debug('test 03') - - logs = [] - for message in self.leap_handler.log_history: - logs.append(message[LeapLogHandler.MESSAGE_KEY]) - - self.assertIn('test 01', logs[0]) - self.assertIn('test 02', logs[1]) - self.assertIn('test 03', logs[2]) - - def test_emits_signal(self): - log_format = '%(name)s - %(levelname)s - %(message)s' - formatter = logging.Formatter(log_format) - get_format = Mock(return_value=formatter) - self.leap_handler._handler._get_format = get_format - - self.leap_handler.new_log.connect(self._callback) - self.logger.debug('test') - - expected_log_msg = "test - DEBUG - test" - - # signal emitted - self.assertTrue(self.called) - - # emitted message - self.assertEqual(self.emitted_msg, expected_log_msg) - - # Mock called - self.assertTrue(get_format.called) - - -if __name__ == "__main__": - unittest.main() diff --git a/src/leap/bitmask/logs/utils.py b/src/leap/bitmask/logs/utils.py index 8367937a..683fb542 100644 --- a/src/leap/bitmask/logs/utils.py +++ b/src/leap/bitmask/logs/utils.py @@ -1,80 +1,99 @@ -import logging +# -*- coding: utf-8 -*- +# utils.py +# Copyright (C) 2013, 2014, 2015 LEAP +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# 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, see <http://www.gnu.org/licenses/>. +""" +Logs utilities +""" + +import os import sys +from leap.bitmask.config import flags from leap.bitmask.logs import LOG_FORMAT from leap.bitmask.logs.log_silencer import SelectiveSilencerFilter -from leap.bitmask.logs.leap_log_handler import LeapLogHandler -from leap.bitmask.logs.streamtologger import StreamToLogger +from leap.bitmask.logs.safezmqhandler import SafeZMQHandler +# from leap.bitmask.logs.streamtologger import StreamToLogger from leap.bitmask.platform_init import IS_WIN +from leap.bitmask.util import get_path_prefix +from leap.common.files import mkdir_p + +from PySide import QtCore + +import logbook +from logbook.more import ColorizedStderrHandler +from logbook.queues import ZeroMQSubscriber + + +# NOTE: make sure that the folder exists, the logger is created before saving +# settings on the first run. +_base = os.path.join(get_path_prefix(), "leap") +mkdir_p(_base) +BITMASK_LOG_FILE = os.path.join(_base, 'bitmask.log') -def create_logger(debug=False, logfile=None, replace_stdout=True): +def get_logger(perform_rollover=False): """ - Create the logger and attach the handlers. - - :param debug: the level of the messages that we should log - :type debug: bool - :param logfile: the file name of where we should to save the logs - :type logfile: str - :return: the new logger with the attached handlers. - :rtype: logging.Logger + Push to the app stack the needed handlers and return a Logger object. + + :rtype: logbook.Logger """ - # TODO: get severity from command line args - if debug: - level = logging.DEBUG - else: - level = logging.WARNING - - # Create logger and formatter - logger = logging.getLogger(name='leap') - logger.setLevel(level) - formatter = logging.Formatter(LOG_FORMAT) - - # Console handler - try: - import coloredlogs - console = coloredlogs.ColoredStreamHandler(level=level) - except ImportError: - console = logging.StreamHandler() - console.setLevel(level) - console.setFormatter(formatter) - using_coloredlog = False - else: - using_coloredlog = True - - if using_coloredlog: - replace_stdout = False + level = logbook.WARNING + if flags.DEBUG: + level = logbook.NOTSET + + # This handler consumes logs not handled by the others + null_handler = logbook.NullHandler(bubble=False) + null_handler.push_application() silencer = SelectiveSilencerFilter() - console.addFilter(silencer) - logger.addHandler(console) - logger.debug('Console handler plugged!') - - # LEAP custom handler - leap_handler = LeapLogHandler() - leap_handler.setLevel(level) - leap_handler.addFilter(silencer) - logger.addHandler(leap_handler) - logger.debug('Leap handler plugged!') - - # File handler - if logfile is not None: - logger.debug('Setting logfile to %s ', logfile) - fileh = logging.FileHandler(logfile) - fileh.setLevel(logging.DEBUG) - fileh.setFormatter(formatter) - fileh.addFilter(silencer) - logger.addHandler(fileh) - logger.debug('File handler plugged!') - - if replace_stdout: - replace_stdout_stderr_with_logging(logger) + + zmq_handler = SafeZMQHandler('tcp://127.0.0.1:5000', multi=True, + level=level, filter=silencer.filter) + zmq_handler.push_application() + + file_handler = logbook.RotatingFileHandler( + BITMASK_LOG_FILE, format_string=LOG_FORMAT, bubble=True, + filter=silencer.filter, max_size=sys.maxint) + + if perform_rollover: + file_handler.perform_rollover() + + file_handler.push_application() + + # don't use simple stream, go for colored log handler instead + # stream_handler = logbook.StreamHandler(sys.stdout, + # format_string=LOG_FORMAT, + # bubble=True) + # stream_handler.push_application() + stream_handler = ColorizedStderrHandler( + level=level, format_string=LOG_FORMAT, bubble=True, + filter=silencer.filter) + stream_handler.push_application() + + logger = logbook.Logger('leap') return logger -def replace_stdout_stderr_with_logging(logger): +def replace_stdout_stderr_with_logging(logger=None): """ + NOTE: + we are not using this right now (see commented lines on app.py), + this needs to be reviewed since the log handler has changed. + Replace: - the standard output - the standard error @@ -84,9 +103,119 @@ def replace_stdout_stderr_with_logging(logger): # Disabling this on windows since it breaks ALL THE THINGS # The issue for this is #4149 if not IS_WIN: - sys.stdout = StreamToLogger(logger, logging.DEBUG) - sys.stderr = StreamToLogger(logger, logging.ERROR) + # logger = get_logger() + # sys.stdout = StreamToLogger(logger, logbook.NOTSET) + # sys.stderr = StreamToLogger(logger, logging.ERROR) # Replace twisted's logger to use our custom output. from twisted.python import log log.startLogging(sys.stdout) + + +class QtLogHandler(logbook.Handler, logbook.StringFormatterHandlerMixin): + """ + Custom log handler which emits a log record with the message properly + formatted using a Qt Signal. + """ + + class _QtSignaler(QtCore.QObject): + """ + inline class used to hold the `new_log` Signal, if this is used + directly in the outside class it fails due how PySide works. + + This is the message we get if not use this method: + TypeError: Error when calling the metaclass bases + metaclass conflict: the metaclass of a derived class must be a + (non-strict) subclass of the metaclasses of all its bases + + """ + new_log = QtCore.Signal(object) + + def emit(self, data): + """ + emit the `new_log` Signal with the given `data` parameter. + + :param data: the data to emit along with the signal. + :type data: object + """ + # WARNING: the new-style connection does NOT work because PySide + # translates the emit method to self.emit, and that collides with + # the emit method for logging.Handler + # self.new_log.emit(log_item) + QtCore.QObject.emit(self, QtCore.SIGNAL('new_log(PyObject)'), data) + + def __init__(self, level=logbook.NOTSET, format_string=None, + encoding=None, filter=None, bubble=False): + + logbook.Handler.__init__(self, level, filter, bubble) + logbook.StringFormatterHandlerMixin.__init__(self, format_string) + + self.qt = self._QtSignaler() + self.logs = [] + + def __enter__(self): + return logbook.Handler.__enter__(self) + + def __exit__(self, exc_type, exc_value, tb): + return logbook.Handler.__exit__(self, exc_type, exc_value, tb) + + def emit(self, record): + """ + Emit the specified logging record using a Qt Signal. + Also add it to the history in order to be able to access it later. + + :param record: the record to emit + :type record: logbook.LogRecord + """ + global _LOGS_HISTORY + record.msg = self.format(record) + # NOTE: not optimal approach, we may want to look at + # bisect.insort with a custom approach to use key or + # http://code.activestate.com/recipes/577197-sortedcollection/ + # Sort logs on arrival, logs transmitted over zmq may arrive unsorted. + self.logs.append(record) + self.logs = sorted(self.logs, key=lambda r: r.time) + + # XXX: emitting the record on arrival does not allow us to sort here so + # in the GUI the logs may arrive with with some time sort problem. + # We should implement a sort-on-arrive for the log window. + # Maybe we should switch to a tablewidget item that sort automatically + # by timestamp. + # As a user workaround you can close/open the log window + self.qt.emit(record) + + +class _LogController(object): + def __init__(self): + self._qt_handler = QtLogHandler(format_string=LOG_FORMAT) + self._logbook_controller = None + self.new_log = self._qt_handler.qt.new_log + + def start_logbook_subscriber(self): + """ + Run in the background the log receiver. + """ + if self._logbook_controller is None: + subscriber = ZeroMQSubscriber('tcp://127.0.0.1:5000', multi=True) + self._logbook_controller = subscriber.dispatch_in_background( + self._qt_handler) + + def stop_logbook_subscriber(self): + """ + Stop the background thread that receives messages through zmq, also + close the subscriber socket. + This allows us to re-create the subscriber when we reopen this window + without getting an error at trying to connect twice to the zmq port. + """ + if self._logbook_controller is not None: + self._logbook_controller.stop() + self._logbook_controller.subscriber.close() + self._logbook_controller = None + + def get_logs(self): + return self._qt_handler.logs + +# use a global variable to store received logs through different opened +# instances of the log window as well as to containing the logbook background +# handle. +LOG_CONTROLLER = _LogController() |