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#!/usr/bin/env python
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# encoding: utf-8
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"""
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A simple IPython logger application
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import os
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import sys
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import zmq
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from IPython.core.newapplication import ProfileDir
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from IPython.utils.traitlets import Bool, Dict, Unicode
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from IPython.parallel.apps.baseapp import (
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BaseParallelApplication,
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base_aliases
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)
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from IPython.parallel.apps.logwatcher import LogWatcher
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#-----------------------------------------------------------------------------
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# Module level variables
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#-----------------------------------------------------------------------------
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#: The default config file name for this application
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default_config_file_name = u'iplogger_config.py'
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_description = """Start an IPython logger for parallel computing.
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IPython controllers and engines (and your own processes) can broadcast log messages
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by registering a `zmq.log.handlers.PUBHandler` with the `logging` module. The
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logger can be configured using command line options or using a cluster
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directory. Cluster directories contain config, log and security files and are
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usually located in your ipython directory and named as "cluster_<profile>".
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See the `profile` and `profile_dir` options for details.
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"""
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#-----------------------------------------------------------------------------
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# Main application
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#-----------------------------------------------------------------------------
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aliases = {}
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aliases.update(base_aliases)
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aliases.update(dict(url='LogWatcher.url', topics='LogWatcher.topics'))
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class IPLoggerApp(BaseParallelApplication):
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name = u'iploggerz'
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description = _description
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config_file_name = Unicode(default_config_file_name)
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classes = [LogWatcher, ProfileDir]
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aliases = Dict(aliases)
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def initialize(self, argv=None):
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super(IPLoggerApp, self).initialize(argv)
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self.init_watcher()
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def init_watcher(self):
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try:
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self.watcher = LogWatcher(config=self.config, log=self.log)
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except:
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self.log.error("Couldn't start the LogWatcher", exc_info=True)
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self.exit(1)
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self.log.info("Listening for log messages on %r"%self.watcher.url)
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def start(self):
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self.watcher.start()
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try:
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self.watcher.loop.start()
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except KeyboardInterrupt:
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self.log.critical("Logging Interrupted, shutting down...\n")
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def launch_new_instance():
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"""Create and run the IPython LogWatcher"""
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app = IPLoggerApp.instance()
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app.initialize()
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app.start()
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if __name__ == '__main__':
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launch_new_instance()
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