senpy/senpy/__main__.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
#    Copyright 2014 J. Fernando Sánchez Rada - Grupo de Sistemas Inteligentes
#                                                       DIT, UPM
#
#    Licensed under the Apache License, Version 2.0 (the "License");
#    you may not use this file except in compliance with the License.
#    You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS,
#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#    See the License for the specific language governing permissions and
#    limitations under the License.
"""
Senpy is a modular sentiment analysis server. This script runs an instance of
the server.

"""

from flask import Flask
from senpy.extensions import Senpy

import logging
import os
import sys
import argparse
import senpy

SERVER_PORT = os.environ.get("PORT", 5000)


def main():
    parser = argparse.ArgumentParser(description='Run a Senpy server')
    parser.add_argument(
        '--level',
        '-l',
        metavar='logging_level',
        type=str,
        default="ERROR",
        help='Logging level')
    parser.add_argument(
        '--debug',
        '-d',
        action='store_true',
        default=False,
        help='Run the application in debug mode')
    parser.add_argument(
        '--default-plugins',
        action='store_true',
        default=False,
        help='Load the default plugins')
    parser.add_argument(
        '--host',
        type=str,
        default="0.0.0.0",
        help='Use 0.0.0.0 to accept requests from any host.')
    parser.add_argument(
        '--port',
        '-p',
        type=int,
        default=SERVER_PORT,
        help='Port to listen on.')
    parser.add_argument(
        '--plugins-folder',
        '-f',
        type=str,
        default='.',
        help='Where to look for plugins.')
    parser.add_argument(
        '--only-install',
        '-i',
        action='store_true',
        default=False,
        help='Do not run a server, only install plugin dependencies')
    parser.add_argument(
        '--only-list',
        '--list',
        action='store_true',
        default=False,
        help='Do not run a server, only list plugins found')
    parser.add_argument(
        '--data-folder',
        '--data',
        type=str,
        default=None,
        help='Where to look for data. It be set with the SENPY_DATA environment variable as well.')
    parser.add_argument(
        '--threaded',
        action='store_false',
        default=True,
        help='Run a threaded server')
    parser.add_argument(
        '--version',
        '-v',
        action='store_true',
        default=False,
        help='Output the senpy version and exit')
    args = parser.parse_args()
    if args.version:
        print('Senpy version {}'.format(senpy.__version__))
        print(sys.version)
        exit(1)
    rl = logging.getLogger()
    rl.setLevel(getattr(logging, args.level))
    app = Flask(__name__)
    app.debug = args.debug
    sp = Senpy(app, args.plugins_folder,
               default_plugins=args.default_plugins,
               data_folder=args.data_folder)
    if args.only_list:
        plugins = sp.plugins()
        maxwidth = max(len(x.id) for x in plugins)
        for plugin in plugins:
            import inspect
            fpath = inspect.getfile(plugin.__class__)
            print('{: <{width}} @ {}'.format(plugin.id, fpath, width=maxwidth))
        return
    sp.install_deps()
    if args.only_install:
        return
    sp.activate_all()
    print('Senpy version {}'.format(senpy.__version__))
    print('Server running on port %s:%d. Ctrl+C to quit' % (args.host,
                                                            args.port))
    app.run(args.host,
            args.port,
            threaded=args.threaded,
            debug=app.debug)
    sp.deactivate_all()


if __name__ == '__main__':
    main()