filedaemon.py

#!/usr/bin/env python
#------------------------------------------------------------------------------
#
# Project: prism view server
# Authors: Fabian Schindler <fabian.schindler@eox.at>
#
#------------------------------------------------------------------------------
# Copyright (C) 2020 EOX IT Services GmbH <https://eox.at>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies of this Software or works derived from this Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#-----------------------------------------------------------------------------

import os
import logging
import logging.config
import json

import pyinotify
import redis

from ingestor.browse_report import parse_browse_report
from ingestor.util import converter, save_mount_report


logger = logging.getLogger(__name__)

logging.config.dictConfig({
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'simple': {
            'format': '%(levelname)s: %(message)s',
        },
        'verbose': {
            'format': '[%(asctime)s][%(module)s] %(levelname)s: %(message)s',
        }
    },
    'handlers': {
        'console': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
            'formatter': 'verbose',
        }
    },
    'loggers': {
        '': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        }
    }
})

queue_name = os.environ['REDIS_PREPROCESS_MD_QUEUE_KEY']
watch_dir = os.environ['INOTIFY_WATCH_DIR']

client = redis.Redis(
    host=os.environ['REDIS_HOST'],
    port=int(os.environ.get('REDIS_PORT', '6379')),
    charset='utf-8',
    decode_responses=True,
)


watchmanager = pyinotify.WatchManager()

class EventHandler(pyinotify.ProcessEvent):
    def process_IN_CLOSE_WRITE(self, event):
        logger.info(f'Parsing browse file: {event.pathname}')

        with open(event.pathname) as f:
            browse_report = parse_browse_report(f)
        logger.debug(browse_report)
        if isinstance(browse_report, str):
            queue_content = browse_report

        else:
            queue_content = json.dumps(
                browse_report, default=converter
            )
        try:  
            client.lpush(queue_name, queue_content)
            
            save_mount_report(event.pathname, True)
        except Exception as e:

            save_mount_report(event.pathname, False) 
            logger.exception(e)

handler = EventHandler()
notifier = pyinotify.Notifier(watchmanager, handler)

wdd = watchmanager.add_watch(watch_dir, pyinotify.IN_CLOSE_WRITE, rec=True)

notifier.loop()