utils.py

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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.
#

import logging
import os
import subprocess
import csv
import sys
import ConfigParser


class Util(object):
    @classmethod
    def get_logger(cls, logger_name, create_file=False):

        # create logger for prd_ci
        log = logging.getLogger(logger_name)
        log.setLevel(level=logging.INFO)

        # create formatter and add it to the handlers
        formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

        if create_file:
            # create file handler for logger.
            fh = logging.FileHandler('oa.log')
            fh.setLevel(level=logging.DEBUG)
            fh.setFormatter(formatter)
        # reate console handler for logger.
        ch = logging.StreamHandler()
        ch.setLevel(level=logging.DEBUG)
        ch.setFormatter(formatter)

        # add handlers to logger.
        if create_file:
            log.addHandler(fh)

        log.addHandler(ch)
        return log

    @classmethod
    def get_spot_conf(cls):

        conf_file = "/etc/spot.conf"
        config = ConfigParser.ConfigParser()
        config.readfp(SecHead(open(conf_file)))

        return config

    @classmethod
    def create_oa_folders(cls, type, date):

        # create date and ingest summary folder structure if they don't' exist.
        root_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
        data_type_folder = "{0}/data/{1}/{2}"
        if not os.path.isdir(data_type_folder.format(root_path, type, date)): os.makedirs(
            data_type_folder.format(root_path, type, date))
        if not os.path.isdir(data_type_folder.format(root_path, type, "ingest_summary")): os.makedirs(
            data_type_folder.format(root_path, type, "ingest_summary"))

        # create ipynb folders.
        ipynb_folder = "{0}/ipynb/{1}/{2}".format(root_path, type, date)
        if not os.path.isdir(ipynb_folder): os.makedirs(ipynb_folder)

        # retun path to folders.
        data_path = data_type_folder.format(root_path, type, date)
        ingest_path = data_type_folder.format(root_path, type, "ingest_summary")
        return data_path, ingest_path, ipynb_folder

    @classmethod
    def get_ml_results_form_hdfs(cls, hdfs_file_path, local_path):

        # get results from hdfs.
        get_results_cmd = "hadoop fs -get {0} {1}/.".format(hdfs_file_path, local_path)
        subprocess.call(get_results_cmd, shell=True)
        return get_results_cmd

    @classmethod
    def read_results(cls, file, limit, delimiter=','):

        # read csv results.
        result_rows = []
        with open(file, 'rb') as results_file:
            csv_reader = csv.reader(results_file, delimiter=delimiter)
            for i in range(0, int(limit)):
                try:
                    row = csv_reader.next()
                except StopIteration:
                    return result_rows
                result_rows.append(row)
        return result_rows

    @classmethod
    def ip_to_int(self, ip):

        try:
            o = map(int, ip.split('.'))
            res = (16777216 * o[0]) + (65536 * o[1]) + (256 * o[2]) + o[3]
            return res

        except ValueError:
            return None

    @classmethod
    def create_csv_file(cls, full_path_file, content, delimiter=','):
        with open(full_path_file, 'w+') as u_file:
            writer = csv.writer(u_file, quoting=csv.QUOTE_NONE, delimiter=delimiter)
            writer.writerows(content)

    @classmethod
    def cast_val(self, value):
        try:
            val = int(value)
        except:
            try:
                val = float(value)
            except:
                val = str(value)
        return val


class SecHead(object):
    def __init__(self, fp):
        self.fp = fp
        self.sechead = '[conf]\n'

    def readline(self):
        if self.sechead:
            try:
                return self.sechead
            finally:
                self.sechead = None
        else:
            return self.fp.readline()


class ProgressBar(object):
    def __init__(self, total, prefix='', sufix='', decimals=2, barlength=60):
        self._total = total
        self._prefix = prefix
        self._sufix = sufix
        self._decimals = decimals
        self._bar_length = barlength
        self._auto_iteration_status = 0

    def start(self):
        self._move_progress_bar(0)

    def update(self, iterator):
        self._move_progress_bar(iterator)

    def auto_update(self):
        self._auto_iteration_status += 1
        self._move_progress_bar(self._auto_iteration_status)

    def _move_progress_bar(self, iteration):
        filledLength = int(round(self._bar_length * iteration / float(self._total)))
        percents = round(100.00 * (iteration / float(self._total)), self._decimals)
        bar = '#' * filledLength + '-' * (self._bar_length - filledLength)
        sys.stdout.write("{0} [{1}] {2}% {3}\r".format(self._prefix, bar, percents, self._sufix))
        sys.stdout.flush()

        if iteration == self._total: print("\n")