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#!/usr/bin/env python

# Copyright 2016 Google Inc. All Rights Reserved.

#

# 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.

"""This application demonstrates how to perform basic operations on logs and

log entries with Stackdriver Logging.

For more information, see the README.md under /logging and the

documentation at https://cloud.google.com/logging/docs.

"""

import argparse

from google.cloud import logging

# [START logging_write_log_entry]

def write_entry(logger_name):

"""Writes log entries to the given logger."""

logging_client = logging.Client()

# This log can be found in the Cloud Logging console under 'Custom Logs'.

logger = logging_client.logger(logger_name)

# Make a simple text log

logger.log_text('Hello, world!')

# Simple text log with severity.

logger.log_text('Goodbye, world!', severity='ERROR')

# Struct log. The struct can be any JSON-serializable dictionary.

logger.log_struct({

'name': 'King Arthur',

'quest': 'Find the Holy Grail',

'favorite_color': 'Blue'

})

print('Wrote logs to {}.'.format(logger.name))

# [END logging_write_log_entry]

# [START logging_list_log_entries]

def list_entries(logger_name):

"""Lists the most recent entries for a given logger."""

logging_client = logging.Client()

logger = logging_client.logger(logger_name)

print('Listing entries for logger {}:'.format(logger.name))

for entry in logger.list_entries():

timestamp = entry.timestamp.isoformat()

print('* {}: {}'.format

(timestamp, entry.payload))

# [END logging_list_log_entries]

# [START logging_delete_log]

def delete_logger(logger_name):

"""Deletes a logger and all its entries.

Note that a deletion can take several minutes to take effect.

"""

logging_client = logging.Client()

logger = logging_client.logger(logger_name)

logger.delete()

print('Deleted all logging entries for {}'.format(logger.name))

# [END logging_delete_log]

if __name__ == '__main__':

parser = argparse.ArgumentParser(

description=__doc__,

formatter_class=argparse.RawDescriptionHelpFormatter

)

parser.add_argument(

'logger_name', help='Logger name', default='example_log')

subparsers = parser.add_subparsers(dest='command')

subparsers.add_parser('list', help=list_entries.__doc__)

subparsers.add_parser('write', help=write_entry.__doc__)

subparsers.add_parser('delete', help=delete_logger.__doc__)

args = parser.parse_args()

if args.command == 'list':

list_entries(args.logger_name)

elif args.command == 'write':

write_entry(args.logger_name)

elif args.command == 'delete':

delete_logger(args.logger_name)