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#! /usr/bin/python
#
# Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#

"""
This file contains the disk usage utility for showing the estimated disk
storage of the databases and system files.
"""

from mysql.utilities.common.tools import check_python_version

# Check Python version compatibility
check_python_version()

import os
import sys
import time

from mysql.utilities.command import diskusage
from mysql.utilities.common.ip_parser import parse_connection
from mysql.utilities.common.options import setup_common_options
from mysql.utilities.common.options import add_verbosity
from mysql.utilities.common.options import add_format_option
from mysql.utilities.common.server import connect_servers
from mysql.utilities.common.tools import check_connector_python
from mysql.utilities.exception import FormatError
from mysql.utilities.exception import UtilError

# Constants
NAME = "MySQL Utilities - mysqldiskusage "
DESCRIPTION = "mysqldiskusage - show disk usage for databases"
USAGE = "%prog --server=user:pass@host:port:socket db1 --all"

# Check for connector/python
if not check_connector_python():
    sys.exit(1)

def print_elapsed_time(start_test):
    """Print the elapsed time to stdout (screen)

    start_test[in]      The starting time of the test
    """
    stop_test = time.time()
    display_time = int((stop_test - start_test) * 100)
    if display_time == 0:
        display_time = 1
    print("Time: %6d\n" % display_time)

# Setup the command parser and setup server, help
parser = setup_common_options(os.path.basename(sys.argv[0]),
                              DESCRIPTION, USAGE)

# Setup utility-specific options:

# Output format
add_format_option(parser, "display the output in either grid (default), "
                  "tab, csv, or vertical format", "grid")

# Header row
parser.add_option("-h", "--no-headers", action="store_true", dest="no_headers",
                  default=False, help="do not show column headers")

# Binlogs option
parser.add_option("-b", "--binlog", action="store_true", dest="do_binlog",
                  default=False, help="include binary log usage")

# Relay logs option
parser.add_option("-r", "--relaylog", action="store_true", dest="do_relaylog",
                  default=False, help="include relay log usage")

# Logs option
parser.add_option("-l", "--logs", action="store_true", dest="do_logs",
                  default=False, help="include general and slow log usage")

# Innodb option
parser.add_option("-i", "--innodb", action="store_true", dest="do_innodb",
                  default=False, help="include InnoDB tablespace usage")

# Show empty databases option
parser.add_option("-m", "--empty", action="store_true", dest="do_empty",
                  default=False, help="include empty databases")

# all option
parser.add_option("-a", "--all", action="store_true", dest="do_all",
                  default=False, help="show all usage including empty "
                  "databases")


# Add verbosity mode
add_verbosity(parser, True)

# Now we process the rest of the arguments.
opt, args = parser.parse_args()

# Parse source connection values
try:
    source_values = parse_connection(opt.server, None, opt)
except FormatError:
    _, err, _ = sys.exc_info()
    parser.error("Source connection values invalid: %s." % err)
except UtilError:
    _, err, _ = sys.exc_info()
    parser.error("Source connection values invalid: %s." % err.errmsg)

try:
    conn_options = {
        'version'   : "5.1.30",
    }
    servers = connect_servers(source_values, None)
except UtilError:
    _, e, _ = sys.exc_info()
    parser.error(e.errmsg)

try:
    res = servers[0].show_server_variable("datadir")
    datadir = res[0][1]
except UtilError:
    _, e, _ = sys.exc_info()
    parser.error(e.errmsg)

if not os.access(datadir, os.R_OK):
    print("\nNOTICE: Your user account does not have read access to the "
          "datadir. Data sizes will be calculated and actual file sizes "
          "may be omitted. Some features may be unavailable.\n")

# Set options for database operations.
options = {
    "format"        : opt.format,
    "no_headers"    : opt.no_headers,
    "verbosity"     : opt.verbosity,
    "debug"         : opt.verbosity >= 3,
    "have_read"     : os.access(datadir, os.R_OK),
    "do_empty"      : opt.do_empty,
    "do_all"        : opt.do_all,
    "quiet"         : opt.quiet
}

# We do database disk usage by default.
try:
    diskusage.show_database_usage(servers[0], datadir, args, options)
except UtilError:
    _, e, _ = sys.exc_info()
    print("ERROR: %s" % e.errmsg)
    sys.exit(1)

# Look for the general and query logs and report
if opt.do_logs or opt.do_all:
    try:
        diskusage.show_logfile_usage(servers[0], options)
    except UtilError:
        _, e, _ = sys.exc_info()
        print("ERROR: %s" % e.errmsg)
        sys.exit(1)

# Look for the binary logs and report
if opt.do_binlog or opt.do_all:
    try:
        options["log_type"] = 'binary log'
        diskusage.show_log_usage(servers[0], datadir, options)
    except UtilError:
        _, e, _ = sys.exc_info()
        print("ERROR: %s" % e.errmsg)
        sys.exit(1)

# Look for the relay logs and report
if opt.do_relaylog or opt.do_all:
    try:
        options["log_type"] = 'relay log'
        diskusage.show_log_usage(servers[0], datadir, options)
    except UtilError:
        _, e, _ = sys.exc_info()
        print("ERROR: %s" % e.errmsg)
        sys.exit(1)

# Look at the inoodb tablespace information are report
if opt.do_innodb or opt.do_all:
    try:
        diskusage.show_innodb_usage(servers[0], datadir, options)
    except UtilError:
        _, e, _ = sys.exc_info()
        print("ERROR: %s" % e.errmsg)
        sys.exit(1)

if not opt.quiet:
    print("#...done.")

sys.exit()