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#! /usr/bin/env python
# Author: Dimitri Fontaine <dim@tapoueh.org>
"""
PostgreSQL data import tool, see included man page.
"""
import os, sys, os.path, time, codecs, logging, threading, signal
from cStringIO import StringIO
from tempfile import gettempdir
import pgloader.options
import pgloader.tools
import pgloader.logger
from pgloader.tools import PGLoader_Error
def parse_options():
""" Parse given options """
import ConfigParser
from optparse import OptionParser
usage = "%prog [-c <config_filename>] Section [Section ...]"
parser = OptionParser(usage = usage)
parser.add_option("--version", action = "store_true",
dest = "version",
default = False,
help = "show pgloader version")
parser.add_option("-c", "--config", dest = "config",
default = "pgloader.conf",
help = "configuration file, defauts to pgloader.conf")
parser.add_option("-p", "--pedantic", action = "store_true",
dest = "pedantic",
default = False,
help = "pedantic mode, stop processing on warning")
parser.add_option("-d", "--debug", action = "store_true",
dest = "debug",
default = False,
help = "add some debug information (a lot of)")
parser.add_option("-v", "--verbose", action = "store_true",
dest = "verbose",
default = False,
help = "be verbose and about processing progress")
parser.add_option("-q", "--quiet", action = "store_true",
dest = "quiet",
default = False,
help = "be quiet, only print out errors")
parser.add_option("-l", "--level", dest = "loglevel",
default = None,
help = "loglevel to use: ERROR, WARNING, INFO, DEBUG")
parser.add_option("-L", "--logfile", dest = "logfile",
default = os.path.join (gettempdir(), "pgloader.log"),
help = "log file, defauts to $TMPDIR/pgloader.log")
parser.add_option("-r", "--reject-log", dest = "reject_log",
default = None,
help = "log file for rejected data error messages")
parser.add_option("-j", "--reject-data", dest = "reject_data",
default = None,
help = "log file for rejected data, bad input data")
parser.add_option("-s", "--summary", action = "store_true",
dest = "summary",
default = False,
help = "print a summary")
parser.add_option("-n", "--dry-run", action = "store_true",
dest = "dryrun",
default = False,
help = "simulate operations, don't connect to the db")
parser.add_option("-T", "--truncate", action = "store_true",
dest = "truncate",
default = False,
help = "truncate tables before importing data")
parser.add_option("-D", "--disable-triggers", action = "store_true",
dest = "triggers",
default = False,
help = "Disable triggers before loading, Enable them again after")
parser.add_option("-V", "--vacuum", action = "store_true",
dest = "vacuum",
default = False,
help = "vacuum tables after data loading")
parser.add_option("-C", "--count", dest = "count",
default = None, type = "int",
help = "number of input lines to process")
parser.add_option("-F", "--from", dest = "fromcount",
default = 0, type = "int",
help = "number of input lines to skip")
parser.add_option("-I", "--from-id", dest = "fromid",
default = None,
help = "wait for given id on input to begin")
parser.add_option("-f", "--field-separator", dest = "fsep",
default = pgloader.options.FIELD_SEP,
help = "default field separator to use")
parser.add_option("-E", "--encoding", dest = "encoding",
default = None,
help = "input files encoding")
parser.add_option("-o", "--pg-options", dest = "pg_options", action = "append",
help = "list of PostgreSQL options you want to SET")
parser.add_option("-t", "--section-threads", dest = "section_threads",
default = pgloader.options.SECTION_THREADS,
type = "int",
help = "number of threads used per sections, default is 1")
parser.add_option("-m", "--max-parallel-sections", dest = "parallel",
default = pgloader.options.MAX_PARALLEL_SECTIONS,
type = "int",
help = "number of sections to load in parralel, " +\
"default is 1")
parser.add_option("-R", "--reformat_path", dest = "reformat_path",
default = None,
help = "PATH where to find reformat python modules")
parser.add_option("-1", "--psycopg1", action = "store_true",
dest = "psycopg1",
default = False,
help = "Force usage of psycopg1")
parser.add_option("-2", "--psycopg2", action = "store_true",
dest = "psycopg2",
default = False,
help = "Force usage of psycopg2")
parser.add_option("--psycopg-version", dest = "psycopg_version",
default = None,
help = "Force usage of given version of psycopg")
parser.add_option("--load-from-stdin", action = "store_true",
dest = "stdin",
default = False,
help = "Load standard input data into given table name")
parser.add_option("--load-to-table", dest = "table",
default = None,
help = "Load to given table when --load-from-stdin")
parser.add_option("--boundaries", dest = "boundaries",
default = None,
help = "Load only in given boundaries, Start..End")
(opts, args) = parser.parse_args()
if opts.version:
print "PGLoader version %s" % pgloader.options.PGLOADER_VERSION
sys.exit(0)
# check existence and read ability of config file
if not os.path.exists(opts.config):
print >>sys.stderr, \
"Error: Configuration file %s does not exists" % opts.config
print >>sys.stderr, parser.format_help()
sys.exit(1)
if not os.access(opts.config, os.R_OK):
print >>sys.stderr, \
"Error: Can't read configuration file %s" % opts.config
print >>sys.stderr, parser.format_help()
sys.exit(1)
if opts.fromcount != 0 and opts.fromid is not None:
print >>sys.stderr, \
"Error: Can't set both options fromcount (-F) AND fromid (-I)"
sys.exit(1)
if opts.quiet and (opts.verbose or opts.debug):
print >>sys.stderr, \
"Error: Can't be verbose and quiet at the same time!"
sys.exit(1)
psyco_opts = 0
for opt in [opts.psycopg1, opts.psycopg2, opts.psycopg_version]:
if opt:
psyco_opts += 1
if psyco_opts > 1:
print >>sys.stderr, \
"Error: please use only one of the psycopg options"
sys.exit(1)
if opts.psycopg_version is not None:
if opts.psycopg_version in ("1", "2"):
opts.psycopg_version = int(opts.psycopg_version)
else:
print >>sys.stderr, \
"Error: psycopg_version can only be set to either 1 or 2"
sys.exit(1)
# if debug, then verbose
if opts.debug:
opts.verbose = True
pgloader.options.DRY_RUN = opts.dryrun
pgloader.options.DEBUG = opts.debug
pgloader.options.VERBOSE = opts.verbose
pgloader.options.QUIET = opts.quiet
pgloader.options.SUMMARY = opts.summary
pgloader.options.PEDANTIC = opts.pedantic
pgloader.options.TRUNCATE = opts.truncate
pgloader.options.VACUUM = opts.vacuum
pgloader.options.TRIGGERS = opts.triggers
pgloader.options.COUNT = opts.count
pgloader.options.FROM_COUNT = opts.fromcount
pgloader.options.FROM_ID = opts.fromid
pgloader.options.FIELD_SEP = opts.fsep
pgloader.options.SECTION_THREADS = opts.section_threads
pgloader.options.MAX_PARALLEL_SECTIONS = opts.parallel
pgloader.options.LOAD_FROM_STDIN = opts.stdin
pgloader.options.LOAD_TO_TABLE = opts.table
if pgloader.options.MAX_PARALLEL_SECTIONS is None:
from pgloader.options import DEFAULT_MAX_PARALLEL_SECTIONS
pgloader.options.MAX_PARALLEL_SECTIONS = DEFAULT_MAX_PARALLEL_SECTIONS
pgloader.options.INPUT_ENCODING = opts.encoding
if opts.reformat_path:
pgloader.options.REFORMAT_PATH = opts.reformat_path
pgloader.options.LOG_FILE = opts.logfile
# reject file names must contain one %s which will get replaced by the
# section name
if opts.reject_log:
try:
unused = opts.reject_log % "that would be a section name"
except TypeError, e:
# TypeError: not all arguments converted during string formatting
# TypeError: not enough arguments for format string
print >>sys.stderr, \
"Error: reject log must contain a '%s' place holder for section name"
sys.exit(1)
pgloader.options.REJECT_LOG_FILE = opts.reject_log
if opts.reject_data:
try:
unused = opts.reject_data % "that would be a section name"
except TypeError, e:
# TypeError: not all arguments converted during string formatting
# TypeError: not enough arguments for format string
print >>sys.stderr, \
"Error: reject data must contain a '%s' place holder for section name"
sys.exit(1)
pgloader.options.REJECT_DATA_FILE = opts.reject_data
if opts.loglevel:
loglevel = pgloader.logger.level(opts.loglevel)
pgloader.options.CLIENT_MIN_MESSAGES = loglevel
elif opts.debug:
pgloader.options.CLIENT_MIN_MESSAGES = logging.DEBUG
elif opts.verbose:
pgloader.options.CLIENT_MIN_MESSAGES = logging.INFO
elif opts.quiet:
pgloader.options.CLIENT_MIN_MESSAGES = logging.ERROR
if opts.pg_options:
pgloader.options.PG_OPTIONS = {}
for o in opts.pg_options:
try:
n, v = [x.strip() for x in o.split('=')]
if v == "":
raise ValueError
pgloader.options.PG_OPTIONS[n] = v
except ValueError, e:
print >>sys.stderr, \
"Error: PostgreSQL options must have the form 'name=value'"
sys.exit(1)
if opts.psycopg1:
pgloader.options.PSYCOPG_VERSION = 1
elif opts.psycopg2:
pgloader.options.PSYCOPG_VERSION = 2
else:
pgloader.options.PSYCOPG_VERSION = opts.psycopg_version
if opts.boundaries:
if opts.stdin:
print >>sys.stderr, \
"Error: You can't set the boundaries of stdin."
sys.exit(1)
try:
start, end = [int(x) for x in opts.boundaries.split("..")]
pgloader.options.FILE_BOUNDARIES = (start, end)
except ValueError, e:
print >>sys.stderr, \
"Error: boundaries should be an integer range written X..Y"
sys.exit(1)
return opts.config, args
def parse_config(conffile):
""" Parse the configuration file """
section = 'pgsql'
# Now read pgsql configuration section
import ConfigParser
config = ConfigParser.ConfigParser()
try:
config.read(conffile)
except:
print >>sys.stderr, "Error: Given file is not a configuration file"
sys.exit(4)
if not config.has_section(section):
print >>sys.stderr, "Error: Please provide a [%s] section" % section
sys.exit(5)
# load some options
# this has to be done after command line parsing
from pgloader.options import DRY_RUN, VERBOSE, DEBUG, PEDANTIC
from pgloader.options import NULL, EMPTY_STRING
from pgloader.options import CLIENT_MIN_MESSAGES, LOG_FILE
from pgloader.options import PG_OPTIONS
from pgloader.tools import check_dirname
# first read the logging configuration
if not CLIENT_MIN_MESSAGES:
if config.has_option(section, 'client_min_messages'):
cmm = config.get(section, 'client_min_messages')
pgloader.options.CLIENT_MIN_MESSAGES = pgloader.logger.level(cmm)
else:
# CLIENT_MIN_MESSAGES has not been set at all
pgloader.options.CLIENT_MIN_MESSAGES = logging.INFO
if config.has_option(section, 'log_min_messages'):
lmm = config.get(section, 'log_min_messages')
pgloader.options.LOG_MIN_MESSAGES = pgloader.logger.level(lmm)
else:
pgloader.options.LOG_MIN_MESSAGES = logging.INFO
if config.has_option(section, 'log_file'):
# don't overload the command line -L option if given
if not pgloader.options.LOG_FILE:
pgloader.options.LOG_FILE = config.get(section, 'log_file')
if pgloader.options.LOG_FILE:
ok, logdir_mesg = check_dirname(pgloader.options.LOG_FILE)
if not ok:
# force default setting
pgloader.options.LOG_FILE = pgloader.options.DEFAULT_LOG_FILE
try:
log = pgloader.logger.init(pgloader.options.CLIENT_MIN_MESSAGES,
pgloader.options.LOG_MIN_MESSAGES,
pgloader.options.LOG_FILE)
except PGLoader_Error, e:
try:
log = pgloader.logger.init(pgloader.options.CLIENT_MIN_MESSAGES,
pgloader.options.LOG_MIN_MESSAGES,
pgloader.options.DEFAULT_LOG_FILE)
log.warning(e)
log.warning("Using default logfile %s",
pgloader.options.DEFAULT_LOG_FILE)
except PGLoader_Error, e:
print e
sys.exit(8)
pgloader.logger.log = log
log.info("Logger initialized")
if logdir_mesg:
log.error(logdir_mesg)
log.error("Default logfile %s has been used instead",
pgloader.options.LOG_FILE)
if config.has_option(section, 'input_encoding'):
input_encoding = pgloader.tools.parse_config_string(
config.get(section, 'input_encoding'))
pgloader.options.INPUT_ENCODING = input_encoding
# optionnal global newline_escapes
if config.has_option(section, 'newline_escapes'):
setting = pgloader.tools.parse_config_string(
config.get(section, 'newline_escapes'))
pgloader.options.NEWLINE_ESCAPES = setting
# Then there are null and empty_string optionnal parameters
# They canbe overriden in specific table configuration
if config.has_option(section, 'null'):
pgloader.options.NULL = pgloader.tools.parse_config_string(
config.get(section, 'null'))
if config.has_option(section, 'empty_string'):
pgloader.options.EMPTY_STRING = pgloader.tools.parse_config_string(
config.get(section, 'empty_string'))
if config.has_option(section, 'reformat_path'):
# command line value is prefered to config format one
if not pgloader.options.REFORMAT_PATH:
rpath = config.get(section, 'reformat_path')
pgloader.options.REFORMAT_PATH = rpath
if config.has_option(section, 'max_parallel_sections'):
if not pgloader.options.MAX_PARALLEL_SECTIONS:
mps = config.getint(section, 'max_parallel_sections')
pgloader.options.MAX_PARALLEL_SECTIONS = mps
return config
def myprint(l, line_prefix = " ", cols = 78):
""" pretty print list l elements """
# some code for pretty print
lines = []
tmp = line_prefix
for e in l:
if len(tmp) + len(e) > cols:
lines.append(tmp)
tmp = line_prefix
if tmp != line_prefix: tmp += " "
tmp += e
lines.append(tmp)
return lines
def duration_pprint(duration):
""" pretty print duration (human readable information) """
if duration > 3600:
h = int(duration / 3600)
m = int((duration - 3600 * h) / 60)
s = duration - 3600 * h - 60 * m + 0.5
return '%2dh%02dm%03.1f' % (h, m, s)
elif duration > 60:
m = int(duration / 60)
s = duration - 60 * m
return ' %02dm%06.3f' % (m, s)
else:
return '%10.3f' % duration
def print_summary(dbconn, sections, summary, td):
""" print a pretty summary """
from pgloader.options import VERBOSE, DEBUG, QUIET, SUMMARY
from pgloader.options import DRY_RUN, PEDANTIC, VACUUM
from pgloader.pgloader import PGLoader
retcode = 0
t= 'Table name | duration | size | copy rows | errors '
_= '===================================================================='
tu = te = ts = 0 # total updates, errors, size
if False and not DRY_RUN:
dbconn.reset()
cursor = dbconn.dbconn.cursor()
s_ok = 0
for s in sections:
if s not in summary:
continue
s_ok += 1
if s_ok == 1:
# print pretty sumary header now
print
print t
print _
if summary[s]:
t, d, u, e = summary[s]
d = duration_pprint(d)
else:
t = s
d = '%9s ' % '-'
u = e = 0
if False and not DRY_RUN:
sql = "select pg_total_relation_size(%s), " + \
"pg_size_pretty(pg_total_relation_size(%s));"
cursor.execute(sql, [t, t])
octets, sp = cursor.fetchone()
ts += octets
if sp[5:] == 'bytes': sp = sp[:-5] + ' B'
else:
sp = '-'
tn = s
if len(tn) > 18:
tn = s[0:15] + "..."
print '%-18s| %ss | %7s | %10d | %10d' % (tn, d, sp, u, e)
tu += u
te += e
if e > 0:
retcode += 1
if s_ok > 1:
td = duration_pprint(td)
# pretty size
if False and not DRY_RUN:
cursor.execute("select pg_size_pretty(%s);", [ts])
[ts] = cursor.fetchone()
if ts[5:] == 'bytes': ts = ts[:-5] + ' B'
else:
ts = '-'
print _
print 'Total | %ss | %7s | %10d | %10d' \
% (td, ts, tu, te)
if False and not DRY_RUN:
cursor.close()
return retcode
def load_data():
""" read option line and configuration file, then process data
import of given section, or all sections if no section is given on
command line """
# first parse command line options, and set pgloader.options values
# accordingly
conffile, args = parse_options()
# now init db connection
config = parse_config(conffile)
from pgloader.logger import log
from pgloader.tools import read_path, check_path
from pgloader.options import VERBOSE
import pgloader.options
if pgloader.options.REFORMAT_PATH:
rpath = read_path(pgloader.options.REFORMAT_PATH, log, check = False)
crpath = check_path(rpath, log)
else:
rpath = crpath = None
if not crpath:
if rpath:
# don't check same path entries twice
default_rpath = set(crpath) \
- set(pgloader.options.DEFAULT_REFORMAT_PATH)
else:
default_rpath = pgloader.options.DEFAULT_REFORMAT_PATH
pgloader.options.REFORMAT_PATH = check_path(default_rpath, log)
else:
pgloader.options.REFORMAT_PATH = rpath
log.info('Reformat path is %s', pgloader.options.REFORMAT_PATH)
# load some pgloader package modules
from pgloader.options import VERBOSE, DEBUG, QUIET, SUMMARY
from pgloader.options import DRY_RUN, PEDANTIC, VACUUM
from pgloader.options import MAX_PARALLEL_SECTIONS
from pgloader.options import LOAD_FROM_STDIN, LOAD_TO_TABLE
from pgloader.options import FILE_BOUNDARIES
from pgloader.pgloader import PGLoader
from pgloader.tools import PGLoader_Error
sections = []
summary = {}
# args are meant to be configuration sections, or filenames, or stdin
if LOAD_FROM_STDIN:
if FILE_BOUNDARIES is not None:
log.warning("Can't use --boundaries on stdin")
if len(args) == 0:
s = '<stdin>'
config.add_section(s)
config.set(s, 'table', LOAD_TO_TABLE)
config.set(s, 'filename', 'sys.stdin')
config.set(s, 'columns', '*')
config.set(s, 'format', 'csv')
sections.append(s)
elif len(args) == 1:
if config.has_section(args[0]):
# apply given section parameters, then load from stdin
config.set(args[0], 'filename', 'sys.stdin')
sections.append(args[0])
else:
print >>sys.stderr, \
"Error: Please provide a [%s] section" % args[0]
sys.exit(5)
else:
print >>sys.stderr, \
"Error: can't read several sections all from stdin"
sys.exit(5)
elif len(args) > 0:
for s in args:
if config.has_section(s):
sections.append(s)
else:
log.info("Creating a section for file '%s'" % s)
# a filename was given, apply [pgsql] defaults
# set the tablename as the filename sans extension
# consider columns = *
if not os.path.exists(s):
print >>sys.stderr, \
"Error: '%s' does not exists as a section nor as a file" % s
sys.exit(2)
config.add_section(s)
config.set(s, 'table', os.path.splitext(os.path.basename(s))[0])
config.set(s, 'filename', s)
config.set(s, 'columns', '*')
config.set(s, 'format', 'csv')
sections.append(s)
else:
if not LOAD_FROM_STDIN:
# don't load all sections first when asked to load stdin
log.debug("No argument on CLI, will consider all sections")
for s in config.sections():
if s != 'pgsql':
sections.append(s)
# we run through sorted section list, unless we got the section list
# from command line
sections.sort()
if FILE_BOUNDARIES is not None and len(sections) > 1:
print >>sys.stderr, \
"Error: will not apply boundaries on more than one file"
sys.exit(5)
log.info('Will consider following sections:')
for line in myprint(sections):
log.info(line)
# we count time passed from now on
begin = time.time()
threads = {}
started = {}
finished = {}
current = 0
max_running = MAX_PARALLEL_SECTIONS
if max_running == -1:
max_running = len(sections)
log.info('Will load %d section at a time' % max_running)
sem = threading.BoundedSemaphore(max_running)
while current < len(sections):
s = sections[current]
try:
loader = None
summary [s] = []
started [s] = threading.Event()
finished[s] = threading.Event()
try:
loader = PGLoader(s, config, sem,
(started[s], finished[s]), summary[s])
except PGLoader_Error, e:
# could not initialize properly this loader, don't
# ever wait for it
started[s] .set()
finished[s].set()
log.error(e)
if DEBUG:
raise
except IOError, e:
# No space left on device? can't log it
break
if loader:
if not loader.template:
if FILE_BOUNDARIES is not None and len(sections) == 1:
loader.reader.set_boundaries(FILE_BOUNDARIES)
filename = loader.filename
input_encoding = loader.input_encoding
threads[s] = loader
# .start() will sem.aquire(), so we won't have more
# than max_running threads running at any time.
log.debug("Starting a thread for %s" % s)
threads[s].start()
else:
log.info("Skipping section %s, which is a template" % s)
for d in (summary, started, finished):
d.pop(s)
except PGLoader_Error, e:
if e == '':
log.error('[%s] Please correct previous errors' % s)
else:
log.error('%s' % e)
if DEBUG:
raise
if PEDANTIC:
# was: threads[s].print_stats()
# but now thread[s] is no more alive
pass
except UnicodeDecodeError, e:
log.error("can't open '%s' with given input encoding '%s'" \
% (filename, input_encoding))
except IOError, e:
# typically, No Space Left On Device, can't report nor continue
break
current += 1
# get sure each thread is started, then each one is done
from pgloader.tools import check_events
check_events(started, log, "is running")
log.info("All threads are started, wait for them to terminate")
check_events(finished, log, "processing is over")
# check whether any thread failed
for section, loader in threads.iteritems():
if not loader.success:
return 1
# total duration
td = time.time() - begin
if SUMMARY:
try:
print_summary(None, sections, summary, td)
print
except PGLoader_Error, e:
log.error("Can't print summary: %s" % e)
return 1
except KeyboardInterrupt:
return 1
return 0
if __name__ == "__main__":
# default exit value
ret = 1
# Disable KeyboardInterrupt, just exit on CTRL+C
signal.signal(signal.SIGINT, signal.SIG_DFL)
try:
ret = load_data()
# SystemExit inherits from Exception in python < 2.5, so we have to
# handle it separately.
except SystemExit, e:
sys.exit(e.code)
except Exception, e:
from pgloader.options import DEBUG
if DEBUG:
raise
sys.stderr.write(str(e) + '\n')
sys.exit(1)
except IOError, e:
sys.stderr.write(str(e) + '\n')
sys.exit(1)
sys.exit(ret)
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