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# Copyright (C) 2007 Canonical Ltd
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Transport decorator that logs transport operations to .bzr.log."""
# see also the transportstats plugin, which gives you some summary information
# in a machine-readable dump
import StringIO
import cStringIO
import time
import types
from bzrlib.trace import mutter
from bzrlib.transport.decorator import (
TransportDecorator,
)
from bzrlib.transport.trace import (
DecoratorServer,
TransportTraceDecorator,
)
class TransportLogDecorator(TransportDecorator):
"""Decorator for Transports that logs interesting operations to .bzr.log.
In general we want to log things that usually take a network round trip
and may be slow.
Not all operations are logged yet.
"""
def __init__(self, *args, **kw):
super(TransportLogDecorator, self).__init__(*args, **kw)
def _make_hook(hookname):
def _hook(relpath, *args, **kw):
return self._log_and_call(hookname, relpath, *args, **kw)
return _hook
for methodname in (
'append_bytes',
'append_file',
'copy_to',
'delete',
'get',
'has',
'open_write_stream',
'mkdir',
'move',
'put_bytes', 'put_bytes_non_atomic', 'put_file put_file_non_atomic',
'list_dir', 'lock_read', 'lock_write',
'readv', 'rename', 'rmdir',
'stat',
'ulock',
):
setattr(self, methodname, _make_hook(methodname))
@classmethod
def _get_url_prefix(self):
return 'log+'
def iter_files_recursive(self):
# needs special handling because it does not have a relpath parameter
mutter("%s %s"
% ('iter_files_recursive', self._decorated.base))
return self._call_and_log_result('iter_files_recursive', (), {})
def _log_and_call(self, methodname, relpath, *args, **kwargs):
if kwargs:
kwargs_str = dict(kwargs)
else:
kwargs_str = ''
mutter("%s %s %s %s"
% (methodname, self._decorated.abspath(relpath),
self._shorten(self._strip_tuple_parens(args)),
kwargs_str))
return self._call_and_log_result(methodname, (relpath,) + args, kwargs)
def _call_and_log_result(self, methodname, args, kwargs):
before = time.time()
try:
result = getattr(self._decorated, methodname)(*args, **kwargs)
except Exception, e:
mutter(" --> %s" % e)
mutter(" %.03fs" % (time.time() - before))
raise
return self._show_result(before, methodname, result)
def _show_result(self, before, methodname, result):
result_len = None
if isinstance(result, types.GeneratorType):
# eagerly pull in all the contents, so that we can measure how
# long it takes to get them. this does make the behaviour a bit
# different, but we hope not noticably so
result = list(result)
if isinstance(result, (cStringIO.OutputType, StringIO.StringIO)):
val = repr(result.getvalue())
result_len = len(val)
shown_result = "%s(%s) (%d bytes)" % (result.__class__.__name__,
self._shorten(val), result_len)
elif methodname == 'readv':
num_hunks = len(result)
total_bytes = sum((len(d) for o,d in result))
shown_result = "readv response, %d hunks, %d total bytes" % (
num_hunks, total_bytes)
result_len = total_bytes
else:
shown_result = self._shorten(self._strip_tuple_parens(result))
mutter(" --> %s" % shown_result)
# XXX: the time may be wrong when e.g. a generator object is returned from
# an http readv, if the object is returned before the bulk data
# is read.
elapsed = time.time() - before
if result_len and elapsed > 0:
# this is the rate of higher-level data, not the raw network speed
mutter(" %9.03fs %8dkB/s" % (elapsed, result_len/elapsed/1024))
else:
mutter(" %9.03fs" % (elapsed))
return result
def _shorten(self, x):
if len(x) > 70:
x = x[:67] + '...'
return x
def _strip_tuple_parens(self, t):
t = repr(t)
if t[0] == '(' and t[-1] == ')':
t = t[1:-1]
return t
class LogDecoratorServer(DecoratorServer):
"""Server for testing."""
def get_decorator_class(self):
return TransportLogDecorator
def get_test_permutations():
"""Return the permutations to be used in testing."""
return [(TransportLogDecorator, LogDecoratorServer)]
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