← Back to branch summary

~bzr-pqm/bzr/bzr.dev

« back to all changes in this revision

Viewing changes to bzrlib/transport/trace.py

  • Committer: Robert Collins
  • Date: 2009-07-07 04:32:13 UTC
  • mto: This revision was merged to the branch mainline in revision 4524.
  • Revision ID: robertc@robertcollins.net-20090707043213-4hjjhgr40iq7gk2d
More informative assertions in xml serialisation.

Show diffs side-by-side

added added

removed removed

Lines of Context:
bzrlib/transport/trace.py
 
1
# Copyright (C) 2007 Canonical Ltd
 
2
#
 
3
# This program is free software; you can redistribute it and/or modify
 
4
# it under the terms of the GNU General Public License as published by
 
5
# the Free Software Foundation; either version 2 of the License, or
 
6
# (at your option) any later version.
 
7
#
 
8
# This program is distributed in the hope that it will be useful,
 
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
11
# GNU General Public License for more details.
 
12
#
 
13
# You should have received a copy of the GNU General Public License
 
14
# along with this program; if not, write to the Free Software
 
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
16
 
 
17
"""Implementation of Transport that traces transport operations.
 
18
 
 
19
This does not change the transport behaviour at all, merely records every call
 
20
and then delegates it.
 
21
"""
 
22
 
 
23
from bzrlib.transport.decorator import TransportDecorator, DecoratorServer
 
24
 
 
25
 
 
26
class TransportTraceDecorator(TransportDecorator):
 
27
    """A tracing decorator for Transports.
 
28
 
 
29
    Calls that potentially perform IO are logged to self._activity. The
 
30
    _activity attribute is shared as the transport is cloned, but not if a new
 
31
    transport is created without cloning.
 
32
 
 
33
    Not all operations are logged at this point, if you need an unlogged
 
34
    operation please add a test to the tests of this transport, for the logging
 
35
    of the operation you want logged.
 
36
 
 
37
    See also TransportLogDecorator, that records a machine-readable log in 
 
38
    memory for eg testing.
 
39
    """
 
40
 
 
41
    def __init__(self, url, _decorated=None, _from_transport=None):
 
42
        """Set the 'base' path where files will be stored.
 
43
 
 
44
        _decorated is a private parameter for cloning.
 
45
        """
 
46
        TransportDecorator.__init__(self, url, _decorated)
 
47
        if _from_transport is None:
 
48
            # newly created
 
49
            self._activity = []
 
50
        else:
 
51
            # cloned
 
52
            self._activity = _from_transport._activity
 
53
 
 
54
    def append_file(self, relpath, f, mode=None):
 
55
        """See Transport.append_file()."""
 
56
        return self._decorated.append_file(relpath, f, mode=mode)
 
57
 
 
58
    def append_bytes(self, relpath, bytes, mode=None):
 
59
        """See Transport.append_bytes()."""
 
60
        return self._decorated.append_bytes(relpath, bytes, mode=mode)
 
61
 
 
62
    def delete(self, relpath):
 
63
        """See Transport.delete()."""
 
64
        self._activity.append(('delete', relpath))
 
65
        return self._decorated.delete(relpath)
 
66
 
 
67
    def delete_tree(self, relpath):
 
68
        """See Transport.delete_tree()."""
 
69
        return self._decorated.delete_tree(relpath)
 
70
 
 
71
    @classmethod
 
72
    def _get_url_prefix(self):
 
73
        """Tracing transports are identified by 'trace+'"""
 
74
        return 'trace+'
 
75
 
 
76
    def get(self, relpath):
 
77
        """See Transport.get()."""
 
78
        self._trace(('get', relpath))
 
79
        return self._decorated.get(relpath)
 
80
 
 
81
    def get_smart_client(self):
 
82
        return self._decorated.get_smart_client()
 
83
 
 
84
    def has(self, relpath):
 
85
        """See Transport.has()."""
 
86
        return self._decorated.has(relpath)
 
87
 
 
88
    def is_readonly(self):
 
89
        """See Transport.is_readonly."""
 
90
        return self._decorated.is_readonly()
 
91
 
 
92
    def mkdir(self, relpath, mode=None):
 
93
        """See Transport.mkdir()."""
 
94
        self._trace(('mkdir', relpath, mode))
 
95
        return self._decorated.mkdir(relpath, mode)
 
96
 
 
97
    def open_write_stream(self, relpath, mode=None):
 
98
        """See Transport.open_write_stream."""
 
99
        return self._decorated.open_write_stream(relpath, mode=mode)
 
100
 
 
101
    def put_file(self, relpath, f, mode=None):
 
102
        """See Transport.put_file()."""
 
103
        return self._decorated.put_file(relpath, f, mode)
 
104
 
 
105
    def put_bytes(self, relpath, bytes, mode=None):
 
106
        """See Transport.put_bytes()."""
 
107
        self._trace(('put_bytes', relpath, len(bytes), mode))
 
108
        return self._decorated.put_bytes(relpath, bytes, mode)
 
109
 
 
110
    def put_bytes_non_atomic(self, relpath, bytes, mode=None,
 
111
        create_parent_dir=False, dir_mode=None):
 
112
        """See Transport.put_bytes_non_atomic."""
 
113
        self._trace(('put_bytes_non_atomic', relpath, len(bytes), mode,
 
114
            create_parent_dir, dir_mode))
 
115
        return self._decorated.put_bytes_non_atomic(relpath, bytes, mode=mode,
 
116
            create_parent_dir=create_parent_dir, dir_mode=dir_mode)
 
117
 
 
118
    def listable(self):
 
119
        """See Transport.listable."""
 
120
        return self._decorated.listable()
 
121
 
 
122
    def iter_files_recursive(self):
 
123
        """See Transport.iter_files_recursive()."""
 
124
        return self._decorated.iter_files_recursive()
 
125
 
 
126
    def list_dir(self, relpath):
 
127
        """See Transport.list_dir()."""
 
128
        return self._decorated.list_dir(relpath)
 
129
 
 
130
    def readv(self, relpath, offsets, adjust_for_latency=False,
 
131
        upper_limit=None):
 
132
        # we override at the readv() level rather than _readv() so that any
 
133
        # latency adjustments will be done by the underlying transport
 
134
        self._trace(('readv', relpath, offsets, adjust_for_latency,
 
135
            upper_limit))
 
136
        return self._decorated.readv(relpath, offsets, adjust_for_latency,
 
137
            upper_limit)
 
138
 
 
139
    def recommended_page_size(self):
 
140
        """See Transport.recommended_page_size()."""
 
141
        return self._decorated.recommended_page_size()
 
142
 
 
143
    def rename(self, rel_from, rel_to):
 
144
        self._activity.append(('rename', rel_from, rel_to))
 
145
        return self._decorated.rename(rel_from, rel_to)
 
146
 
 
147
    def rmdir(self, relpath):
 
148
        """See Transport.rmdir."""
 
149
        self._trace(('rmdir', relpath))
 
150
        return self._decorated.rmdir(relpath)
 
151
 
 
152
    def stat(self, relpath):
 
153
        """See Transport.stat()."""
 
154
        return self._decorated.stat(relpath)
 
155
 
 
156
    def lock_read(self, relpath):
 
157
        """See Transport.lock_read."""
 
158
        return self._decorated.lock_read(relpath)
 
159
 
 
160
    def lock_write(self, relpath):
 
161
        """See Transport.lock_write."""
 
162
        return self._decorated.lock_write(relpath)
 
163
 
 
164
    def _trace(self, operation_tuple):
 
165
        """Record that a transport operation occured.
 
166
 
 
167
        :param operation: Tuple of transport call name and arguments.
 
168
        """
 
169
        self._activity.append(operation_tuple)
 
170
 
 
171
 
 
172
class TraceServer(DecoratorServer):
 
173
    """Server for the TransportTraceDecorator for testing with."""
 
174
 
 
175
    def get_decorator_class(self):
 
176
        return TransportTraceDecorator
 
177
 
 
178
 
 
179
def get_test_permutations():
 
180
    """Return the permutations to be used in testing."""
 
181
    return [(TransportTraceDecorator, TraceServer)]