systemd-python: move default call dicts from C to python

[elogind.git] / src / python-systemd / journal.py

diff --git a/src/python-systemd/journal.py b/src/python-systemd/journal.py
index 516ca1ab56a3982fa8110aa61205a83bc2c24df0..8a688f978b569ad102eb62597b1f1ad814590e8f 100644 (file)
--- a/src/python-systemd/journal.py
+++ b/src/python-systemd/journal.py
@@ -1,8 +1,10 @@
-#  -*- Mode: python; indent-tabs-mode: nil -*- */
+#  -*- Mode: python; coding:utf-8; indent-tabs-mode: nil -*- */

 #
 #  This file is part of systemd.
 #
 #
 #  This file is part of systemd.
 #

-#  Copyright 2012 David Strauss
+#  Copyright 2012 David Strauss <david@davidstrauss.net>
+#  Copyright 2012 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
+#  Copyright 2012 Marti Raudsepp <marti@juffo.org>

 #
 #  systemd is free software; you can redistribute it and/or modify it
 #  under the terms of the GNU Lesser General Public License as published by
 #
 #  systemd is free software; you can redistribute it and/or modify it
 #  under the terms of the GNU Lesser General Public License as published by


@@ -17,12 +19,101 @@
 #  You should have received a copy of the GNU Lesser General Public License
 #  along with systemd; If not, see <http://www.gnu.org/licenses/>.
 
 #  You should have received a copy of the GNU Lesser General Public License
 #  along with systemd; If not, see <http://www.gnu.org/licenses/>.
 

+import datetime
+import functools
+import sys
+import uuid

 import traceback as _traceback
 import os as _os
 import logging as _logging
 from syslog import (LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR,
                     LOG_WARNING, LOG_NOTICE, LOG_INFO, LOG_DEBUG)
 from ._journal import sendv, stream_fd
 import traceback as _traceback
 import os as _os
 import logging as _logging
 from syslog import (LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR,
                     LOG_WARNING, LOG_NOTICE, LOG_INFO, LOG_DEBUG)
 from ._journal import sendv, stream_fd

+from ._reader import (_Journal, NOP, APPEND, INVALIDATE,
+                      LOCAL_ONLY, RUNTIME_ONLY, SYSTEM_ONLY)
+
+_MONOTONIC_CONVERTER = lambda x: datetime.timedelta(microseconds=float(x))
+_REALTIME_CONVERTER = lambda x: datetime.datetime.fromtimestamp(float(x)/1E6)
+DEFAULT_CONVERTERS = {
+    'MESSAGE_ID': uuid.UUID,
+    'PRIORITY': int,
+    'LEADER': int,
+    'SESSION_ID': int,
+    'USERSPACE_USEC': int,
+    'INITRD_USEC': int,
+    'KERNEL_USEC': int,
+    '_UID': int,
+    '_GID': int,
+    '_PID': int,
+    'SYSLOG_FACILITY': int,
+    'SYSLOG_PID': int,
+    '_AUDIT_SESSION': int,
+    '_AUDIT_LOGINUID': int,
+    '_SYSTEMD_SESSION': int,
+    '_SYSTEMD_OWNER_UID': int,
+    'CODE_LINE': int,
+    'ERRNO': int,
+    'EXIT_STATUS': int,
+    '_SOURCE_REALTIME_TIMESTAMP': _REALTIME_CONVERTER,
+    '__REALTIME_TIMESTAMP': _REALTIME_CONVERTER,
+    '_SOURCE_MONOTONIC_TIMESTAMP': _MONOTONIC_CONVERTER,
+    '__MONOTONIC_TIMESTAMP': _MONOTONIC_CONVERTER,
+    'COREDUMP': bytes,
+    'COREDUMP_PID': int,
+    'COREDUMP_UID': int,
+    'COREDUMP_GID': int,
+    'COREDUMP_SESSION': int,
+    'COREDUMP_SIGNAL': int,
+    'COREDUMP_TIMESTAMP': _REALTIME_CONVERTER,
+}
+
+if sys.version_info >= (3,):
+    _convert_unicode = functools.partial(str, encoding='utf-8')
+else:
+    _convert_unicode = functools.partial(unicode, encoding='utf-8')
+
+class Journal(_Journal):
+    def __init__(self, converters=None, *args, **kwargs):
+        super(Journal, self).__init__(*args, **kwargs)
+        if sys.version_info >= (3,3):
+            self.converters = ChainMap()
+            if converters is not None:
+                self.converters.maps.append(converters)
+            self.converters.maps.append(DEFAULT_CONVERTERS)
+        else:
+            # suitable fallback, e.g.
+            self.converters = DEFAULT_CONVERTERS.copy()
+            if converters is not None:
+                self.converters.update(converters)
+
+    def _convert_field(self, key, value):
+        try:
+            result = self.converters[key](value)
+        except KeyError:
+            # Default conversion in unicode
+            try:
+                result = _convert_unicode(value)
+            except:
+                # Leave in default bytes
+                result = value
+        return result
+
+    def _convert_entry(self, entry):
+        result = {}
+        for key, value in entry.iteritems():
+            if isinstance(value, list):
+                result[key] = [self._convert_field(key, val) for val in value]
+            else:
+                result[key] = self._convert_field(key, value)
+        return result
+
+    def get_next(self, *args, **kwargs):
+        return self._convert_entry(
+            super(Journal, self).get_next(*args, **kwargs))
+
+    def query_unique(self, key, *args, **kwargs):
+        return set(self._convert_field(key, value)
+            for value in super(Journal, self).query_unique(key, *args, **kwargs))

 
 def _make_line(field, value):
         if isinstance(value, bytes):
 
 def _make_line(field, value):
         if isinstance(value, bytes):


@@ -33,24 +124,18 @@ def _make_line(field, value):
 def send(MESSAGE, MESSAGE_ID=None,
          CODE_FILE=None, CODE_LINE=None, CODE_FUNC=None,
          **kwargs):
 def send(MESSAGE, MESSAGE_ID=None,
          CODE_FILE=None, CODE_LINE=None, CODE_FUNC=None,
          **kwargs):

-        r"""Send a message to journald.
+        r"""Send a message to the journal.

 
         >>> journal.send('Hello world')
         >>> journal.send('Hello, again, world', FIELD2='Greetings!')
         >>> journal.send('Binary message', BINARY=b'\xde\xad\xbe\xef')
 
         Value of the MESSAGE argument will be used for the MESSAGE=
 
         >>> journal.send('Hello world')
         >>> journal.send('Hello, again, world', FIELD2='Greetings!')
         >>> journal.send('Binary message', BINARY=b'\xde\xad\xbe\xef')
 
         Value of the MESSAGE argument will be used for the MESSAGE=

-        field.
+        field. MESSAGE must be a string and will be sent as UTF-8 to
+        the journal.

 
         MESSAGE_ID can be given to uniquely identify the type of
 
         MESSAGE_ID can be given to uniquely identify the type of

-        message.
-
-        Other parts of the message can be specified as keyword
-        arguments.
-
-        Both MESSAGE and MESSAGE_ID, if present, must be strings, and
-        will be sent as UTF-8 to journal. Other arguments can be
-        bytes, in which case they will be sent as-is to journal.
+        message. It must be a string or a uuid.UUID object.

 
         CODE_LINE, CODE_FILE, and CODE_FUNC can be specified to
         identify the caller. Unless at least on of the three is given,
 
         CODE_LINE, CODE_FILE, and CODE_FUNC can be specified to
         identify the caller. Unless at least on of the three is given,


@@ -58,6 +143,11 @@ def send(MESSAGE, MESSAGE_ID=None,
         send(). CODE_FILE and CODE_FUNC must be strings, CODE_LINE
         must be an integer.
 
         send(). CODE_FILE and CODE_FUNC must be strings, CODE_LINE
         must be an integer.
 

+        Additional fields for the journal entry can only be specified
+        as keyword arguments. The payload can be either a string or
+        bytes. A string will be sent as UTF-8, and bytes will be sent
+        as-is to the journal.
+

         Other useful fields include PRIORITY, SYSLOG_FACILITY,
         SYSLOG_IDENTIFIER, SYSLOG_PID.
         """
         Other useful fields include PRIORITY, SYSLOG_FACILITY,
         SYSLOG_IDENTIFIER, SYSLOG_PID.
         """


@@ -65,7 +155,8 @@ def send(MESSAGE, MESSAGE_ID=None,
         args = ['MESSAGE=' + MESSAGE]
 
         if MESSAGE_ID is not None:
         args = ['MESSAGE=' + MESSAGE]
 
         if MESSAGE_ID is not None:

-                args.append('MESSAGE_ID=' + MESSAGE_ID)
+                id = getattr(MESSAGE_ID, 'hex', MESSAGE_ID)
+                args.append('MESSAGE_ID=' + id)

 
         if CODE_LINE == CODE_FILE == CODE_FUNC == None:
                 CODE_FILE, CODE_LINE, CODE_FUNC = \
 
         if CODE_LINE == CODE_FILE == CODE_FUNC == None:
                 CODE_FILE, CODE_LINE, CODE_FUNC = \


@@ -94,19 +185,20 @@ def stream(identifier, priority=LOG_DEBUG, level_prefix=False):
         <open file '<fdopen>', mode 'w' at 0x...>
         >>> stream.write('message...\n')
 
         <open file '<fdopen>', mode 'w' at 0x...>
         >>> stream.write('message...\n')
 

-        will produce the following message in the journal:
+        will produce the following message in the journal::

 
 

-        PRIORITY=7
-        SYSLOG_IDENTIFIER=myapp
-        MESSAGE=message...
+          PRIORITY=7
+          SYSLOG_IDENTIFIER=myapp
+          MESSAGE=message...

 
         Using the interface with print might be more convinient:
 
         >>> from __future__ import print_function
         >>> print('message...', file=stream)
 
 
         Using the interface with print might be more convinient:
 
         >>> from __future__ import print_function
         >>> print('message...', file=stream)
 

-        priority is the syslog priority, one of LOG_EMERG, LOG_ALERT,
-        LOG_CRIT, LOG_ERR, LOG_WARNING, LOG_NOTICE, LOG_INFO, LOG_DEBUG.
+        priority is the syslog priority, one of `LOG_EMERG`,
+        `LOG_ALERT`, `LOG_CRIT`, `LOG_ERR`, `LOG_WARNING`,
+        `LOG_NOTICE`, `LOG_INFO`, `LOG_DEBUG`.

 
         level_prefix is a boolean. If true, kernel-style log priority
         level prefixes (such as '<1>') are interpreted. See
 
         level_prefix is a boolean. If true, kernel-style log priority
         level prefixes (such as '<1>') are interpreted. See


@@ -120,7 +212,7 @@ class JournalHandler(_logging.Handler):
         """Journal handler class for the Python logging framework.
 
         Please see the Python logging module documentation for an
         """Journal handler class for the Python logging framework.
 
         Please see the Python logging module documentation for an

-        overview: http://docs.python.org/library/logging.html
+        overview: http://docs.python.org/library/logging.html.

 
         To create a custom logger whose messages go only to journal:
 
 
         To create a custom logger whose messages go only to journal:
 


@@ -129,31 +221,31 @@ class JournalHandler(_logging.Handler):
         >>> log.addHandler(journal.JournalHandler())
         >>> log.warn("Some message: %s", detail)
 
         >>> log.addHandler(journal.JournalHandler())
         >>> log.warn("Some message: %s", detail)
 

-        Note that by default, message levels INFO and DEBUG are ignored
-        by the logging framework. To enable those log levels:
+        Note that by default, message levels `INFO` and `DEBUG` are
+        ignored by the logging framework. To enable those log levels:

 
         >>> log.setLevel(logging.DEBUG)
 
         To attach journal MESSAGE_ID, an extra field is supported:
 
 
         >>> log.setLevel(logging.DEBUG)
 
         To attach journal MESSAGE_ID, an extra field is supported:
 

-        >>> log.warn("Message with ID",
-        >>>     extra={'MESSAGE_ID': '22bb01335f724c959ac4799627d1cb61'})
+        >>> import uuid
+        >>> mid = uuid.UUID('0123456789ABCDEF0123456789ABCDEF')
+        >>> log.warn("Message with ID", extra={'MESSAGE_ID': mid})

 
         To redirect all logging messages to journal regardless of where
         they come from, attach it to the root logger:
 
         >>> logging.root.addHandler(journal.JournalHandler())
 
 
         To redirect all logging messages to journal regardless of where
         they come from, attach it to the root logger:
 
         >>> logging.root.addHandler(journal.JournalHandler())
 

-        For more complex configurations when using dictConfig or
-        fileConfig, specify 'systemd.journal.JournalHandler' as the
+        For more complex configurations when using `dictConfig` or
+        `fileConfig`, specify `systemd.journal.JournalHandler` as the

         handler class.  Only standard handler configuration options
         handler class.  Only standard handler configuration options

-        are supported: level, formatter, filters.
+        are supported: `level`, `formatter`, `filters`.

 
         The following journal fields will be sent:
 
         The following journal fields will be sent:

-
-        MESSAGE, PRIORITY, THREAD_NAME, CODE_FILE, CODE_LINE,
-        CODE_FUNC, LOGGER (name as supplied to getLogger call),
-        MESSAGE_ID (optional, see above).
+        `MESSAGE`, `PRIORITY`, `THREAD_NAME`, `CODE_FILE`, `CODE_LINE`,
+        `CODE_FUNC`, `LOGGER` (name as supplied to getLogger call),
+        `MESSAGE_ID` (optional, see above).

         """
 
         def emit(self, record):
         """
 
         def emit(self, record):