[Zope-Checkins] CVS: Zope/lib/python/zLOG - FormatException.py:1.1.2.1 MinimalLogger.py:1.1.2.1 __init__.py:1.1.2.1

Shane Hathaway shane@digicool.com
Thu, 9 Aug 2001 13:33:46 -0400


Update of /cvs-repository/Zope/lib/python/zLOG
In directory cvs.zope.org:/tmp/cvs-serv29115/lib/python/zLOG

Added Files:
      Tag: NR-branch
	FormatException.py MinimalLogger.py __init__.py 
Log Message:
Sync NR-branch with trunk.  Sorry about so many checkin messages...


=== Added File Zope/lib/python/zLOG/FormatException.py ===
##############################################################################
# 
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
# 
# Copyright (c) Digital Creations.  All rights reserved.
# 
# This license has been certified as Open Source(tm).
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# 
# 1. Redistributions in source code must retain the above copyright
#    notice, this list of conditions, and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions, and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
# 
# 3. Digital Creations requests that attribution be given to Zope
#    in any manner possible. Zope includes a "Powered by Zope"
#    button that is installed by default. While it is not a license
#    violation to remove this button, it is requested that the
#    attribution remain. A significant investment has been put
#    into Zope, and this effort will continue if the Zope community
#    continues to grow. This is one way to assure that growth.
# 
# 4. All advertising materials and documentation mentioning
#    features derived from or use of this software must display
#    the following acknowledgement:
# 
#      "This product includes software developed by Digital Creations
#      for use in the Z Object Publishing Environment
#      (http://www.zope.org/)."
# 
#    In the event that the product being advertised includes an
#    intact Zope distribution (with copyright and license included)
#    then this clause is waived.
# 
# 5. Names associated with Zope or Digital Creations must not be used to
#    endorse or promote products derived from this software without
#    prior written permission from Digital Creations.
# 
# 6. Modified redistributions of any form whatsoever must retain
#    the following acknowledgment:
# 
#      "This product includes software developed by Digital Creations
#      for use in the Z Object Publishing Environment
#      (http://www.zope.org/)."
# 
#    Intact (re-)distributions of any official Zope release do not
#    require an external acknowledgement.
# 
# 7. Modifications are encouraged but must be packaged separately as
#    patches to official Zope releases.  Distributions that do not
#    clearly separate the patches from the original work must be clearly
#    labeled as unofficial distributions.  Modifications which do not
#    carry the name Zope may be packaged in any form, as long as they
#    conform to all of the clauses above.
# 
# 
# Disclaimer
# 
#   THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
#   EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
#   PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
#   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
#   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
#   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
#   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#   SUCH DAMAGE.
# 
# 
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations.  Specific
# attributions are listed in the accompanying credits file.
# 
##############################################################################
__version__='$Revision: 1.1.2.1 $'[11:-2]

import string, sys

format_exception_only=None
def format_exception(etype,value,tb,limit=None, delimiter='\n',
                     header='', trailer=''):
    global format_exception_only
    if format_exception_only is None:
        import traceback
        format_exception_only=traceback.format_exception_only
        
    result=['Traceback (innermost last):']
    if header: result.insert(0,header)
    if limit is None:
        if hasattr(sys, 'tracebacklimit'):
            limit = sys.tracebacklimit
    n = 0
    while tb is not None and (limit is None or n < limit):
        f = tb.tb_frame
        lineno = tb.tb_lineno
        co = f.f_code
        filename = co.co_filename
        name = co.co_name
        locals=f.f_locals
        result.append('  File %s, line %d, in %s'
                      % (filename,lineno,name))
        try: result.append('    (Object: %s)' %
                           locals[co.co_varnames[0]].__name__)
        except: pass
        try: result.append('    (Info: %s)' %
                           str(locals['__traceback_info__']))
        except: pass
        tb = tb.tb_next
        n = n+1
    result.append(string.join(format_exception_only(etype, value),
                       ' '))
    if trailer: result.append(trailer)
    
    return string.join(result, delimiter)


=== Added File Zope/lib/python/zLOG/MinimalLogger.py ===
##############################################################################
# 
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
# 
# Copyright (c) Digital Creations.  All rights reserved.
# 
# This license has been certified as Open Source(tm).
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# 
# 1. Redistributions in source code must retain the above copyright
#    notice, this list of conditions, and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions, and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
# 
# 3. Digital Creations requests that attribution be given to Zope
#    in any manner possible. Zope includes a "Powered by Zope"
#    button that is installed by default. While it is not a license
#    violation to remove this button, it is requested that the
#    attribution remain. A significant investment has been put
#    into Zope, and this effort will continue if the Zope community
#    continues to grow. This is one way to assure that growth.
# 
# 4. All advertising materials and documentation mentioning
#    features derived from or use of this software must display
#    the following acknowledgement:
# 
#      "This product includes software developed by Digital Creations
#      for use in the Z Object Publishing Environment
#      (http://www.zope.org/)."
# 
#    In the event that the product being advertised includes an
#    intact Zope distribution (with copyright and license included)
#    then this clause is waived.
# 
# 5. Names associated with Zope or Digital Creations must not be used to
#    endorse or promote products derived from this software without
#    prior written permission from Digital Creations.
# 
# 6. Modified redistributions of any form whatsoever must retain
#    the following acknowledgment:
# 
#      "This product includes software developed by Digital Creations
#      for use in the Z Object Publishing Environment
#      (http://www.zope.org/)."
# 
#    Intact (re-)distributions of any official Zope release do not
#    require an external acknowledgement.
# 
# 7. Modifications are encouraged but must be packaged separately as
#    patches to official Zope releases.  Distributions that do not
#    clearly separate the patches from the original work must be clearly
#    labeled as unofficial distributions.  Modifications which do not
#    carry the name Zope may be packaged in any form, as long as they
#    conform to all of the clauses above.
# 
# 
# Disclaimer
# 
#   THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
#   EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
#   PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
#   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
#   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
#   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
#   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#   SUCH DAMAGE.
# 
# 
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations.  Specific
# attributions are listed in the accompanying credits file.
# 
##############################################################################
__version__='$Revision: 1.1.2.1 $'[11:-2]

import string, sys, time

from FormatException import format_exception

def severity_string(severity, mapping={
    -300: 'TRACE',
    -200: 'DEBUG',
    -100: 'BLATHER',
       0: 'INFO',       
     100: 'PROBLEM', 
     200: 'ERROR',    
     300: 'PANIC', 
    }):
    """Convert a severity code to a string
    """
    s=int(severity)
    if mapping.has_key(s): s=mapping[s]
    else: s=''
    return "%s(%s)" % (s, severity)

def log_time():
    """Return a simple time string without spaces suitable for logging
    """
    return ("%4.4d-%2.2d-%2.2dT%2.2d:%2.2d:%2.2d"
            % time.gmtime(time.time())[:6])

def _set_stupid_dest(dest):
    global _stupid_dest
    _stupid_dest = dest

_stupid_dest=None
_stupid_severity=None
_no_stupid_log=[]
class stupid_log_write:

    def reinitialize(self):
        global _stupid_dest
        _stupid_dest = None        
    
    def __call__(self, subsystem, severity, summary, detail, error):

        global _stupid_dest
        if _stupid_dest is None:
            import os
            if os.environ.has_key('STUPID_LOG_FILE'):
                f=os.environ['STUPID_LOG_FILE']
                if f: _stupid_dest=open(f,'a')
                else:
                    _stupid_dest=sys.stderr
            else:
                _stupid_dest=_no_stupid_log

        if _stupid_dest is _no_stupid_log: return

        global _stupid_severity
        if _stupid_severity is None:
            try: _stupid_severity=string.atoi(os.environ['STUPID_LOG_SEVERITY'])
            except: _stupid_severity=0

        if severity < _stupid_severity: return

        _stupid_dest.write(
            "------\n"
            "%s %s %s %s\n%s"
            %
            (log_time(),
             severity_string(severity),
             subsystem,
             summary,
             detail,
             )
            )
        _stupid_dest.flush()

        if error:
            try:
                _stupid_dest.write(format_exception(
                    error[0], error[1], error[2],
                    trailer='\n', limit=100))
            except:
                _stupid_dest.write("%s: %s\n" % error[:2])
        _stupid_dest.flush()


log_write=stupid_log_write()


=== Added File Zope/lib/python/zLOG/__init__.py ===
##############################################################################
# 
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
# 
# Copyright (c) Digital Creations.  All rights reserved.
# 
# This license has been certified as Open Source(tm).
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# 
# 1. Redistributions in source code must retain the above copyright
#    notice, this list of conditions, and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions, and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
# 
# 3. Digital Creations requests that attribution be given to Zope
#    in any manner possible. Zope includes a "Powered by Zope"
#    button that is installed by default. While it is not a license
#    violation to remove this button, it is requested that the
#    attribution remain. A significant investment has been put
#    into Zope, and this effort will continue if the Zope community
#    continues to grow. This is one way to assure that growth.
# 
# 4. All advertising materials and documentation mentioning
#    features derived from or use of this software must display
#    the following acknowledgement:
# 
#      "This product includes software developed by Digital Creations
#      for use in the Z Object Publishing Environment
#      (http://www.zope.org/)."
# 
#    In the event that the product being advertised includes an
#    intact Zope distribution (with copyright and license included)
#    then this clause is waived.
# 
# 5. Names associated with Zope or Digital Creations must not be used to
#    endorse or promote products derived from this software without
#    prior written permission from Digital Creations.
# 
# 6. Modified redistributions of any form whatsoever must retain
#    the following acknowledgment:
# 
#      "This product includes software developed by Digital Creations
#      for use in the Z Object Publishing Environment
#      (http://www.zope.org/)."
# 
#    Intact (re-)distributions of any official Zope release do not
#    require an external acknowledgement.
# 
# 7. Modifications are encouraged but must be packaged separately as
#    patches to official Zope releases.  Distributions that do not
#    clearly separate the patches from the original work must be clearly
#    labeled as unofficial distributions.  Modifications which do not
#    carry the name Zope may be packaged in any form, as long as they
#    conform to all of the clauses above.
# 
# 
# Disclaimer
# 
#   THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
#   EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
#   PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
#   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
#   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
#   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
#   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#   SUCH DAMAGE.
# 
# 
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations.  Specific
# attributions are listed in the accompanying credits file.
# 
##############################################################################

"""General logging facility

This module attempts to provide a simple programming API for logging
with a pluggable API for defining where log messages should go.

Programmers call the LOG function to log information.

The LOG function, in turn, calls the log_write method to actually write
logging information somewhere.  This module provides a very simple
log_write implementation.  It is intended that applications main
programs will replace this method with a method more suited to their needs.

The module provides a register_subsystem method that does nothing, but
provides a hook that logging management systems could use to collect information about subsystems being used.

The module defines several standard severities:

  TRACE=-300   -- Trace messages

  DEBUG=-200   -- Debugging messages

  BLATHER=-100 -- Somebody shut this app up.

  INFO=0       -- For things like startup and shutdown.

  PROBLEM=100  -- This isn't causing any immediate problems, but deserves
                  attention.

  WARNING=100  -- A wishy-washy alias for PROBLEM.

  ERROR=200    -- This is going to have adverse effects.

  PANIC=300    -- We're dead!

Also, looging facilities will normally ignore negative severities.

To plug in a log handler, simply replace the log_write function
with a callable object that takes 5 arguments:


      subsystem -- The subsystem generating the message (e.g. ZODB)

      severity -- The "severity" of the event.  This may be an integer or
                  a floating point number.  Logging back ends may
                  consider the int() of this valua to be significant.
                  For example, a backend may consider any severity
                  whos integer value is WARNING to be a warning.

      summary -- A short summary of the event

      detail -- A detailed description

      error -- A three-element tuple consisting of an error type, value, and
               traceback.  If provided, then a summary of the error
               is added to the detail.

The callable object can provide a reinitialize method that may be
called with no arguments to reopen the log files (if any) as part of a
log-rotation facility. 

There is a default stupid logging facility that:

  - swallows logging information by default,

  - outputs to sys.stderr if the environment variable
    STUPID_LOG_FILE is set to an empty string, and

  - outputs to file if the environment variable
    STUPID_LOG_FILE is set to a file name.

  - Ignores errors that have a severity < 0 by default. This
    can be overridden with the environment variable STUPID_LOG_SEVERITY

"""
__version__='$Revision: 1.1.2.1 $'[11:-2]

from MinimalLogger import log_write, log_time, severity_string, \
     _set_stupid_dest
from FormatException import format_exception

# Standard severities
TRACE   = -300
DEBUG   = -200
BLATHER = -100
INFO    =    0      
PROBLEM =  100
WARNING =  100             
ERROR   =  200   
PANIC   =  300

def LOG(subsystem, severity, summary, detail='', error=None, reraise=None):
    """Log some information

    The required arguments are:

      subsystem -- The subsystem generating the message (e.g. ZODB)

      severity -- The "severity" of the event.  This may be an integer or
                  a floating point number.  Logging back ends may
                  consider the int() of this valua to be significant.
                  For example, a backend may consider any severity
                  whos integer value is WARNING to be a warning.

      summary -- A short summary of the event

      detail -- A detailed description

      error -- A three-element tuple consisting of an error type, value, and
               traceback.  If provided, then a summary of the error
               is added to the detail.

      reraise -- If provided with a true value, then the error given by
                 error is reraised.

    """
    log_write(subsystem, severity, summary, detail, error)
    if reraise and error:
        raise error[0], error[1], error[2]

_subsystems=[]
def register_subsystem(subsystem):
    """Register a subsystem name

    A logging facility might replace this function to collect information about
    subsystems used in an application.
    """
    _subsystems.append(subsystem)

# Most apps interested in logging only want the names below.
__all__ = ['LOG', 'TRACE', 'DEBUG', 'BLATHER', 'INFO', 'PROBLEM',
           'WARNING', 'ERROR', 'PANIC',]