author | Alex Gilkes <alex.gilkes@nokia.com> |
Tue, 27 Oct 2009 16:36:35 +0000 | |
changeset 0 | 044383f39525 |
child 3 | e1eecf4d390d |
child 590 | 360bd6b35136 |
permissions | -rw-r--r-- |
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# |
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# Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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# All rights reserved. |
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# This component and the accompanying materials are made available |
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# under the terms of the License "Eclipse Public License v1.0" |
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# which accompanies this distribution, and is available |
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# at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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# |
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# Initial Contributors: |
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# Nokia Corporation - initial contribution. |
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# |
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# Contributors: |
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# |
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# Description: |
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# Class to control array of defined logging filters |
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# This class will act as a switch, controlling the list of filters iteratively |
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# |
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import os |
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import sys |
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import raptor |
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import filter_interface |
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import pluginbox |
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import traceback |
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class FilterWriteException(Exception): |
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def __init__(self, value): |
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self.parameter = value |
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def __str__(self): |
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return repr(self.parameter) |
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class BootstrapFilter(filter_interface.Filter): |
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def __init__(self): |
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self.out = sys.stdout |
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"""Use this until the CLI has supplied some real filters""" |
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def open(self, raptor_instance): |
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"""Set output to stdout for the various I/O methods to write to.""" |
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self.raptor = raptor_instance |
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return True |
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def write(self, text): |
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"""Write errors and warnings to stdout""" |
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if text.startswith("<error>"): |
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start = text.find(">") |
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end = text.rfind("<") |
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self.out.write(str(raptor.name) + ": error: %s\n" \ |
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% text[(start + 1):end]) |
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elif text.startswith("<warning"): |
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start = text.find(">") |
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end = text.rfind("<") |
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self.out.write(str(raptor.name) + ": warning: %s\n" \ |
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% text[(start + 1):end]) |
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elif "error" in text or "warning" in text: |
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self.out.write(text) |
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return True |
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def summary(self): |
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"""Write Summary""" |
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return False |
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def close(self): |
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"""Nothing to do for stdout""" |
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return True |
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class FilterList(filter_interface.Filter): |
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def __init__(self): |
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self.out = [BootstrapFilter()] |
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self.filters = [] |
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self.pbox = None |
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def open(self, raptor_instance, filternames, pbox): |
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""" |
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Call open function on each filter using raptor parameters provided |
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Returns: Boolean: Have the functions succeeded in opening the files? |
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""" |
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# Find all the filter plugins |
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self.pbox = pbox |
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possiblefilters = self.pbox.classesof(filter_interface.Filter) |
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unfound = [] |
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self.filters = [] |
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for f in filternames: |
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unfound.append(f) # unfound unless we find it |
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for pl in possiblefilters: |
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if pl.__name__.upper() == f.upper(): |
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self.filters.append(pl()) |
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unfound = unfound[:-1] |
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if unfound != []: |
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raise ValueError("requested filters not found: %s \ |
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\nAvailable filters are: %s" % (str(unfound), self.format_output_list(possiblefilters))) |
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|
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if self.filters == []: |
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self.out = [BootstrapFilter()] |
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else: |
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self.out=[] |
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for filter in self.filters: |
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if filter.open(raptor_instance): |
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self.out.append(filter) |
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else: |
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sys.stderr.write(str(raptor.name) + \ |
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": error: Cannot open filter: %s\n" % str(filter)) |
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ok = False |
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|
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if self.out == []: |
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sys.stderr.write(str(raptor.name) + \ |
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": warning: All filters failed to open. " + \ |
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"Defaulting to 'stdout'\n") |
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self.out = [BootstrapFilter()] |
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|
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def write(self, text): |
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""" |
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Iterate through each filter, calling their write function |
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""" |
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|
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if text is None: |
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return |
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|
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badfilters = [] |
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for filter in self.out: |
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try: |
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filter.write(text) |
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except Exception,e: |
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traceback.print_exc(file=sys.stdout) |
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sys.stdout.write("Called from: \n") |
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traceback.print_stack(file=sys.stdout) |
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sys.stdout.write("\n") |
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badfilters.append(filter) |
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|
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if len(badfilters) > 0: |
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for f in badfilters: |
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self.out.remove(f) # dump the filter in case it causes repeated exceptions |
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sys.stdout.write("Removed filter %s because it generated an exception\n" % type(f)) |
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|
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if len(self.out) == 0: |
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sys.stdout.write("Falling back to bootstrap filter\n") |
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self.out = [BootstrapFilter()] # Try to fall back to something in the worst case |
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|
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def summary(self): |
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""" |
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Run the summaries of all filters (prior to log end) |
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""" |
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for filter in self.out: |
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filter.summary() |
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|
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def close(self): |
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""" |
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Iterate through each filter, calling their close function |
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Returns True if all the filters close properly |
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""" |
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returnVal = True |
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|
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for filter in self.out: |
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if (filter != sys.stdout) and (filter != sys.stderr): |
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returnVal = returnVal and filter.close() |
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|
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return returnVal |
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|
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def format_output_list(self, possiblefilters): |
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""" |
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formats available filters |
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""" |
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filters_formatted = "" |
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for pl in possiblefilters: |
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filters_formatted += "\n " + pl.__name__ |
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return filters_formatted |
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170 |