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FILE_SUFFIX = '.weave'
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def __init__(self, transport, prefixed=False, precious=False,
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dir_mode=None, file_mode=None):
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super(WeaveStore, self).__init__(transport,
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dir_mode=dir_mode, file_mode=file_mode,
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prefixed=prefixed, compressed=False)
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def __init__(self, transport, prefixed=False, precious=False):
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self._transport = transport
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self._prefixed = prefixed
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46
self._precious = precious
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def filename(self, file_id):
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def _put(self, file_id, f):
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self._transport.mkdir(hash_prefix(file_id), mode=self._dir_mode)
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self._transport.mkdir(hash_prefix(file_id))
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return self._transport.put(self.filename(file_id), f, mode=self._file_mode)
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return self._transport.put(self.filename(file_id), f)
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def get_weave(self, file_id, transaction):
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weave = transaction.map.find_weave(file_id)
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w = read_weave(self._get(file_id))
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transaction.map.add_weave(file_id, w)
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transaction.register_clean(w, precious=self._precious)
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# TODO: jam 20051219 This should check if there is a prelude
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# which is already cached, and if so, should remove it
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# But transaction doesn't seem to have a 'remove'
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# One workaround would be to re-add the object with
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def get_weave_prelude(self, file_id, transaction):
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weave = transaction.map.find_weave(weave_id)
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mutter("cache hit in %s for %s", self, weave_id)
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# We want transactions to also cache preludes if that
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# is all that we are loading. So we need a unique
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# identifier, so that someone who wants the whole text
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# won't get just the prelude
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weave_id = 'PRELUDE-' + file_id
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weave = transaction.map.find_weave(weave_id)
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mutter("cache hit in %s for %s", self, weave_id)
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w = read_weave(self._get(file_id), prelude=True)
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transaction.map.add_weave(weave_id, w)
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transaction.register_clean(w, precious=self._precious)
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def get_lines(self, file_id, rev_id, transaction):
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w = self.get_weave(file_id, transaction)
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return w.get(w.lookup(rev_id))
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def get_weave_prelude_or_empty(self, file_id, transaction):
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"""cheap version that reads the prelude but not the lines
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return self.get_weave_prelude(file_id, transaction)
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# We can cache here, because we know that there
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# is no complete object, since we got NoSuchFile
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weave = Weave(weave_name=file_id)
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transaction.map.add_weave(file_id, weave)
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transaction.register_clean(weave, precious=self._precious)
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def get_weave_or_empty(self, file_id, transaction):
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"""Return a weave, or an empty one if it doesn't exist."""