def _cacheOpen(self, filename):
"""Open shelve database in filename and check version
Returns tuple (writeflag, shelve-object) on success or None on failure.
"""
# first try opening the cache read-write
try:
fh = dirshelve.open(filename)
writeflag = 1
except dirshelve.error:
# initial open failed -- try opening the cache read-only
try:
fh = dirshelve.open(filename,"r")
writeflag = 0
except dirshelve.error:
self.warning("Unable to open CL script cache file %s" %
(filename,))
return None
# check version of cache -- don't use it if out-of-date
if fh.has_key(_versionKey):
oldVersion = fh[_versionKey]
elif len(fh) == 0:
fh[_versionKey] = _currentVersion
oldVersion = _currentVersion
else:
oldVersion = 'v0'
if oldVersion == _currentVersion:
return (writeflag, fh)
# open succeeded, but version looks out-of-date
fh.close()
rv = None
msg = ["CL script cache file is obsolete version (old %s, current %s)" %
(`oldVersion`, `_currentVersion`)]
if not writeflag:
# we can't replace it if we couldn't open it read-write
msg.append("Ignoring obsolete cache file %s" % filename)
else:
# try renaming the old file and creating a new one
rfilename = filename + "." + oldVersion
try:
os.rename(filename, rfilename)
msg.append("Renamed old cache to %s" % rfilename)
try:
# create new cache file
fh = dirshelve.open(filename)
fh[_versionKey] = _currentVersion
msg.append("Created new cache file %s" % filename)
rv = (writeflag, fh)
except dirshelve.error:
msg.append("Could not create new cache file %s" % filename)
except OSError:
msg.append("Could not rename old cache file %s" % filename)
self.warning(string.join(msg,"\n"))
return rv
def _cacheOpen(self, filename):
"""Open shelve database in filename and check version
Returns tuple (writeflag, shelve-object, filename) on success or
None on failure.
This may modify the filename if necessary to open the correct version of
the cache.
"""
# filenames to try, open flags to use
filelist = [(filename, "w"),
('%s.%s' % (filename, _currentVersion()), "c")]
msg = []
for fname, flag in filelist:
# first try opening the cache read-write
try:
fh = dirshelve.open(fname, flag)
writeflag = 1
except dirshelve.error:
# initial open failed -- try opening the cache read-only
try:
fh = dirshelve.open(fname, "r")
writeflag = 0
except dirshelve.error:
# give up on this file and try the next one
msg.append("Unable to open CL script cache %s" % fname)
continue
# check version of cache -- don't use it if version mismatch
if len(fh) == 0:
fh[_versionKey] = _currentVersion()
oldVersion = fh.get(_versionKey, 'v0')
if oldVersion == _currentVersion():
# normal case -- cache version is as expected
return (writeflag, fh, fname)
elif fname.endswith(_currentVersion()):
# uh-oh, something is seriously wrong
msg.append(
"CL script cache %s has version mismatch, may be corrupt?"
% fname)
elif oldVersion > _currentVersion():
msg.append(
("CL script cache %s was created by " +
"a newer version of pyraf (cache %s, this pyraf %s)") %
(fname, ` oldVersion `, ` _currentVersion() `))
else:
msg.append(
"CL script cache %s is obsolete version (old %s, current %s)"
% (fname, ` oldVersion `, ` _currentVersion() `))
fh.close()
# failed to open either cache
self.warning("\n".join(msg))
return None
def _cacheOpen(self, filename):
"""Open shelve database in filename and check version
Returns tuple (writeflag, shelve-object, filename) on success or
None on failure.
This may modify the filename if necessary to open the correct version of
the cache.
"""
# filenames to try, open flags to use
filelist = [(filename, "w"),
('%s.%s' % (filename, _currentVersion()), "c")]
msg = []
for fname, flag in filelist:
# first try opening the cache read-write
try:
fh = dirshelve.open(fname, flag)
writeflag = 1
except dirshelve.error:
# initial open failed -- try opening the cache read-only
try:
fh = dirshelve.open(fname,"r")
writeflag = 0
except dirshelve.error:
# give up on this file and try the next one
msg.append("Unable to open CL script cache %s" % fname)
continue
# check version of cache -- don't use it if version mismatch
if len(fh) == 0:
fh[_versionKey] = _currentVersion()
oldVersion = fh.get(_versionKey, 'v0')
if oldVersion == _currentVersion():
# normal case -- cache version is as expected
return (writeflag, fh, fname)
elif fname.endswith(_currentVersion()):
# uh-oh, something is seriously wrong
msg.append("CL script cache %s has version mismatch, may be corrupt?" %
fname)
elif oldVersion > _currentVersion():
msg.append(("CL script cache %s was created by " +
"a newer version of pyraf (cache %s, this pyraf %s)") %
(fname, `oldVersion`, `_currentVersion()`))
else:
msg.append("CL script cache %s is obsolete version (old %s, current %s)" %
(fname, `oldVersion`, `_currentVersion()`))
fh.close()
# failed to open either cache
self.warning("\n".join(msg))
return None
def setUp(self):
self.shelf = dirshelve.open(TEST_DIR)
def setUp(self):
self.shelf = dirshelve.open(TEST_DIR, writeback=True)
