def open(self, filepath, mode):
"""Opens an hpss file"""
#want to close any open files first
try:
if self._file:
self.close()
except ArchiveInterfaceError as ex:
err_str = "Can't close previous hpss file before "\
"opening new one with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
#try to open file
try:
fpath = un_abs_path(filepath)
filename = os.path.join(self._prefix, path_info_munge(fpath))
self._filepath = filename
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
hpss_fopen = self._hpsslib.hpss_Fopen
hpss_fopen.restype = c_void_p
self._file = hpss_fopen(filename, mode)
if self._file < 0:
err_str = "Failed opening Hpss File, code: " + str(self._file)
raise ArchiveInterfaceError(err_str)
return self
except Exception as ex:
err_str = "Can't open hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def open(self, filepath, mode):
"""Opens an hpss file"""
#want to close any open files first
try:
if self._file:
self.close()
except ArchiveInterfaceError as ex:
err_str = "Can't close previous hpss file before "\
"opening new one with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
#try to open file
try:
fpath = un_abs_path(filepath)
filename = os.path.join(self._prefix, path_info_munge(fpath))
self._filepath = filename
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
hpss_fopen = self._hpsslib.hpss_Fopen
hpss_fopen.restype = c_void_p
self._file = hpss_fopen(filename, mode)
if self._file < 0:
err_str = "Failed opening Hpss File, code: " + str(self._file)
raise ArchiveInterfaceError(err_str)
return self
except Exception as ex:
err_str = "Can't open hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def set_mod_time(self, mod_time):
"""Set the mod time for an hpss archive file """
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
hpss.set_mod_time(mod_time)
except Exception as ex:
err_str = "Can't set hpss file mod time with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def status(self):
"""Get the status of a file in the hpss archive """
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
return hpss.status()
except Exception as ex:
err_str = "Can't get hpss status with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def stage(self):
"""Stage an hpss file to the top level drive """
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
hpss.stage()
except Exception as ex:
err_str = "Can't stage hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def set_mod_time(self, mod_time):
"""Set the mod time for an hpss archive file """
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
hpss.set_mod_time(mod_time)
except Exception as ex:
err_str = "Can't set hpss file mod time with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def status(self):
"""Get the status of a file in the hpss archive """
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
return hpss.status()
except Exception as ex:
err_str = "Can't get hpss status with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def stage(self):
"""Stage an hpss file to the top level drive """
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
hpss.stage()
except Exception as ex:
err_str = "Can't stage hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def close(self):
"""Close an HPSS File"""
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
rcode = self._hpsslib.hpss_Fclose(self._file)
if rcode < 0:
err_str = "Failed to close hpss file with code: "+str(rcode)
raise ArchiveInterfaceError(err_str)
self._file = None
except Exception as ex:
err_str = "Can't close hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def write(self, buf):
"""Write a file to the hpss archive"""
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
buf_char_p = cast(buf, c_char_p)
rcode = self._hpsslib.hpss_Fwrite(buf_char_p, 1, len(buf),
self._file)
if rcode != len(buf):
raise ArchiveInterfaceError("Short write for hpss file")
except Exception as ex:
err_str = "Can't write hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def write(self, buf):
"""Write a file to the hpss archive"""
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
buf_char_p = cast(buf, c_char_p)
rcode = self._hpsslib.hpss_Fwrite(
buf_char_p, 1, len(buf), self._file
)
if rcode != len(buf):
raise ArchiveInterfaceError("Short write for hpss file")
except Exception as ex:
err_str = "Can't write hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def close(self):
"""Close an HPSS File"""
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
rcode = self._hpsslib.hpss_Fclose(self._file)
if rcode < 0:
err_str = "Failed to close hpss file with code: " + str(
rcode)
raise ArchiveInterfaceError(err_str)
self._file = None
except Exception as ex:
err_str = "Can't close hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def read(self, blocksize):
"""Read a file from the hpss archive"""
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
buf = create_string_buffer('\000'*blocksize)
rcode = self._hpsslib.hpss_Fread(buf, 1, blocksize, self._file)
if rcode < 0:
err_str = "Failed During HPSS Fread,"\
"return value is: " + str(rcode)
raise ArchiveInterfaceError(err_str)
return buf.value
except Exception as ex:
err_str = "Can't read hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)
def read(self, blocksize):
"""Read a file from the hpss archive"""
try:
if self._file:
hpss = HpssExtended(self._filepath, self._latency)
hpss.ping_core()
buf = create_string_buffer('\000' * blocksize)
rcode = self._hpsslib.hpss_Fread(buf, 1, blocksize, self._file)
if rcode < 0:
err_str = "Failed During HPSS Fread,"\
"return value is: " + str(rcode)
raise ArchiveInterfaceError(err_str)
return buf.value
except Exception as ex:
err_str = "Can't read hpss file with error: " + str(ex)
raise ArchiveInterfaceError(err_str)