def read(self, params):
"""Read the information about the service space using the names of the platform
node instance and the service space"""
self._logger.info("%s called" % params)
result = RCMPMessage()
try:
res = {}
if self.pni[RCMPlatformNode.PNI_IS_MASTER]:
res[self.RES_EXISTING_SS_KEY] = self.get_service_spaces(params)
if self.I_ADDRESS_KEY in params and params[self.I_ADDRESS_KEY] and \
params[self.I_ADDRESS_KEY] != self.pni[RCMPlatformNode.PNI_ADDRESS]:
# the read must be executed by another platform node
d_res = self.delegate(params)
if d_res.is_ok():
# the search of installed nodes has gone well
res.update(d_res.get_response_reason())
else:
raise Exception(d_res.get_response_reason())
result.create_ok_response(res)
else:
# this is the platform node that has to do the read
res[self.RES_INSTALLED_SN_KEY] = self.find_packages_info()
result.create_ok_response(res)
except Exception as e:
reason = "The %s read failed: %s" % (self._who, e)
result.create_error_response(reason)
self._logger.info(result.get_txt())
return result
