// obtain delegation token for the give user from metastore
public synchronized String getDelegationTokenFromMetaStore(String owner)
throws HiveSQLException, UnsupportedOperationException, LoginException, IOException {
if (!hiveConf.getBoolVar(HiveConf.ConfVars.METASTORE_USE_THRIFT_SASL)
|| !hiveConf.getBoolVar(HiveConf.ConfVars.HIVE_SERVER2_ENABLE_DOAS)) {
throw new UnsupportedOperationException(
"delegation token is can only be obtained for a secure remote metastore");
}
try {
Hive.closeCurrent();
return Hive.get(hiveConf).getDelegationToken(owner, owner);
} catch (HiveException e) {
if (e.getCause() instanceof UnsupportedOperationException) {
throw (UnsupportedOperationException) e.getCause();
} else {
throw new HiveSQLException("Error connect metastore to setup impersonation", e);
}
}
}
