package org.apache.howl.cli;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hive.metastore.MetaStoreUtils;
import org.apache.hadoop.hive.metastore.Warehouse;
import org.apache.hadoop.hive.ql.Driver;
import org.apache.hadoop.hive.ql.metadata.Hive;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.metadata.Table;
import org.apache.hadoop.hive.ql.processors.CommandProcessorResponse;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.apache.howl.common.HowlConstants;
public class HowlDriver extends Driver {
@Override
public CommandProcessorResponse run(String command) {
int ret = super.run(command).getResponseCode();
SessionState ss = SessionState.get();
if (ret == 0){
// Only attempt to do this, if cmd was successful.
ret = setFSPermsNGrp(ss);
}
// reset conf vars
ss.getConf().set(HowlConstants.HOWL_CREATE_DB_NAME, "");
ss.getConf().set(HowlConstants.HOWL_CREATE_TBL_NAME, "");
return new CommandProcessorResponse(ret);
}
private int setFSPermsNGrp(SessionState ss) {
Configuration conf =ss.getConf();
String tblName = conf.get(HowlConstants.HOWL_CREATE_TBL_NAME,"");
String dbName = conf.get(HowlConstants.HOWL_CREATE_DB_NAME, "");
String grp = conf.get(HowlConstants.HOWL_GROUP,null);
String permsStr = conf.get(HowlConstants.HOWL_PERMS,null);
if(tblName.isEmpty() && dbName.isEmpty()){
// it wasn't create db/table
return 0;
}
if(null == grp && null == permsStr) {
// there were no grp and perms to begin with.
return 0;
}
FsPermission perms = FsPermission.valueOf(permsStr);
if(!tblName.isEmpty()){
Hive db = null;
try{
db = Hive.get();
Table tbl = db.getTable(tblName);
Path tblPath = tbl.getPath();
FileSystem fs = tblPath.getFileSystem(conf);
if(null != perms){
fs.setPermission(tblPath, perms);
}
if(null != grp){
fs.setOwner(tblPath, null, grp);
}
return 0;
} catch (Exception e){
ss.err.println(String.format("Failed to set permissions/groups on TABLE: <%s> %s",tblName,e.getMessage()));
try { // We need to drop the table.
if(null != db){ db.dropTable(tblName); }
} catch (HiveException he) {
ss.err.println(String.format("Failed to drop TABLE <%s> after failing to set permissions/groups on it. %s",tblName,e.getMessage()));
}
return 1;
}
}
else{
// looks like a db operation
if (dbName.isEmpty() || dbName.equals(MetaStoreUtils.DEFAULT_DATABASE_NAME)){
// We dont set perms or groups for default dir.
return 0;
}
else{
try{
Path dbPath = new Warehouse(conf).getDefaultDatabasePath(dbName);
FileSystem fs = dbPath.getFileSystem(conf);
if(perms != null){
fs.setPermission(dbPath, perms);
}
if(null != grp){
fs.setOwner(dbPath, null, grp);
}
return 0;
} catch (Exception e){
ss.err.println(String.format("Failed to set permissions and/or group on DB: <%s> %s", dbName, e.getMessage()));
try {
Hive.get().dropDatabase(dbName);
} catch (Exception e1) {
ss.err.println(String.format("Failed to drop DB <%s> after failing to set permissions/group on it. %s", dbName, e1.getMessage()));
}
return 1;
}
}
}
}
}