/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.oozie.action.hadoop;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map.Entry;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hive.hcatalog.api.ConnectionFailureException;
import org.apache.hive.hcatalog.api.HCatClient;
import org.apache.hive.hcatalog.common.HCatException;
import org.apache.oozie.util.HCatURI;
public class HCatLauncherURIHandler implements LauncherURIHandler {
private static List<Class<?>> classesToShip = new ArrayList<Class<?>>();
static {
classesToShip.add(HCatURI.class);
}
@Override
public boolean create(URI uri, Configuration conf) throws LauncherException {
throw new UnsupportedOperationException("Creation of partition is not supported for " + uri);
}
@Override
public boolean delete(URI uri, Configuration conf) throws LauncherException {
HCatClient client = getHCatClient(uri, conf);
try {
HCatURI hcatURI = new HCatURI(uri.toString());
client.dropPartitions(hcatURI.getDb(), hcatURI.getTable(), hcatURI.getPartitionMap(), true);
System.out.println("Dropped partitions for " + uri);
return true;
}
catch (ConnectionFailureException e) {
throw new LauncherException("Error trying to drop " + uri, e);
}
catch (HCatException e) {
throw new LauncherException("Error trying to drop " + uri, e);
}
catch (URISyntaxException e) {
throw new LauncherException("Error trying to drop " + uri, e);
}
finally {
closeQuietly(client);
}
}
private HCatClient getHCatClient(URI uri, Configuration conf) throws LauncherException {
// Do not use the constructor public HiveConf(Configuration other, Class<?> cls)
// It overwrites the values in conf with default values
final HiveConf hiveConf = new HiveConf();
for (Entry<String, String> entry : conf) {
hiveConf.set(entry.getKey(), entry.getValue());
}
String serverURI = getMetastoreConnectURI(uri);
if (!serverURI.equals("")) {
hiveConf.set("hive.metastore.local", "false");
}
hiveConf.set(HiveConf.ConfVars.METASTOREURIS.varname, serverURI);
try {
System.out.println("Creating HCatClient for user=" + UserGroupInformation.getCurrentUser() + " and server="
+ serverURI);
// Delegation token fetched from metastore has new Text() as service and
// HiveMetastoreClient looks for the same if not overriden by hive.metastore.token.signature
// We are good as long as HCatCredentialHelper does not change the service of the token.
return HCatClient.create(hiveConf);
}
catch (HCatException e) {
throw new LauncherException("Error trying to connect to " + serverURI, e);
}
catch (IOException e) {
throw new LauncherException("Error trying to connect to " + serverURI, e);
}
}
private String getMetastoreConnectURI(URI uri) {
String metastoreURI;
// For unit tests
if (uri.getAuthority().equals("unittest-local")) {
metastoreURI = "";
}
else {
// Hardcoding hcat to thrift mapping till support for webhcat(templeton)
// is added
metastoreURI = "thrift://" + uri.getAuthority();
}
return metastoreURI;
}
private void closeQuietly(HCatClient client) {
if (client != null) {
try {
client.close();
}
catch (Exception ignore) {
System.err.println("Error closing hcat client");
ignore.printStackTrace(System.err);
}
}
}
@Override
public List<Class<?>> getClassesForLauncher() {
return classesToShip;
}
}