diqiu50 commented on code in PR #9416: URL: https://github.com/apache/gravitino/pull/9416#discussion_r2602772343
########## catalogs/hive-metastore-common/src/main/java/org/apache/gravitino/hive/client/HiveClientFactory.java: ########## @@ -0,0 +1,192 @@ +/* + * 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.gravitino.hive.client; + +import static org.apache.gravitino.catalog.hive.HiveConstants.HIVE_METASTORE_URIS; +import static org.apache.gravitino.hive.client.HiveClientClassLoader.HiveVersion.HIVE2; +import static org.apache.gravitino.hive.client.HiveClientClassLoader.HiveVersion.HIVE3; +import static org.apache.gravitino.hive.client.Util.buildConfigurationFromProperties; + +import com.google.common.base.Preconditions; +import java.lang.reflect.Constructor; +import java.lang.reflect.Method; +import java.util.Properties; +import org.apache.gravitino.exceptions.GravitinoRuntimeException; +import org.apache.gravitino.utils.PrincipalUtils; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.security.UserGroupInformation; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public final class HiveClientFactory { + private static final Logger LOG = LoggerFactory.getLogger(HiveClientFactory.class); + + // Remember which Hive backend version worked successfully for this factory. + private volatile HiveClientClassLoader.HiveVersion backendVersion; Review Comment: The instance of HiveClientFactory may be either for Hive2 or Hive3. One HiveCatalogOperation instance have it own HiveClientFactory. It can call createHiveClient by multiple thread. using `volatile` and lock to avoid creating more class loader in the instance -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
