org.apache.hadoop.hive.ql.parse.repl.load.message.CommitTxnHandler Maven / Gradle / Ivy

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/*
 * 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.hadoop.hive.ql.parse.repl.load.message;

import org.apache.hadoop.hive.metastore.messaging.CommitTxnMessage;
import org.apache.hadoop.hive.ql.plan.ReplTxnWork;
import org.apache.hadoop.hive.ql.exec.Task;
import org.apache.hadoop.hive.ql.exec.TaskFactory;
import org.apache.hadoop.hive.ql.io.AcidUtils;
import org.apache.hadoop.hive.ql.metadata.HiveUtils;
import org.apache.hadoop.hive.ql.parse.SemanticException;
import java.io.Serializable;
import java.util.Collections;
import java.util.List;

/**
 * CommitTxnHandler
 * Target(Load) side handler for commit transaction event.
 */
public class CommitTxnHandler extends AbstractMessageHandler {
  @Override
  public List> handle(Context context)
      throws SemanticException {
    if (!AcidUtils.isAcidEnabled(context.hiveConf)) {
      context.log.error("Cannot load transaction events as acid is not enabled");
      throw new SemanticException("Cannot load transaction events as acid is not enabled");
    }

    CommitTxnMessage msg = deserializer.getCommitTxnMessage(context.dmd.getPayload());
    Task commitTxnTask = TaskFactory.get(
        new ReplTxnWork(HiveUtils.getReplPolicy(context.dbName, context.tableName), context.dbName, context.tableName,
              msg.getTxnId(), ReplTxnWork.OperationType.REPL_COMMIT_TXN, context.eventOnlyReplicationSpec()),
        context.hiveConf
    );
    updatedMetadata.set(context.dmd.getEventTo().toString(), context.dbName, context.tableName, null);
    context.log.debug("Added Commit txn task : {}", commitTxnTask.getId());
    return Collections.singletonList(commitTxnTask);
  }
}