/*
* Licensed 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 com.facebook.presto.hive;
import com.facebook.presto.spi.connector.ConnectorMetadata;
import com.facebook.presto.spi.connector.ConnectorTransactionHandle;
import javax.inject.Inject;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import static com.google.common.base.Preconditions.checkState;
public class HiveTransactionManager
{
private final ConcurrentMap<ConnectorTransactionHandle, ConnectorMetadata> transactions = new ConcurrentHashMap<>();
@Inject
public HiveTransactionManager()
{
}
public ConnectorMetadata get(ConnectorTransactionHandle transactionHandle)
{
return transactions.get(transactionHandle);
}
public ConnectorMetadata remove(ConnectorTransactionHandle transactionHandle)
{
return transactions.remove(transactionHandle);
}
public void put(ConnectorTransactionHandle transactionHandle, ConnectorMetadata metadata)
{
ConnectorMetadata previousValue = transactions.putIfAbsent(transactionHandle, metadata);
checkState(previousValue == null);
}
}