ThriftPageSourceProvider.java
/*
* 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.connector.thrift;
import com.facebook.drift.client.DriftClient;
import com.facebook.presto.spi.ColumnHandle;
import com.facebook.presto.spi.ConnectorPageSource;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.ConnectorSplit;
import com.facebook.presto.spi.SplitContext;
import com.facebook.presto.spi.connector.ConnectorPageSourceProvider;
import com.facebook.presto.spi.connector.ConnectorTransactionHandle;
import com.facebook.presto.thrift.api.connector.PrestoThriftService;
import javax.inject.Inject;
import java.util.List;
import static java.util.Objects.requireNonNull;
public class ThriftPageSourceProvider
implements ConnectorPageSourceProvider
{
private final DriftClient<PrestoThriftService> client;
private final ThriftHeaderProvider thriftHeaderProvider;
private final long maxBytesPerResponse;
private final ThriftConnectorStats stats;
@Inject
public ThriftPageSourceProvider(DriftClient<PrestoThriftService> client, ThriftHeaderProvider thriftHeaderProvider, ThriftConnectorStats stats, ThriftConnectorConfig config)
{
this.client = requireNonNull(client, "client is null");
this.thriftHeaderProvider = requireNonNull(thriftHeaderProvider, "thriftHeaderFactor is null");
this.maxBytesPerResponse = requireNonNull(config, "config is null").getMaxResponseSize().toBytes();
this.stats = requireNonNull(stats, "stats is null");
}
@Override
public ConnectorPageSource createPageSource(
ConnectorTransactionHandle transactionHandle,
ConnectorSession session,
ConnectorSplit split,
List<ColumnHandle> columns,
SplitContext splitContext)
{
return new ThriftPageSource(client, thriftHeaderProvider.getHeaders(session), (ThriftConnectorSplit) split, columns, stats, maxBytesPerResponse);
}
}