io.trino.operator.exchange.PassthroughExchanger Maven / Gradle / Ivy
/*
* 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 io.trino.operator.exchange;
import com.google.common.util.concurrent.ListenableFuture;
import io.trino.spi.Page;
import static java.util.Objects.requireNonNull;
public class PassthroughExchanger
implements LocalExchanger
{
private final LocalExchangeSource localExchangeSource;
private final LocalExchangeMemoryManager bufferMemoryManager;
public PassthroughExchanger(LocalExchangeSource localExchangeSource, LocalExchangeMemoryManager bufferMemoryManager)
{
this.localExchangeSource = requireNonNull(localExchangeSource, "localExchangeSource is null");
this.bufferMemoryManager = requireNonNull(bufferMemoryManager, "bufferMemoryManager is null");
}
@Override
public void accept(Page page)
{
bufferMemoryManager.updateMemoryUsage(page.getRetainedSizeInBytes());
localExchangeSource.addPage(page);
}
@Override
public ListenableFuture waitForWriting()
{
return bufferMemoryManager.getNotFullFuture();
}
@Override
public void finish()
{
localExchangeSource.finish();
}
}