io.trino.split.SplitSource 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.split;
import com.google.common.util.concurrent.ListenableFuture;
import io.trino.metadata.Split;
import io.trino.spi.connector.CatalogHandle;
import java.io.Closeable;
import java.util.List;
import java.util.Optional;
import static java.util.Objects.requireNonNull;
public interface SplitSource
extends Closeable
{
CatalogHandle getCatalogHandle();
ListenableFuture getNextBatch(int maxSize);
@Override
void close();
boolean isFinished();
Optional> getTableExecuteSplitsInfo();
class SplitBatch
{
private final List splits;
private final boolean lastBatch;
public SplitBatch(List splits, boolean lastBatch)
{
this.splits = requireNonNull(splits, "splits is null");
this.lastBatch = lastBatch;
}
public List getSplits()
{
return splits;
}
/**
* Returns true if all splits for the requested driver group have been returned.
* In other hands, splits returned from this and all previous invocations of {@link #getNextBatch}
* form the complete set of splits in the requested driver group.
*/
public boolean isLastBatch()
{
return lastBatch;
}
}
}