/
PageUtils.java
59 lines (51 loc) · 1.96 KB
/
PageUtils.java
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/*
* 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.prestosql.operator;
import io.prestosql.spi.Page;
import io.prestosql.spi.block.Block;
import io.prestosql.spi.block.LazyBlock;
import java.util.function.LongConsumer;
public final class PageUtils
{
private PageUtils() {}
public static Page recordMaterializedBytes(Page page, LongConsumer sizeInBytesConsumer)
{
// account processed bytes from lazy blocks only when they are loaded
Block[] blocks = new Block[page.getChannelCount()];
long loadedBlocksSizeInBytes = 0;
boolean allBlocksLoaded = true;
for (int i = 0; i < page.getChannelCount(); ++i) {
Block block = page.getBlock(i);
if (block.isLoaded()) {
loadedBlocksSizeInBytes += block.getSizeInBytes();
blocks[i] = block;
}
else {
blocks[i] = new LazyBlock(page.getPositionCount(), lazyBlock -> {
Block loadedBlock = block.getLoadedBlock();
sizeInBytesConsumer.accept(loadedBlock.getSizeInBytes());
lazyBlock.setBlock(loadedBlock);
});
allBlocksLoaded = false;
}
}
if (loadedBlocksSizeInBytes > 0) {
sizeInBytesConsumer.accept(loadedBlocksSizeInBytes);
}
if (allBlocksLoaded) {
return page;
}
return new Page(page.getPositionCount(), blocks);
}
}