/*
* 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.operator.exchange;
import com.facebook.presto.spi.Page;
import com.google.common.collect.ImmutableList;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.LongConsumer;
import static java.util.Objects.requireNonNull;
class BroadcastExchanger
implements Consumer<Page>
{
private final List<Consumer<PageReference>> buffers;
private final LongConsumer memoryTracker;
public BroadcastExchanger(List<Consumer<PageReference>> buffers, LongConsumer memoryTracker)
{
this.buffers = ImmutableList.copyOf(requireNonNull(buffers, "buffers is null"));
this.memoryTracker = requireNonNull(memoryTracker, "memoryTracker is null");
}
@Override
public void accept(Page page)
{
memoryTracker.accept(page.getRetainedSizeInBytes());
PageReference pageReference = new PageReference(page, buffers.size(), () -> memoryTracker.accept(-page.getRetainedSizeInBytes()));
for (Consumer<PageReference> buffer : buffers) {
buffer.accept(pageReference);
}
}
}