io.trino.execution.PartitionedSplitsInfo 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.execution;
import static com.google.common.base.MoreObjects.toStringHelper;
public final class PartitionedSplitsInfo
{
private static final PartitionedSplitsInfo NO_SPLITS_INFO = new PartitionedSplitsInfo(0, 0);
private final int count;
private final long weightSum;
private PartitionedSplitsInfo(int splitCount, long splitsWeightSum)
{
this.count = splitCount;
this.weightSum = splitsWeightSum;
}
public int getCount()
{
return count;
}
public long getWeightSum()
{
return weightSum;
}
@Override
public int hashCode()
{
return (count * 31) + Long.hashCode(weightSum);
}
@Override
public boolean equals(Object other)
{
if (!(other instanceof PartitionedSplitsInfo otherInfo)) {
return false;
}
return this == otherInfo || (this.count == otherInfo.count && this.weightSum == otherInfo.weightSum);
}
@Override
public String toString()
{
return toStringHelper(this)
.add("count", count)
.add("weightSum", weightSum)
.toString();
}
public static PartitionedSplitsInfo forSplitCountAndWeightSum(int splitCount, long weightSum)
{
// Avoid allocating for the "no splits" case, also mask potential race condition between
// count and weight updates that might yield a positive weight with a count of 0
return splitCount == 0 ? NO_SPLITS_INFO : new PartitionedSplitsInfo(splitCount, weightSum);
}
public static PartitionedSplitsInfo forZeroSplits()
{
return NO_SPLITS_INFO;
}
}