io.trino.plugin.hudi.partition.HudiPartitionInfoLoader Maven / Gradle / Ivy

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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.trino.plugin.hudi.partition;

import io.airlift.concurrent.MoreFutures;
import io.trino.plugin.hive.HivePartitionKey;
import io.trino.plugin.hive.util.AsyncQueue;
import io.trino.plugin.hudi.HudiFileStatus;
import io.trino.plugin.hudi.query.HudiDirectoryLister;
import io.trino.plugin.hudi.split.HudiSplitFactory;
import io.trino.spi.connector.ConnectorSplit;

import java.util.Deque;
import java.util.List;
import java.util.Optional;

import static io.trino.plugin.hudi.partition.HiveHudiPartitionInfo.NON_PARTITION;

public class HudiPartitionInfoLoader
        implements Runnable
{
    private final HudiDirectoryLister hudiDirectoryLister;
    private final HudiSplitFactory hudiSplitFactory;
    private final AsyncQueue asyncQueue;
    private final Deque partitionQueue;

    private boolean isRunning;

    public HudiPartitionInfoLoader(
            HudiDirectoryLister hudiDirectoryLister,
            HudiSplitFactory hudiSplitFactory,
            AsyncQueue asyncQueue,
            Deque partitionQueue)
    {
        this.hudiDirectoryLister = hudiDirectoryLister;
        this.hudiSplitFactory = hudiSplitFactory;
        this.asyncQueue = asyncQueue;
        this.partitionQueue = partitionQueue;
        this.isRunning = true;
    }

    @Override
    public void run()
    {
        while (isRunning || !partitionQueue.isEmpty()) {
            String partitionName = partitionQueue.poll();

            if (partitionName != null) {
                generateSplitsFromPartition(partitionName);
            }
        }
    }

    private void generateSplitsFromPartition(String partitionName)
    {
        Optional partitionInfo = hudiDirectoryLister.getPartitionInfo(partitionName);
        partitionInfo.ifPresent(hudiPartitionInfo -> {
            if (hudiPartitionInfo.doesMatchPredicates() || partitionName.equals(NON_PARTITION)) {
                List partitionKeys = hudiPartitionInfo.getHivePartitionKeys();
                List partitionFiles = hudiDirectoryLister.listStatus(hudiPartitionInfo);
                partitionFiles.stream()
                        .flatMap(fileStatus -> hudiSplitFactory.createSplits(partitionKeys, fileStatus).stream())
                        .map(asyncQueue::offer)
                        .forEachOrdered(MoreFutures::getFutureValue);
            }
        });
    }

    public void stopRunning()
    {
        this.isRunning = false;
    }
}