io.trino.plugin.hudi.HudiSplitManager Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of trino-hudi Show documentation
Trino - Hudi connector
There is a newer version: 465
/*
 * 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;

import com.google.common.collect.ImmutableList;
import com.google.inject.Inject;
import io.trino.filesystem.TrinoFileSystemFactory;
import io.trino.metastore.HiveMetastore;
import io.trino.metastore.Table;
import io.trino.plugin.base.classloader.ClassLoaderSafeConnectorSplitSource;
import io.trino.plugin.hive.HiveColumnHandle;
import io.trino.plugin.hive.HiveTransactionHandle;
import io.trino.spi.connector.ConnectorSession;
import io.trino.spi.connector.ConnectorSplitManager;
import io.trino.spi.connector.ConnectorSplitSource;
import io.trino.spi.connector.ConnectorTableHandle;
import io.trino.spi.connector.ConnectorTransactionHandle;
import io.trino.spi.connector.Constraint;
import io.trino.spi.connector.DynamicFilter;
import io.trino.spi.connector.TableNotFoundException;
import io.trino.spi.security.ConnectorIdentity;
import io.trino.spi.type.TypeManager;

import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ScheduledExecutorService;
import java.util.function.BiFunction;
import java.util.stream.Collectors;

import static com.google.common.collect.ImmutableMap.toImmutableMap;
import static io.trino.plugin.hive.metastore.MetastoreUtil.computePartitionKeyFilter;
import static io.trino.plugin.hive.util.HiveUtil.getPartitionKeyColumnHandles;
import static io.trino.plugin.hudi.HudiSessionProperties.getMaxOutstandingSplits;
import static io.trino.plugin.hudi.HudiSessionProperties.getMaxSplitsPerSecond;
import static io.trino.plugin.hudi.partition.HiveHudiPartitionInfo.NON_PARTITION;
import static io.trino.spi.connector.SchemaTableName.schemaTableName;
import static java.util.Objects.requireNonNull;
import static java.util.function.Function.identity;

public class HudiSplitManager
        implements ConnectorSplitManager
{
    private final TypeManager typeManager;
    private final BiFunction metastoreProvider;
    private final TrinoFileSystemFactory fileSystemFactory;
    private final ExecutorService executor;
    private final ScheduledExecutorService splitLoaderExecutorService;

    @Inject
    public HudiSplitManager(
            TypeManager typeManager,
            BiFunction metastoreProvider,
            @ForHudiSplitManager ExecutorService executor,
            TrinoFileSystemFactory fileSystemFactory,
            @ForHudiSplitSource ScheduledExecutorService splitLoaderExecutorService)
    {
        this.typeManager = requireNonNull(typeManager, "typeManager is null");
        this.metastoreProvider = requireNonNull(metastoreProvider, "metastoreProvider is null");
        this.executor = requireNonNull(executor, "executor is null");
        this.fileSystemFactory = requireNonNull(fileSystemFactory, "fileSystemFactory is null");
        this.splitLoaderExecutorService = requireNonNull(splitLoaderExecutorService, "splitLoaderExecutorService is null");
    }

    @Override
    public ConnectorSplitSource getSplits(
            ConnectorTransactionHandle transaction,
            ConnectorSession session,
            ConnectorTableHandle tableHandle,
            DynamicFilter dynamicFilter,
            Constraint constraint)
    {
        HudiTableHandle hudiTableHandle = (HudiTableHandle) tableHandle;
        HiveMetastore metastore = metastoreProvider.apply(session.getIdentity(), (HiveTransactionHandle) transaction);
        Table table = metastore.getTable(hudiTableHandle.getSchemaName(), hudiTableHandle.getTableName())
                .orElseThrow(() -> new TableNotFoundException(schemaTableName(hudiTableHandle.getSchemaName(), hudiTableHandle.getTableName())));

        List partitionColumns = getPartitionKeyColumnHandles(table, typeManager);
        Map partitionColumnHandles = partitionColumns.stream()
                .collect(toImmutableMap(HiveColumnHandle::getName, identity()));
        List partitions = getPartitions(metastore, hudiTableHandle, partitionColumns);

        HudiSplitSource splitSource = new HudiSplitSource(
                session,
                metastore,
                table,
                hudiTableHandle,
                fileSystemFactory,
                partitionColumnHandles,
                executor,
                splitLoaderExecutorService,
                getMaxSplitsPerSecond(session),
                getMaxOutstandingSplits(session),
                partitions);
        return new ClassLoaderSafeConnectorSplitSource(splitSource, HudiSplitManager.class.getClassLoader());
    }

    private static List getPartitions(HiveMetastore metastore, HudiTableHandle table, List partitionColumns)
    {
        if (partitionColumns.isEmpty()) {
            return ImmutableList.of(NON_PARTITION);
        }

        return metastore.getPartitionNamesByFilter(
                        table.getSchemaName(),
                        table.getTableName(),
                        partitionColumns.stream().map(HiveColumnHandle::getName).collect(Collectors.toList()),
                        computePartitionKeyFilter(partitionColumns, table.getPartitionPredicates()))
                .orElseThrow(() -> new TableNotFoundException(table.getSchemaTableName()));
    }
}