io.druid.indexing.overlord.IndexerMetadataStorageAdapter.java Source code

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Here is the source code for io.druid.indexing.overlord.IndexerMetadataStorageAdapter.java

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets licenses this file
 * to you 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.druid.indexing.overlord;

import com.google.common.base.Preconditions;
import com.google.inject.Inject;
import io.druid.java.util.common.DateTimes;
import org.joda.time.DateTime;
import org.joda.time.Interval;

import java.util.Comparator;
import java.util.Optional;

public class IndexerMetadataStorageAdapter {
    private final TaskStorageQueryAdapter taskStorageQueryAdapter;
    private final IndexerMetadataStorageCoordinator indexerMetadataStorageCoordinator;

    @Inject
    public IndexerMetadataStorageAdapter(TaskStorageQueryAdapter taskStorageQueryAdapter,
            IndexerMetadataStorageCoordinator indexerMetadataStorageCoordinator) {
        this.taskStorageQueryAdapter = taskStorageQueryAdapter;
        this.indexerMetadataStorageCoordinator = indexerMetadataStorageCoordinator;
    }

    public int deletePendingSegments(String dataSource, Interval deleteInterval) {
        // Check the given interval overlaps the interval(minCreatedDateOfActiveTasks, MAX)
        final Optional<DateTime> minCreatedDateOfActiveTasks = taskStorageQueryAdapter.getActiveTasks().stream()
                .map(task -> Preconditions.checkNotNull(taskStorageQueryAdapter.getCreatedTime(task.getId()),
                        "Can't find the createdTime for task[%s]", task.getId()))
                .min(Comparator.naturalOrder());

        final Interval activeTaskInterval = new Interval(minCreatedDateOfActiveTasks.orElse(DateTimes.MAX),
                DateTimes.MAX);

        Preconditions.checkArgument(!deleteInterval.overlaps(activeTaskInterval),
                "Cannot delete pendingSegments because there is at least one active task created at %s",
                activeTaskInterval.getStart());

        return indexerMetadataStorageCoordinator.deletePendingSegments(dataSource, deleteInterval);
    }
}