com.facebook.presto.atop.AtopSplitManager.java Source code

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Here is the source code for com.facebook.presto.atop.AtopSplitManager.java

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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 com.facebook.presto.atop;

import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.ConnectorSplit;
import com.facebook.presto.spi.ConnectorSplitSource;
import com.facebook.presto.spi.ConnectorTableLayoutHandle;
import com.facebook.presto.spi.FixedSplitSource;
import com.facebook.presto.spi.Node;
import com.facebook.presto.spi.NodeManager;
import com.facebook.presto.spi.connector.ConnectorSplitManager;
import com.facebook.presto.spi.connector.ConnectorTransactionHandle;
import com.facebook.presto.spi.predicate.Domain;
import com.facebook.presto.spi.predicate.Range;
import com.facebook.presto.spi.predicate.ValueSet;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;

import javax.inject.Inject;

import java.util.ArrayList;
import java.util.List;

import static com.facebook.presto.atop.Types.checkType;
import static com.facebook.presto.spi.type.TimestampType.TIMESTAMP;
import static java.util.Objects.requireNonNull;

public class AtopSplitManager implements ConnectorSplitManager {
    private final NodeManager nodeManager;
    private final AtopConnectorId connectorId;
    private final DateTimeZone timeZone;
    private final int maxHistoryDays;

    @Inject
    public AtopSplitManager(NodeManager nodeManager, AtopConnectorConfig config, AtopConnectorId connectorId) {
        this.nodeManager = requireNonNull(nodeManager, "nodeManager is null");
        this.connectorId = requireNonNull(connectorId, "connectorId is null");
        requireNonNull(config, "config is null");
        timeZone = config.getDateTimeZone();
        maxHistoryDays = config.getMaxHistoryDays();
    }

    @Override
    public ConnectorSplitSource getSplits(ConnectorTransactionHandle transactionHandle, ConnectorSession session,
            ConnectorTableLayoutHandle layoutHandle) {
        AtopTableLayoutHandle handle = checkType(layoutHandle, AtopTableLayoutHandle.class, "layoutHandle");

        AtopTableHandle table = handle.getTableHandle();

        List<ConnectorSplit> splits = new ArrayList<>();
        DateTime end = DateTime.now().withZone(timeZone);
        for (Node node : nodeManager.getActiveDatasourceNodes(connectorId.getId())) {
            DateTime start = end.minusDays(maxHistoryDays - 1).withTimeAtStartOfDay();
            while (start.isBefore(end)) {
                DateTime splitEnd = start.withTime(23, 59, 59, 999);
                Domain splitDomain = Domain.create(
                        ValueSet.ofRanges(
                                Range.range(TIMESTAMP, start.getMillis(), true, splitEnd.getMillis(), true)),
                        false);
                if (handle.getStartTimeConstraint().overlaps(splitDomain)
                        && handle.getEndTimeConstraint().overlaps(splitDomain)) {
                    splits.add(new AtopSplit(table.getTable(), node.getHostAndPort(), start));
                }
                start = start.plusDays(1).withTimeAtStartOfDay();
            }
        }

        return new FixedSplitSource(connectorId.getId(), splits);
    }
}