UnassignedSpecifyInstancesJob.java

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package org.apache.doris.nereids.trees.plans.distribute.worker.job;

import org.apache.doris.nereids.StatementContext;
import org.apache.doris.nereids.trees.plans.distribute.DistributeContext;
import org.apache.doris.nereids.trees.plans.distribute.NereidsSpecifyInstances;
import org.apache.doris.planner.ExchangeNode;
import org.apache.doris.planner.PlanFragment;
import org.apache.doris.planner.ScanNode;

import com.google.common.base.Preconditions;
import com.google.common.collect.ListMultimap;

import java.util.List;

/** UnassignedSpecifyInstancesJob */
public class UnassignedSpecifyInstancesJob extends AbstractUnassignedJob {
    private final NereidsSpecifyInstances<ScanSource> specifyInstances;

    public UnassignedSpecifyInstancesJob(
            StatementContext statementContext, PlanFragment fragment, List<ScanNode> scanNodes,
            ListMultimap<ExchangeNode, UnassignedJob> exchangeToChildJob) {
        super(statementContext, fragment, scanNodes, exchangeToChildJob);
        Preconditions.checkArgument(fragment.specifyInstances.isPresent(),
                "Missing fragment specifyInstances");
        this.specifyInstances = fragment.specifyInstances.get();
    }

    @Override
    public List<AssignedJob> computeAssignedJobs(
            DistributeContext distributeContext, ListMultimap<ExchangeNode, AssignedJob> inputJobs) {
        return specifyInstances.buildAssignedJobs(this);
    }
}