Examples with LocalExchange com.facebook.presto.operator.exchange.LocalExchange used on opensource projects

Example 1 with LocalExchange

use of com.facebook.presto.operator.exchange.LocalExchange in project presto by prestodb.

the class TestHashJoinOperator method buildHash.

private static LookupSourceFactory buildHash(boolean parallelBuild, TaskContext taskContext, List<Integer> hashChannels, RowPagesBuilder buildPages, Optional<InternalJoinFilterFunction> filterFunction) {
    Optional<JoinFilterFunctionFactory> filterFunctionFactory = filterFunction.map(function -> ((session, addresses, channels) -> new StandardJoinFilterFunction(function, addresses, channels)));
    int partitionCount = parallelBuild ? PARTITION_COUNT : 1;
    LocalExchange localExchange = new LocalExchange(FIXED_HASH_DISTRIBUTION, partitionCount, buildPages.getTypes(), hashChannels, buildPages.getHashChannel());
    LocalExchangeSinkFactory sinkFactory = localExchange.createSinkFactory();
    sinkFactory.noMoreSinkFactories();
    // collect input data into the partitioned exchange
    DriverContext collectDriverContext = taskContext.addPipelineContext(0, true, true).addDriverContext();
    ValuesOperatorFactory valuesOperatorFactory = new ValuesOperatorFactory(0, new PlanNodeId("values"), buildPages.getTypes(), buildPages.build());
    LocalExchangeSinkOperatorFactory sinkOperatorFactory = new LocalExchangeSinkOperatorFactory(1, new PlanNodeId("sink"), sinkFactory, Function.identity());
    Driver driver = new Driver(collectDriverContext, valuesOperatorFactory.createOperator(collectDriverContext), sinkOperatorFactory.createOperator(collectDriverContext));
    valuesOperatorFactory.close();
    sinkOperatorFactory.close();
    while (!driver.isFinished()) {
        driver.process();
    }
    // build hash tables
    LocalExchangeSourceOperatorFactory sourceOperatorFactory = new LocalExchangeSourceOperatorFactory(0, new PlanNodeId("source"), localExchange);
    HashBuilderOperatorFactory buildOperatorFactory = new HashBuilderOperatorFactory(1, new PlanNodeId("build"), buildPages.getTypes(), rangeList(buildPages.getTypes().size()), ImmutableMap.of(), hashChannels, buildPages.getHashChannel(), false, filterFunctionFactory, 100, partitionCount, new PagesIndex.TestingFactory());
    PipelineContext buildPipeline = taskContext.addPipelineContext(1, true, true);
    Driver[] buildDrivers = new Driver[partitionCount];
    for (int i = 0; i < partitionCount; i++) {
        DriverContext buildDriverContext = buildPipeline.addDriverContext();
        buildDrivers[i] = new Driver(buildDriverContext, sourceOperatorFactory.createOperator(buildDriverContext), buildOperatorFactory.createOperator(buildDriverContext));
    }
    while (!buildOperatorFactory.getLookupSourceFactory().createLookupSource().isDone()) {
        for (Driver buildDriver : buildDrivers) {
            buildDriver.process();
        }
    }
    return buildOperatorFactory.getLookupSourceFactory();
}