Examples with AggregateOperation3 com.hazelcast.jet.aggregate.AggregateOperation3 used on opensource projects

Example 1 with AggregateOperation3

use of com.hazelcast.jet.aggregate.AggregateOperation3 in project hazelcast-jet-reference-manual by hazelcast.

the class ImplementAggregation method s2.

static void s2() {
    // tag::s2[]
    Pipeline p = Pipeline.create();
    BatchStage<PageVisit> pageVisit = p.drawFrom(Sources.list("pageVisit"));
    BatchStage<AddToCart> addToCart = p.drawFrom(Sources.list("addToCart"));
    BatchStage<Payment> payment = p.drawFrom(Sources.list("payment"));
    AggregateOperation3<PageVisit, AddToCart, Payment, LongAccumulator[], long[]> aggrOp = AggregateOperation.withCreate(() -> new LongAccumulator[] { new LongAccumulator(), new LongAccumulator(), new LongAccumulator() }).<PageVisit>andAccumulate0((accs, pv) -> accs[0].add(pv.loadTime())).<AddToCart>andAccumulate1((accs, atc) -> accs[1].add(atc.quantity())).<Payment>andAccumulate2((accs, pm) -> accs[2].add(pm.amount())).andCombine((accs1, accs2) -> {
        accs1[0].add(accs2[0]);
        accs1[1].add(accs2[1]);
        accs1[2].add(accs2[2]);
    }).andFinish(accs -> new long[] { accs[0].get(), accs[1].get(), accs[2].get() });
    BatchStage<Entry<Integer, long[]>> coGrouped = pageVisit.groupingKey(PageVisit::userId).aggregate3(addToCart.groupingKey(AddToCart::userId), payment.groupingKey(Payment::userId), aggrOp);
// end::s2[]
}