private void runMapsideJoin(Pipeline pipeline, boolean inMemory, boolean materialize) {
PTable<Integer, String> customerTable = readTable(pipeline, "customers.txt");
PTable<Integer, String> orderTable = readTable(pipeline, "orders.txt");
JoinStrategy<Integer, String, String> mapsideJoin =
new MapsideJoinStrategy<Integer, String, String>(materialize);
PTable<Integer, String> custOrders =
mapsideJoin
.join(customerTable, orderTable, JoinType.INNER_JOIN)
.mapValues("concat", new ConcatValuesFn(), Writables.strings());
PTable<Integer, String> ORDER_TABLE =
orderTable.mapValues(new CapOrdersFn(), orderTable.getValueType());
PTable<Integer, Pair<String, String>> joined =
mapsideJoin.join(custOrders, ORDER_TABLE, JoinType.INNER_JOIN);
List<Pair<Integer, Pair<String, String>>> expectedJoinResult = Lists.newArrayList();
expectedJoinResult.add(Pair.of(111, Pair.of("[John Doe,Corn flakes]", "CORN FLAKES")));
expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet paper]", "TOILET PAPER")));
expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet paper]", "TOILET PLUNGER")));
expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet plunger]", "TOILET PAPER")));
expectedJoinResult.add(Pair.of(222, Pair.of("[Jane Doe,Toilet plunger]", "TOILET PLUNGER")));
expectedJoinResult.add(Pair.of(333, Pair.of("[Someone Else,Toilet brush]", "TOILET BRUSH")));
Iterable<Pair<Integer, Pair<String, String>>> iter = joined.materialize();
PipelineResult res = pipeline.run();
if (!inMemory) {
assertEquals(materialize ? 2 : 1, res.getStageResults().size());
}
List<Pair<Integer, Pair<String, String>>> joinedResultList = Lists.newArrayList(iter);
Collections.sort(joinedResultList);
assertEquals(expectedJoinResult, joinedResultList);
}
@Test
public void testMapsideJoin_RightSideIsEmpty() throws IOException {
MRPipeline pipeline =
new MRPipeline(MapsideJoinStrategyIT.class, tmpDir.getDefaultConfiguration());
PTable<Integer, String> customerTable = readTable(pipeline, "customers.txt");
PTable<Integer, String> orderTable = readTable(pipeline, "orders.txt");
PTable<Integer, String> filteredOrderTable =
orderTable.parallelDo(
FilterFns.<Pair<Integer, String>>REJECT_ALL(), orderTable.getPTableType());
JoinStrategy<Integer, String, String> mapsideJoin =
new MapsideJoinStrategy<Integer, String, String>();
PTable<Integer, Pair<String, String>> joined =
mapsideJoin.join(customerTable, filteredOrderTable, JoinType.INNER_JOIN);
List<Pair<Integer, Pair<String, String>>> materializedJoin =
Lists.newArrayList(joined.materialize());
assertTrue(materializedJoin.isEmpty());
}