@Test
public void materializedColShouldBeWritten() throws Exception {
File textFile = tmpDir.copyResourceFile("shakes.txt");
Pipeline pipeline = new MRPipeline(MRPipelineIT.class, tmpDir.getDefaultConfiguration());
PCollection<String> genericCollection = pipeline.readTextFile(textFile.getAbsolutePath());
pipeline.run();
PCollection<String> filter =
genericCollection.filter("Filtering data", FilterFns.<String>ACCEPT_ALL());
filter.materialize();
pipeline.run();
File file = tmpDir.getFile("output.txt");
Target outFile = To.textFile(file.getAbsolutePath());
PCollection<String> write = filter.write(outFile);
write.materialize();
pipeline.run();
}
@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());
}