private static JobTaskVertex createMapper(
JobGraph jobGraph,
int numSubTasks,
TypeSerializerFactory<?> inputSerializer,
TypeSerializerFactory<?> broadcastVarSerializer,
TypeSerializerFactory<?> outputSerializer,
TypeComparatorFactory<?> outputComparator) {
JobTaskVertex mapper =
JobGraphUtils.createTask(
IterationIntermediatePactTask.class,
"Map (Select nearest center)",
jobGraph,
numSubTasks,
numSubTasks);
TaskConfig intermediateConfig = new TaskConfig(mapper.getConfiguration());
intermediateConfig.setIterationId(ITERATION_ID);
intermediateConfig.setDriver(CollectorMapDriver.class);
intermediateConfig.setDriverStrategy(DriverStrategy.COLLECTOR_MAP);
intermediateConfig.addInputToGroup(0);
intermediateConfig.setInputSerializer(inputSerializer, 0);
intermediateConfig.setOutputSerializer(outputSerializer);
intermediateConfig.addOutputShipStrategy(ShipStrategyType.PARTITION_HASH);
intermediateConfig.setOutputComparator(outputComparator, 0);
intermediateConfig.setBroadcastInputName("centers", 0);
intermediateConfig.addBroadcastInputToGroup(0);
intermediateConfig.setBroadcastInputSerializer(broadcastVarSerializer, 0);
// the udf
intermediateConfig.setStubWrapper(
new UserCodeObjectWrapper<SelectNearestCenter>(new SelectNearestCenter()));
return mapper;
}
