@Override
public <SuppliedValue, Result> Result aggregate(
Supplier<K, V, SuppliedValue> supplier,
Aggregation<K, SuppliedValue, Result> aggregation,
JobTracker jobTracker) {
try {
Preconditions.isNotNull(jobTracker, "jobTracker");
KeyValueSource<K, V> keyValueSource = KeyValueSource.fromMultiMap(this);
Job<K, V> job = jobTracker.newJob(keyValueSource);
Mapper mapper = aggregation.getMapper(supplier);
CombinerFactory combinerFactory = aggregation.getCombinerFactory();
ReducerFactory reducerFactory = aggregation.getReducerFactory();
Collator collator = aggregation.getCollator();
MappingJob mappingJob = job.mapper(mapper);
ReducingSubmittableJob reducingJob;
if (combinerFactory != null) {
reducingJob = mappingJob.combiner(combinerFactory).reducer(reducerFactory);
} else {
reducingJob = mappingJob.reducer(reducerFactory);
}
ICompletableFuture<Result> future = reducingJob.submit(collator);
return future.get();
} catch (Exception e) {
throw new HazelcastException(e);
}
}
@Test(timeout = 60000)
public void testMapReduceWithList() throws Exception {
Config config = buildConfig();
HazelcastInstance h1 = hazelcastFactory.newHazelcastInstance(config);
HazelcastInstance h2 = hazelcastFactory.newHazelcastInstance(config);
HazelcastInstance h3 = hazelcastFactory.newHazelcastInstance(config);
assertClusterSizeEventually(3, h1);
assertClusterSizeEventually(3, h2);
assertClusterSizeEventually(3, h3);
HazelcastInstance client = hazelcastFactory.newHazelcastClient();
int expectedResult = 0;
IList<Integer> list = h1.getList("default");
for (int o = 0; o < 100; o++) {
list.add(o);
expectedResult += o;
}
JobTracker jobTracker = client.getJobTracker("default");
Job<String, Integer> job = jobTracker.newJob(KeyValueSource.fromList(list));
ICompletableFuture<Map<String, Integer>> ICompletableFuture =
job.chunkSize(10)
.mapper(new ListSetMapReduceTest.ListSetMapper())
.combiner(new ListSetMapReduceTest.ListSetCombinerFactory())
.reducer(new ListSetMapReduceTest.ListSetReducerFactory())
.submit();
Map<String, Integer> result = ICompletableFuture.get();
assertEquals(1, result.size());
int count = 0;
for (Map.Entry<String, Integer> entry : result.entrySet()) {
assertEquals(list.getName(), entry.getKey());
assertEquals(expectedResult, (int) entry.getValue());
}
}