Examples with CombinerFactory com.hazelcast.mapreduce.CombinerFactory used on opensource projects

Example 6 with CombinerFactory

use of com.hazelcast.mapreduce.CombinerFactory in project hazelcast by hazelcast.

the class ClientMapProxy method aggregate.

@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.fromMap(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);
    }
}