@Override public void updateState(MapState map, List<TridentTuple> tuples, TridentCollector collector) { Map<List<Object>, List<TridentTuple>> grouped = new HashMap<>(); for (TridentTuple t : tuples) { List<Object> group = _groupFactory.create(t); List<TridentTuple> groupTuples = grouped.get(group); if (groupTuples == null) { groupTuples = new ArrayList<>(); grouped.put(group, groupTuples); } groupTuples.add(_inputFactory.create(t)); } List<List<Object>> uniqueGroups = new ArrayList<>(grouped.keySet()); List<ValueUpdater> updaters = new ArrayList<>(uniqueGroups.size()); for (List<Object> group : uniqueGroups) { updaters.add(new ReducerValueUpdater(_agg, grouped.get(group))); } List<Object> results = map.multiUpdate(uniqueGroups, updaters); for (int i = 0; i < uniqueGroups.size(); i++) { List<Object> group = uniqueGroups.get(i); Object result = results.get(i); collector.emit(_factory.create(new List[]{ group, new Values(result) })); } }
@Override public void updateState(Snapshottable state, List<TridentTuple> tuples, TridentCollector collector) { Object newVal = state.update(new ReducerValueUpdater(_agg, tuples)); collector.emit(new Values(newVal)); }
@Override public void updateState(MapState map, List<TridentTuple> tuples, TridentCollector collector) { Map<List<Object>, List<TridentTuple>> grouped = new HashMap<>(); for(TridentTuple t: tuples) { List<Object> group = _groupFactory.create(t); List<TridentTuple> groupTuples = grouped.get(group); if(groupTuples==null) { groupTuples = new ArrayList<>(); grouped.put(group, groupTuples); } groupTuples.add(_inputFactory.create(t)); } List<List<Object>> uniqueGroups = new ArrayList<>(grouped.keySet()); List<ValueUpdater> updaters = new ArrayList<>(uniqueGroups.size()); for(List<Object> group: uniqueGroups) { updaters.add(new ReducerValueUpdater(_agg, grouped.get(group))); } List<Object> results = map.multiUpdate(uniqueGroups, updaters); for(int i=0; i<uniqueGroups.size(); i++) { List<Object> group = uniqueGroups.get(i); Object result = results.get(i); collector.emit(_factory.create(new List[] {group, new Values(result) })); } }
@Override public void updateState(Snapshottable state, List<TridentTuple> tuples, TridentCollector collector) { Object newVal = state.update(new ReducerValueUpdater(_agg, tuples)); collector.emit(new Values(newVal)); }