import storm.trident.operation.GroupedMultiReducer; //导入依赖的package包/类
public GroupedMultiReducerExecutor(GroupedMultiReducer reducer, List<Fields> groupFields, List<Fields> inputFields) {
    if(inputFields.size()!=groupFields.size()) {
        throw new IllegalArgumentException("Multireducer groupFields and inputFields must be the same size");
    }
    _groupFields = groupFields;
    _inputFields = inputFields;
    _reducer = reducer;
}
 

import storm.trident.operation.GroupedMultiReducer; //导入依赖的package包/类
public Stream multiReduce(List<Fields> inputFields, List<GroupedStream> groupedStreams, GroupedMultiReducer function, Fields outputFields) {
    List<Fields> fullInputFields = new ArrayList<Fields>();
    List<Stream> streams = new ArrayList<Stream>();
    List<Fields> fullGroupFields = new ArrayList<Fields>();
    for(int i=0; i<groupedStreams.size(); i++) {
        GroupedStream gs = groupedStreams.get(i);
        Fields groupFields = gs.getGroupFields();
        fullGroupFields.add(groupFields);
        streams.add(gs.toStream().partitionBy(groupFields));
        fullInputFields.add(TridentUtils.fieldsUnion(groupFields, inputFields.get(i)));
        
    }
    return multiReduce(fullInputFields, streams, new GroupedMultiReducerExecutor(function, fullGroupFields, inputFields), outputFields);
}
 

import storm.trident.operation.GroupedMultiReducer; //导入依赖的package包/类
public GroupedMultiReducerExecutor(GroupedMultiReducer reducer, List<Fields> groupFields, List<Fields> inputFields) {
    if (inputFields.size() != groupFields.size()) {
        throw new IllegalArgumentException("Multireducer groupFields and inputFields must be the same size");
    }
    _groupFields = groupFields;
    _inputFields = inputFields;
    _reducer = reducer;
}
 

import storm.trident.operation.GroupedMultiReducer; //导入依赖的package包/类
public Stream multiReduce(List<Fields> inputFields, List<GroupedStream> groupedStreams, GroupedMultiReducer function, Fields outputFields) {
    List<Fields> fullInputFields = new ArrayList<>();
    List<Stream> streams = new ArrayList<>();
    List<Fields> fullGroupFields = new ArrayList<>();
    for(int i=0; i<groupedStreams.size(); i++) {
        GroupedStream gs = groupedStreams.get(i);
        Fields groupFields = gs.getGroupFields();
        fullGroupFields.add(groupFields);
        streams.add(gs.toStream().partitionBy(groupFields));
        fullInputFields.add(TridentUtils.fieldsUnion(groupFields, inputFields.get(i)));
        
    }
    return multiReduce(fullInputFields, streams, new GroupedMultiReducerExecutor(function, fullGroupFields, inputFields), outputFields);
}