java – 级联 – 合并2个聚合

我需要通过o,f来汇总记录,并将每组的i和c相加.

例如：

100,200,300,5,1

100,6,2

101,201,301,20,5

101,21,6

应该产量：

100,11,3

101,41,11

我无法理解如何合并我拥有的每个实例(我可以在同一时间聚合两个字段吗？).

你有什么主意吗？

Yosi

public class CascMain {

public static void main(String[] args){

    Scheme sourceScheme = new TextLine(new Fields("line"));
    Tap source = new Lfs(sourceScheme,"/tmp/casc/group.csv");

    Scheme sinkScheme = new TextDelimited(new Fields("o","a","f","ti","tc"),",");
    Tap sink = new Lfs(sinkScheme,"/tmp/casc/output/",SinkMode.REPLACE);

    Pipe assembly = new Pipe("agg-pipe");

    Function function = new RegexSplitter(new Fields("o","i","c"),");
    assembly = new Each(assembly,new Fields("line"),function);

    Pipe groupAssembly = new GroupBy("group",assembly,new Fields("o","f"));

    Sum impSum = new Sum(new Fields("ti"));
    Pipe i = new Every(groupAssembly,new Fields("i"),impSum);

    Sum clickSum = new Sum(new Fields("tc"));
    Pipe c = new Every(groupAssembly,new Fields("c"),clickSum);

    // WHAT SHOULD I DO HERE

    Properties properties = new Properties();
    FlowConnector.setApplicationJarClass(properties,CascMain.class);

    FlowConnector flowConnector = new FlowConnector(properties);
    Flow flow = flowConnector.connect("agg",source,sink,assembly);
    flow.complete();

}

}