Examples with OutputChannel com.tdunning.plume.local.lazy.MSCR.OutputChannel used on opensource projects

Example 1 with OutputChannel

use of com.tdunning.plume.local.lazy.MSCR.OutputChannel in project Plume by tdunning.

the class MSCRReducer method reduce.

@SuppressWarnings("unchecked")
protected void reduce(final PlumeObject arg0, java.lang.Iterable<PlumeObject> values, Reducer<PlumeObject, PlumeObject, NullWritable, NullWritable>.Context<PlumeObject, PlumeObject, NullWritable, NullWritable> arg2) throws IOException, InterruptedException {
    PCollection col = mscr.getChannelByNumber().get(arg0.sourceId);
    OutputChannel oC = mscr.getOutputChannels().get(col);
    if (oC.reducer != null) {
        // apply reducer
        ParallelDo pDo = oC.reducer;
        // TODO how to check / report this
        DoFn reducer = pDo.getFunction();
        List<WritableComparable> vals = Lists.newArrayList();
        for (PlumeObject val : values) {
            vals.add(val.obj);
        }
        reducer.process(Pair.create(arg0.obj, vals), new EmitFn() {

            @Override
            public void emit(Object v) {
                try {
                    if (v instanceof Pair) {
                        Pair p = (Pair) v;
                        mos.write(arg0.sourceId + "", p.getKey(), p.getValue());
                    } else {
                        mos.write(arg0.sourceId + "", NullWritable.get(), (WritableComparable) v);
                    }
                } catch (Exception e) {
                    // TODO How to report this
                    e.printStackTrace();
                }
            }
        });
    } else {
        // direct writing - write all key, value pairs
        for (PlumeObject val : values) {
            if (oC.output instanceof PTable) {
                mos.write(arg0.sourceId + "", arg0.obj, val.obj);
            } else {
                mos.write(arg0.sourceId + "", NullWritable.get(), val.obj);
            }
        }
    }
}

Example 2 with OutputChannel

use of com.tdunning.plume.local.lazy.MSCR.OutputChannel in project Plume by tdunning.

the class MSCRCombiner method reduce.

@SuppressWarnings("unchecked")
protected void reduce(final PlumeObject arg0, java.lang.Iterable<PlumeObject> values, Reducer<PlumeObject, PlumeObject, PlumeObject, PlumeObject>.Context<PlumeObject, PlumeObject, PlumeObject, PlumeObject> context) throws IOException, InterruptedException {
    PCollection col = mscr.getChannelByNumber().get(arg0.sourceId);
    OutputChannel oC = mscr.getOutputChannels().get(col);
    if (oC.combiner != null) {
        // Apply combiner function for this channel
        List<WritableComparable> vals = Lists.newArrayList();
        for (PlumeObject val : values) {
            vals.add(val.obj);
        }
        WritableComparable result = (WritableComparable) oC.combiner.getCombiner().combine(vals);
        context.write(arg0, new PlumeObject(result, arg0.sourceId));
    } else {
        // direct writing - write all key, value pairs
        for (PlumeObject val : values) {
            context.write(arg0, val);
        }
    }
}