Examples with PCollectionType com.tdunning.plume.types.PCollectionType used on opensource projects

Example 1 with PCollectionType

use of com.tdunning.plume.types.PCollectionType in project Plume by tdunning.

the class MSCRMapper method map.

@SuppressWarnings("unchecked")
protected void map(WritableComparable key, WritableComparable value, final Mapper<WritableComparable, WritableComparable, PlumeObject, PlumeObject>.Context<WritableComparable, WritableComparable, PlumeObject, PlumeObject> context) throws IOException, InterruptedException {
    LazyCollection<?> l = null;
    FileSplit fS = FileInputSplitWrapper.getFileInputSplit(context);
    // Get LazyCollection for this input (according to FileSplit)
    for (PCollection<?> input : mscr.getInputs()) {
        LazyCollection<?> thisL = (LazyCollection<?>) input;
        if (thisL.getFile() == null) {
            // Convention for intermediate results
            thisL.setFile(tmpFolder + "/" + thisL.getPlumeId());
        }
        if (fS.getPath().toString().startsWith(thisL.getFile()) || fS.getPath().toString().startsWith("file:" + thisL.getFile())) {
            l = thisL;
            break;
        }
    }
    if (l == null) {
        throw new RuntimeException("Unable to match input split with any MSCR input");
    }
    // If this collection is a table -> process Pair, otherwise process value
    PCollectionType type = l.getType();
    Object toProcess = value;
    if (type instanceof PTableType) {
        toProcess = Pair.create(key, value);
    }
    for (DeferredOp op : l.getDownOps()) {
        if (op instanceof MultipleParallelDo) {
            MultipleParallelDo mPDo = ((MultipleParallelDo) op);
            for (Object entry : mPDo.getDests().entrySet()) {
                Map.Entry<PCollection, DoFn> en = (Map.Entry<PCollection, DoFn>) entry;
                LazyCollection<?> lCol = (LazyCollection<?>) en.getKey();
                DeferredOp childOp = null;
                if (lCol.getDownOps() != null && lCol.getDownOps().size() > 0) {
                    childOp = lCol.getDownOps().get(0);
                }
                final Integer channel;
                if (childOp != null && childOp instanceof Flatten) {
                    channel = mscr.getNumberedChannels().get(((Flatten) childOp).getDest());
                } else if (childOp != null && childOp instanceof GroupByKey) {
                    channel = mscr.getNumberedChannels().get(((GroupByKey) childOp).getOrigin());
                } else {
                    // bypass channel?
                    channel = mscr.getNumberedChannels().get(en.getKey());
                }
                if (channel == null) {
                    // This is not for this MSCR - just skip it
                    return;
                }
                // Call parallelDo function
                en.getValue().process(toProcess, new EmitFn() {

                    @Override
                    public void emit(Object v) {
                        try {
                            if (v instanceof Pair) {
                                Pair p = (Pair) v;
                                context.write(new PlumeObject((WritableComparable) p.getKey(), channel), new PlumeObject((WritableComparable) p.getValue(), channel));
                            } else {
                                context.write(new PlumeObject((WritableComparable) v, channel), new PlumeObject((WritableComparable) v, channel));
                            }
                        } catch (Exception e) {
                            // TODO How to report this
                            e.printStackTrace();
                        }
                    }
                });
            }
        } else {
            if (op instanceof Flatten) {
                l = (LazyCollection) ((Flatten) op).getDest();
            }
            int channel = mscr.getNumberedChannels().get(l);
            if (toProcess instanceof Pair) {
                context.write(new PlumeObject(key, channel), new PlumeObject(value, channel));
            } else {
                context.write(new PlumeObject(value, channel), new PlumeObject(value, channel));
            }
        }
    }
}