| package org.apache.storm.beam.translation; |
| |
| import org.apache.beam.sdk.transforms.AppliedPTransform; |
| import org.apache.beam.sdk.transforms.DoFn; |
| import org.apache.beam.sdk.transforms.ParDo; |
| import org.apache.beam.sdk.util.WindowingStrategy; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.PValue; |
| import org.apache.storm.beam.translation.runtime.DoFnBolt; |
| import org.apache.storm.beam.translation.util.DefaultSideInputReader; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Translates a ParDo.Bound to a Storm DoFnBolt |
| */ |
| public class ParDoBoundTranslator<InputT, OutputT> implements |
| TransformTranslator<ParDo.Bound<InputT, OutputT>> { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(ParDoBoundTranslator.class); |
| |
| @Override |
| public void translateNode(ParDo.Bound<InputT, OutputT> transform, TranslationContext context) { |
| DoFn<InputT, OutputT> doFn = transform.getFn(); |
| PCollection<OutputT> output = context.getOutput(); |
| WindowingStrategy<?, ?> windowingStrategy = output.getWindowingStrategy(); |
| |
| DoFnBolt<InputT, OutputT> bolt = new DoFnBolt<>(context.getOptions(), doFn, |
| windowingStrategy, new DefaultSideInputReader()); |
| |
| PValue pvFrom = (PValue)context.getCurrentTransform().getInput(); |
| String from = baseName(pvFrom.getName()); |
| if(context.isGBKActive()){ |
| from = context.completeGBK(); |
| } |
| LOG.info(baseName(pvFrom.getName())); |
| |
| PValue pvTo = (PValue)context.getCurrentTransform().getOutput(); |
| LOG.info(baseName(pvTo.getName())); |
| String to = baseName(pvTo.getName()); |
| |
| TranslationContext.Stream stream = new TranslationContext.Stream(from, to, new TranslationContext.Grouping(TranslationContext.Grouping.Type.SHUFFLE)); |
| |
| context.addStream(stream); |
| context.addBolt(baseName(pvTo.getName()), bolt); |
| } |
| |
| private static String baseName(String str){ |
| return str.substring(0, str.lastIndexOf(".")); |
| } |
| } |