| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.storm.beam.translation; |
| |
| import org.apache.beam.sdk.transforms.windowing.FixedWindows; |
| import org.apache.beam.sdk.transforms.windowing.Window; |
| import org.apache.beam.sdk.values.PValue; |
| import org.apache.storm.beam.translation.runtime.WindowBolt; |
| import org.apache.storm.topology.base.BaseWindowedBolt; |
| import org.joda.time.Duration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Translates a Window.Bound node into a Storm WindowedBolt |
| * @param <T> |
| */ |
| public class WindowBoundTranslator<T> implements TransformTranslator<Window.Bound<T>> { |
| private static final Logger LOG = LoggerFactory.getLogger(WindowBoundTranslator.class); |
| |
| @Override |
| public void translateNode(Window.Bound<T> transform, TranslationContext context) { |
| if(transform.getWindowFn() instanceof FixedWindows){ |
| Duration size = ((FixedWindows) transform.getWindowFn()).getSize(); |
| |
| WindowBolt bolt = new WindowBolt(); |
| bolt.withTumblingWindow(WindowBolt.Duration.seconds((int)size.getStandardSeconds())); |
| |
| PValue from = (PValue)context.getCurrentTransform().getInput(); |
| LOG.info(baseName(from.getName())); |
| |
| PValue to = (PValue)context.getCurrentTransform().getOutput(); |
| LOG.info(baseName(to.getName())); |
| |
| TranslationContext.Stream stream = new TranslationContext.Stream(baseName(from.getName()), baseName(to.getName()), new TranslationContext.Grouping(TranslationContext.Grouping.Type.SHUFFLE)); |
| |
| context.addStream(stream); |
| context.addBolt(baseName(to.getName()), bolt); |
| |
| } else { |
| throw new UnsupportedOperationException("Currently only fixed windows are supported."); |
| } |
| } |
| |
| |
| private static String baseName(String str){ |
| return str.substring(0, str.lastIndexOf(".")); |
| } |
| } |