| /* |
| * 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.beam.runners.dataflow.worker.util; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.beam.runners.core.DoFnRunners.OutputManager; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.sdk.values.TupleTag; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.Lists; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.Maps; |
| |
| /** |
| * An implementation of {@code OutputManager} using simple lists, for testing and in-memory contexts |
| * such as the {@code DirectRunner}. |
| */ |
| public class ListOutputManager implements OutputManager { |
| |
| private Map<TupleTag<?>, List<WindowedValue<?>>> outputLists = Maps.newHashMap(); |
| |
| @Override |
| public <T> void output(TupleTag<T> tag, WindowedValue<T> output) { |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| List<WindowedValue<T>> outputList = (List) outputLists.get(tag); |
| |
| if (outputList == null) { |
| outputList = Lists.newArrayList(); |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| List<WindowedValue<?>> untypedList = (List) outputList; |
| outputLists.put(tag, untypedList); |
| } |
| |
| outputList.add(output); |
| } |
| |
| public <T> List<WindowedValue<T>> getOutput(TupleTag<T> tag) { |
| // Safe cast by design, inexpressible in Java without rawtypes |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| List<WindowedValue<T>> outputList = (List) outputLists.get(tag); |
| return (outputList != null) ? outputList : Collections.<WindowedValue<T>>emptyList(); |
| } |
| } |