| /* |
| * 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; |
| |
| import org.apache.beam.runners.dataflow.worker.util.common.worker.ParDoFn; |
| import org.apache.beam.runners.dataflow.worker.util.common.worker.Receiver; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.sdk.values.KV; |
| import org.joda.time.Instant; |
| |
| /** |
| * A {@link ParDoFn} over per-key iterables that applies an underlying {@link ParDoFn} to the |
| * elements of an underlying iterable, then processes its timers. |
| * |
| * <p>Each input element must be a {@link KV} where the value is an iterable of {@link WindowedValue |
| * WindowedValues}. |
| */ |
| @SuppressWarnings({ |
| "nullness" // TODO(https://issues.apache.org/jira/browse/BEAM-10402) |
| }) |
| class BatchModeUngroupingParDoFn<K, V> implements ParDoFn { |
| |
| private final ParDoFn underlyingParDoFn; |
| private final BatchModeExecutionContext.StepContext stepContext; |
| |
| BatchModeUngroupingParDoFn( |
| BatchModeExecutionContext.StepContext stepContext, ParDoFn underlyingParDoFn) { |
| this.underlyingParDoFn = underlyingParDoFn; |
| this.stepContext = stepContext; |
| } |
| |
| @Override |
| public void startBundle(Receiver... receivers) throws Exception { |
| underlyingParDoFn.startBundle(receivers); |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public void processElement(Object untypedElem) throws Exception { |
| WindowedValue<?> windowedValue = (WindowedValue<?>) untypedElem; |
| |
| KV<K, Iterable<KV<Instant, WindowedValue<V>>>> gbkElem = |
| (KV<K, Iterable<KV<Instant, WindowedValue<V>>>>) windowedValue.getValue(); |
| |
| // Each GBK output is the beginning of a key |
| stepContext.setKey(gbkElem.getKey()); |
| |
| for (KV<Instant, WindowedValue<V>> timestampedElem : gbkElem.getValue()) { |
| underlyingParDoFn.processElement(timestampedElem.getValue()); |
| } |
| |
| // Process all the timers for the key, since the watermark is moved to infinity |
| underlyingParDoFn.processTimers(); |
| } |
| |
| @Override |
| public void processTimers() throws Exception { |
| // The timers for the underlying ParDoFn are processed at the end of each element |
| } |
| |
| @Override |
| public void finishBundle() throws Exception { |
| underlyingParDoFn.finishBundle(); |
| } |
| |
| @Override |
| public void abort() throws Exception { |
| underlyingParDoFn.abort(); |
| } |
| } |