| /* |
| * 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.samza.runtime; |
| |
| import static org.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkState; |
| |
| import org.apache.beam.runners.core.DoFnRunner; |
| import org.apache.beam.runners.core.KeyedWorkItem; |
| import org.apache.beam.runners.core.TimerInternals; |
| import org.apache.beam.sdk.state.TimeDomain; |
| import org.apache.beam.sdk.transforms.DoFn; |
| import org.apache.beam.sdk.transforms.windowing.BoundedWindow; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.sdk.values.KV; |
| import org.joda.time.Instant; |
| |
| /** This class wraps a DoFnRunner with keyed StateInternals and TimerInternals access. */ |
| public class DoFnRunnerWithKeyedInternals<InputT, OutputT> implements DoFnRunner<InputT, OutputT> { |
| private final DoFnRunner<InputT, OutputT> underlying; |
| private final KeyedInternals keyedInternals; |
| |
| DoFnRunnerWithKeyedInternals( |
| DoFnRunner<InputT, OutputT> doFnRunner, KeyedInternals keyedInternals) { |
| this.underlying = doFnRunner; |
| this.keyedInternals = keyedInternals; |
| } |
| |
| @Override |
| public void startBundle() { |
| underlying.startBundle(); |
| } |
| |
| @Override |
| public void processElement(WindowedValue<InputT> elem) { |
| // NOTE: this is thread-safe if we only allow concurrency on the per-key basis. |
| setKeyedInternals(elem.getValue()); |
| |
| try { |
| underlying.processElement(elem); |
| } finally { |
| clearKeyedInternals(); |
| } |
| } |
| |
| public void onTimer(KeyedTimerData keyedTimerData, BoundedWindow window) { |
| setKeyedInternals(keyedTimerData); |
| |
| try { |
| final TimerInternals.TimerData timer = keyedTimerData.getTimerData(); |
| onTimer(timer.getTimerId(), window, timer.getTimestamp(), timer.getDomain()); |
| } finally { |
| clearKeyedInternals(); |
| } |
| } |
| |
| @Override |
| public void onTimer( |
| String timerId, BoundedWindow window, Instant timestamp, TimeDomain timeDomain) { |
| checkState(keyedInternals.getKey() != null, "Key is not set for timer"); |
| |
| underlying.onTimer(timerId, window, timestamp, timeDomain); |
| } |
| |
| @Override |
| public void finishBundle() { |
| underlying.finishBundle(); |
| } |
| |
| @Override |
| public DoFn<InputT, OutputT> getFn() { |
| return underlying.getFn(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private void setKeyedInternals(Object value) { |
| if (value instanceof KeyedWorkItem) { |
| keyedInternals.setKey(((KeyedWorkItem<?, ?>) value).key()); |
| } else if (value instanceof KeyedTimerData) { |
| final Object key = ((KeyedTimerData) value).getKey(); |
| if (key != null) { |
| keyedInternals.setKey(key); |
| } |
| } else { |
| keyedInternals.setKey(((KV<?, ?>) value).getKey()); |
| } |
| } |
| |
| private void clearKeyedInternals() { |
| keyedInternals.clearKey(); |
| } |
| } |