| /* |
| * 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.sdk.transforms.windowing; |
| |
| import java.util.List; |
| import org.apache.beam.sdk.annotations.Internal; |
| import org.apache.beam.sdk.transforms.Reshuffle; |
| import org.joda.time.Instant; |
| |
| /** |
| * <b>For internal use only; no backwards compatibility guarantees.</b> |
| * |
| * <p>The trigger used with {@link Reshuffle} which triggers on every element and never buffers |
| * state. |
| * |
| * @param <W> The kind of window that is being reshuffled. |
| * @deprecated The intended side effect of {@link Reshuffle} is not portable; it will likely be |
| * removed |
| */ |
| @Internal |
| @Deprecated |
| public class ReshuffleTrigger<W extends BoundedWindow> extends Trigger { |
| |
| public ReshuffleTrigger() { |
| super(); |
| } |
| |
| @Override |
| protected Trigger getContinuationTrigger(List<Trigger> continuationTriggers) { |
| return this; |
| } |
| |
| @Override |
| public Instant getWatermarkThatGuaranteesFiring(BoundedWindow window) { |
| throw new UnsupportedOperationException( |
| "ReshuffleTrigger should not be used outside of Reshuffle"); |
| } |
| |
| @Override |
| public boolean mayFinish() { |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return "ReshuffleTrigger()"; |
| } |
| } |