| /* |
| * 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.transforms.windowing.Trigger.OnceTrigger; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Objects; |
| import org.joda.time.Instant; |
| |
| /** |
| * <i><b>FOR INTERNAL USE ONLY</b></i>. A trigger that fires after synchronized processing time has |
| * reached the processing time of the first element's arrival. |
| * |
| * <p>This is for internal, primarily as a "continuation trigger" for {@link AfterProcessingTime} |
| * triggers. In that use, this trigger is ready as soon as all upstream workers processing time |
| * clocks have caught up to the moment that input arrived. |
| */ |
| public class AfterSynchronizedProcessingTime extends OnceTrigger { |
| |
| public static AfterSynchronizedProcessingTime ofFirstElement() { |
| return new AfterSynchronizedProcessingTime(); |
| } |
| |
| private AfterSynchronizedProcessingTime() { |
| super(null); |
| } |
| |
| @Override |
| public Instant getWatermarkThatGuaranteesFiring(BoundedWindow window) { |
| return BoundedWindow.TIMESTAMP_MAX_VALUE; |
| } |
| |
| @Override |
| protected Trigger getContinuationTrigger(List<Trigger> continuationTriggers) { |
| return this; |
| } |
| |
| @Override |
| public String toString() { |
| return "AfterSynchronizedProcessingTime.pastFirstElementInPane()"; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| return this == obj || obj instanceof AfterSynchronizedProcessingTime; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(AfterSynchronizedProcessingTime.class); |
| } |
| } |