| /* |
| * 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 javax.annotation.Nullable; |
| import org.apache.beam.sdk.transforms.windowing.BoundedWindow; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions; |
| import org.joda.time.Instant; |
| |
| /** Some timestamp conversion helpers for working with Windmill. */ |
| public class WindmillTimeUtils { |
| /** Convert a Windmill watermark to a harness watermark. */ |
| @Nullable |
| public static Instant windmillToHarnessWatermark(long watermarkUs) { |
| if (watermarkUs == Long.MIN_VALUE) { |
| // Not yet known. |
| return null; |
| } else { |
| return windmillToHarnessTimestamp(watermarkUs); |
| } |
| } |
| |
| /** |
| * Convert a Windmill message timestamp to a harness timestamp. |
| * |
| * <p>For soundness we require the test {@code harness message timestamp >= harness output |
| * watermark} to imply {@code windmill message timestamp >= windmill output watermark}. Thus we |
| * round timestamps down and output watermarks up. |
| */ |
| public static Instant windmillToHarnessTimestamp(long timestampUs) { |
| // Windmill should never send us an unknown timestamp. |
| Preconditions.checkArgument(timestampUs != Long.MIN_VALUE); |
| Instant result = new Instant(divideAndRoundDown(timestampUs, 1000)); |
| if (result.isAfter(BoundedWindow.TIMESTAMP_MAX_VALUE)) { |
| // End of time. |
| return BoundedWindow.TIMESTAMP_MAX_VALUE; |
| } |
| return result; |
| } |
| |
| /** Convert a harness timestamp to a Windmill timestamp. */ |
| public static long harnessToWindmillTimestamp(Instant timestamp) { |
| if (!timestamp.isBefore(BoundedWindow.TIMESTAMP_MAX_VALUE)) { |
| // End of time. |
| return Long.MAX_VALUE; |
| } else if (timestamp.getMillis() < Long.MIN_VALUE / 1000) { |
| return Long.MIN_VALUE + 1; |
| } else { |
| return timestamp.getMillis() * 1000; |
| } |
| } |
| |
| private static long divideAndRoundDown(long number, long divisor) { |
| return number / divisor - ((number < 0 && number % divisor != 0) ? 1 : 0); |
| } |
| } |