| /* |
| * 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.iceberg.flink.util; |
| |
| import java.util.concurrent.atomic.AtomicReference; |
| import org.apache.flink.streaming.api.datastream.DataStream; |
| import org.apache.iceberg.relocated.com.google.common.annotations.VisibleForTesting; |
| |
| public class FlinkPackage { |
| |
| private static final AtomicReference<String> VERSION = new AtomicReference<>(); |
| public static final String FLINK_UNKNOWN_VERSION = "FLINK-UNKNOWN-VERSION"; |
| |
| private FlinkPackage() {} |
| |
| /** Returns Flink version string like x.y.z */ |
| public static String version() { |
| if (null == VERSION.get()) { |
| String detectedVersion = null; |
| try { |
| detectedVersion = versionFromJar(); |
| // use unknown version in case exact implementation version can't be found from the jar |
| // (this can happen if the DataStream class appears multiple times in the same classpath |
| // such as with shading) |
| detectedVersion = detectedVersion != null ? detectedVersion : FLINK_UNKNOWN_VERSION; |
| } catch (Exception e) { |
| detectedVersion = FLINK_UNKNOWN_VERSION; |
| } |
| VERSION.set(detectedVersion); |
| } |
| |
| return VERSION.get(); |
| } |
| |
| @VisibleForTesting |
| static String versionFromJar() { |
| // Choose {@link DataStream} class because it is one of the core Flink API |
| return DataStream.class.getPackage().getImplementationVersion(); |
| } |
| |
| @VisibleForTesting |
| static void setVersion(String version) { |
| VERSION.set(version); |
| } |
| } |