| /* |
| * 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 java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.file.Files; |
| import java.nio.file.StandardCopyOption; |
| |
| /** Native library used to read from and write to a shuffle dataset. */ |
| class ShuffleLibrary { |
| /** Loads the native shuffle library. */ |
| static void load() { |
| ShuffleLibraryLoader.load(); |
| } |
| |
| private static class ShuffleLibraryLoader { |
| private static void load() {} |
| |
| static { |
| try { |
| final String shuffleClientLibraryPropertyKey = "batch.shuffle_client_library"; |
| String shuffleClientLibrary = "libshuffle_client_jni.so.stripped"; |
| if (System.getProperties().containsKey(shuffleClientLibraryPropertyKey)) { |
| shuffleClientLibrary = System.getProperty(shuffleClientLibraryPropertyKey); |
| } |
| File tempfile = File.createTempFile("libshuffle_client_jni", ".so"); |
| InputStream input = ClassLoader.getSystemResourceAsStream(shuffleClientLibrary); |
| Files.copy(input, tempfile.toPath(), StandardCopyOption.REPLACE_EXISTING); |
| System.load(tempfile.getAbsolutePath()); |
| } catch (IOException e) { |
| throw new RuntimeException("Loading shuffle_client failed:", e); |
| } |
| } |
| } |
| } |