| /* |
| * 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.fn; |
| |
| import org.apache.beam.sdk.harness.JvmInitializer; |
| import org.apache.beam.sdk.options.PipelineOptions; |
| import org.apache.beam.sdk.util.common.ReflectHelpers; |
| |
| /** Helpers for executing {@link JvmInitializer} implementations. */ |
| public class JvmInitializers { |
| /** |
| * Finds all registered implementations of JvmInitializer and executes their {@code onStartup} |
| * methods. Should be called in worker harness implementations at the very beginning of their main |
| * method. |
| */ |
| public static void runOnStartup() { |
| for (JvmInitializer initializer : ReflectHelpers.loadServicesOrdered(JvmInitializer.class)) { |
| initializer.onStartup(); |
| } |
| } |
| |
| /** |
| * Finds all registered implementations of JvmInitializer and executes their {@code |
| * beforeProcessing} methods. Should be called in worker harness implementations after |
| * initialization but before beginning to process any data. |
| * |
| * @param options The pipeline options passed to the worker. |
| */ |
| public static void runBeforeProcessing(PipelineOptions options) { |
| for (JvmInitializer initializer : ReflectHelpers.loadServicesOrdered(JvmInitializer.class)) { |
| initializer.beforeProcessing(options); |
| } |
| } |
| } |