| /* |
| * 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.flink.statefun.flink.core; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import org.apache.flink.configuration.Configuration; |
| import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; |
| |
| final class FlinkConfigExtractor { |
| |
| /** |
| * Reflectively extracts Flink {@link Configuration} from a {@link StreamExecutionEnvironment}. |
| * The Flink configuration contains Stateful Functions specific configurations. This is currently |
| * a private method in the {@code StreamExecutionEnvironment} class. |
| */ |
| static Configuration reflectivelyExtractFromEnv(StreamExecutionEnvironment env) { |
| try { |
| return (Configuration) getConfigurationMethod().invoke(env); |
| } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) { |
| throw new RuntimeException( |
| "Failed to acquire the Flink configuration from the current environment", e); |
| } |
| } |
| |
| private static Method getConfigurationMethod() throws NoSuchMethodException { |
| Method getConfiguration = |
| StreamExecutionEnvironment.class.getDeclaredMethod("getConfiguration"); |
| getConfiguration.setAccessible(true); |
| return getConfiguration; |
| } |
| } |