| /* |
| * 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.nifi.registry.extension; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| |
| public class ExtensionCloseable implements Closeable { |
| private final ClassLoader toSet; |
| |
| private ExtensionCloseable(ClassLoader toSet) { |
| this.toSet = toSet; |
| } |
| |
| public static ExtensionCloseable withComponentClassLoader(final ExtensionManager manager, final Class componentClass) { |
| |
| final ClassLoader current = Thread.currentThread().getContextClassLoader(); |
| final ExtensionCloseable closeable = new ExtensionCloseable(current); |
| |
| ClassLoader componentClassLoader = manager.getExtensionClassLoader(componentClass.getName()); |
| if (componentClassLoader == null) { |
| componentClassLoader = componentClass.getClassLoader(); |
| } |
| |
| Thread.currentThread().setContextClassLoader(componentClassLoader); |
| return closeable; |
| } |
| |
| public static ExtensionCloseable withClassLoader(final ClassLoader componentClassLoader) { |
| final ClassLoader current = Thread.currentThread().getContextClassLoader(); |
| final ExtensionCloseable closeable = new ExtensionCloseable(current); |
| Thread.currentThread().setContextClassLoader(componentClassLoader); |
| return closeable; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| if (toSet != null) { |
| Thread.currentThread().setContextClassLoader(toSet); |
| } |
| } |
| } |