| /* |
| * 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.commons.configuration2.sync; |
| |
| /** |
| * <p> |
| * An implementation of the {@code Synchronizer} interface which does not |
| * perform any synchronization. |
| * </p> |
| * <p> |
| * This class is the option of choice for applications that do not access |
| * configuration concurrently. All methods required by the {@code Synchronizer} |
| * interface are just empty dummies. Therefore, this class does not have any |
| * synchronization overhead. Of course, configurations using this |
| * {@code Synchronizer} implementation are not thread-safe! |
| * </p> |
| * <p> |
| * Implementation note: This class is an enumeration because only a single |
| * instance needs to exist. This instance can be shared between arbitrary |
| * configurations. |
| * </p> |
| * |
| * @version $Id$ |
| * @since 2.0 |
| */ |
| public enum NoOpSynchronizer implements Synchronizer |
| { |
| /** The single shared instance of this class. */ |
| INSTANCE; |
| |
| @Override |
| public void beginRead() |
| { |
| } |
| |
| @Override |
| public void endRead() |
| { |
| } |
| |
| @Override |
| public void beginWrite() |
| { |
| } |
| |
| @Override |
| public void endWrite() |
| { |
| } |
| } |