| /* |
| * 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.logging.log4j.core.lookup; |
| |
| import java.util.MissingResourceException; |
| import java.util.ResourceBundle; |
| |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.Marker; |
| import org.apache.logging.log4j.MarkerManager; |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.apache.logging.log4j.plugins.Plugin; |
| import org.apache.logging.log4j.status.StatusLogger; |
| |
| /** |
| * Looks up keys from resource bundles. |
| */ |
| @Plugin(name = "bundle", category = StrLookup.CATEGORY) |
| public class ResourceBundleLookup extends AbstractLookup { |
| |
| private static final Logger LOGGER = StatusLogger.getLogger(); |
| private static final Marker LOOKUP = MarkerManager.getMarker("LOOKUP"); |
| |
| /** |
| * Looks up the value for the key in the format "BundleName:BundleKey". |
| * |
| * For example: "com.domain.messages:MyKey". |
| * |
| * @param event |
| * The current LogEvent. |
| * @param key |
| * the key to be looked up, may be null |
| * @return The value associated with the key. |
| */ |
| @Override |
| public String lookup(final LogEvent event, final String key) { |
| if (key == null) { |
| return null; |
| } |
| final String[] keys = key.split(":"); |
| final int keyLen = keys.length; |
| if (keyLen != 2) { |
| LOGGER.warn(LOOKUP, "Bad ResourceBundle key format [{}]. Expected format is BundleName:KeyName.", key); |
| return null; |
| } |
| final String bundleName = keys[0]; |
| final String bundleKey = keys[1]; |
| try { |
| // The ResourceBundle class caches bundles, no need to cache here. |
| return ResourceBundle.getBundle(bundleName).getString(bundleKey); |
| } catch (final MissingResourceException e) { |
| LOGGER.warn(LOOKUP, "Error looking up ResourceBundle [{}].", bundleName, e); |
| return null; |
| } |
| } |
| } |