| /* |
| * 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 org.apache.logging.log4j.ThreadContext; |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.apache.logging.log4j.plugins.Plugin; |
| import org.apache.logging.log4j.core.ContextDataInjector; |
| import org.apache.logging.log4j.core.impl.ContextDataInjectorFactory; |
| import org.apache.logging.log4j.util.ReadOnlyStringMap; |
| |
| /** |
| * Looks up keys from the context. By default this is the {@link ThreadContext}, but users may |
| * {@linkplain ContextDataInjectorFactory configure} a custom {@link ContextDataInjector} which obtains context data |
| * from some other source. |
| */ |
| @Plugin(name = "ctx", category = StrLookup.CATEGORY) |
| public class ContextMapLookup implements StrLookup { |
| |
| private final ContextDataInjector injector = ContextDataInjectorFactory.createInjector(); |
| |
| /** |
| * Looks up the value from the ThreadContext Map. |
| * @param key the key to be looked up, may be null |
| * @return The value associated with the key. |
| */ |
| @Override |
| public String lookup(final String key) { |
| return currentContextData().getValue(key); |
| } |
| |
| private ReadOnlyStringMap currentContextData() { |
| return injector.rawContextData(); |
| } |
| |
| /** |
| * Looks up the value from the ThreadContext Map. |
| * @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) { |
| return event.getContextData().getValue(key); |
| } |
| } |