/*
* 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.core.LogEvent;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.message.StructuredDataMessage;
/**
* Looks up keys from system properties.
*/
@Plugin(name = "sd", category = "Lookup")
public class StructuredDataLookup implements StrLookup {
/**
* Lookup the value for the key.
* @param key the key to be looked up, may be null
* @return The value for the key.
*/
public String lookup(final String key) {
return null;
}
/**
* Lookup the value for the key using the data in the LogEvent.
* @param event The current LogEvent.
* @param key the key to be looked up, may be null
* @return The value associated with the key.
*/
public String lookup(final LogEvent event, final String key) {
if (event == null || !(event.getMessage() instanceof StructuredDataMessage)) {
return null;
}
final StructuredDataMessage msg = (StructuredDataMessage) event.getMessage();
if (key.equalsIgnoreCase("id")) {
return msg.getId().getName();
} else if (key.equalsIgnoreCase("type")) {
return msg.getType();
}
return msg.get(key);
}
}