This is an automated email from the ASF dual-hosted git repository. ggregory pushed a commit to branch master in repository https://gitbox.apache.org/repos/asf/logging-log4j2.git
commit b405c93edcca3c9dce8f57ffee12128ef280226f Author: Gary Gregory <[email protected]> AuthorDate: Wed Jan 5 17:51:21 2022 -0500 Log4j 1.2 bridge adds org.apache.log4j.spi.RootLogger. --- .../main/java/org/apache/log4j/spi/RootLogger.java | 64 ++++++++++++++++++++++ 1 file changed, 64 insertions(+) diff --git a/log4j-1.2-api/src/main/java/org/apache/log4j/spi/RootLogger.java b/log4j-1.2-api/src/main/java/org/apache/log4j/spi/RootLogger.java new file mode 100644 index 0000000..afd4619 --- /dev/null +++ b/log4j-1.2-api/src/main/java/org/apache/log4j/spi/RootLogger.java @@ -0,0 +1,64 @@ +/* + * 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.log4j.spi; + +import org.apache.log4j.Level; +import org.apache.log4j.Logger; +import org.apache.log4j.helpers.LogLog; + +/** + * RootLogger sits at the top of the logger hierarchy. It is a regular logger except that it provides several guarantees. + * <p> + * First, it cannot be assigned a <code>null</code> level. Second, since root logger cannot have a parent, the + * {@link #getChainedLevel} method always returns the value of the level field without walking the hierarchy. + * </p> + */ +public final class RootLogger extends Logger { + + /** + * The root logger names itself as "root". However, the root logger cannot be retrieved by name. + */ + public RootLogger(Level level) { + // Note that the Log4j 2 root logger name is "". + super("root"); + setLevel(level); + } + + /** + * Gets the assigned level value without walking the logger hierarchy. + */ + public final Level getChainedLevel() { + return getLevel(); + } + + /** + * Sets the log level. + * + * Setting a null value to the level of the root logger may have catastrophic results. We prevent this here. + * + * @since 0.8.3 + */ + public final void setLevel(Level level) { + if (level == null) { + LogLog.error("You have tried to set a null level to root.", new Throwable()); + } else { + super.setLevel(level); + } + } + +}
