org.apache.logging.log4j.util.LowLevelLogUtil Maven / Gradle / Ivy
/*
* 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.util;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.Objects;
/**
* PrintWriter-based logging utility for classes too low level to use {@link org.apache.logging.log4j.status.StatusLogger}.
* Such classes cannot use StatusLogger as StatusLogger or {@link org.apache.logging.log4j.simple.SimpleLogger} depends
* on them for initialization. Other framework classes should stick to using StatusLogger.
*
* @since 2.6
*/
final class LowLevelLogUtil {
private static PrintWriter writer = new PrintWriter(System.err, true);
/**
* Logs the given message.
*
* @param message the message to log
* @since 2.9.2
*/
public static void log(final String message) {
if (message != null) {
writer.println(message);
}
}
public static void logException(final Throwable exception) {
if (exception != null) {
exception.printStackTrace(writer);
}
}
public static void logException(final String message, final Throwable exception) {
log(message);
logException(exception);
}
/**
* Sets the underlying OutputStream where exceptions are printed to.
*
* @param out the OutputStream to log to
*/
public static void setOutputStream(final OutputStream out) {
LowLevelLogUtil.writer = new PrintWriter(Objects.requireNonNull(out), true);
}
/**
* Sets the underlying Writer where exceptions are printed to.
*
* @param writer the Writer to log to
*/
public static void setWriter(final Writer writer) {
LowLevelLogUtil.writer = new PrintWriter(Objects.requireNonNull(writer), true);
}
private LowLevelLogUtil() {
}
}