org.dromara.hutool.log.engine.slf4j.Slf4jLogEngine Maven / Gradle / Ivy
/*
* Copyright (c) 2024 looly([email protected])
* Hutool is licensed under Mulan PSL v2.
* You can use this software according to the terms and conditions of the Mulan PSL v2.
* You may obtain a copy of Mulan PSL v2 at:
* https://license.coscl.org.cn/MulanPSL2
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PSL v2 for more details.
*/
package org.dromara.hutool.log.engine.slf4j;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import org.dromara.hutool.log.AbsLogEngine;
import org.slf4j.LoggerFactory;
import org.slf4j.helpers.NOPLoggerFactory;
import org.dromara.hutool.log.Log;
/**
* SLF4J log.
* 同样无缝支持 LogBack
*
* @author Looly
*/
public class Slf4jLogEngine extends AbsLogEngine {
/**
* 构造
*/
public Slf4jLogEngine() {
this(true);
}
/**
* 构造
*
* @param failIfNOP 如果未找到桥接包是否报错
*/
public Slf4jLogEngine(final boolean failIfNOP) {
super("Slf4j");
checkLogExist(LoggerFactory.class);
if (!failIfNOP) {
return;
}
// SFL4J writes it error messages to System.err. Capture them so that the user does not see such a message on
// the console during automatic detection.
final StringBuilder buf = new StringBuilder();
final PrintStream err = System.err;
try {
System.setErr(new PrintStream(new OutputStream() {
@Override
public void write(final int b) {
buf.append((char) b);
}
}, true, "US-ASCII"));
} catch (final UnsupportedEncodingException e) {
throw new Error(e);
}
try {
if (LoggerFactory.getILoggerFactory() instanceof NOPLoggerFactory) {
throw new NoClassDefFoundError(buf.toString());
} else {
err.print(buf);
err.flush();
}
} finally {
System.setErr(err);
}
}
@Override
public Log createLog(final String name) {
return new Slf4jLog(name);
}
@Override
public Log createLog(final Class clazz) {
return new Slf4jLog(clazz);
}
}