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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project 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:
 *
 *   https://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 io.netty.util.internal.logging;


import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.spi.ExtendedLogger;
import org.apache.logging.log4j.spi.ExtendedLoggerWrapper;

import java.security.AccessController;
import java.security.PrivilegedAction;

import static io.netty.util.internal.logging.AbstractInternalLogger.EXCEPTION_MESSAGE;

class Log4J2Logger extends ExtendedLoggerWrapper implements InternalLogger {

    private static final long serialVersionUID = 5485418394879791397L;
    private static final boolean VARARGS_ONLY;

    static {
        // Older Log4J2 versions have only log methods that takes the format + varargs. So we should not use
        // Log4J2 if the version is too old.
        // See https://github.com/netty/netty/issues/8217
        VARARGS_ONLY = AccessController.doPrivileged(new PrivilegedAction() {
            @Override
            public Boolean run() {
                try {
                    Logger.class.getMethod("debug", String.class, Object.class);
                    return false;
                } catch (NoSuchMethodException ignore) {
                    // Log4J2 version too old.
                    return true;
                } catch (SecurityException ignore) {
                    // We could not detect the version so we will use Log4J2 if its on the classpath.
                    return false;
                }
            }
        });
    }

    Log4J2Logger(Logger logger) {
        super((ExtendedLogger) logger, logger.getName(), logger.getMessageFactory());
        if (VARARGS_ONLY) {
            throw new UnsupportedOperationException("Log4J2 version mismatch");
        }
    }

    @Override
    public String name() {
        return getName();
    }

    @Override
    public void trace(Throwable t) {
        log(Level.TRACE, EXCEPTION_MESSAGE, t);
    }

    @Override
    public void debug(Throwable t) {
        log(Level.DEBUG, EXCEPTION_MESSAGE, t);
    }

    @Override
    public void info(Throwable t) {
        log(Level.INFO, EXCEPTION_MESSAGE, t);
    }

    @Override
    public void warn(Throwable t) {
        log(Level.WARN, EXCEPTION_MESSAGE, t);
    }

    @Override
    public void error(Throwable t) {
        log(Level.ERROR, EXCEPTION_MESSAGE, t);
    }

    @Override
    public boolean isEnabled(InternalLogLevel level) {
        return isEnabled(toLevel(level));
    }

    @Override
    public void log(InternalLogLevel level, String msg) {
        log(toLevel(level), msg);
    }

    @Override
    public void log(InternalLogLevel level, String format, Object arg) {
        log(toLevel(level), format, arg);
    }

    @Override
    public void log(InternalLogLevel level, String format, Object argA, Object argB) {
        log(toLevel(level), format, argA, argB);
    }

    @Override
    public void log(InternalLogLevel level, String format, Object... arguments) {
        log(toLevel(level), format, arguments);
    }

    @Override
    public void log(InternalLogLevel level, String msg, Throwable t) {
        log(toLevel(level), msg, t);
    }

    @Override
    public void log(InternalLogLevel level, Throwable t) {
        log(toLevel(level), EXCEPTION_MESSAGE, t);
    }

    private static Level toLevel(InternalLogLevel level) {
        switch (level) {
            case INFO:
                return Level.INFO;
            case DEBUG:
                return Level.DEBUG;
            case WARN:
                return Level.WARN;
            case ERROR:
                return Level.ERROR;
            case TRACE:
                return Level.TRACE;
            default:
                throw new Error();
        }
    }
}