GwtLoggerSlf4jBackend.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.ide.logger.slf4j.gwtbackend;

import org.slf4j.helpers.FormattingTuple;
import org.slf4j.helpers.MarkerIgnoringBase;
import org.slf4j.helpers.MessageFormatter;

import java.util.logging.Level;
import java.util.logging.Logger;

import static java.util.logging.Level.FINE;
import static java.util.logging.Level.FINEST;
import static java.util.logging.Level.INFO;
import static java.util.logging.Level.SEVERE;
import static java.util.logging.Level.WARNING;

/**
 * A wrapper over {@link java.util.logging.Logger} supported since GWT 2.1.
 */
public class GwtLoggerSlf4jBackend extends MarkerIgnoringBase {
    private final Logger logger;

    public GwtLoggerSlf4jBackend(String name) {
        logger = Logger.getLogger(name);
    }

    @Override
    public boolean isTraceEnabled() {
        return logger.isLoggable(FINEST);
    }

    @Override
    public void trace(String msg) {
        log(FINEST, msg, null);
    }

    @Override
    public void trace(String format, Object arg) {
        formatAndLog(FINEST, format, arg);
    }

    @Override
    public void trace(String format, Object arg1, Object arg2) {
        formatAndLog(FINEST, format, arg1, arg2);
    }

    @Override
    public void trace(String format, Object... argArray) {
        formatAndLog(FINEST, format, argArray);
    }

    @Override
    public void trace(String msg, Throwable t) {
        log(FINEST, msg, t);
    }

    @Override
    public boolean isDebugEnabled() {
        return logger.isLoggable(FINE);
    }

    @Override
    public void debug(String msg) {
        log(FINE, msg, null);
    }

    @Override
    public void debug(String format, Object arg) {
        formatAndLog(FINE, format, arg);
    }

    @Override
    public void debug(String format, Object arg1, Object arg2) {
        formatAndLog(FINE, format, arg1, arg2);
    }

    @Override
    public void debug(String format, Object... argArray) {
        formatAndLog(FINE, format, argArray);
    }

    @Override
    public void debug(String msg, Throwable t) {
        log(FINE, msg, t);
    }

    @Override
    public boolean isInfoEnabled() {
        return logger.isLoggable(INFO);
    }

    @Override
    public void info(String msg) {
        log(INFO, msg, null);
    }

    @Override
    public void info(String format, Object arg) {
        formatAndLog(INFO, format, arg);
    }

    @Override
    public void info(String format, Object arg1, Object arg2) {
        formatAndLog(INFO, format, arg1, arg2);
    }

    @Override
    public void info(String format, Object... argArray) {
        formatAndLog(INFO, format, argArray);
    }

    @Override
    public void info(String msg, Throwable t) {
        log(INFO, msg, t);
    }

    @Override
    public boolean isWarnEnabled() {
        return logger.isLoggable(WARNING);
    }

    @Override
    public void warn(String msg) {
        log(WARNING, msg, null);
    }

    @Override
    public void warn(String format, Object arg) {
        formatAndLog(WARNING, format, arg);
    }

    @Override
    public void warn(String format, Object arg1, Object arg2) {
        formatAndLog(WARNING, format, arg1, arg2);
    }

    @Override
    public void warn(String format, Object... argArray) {
        formatAndLog(WARNING, format, argArray);
    }

    @Override
    public void warn(String msg, Throwable t) {
        log(WARNING, msg, t);
    }

    @Override
    public boolean isErrorEnabled() {
        return logger.isLoggable(SEVERE);
    }

    @Override
    public void error(String msg) {
        log(SEVERE, msg, null);
    }

    @Override
    public void error(String format, Object arg) {
        formatAndLog(SEVERE, format, arg);
    }

    @Override
    public void error(String format, Object arg1, Object arg2) {
        formatAndLog(SEVERE, format, arg1, arg2);
    }

    @Override
    public void error(String format, Object... argArray) {
        formatAndLog(SEVERE, format, argArray);
    }

    @Override
    public void error(String msg, Throwable t) {
        log(SEVERE, msg, t);
    }

    private void log(Level level, String msg, Throwable t) {
        if (logger.isLoggable(level)) {
            logger.log(level, msg, t);
        }
    }

    private void formatAndLog(Level level, String format, Object... argArray) {
        if (logger.isLoggable(level)) {
            FormattingTuple ft = MessageFormatter.arrayFormat(format, argArray);
            logger.log(level, ft.getMessage(), ft.getThrowable());
        }
    }
}