StdOutLogger

StdOutLogger.java

import org.slf4j.Logger;
import org.slf4j.Marker;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class StdOutLogger implements Logger {

    private final String name;
    private static final Pattern PLACEHOLDER_PATTERN = Pattern.compile("\\{}");

    public StdOutLogger(String name) {
        this.name = name;
    }

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

    private void log(String level, String message, Throwable t) {
        String log = String.format("[%s] [%s] %s", level, name, message);
        System.out.println(log);
        if (t != null) {
            t.printStackTrace(System.out);
        }
    }

    private String formatMessage(String format, Object... arguments) {
        if (arguments == null || arguments.length == 0) {
            return format;
        }
        Matcher matcher = PLACEHOLDER_PATTERN.matcher(format);
        StringBuffer sb = new StringBuffer();
        int i = 0;
        while (matcher.find() && i < arguments.length) {
            matcher.appendReplacement(sb, arguments[i] == null ? "null" : arguments[i].toString());
            i++;
        }
        matcher.appendTail(sb);
        return sb.toString();
    }

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

    @Override
    public void debug(String format, Object arg) {
        log("DEBUG", formatMessage(format, arg), null);
    }

    @Override
    public void debug(String format, Object arg1, Object arg2) {
        log("DEBUG", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void debug(String format, Object... arguments) {
        log("DEBUG", formatMessage(format, arguments), null);
    }

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

    @Override
    public void debug(Marker marker, String msg) {
        log("DEBUG", msg, null);
    }

    @Override
    public void debug(Marker marker, String format, Object arg) {
        log("DEBUG", formatMessage(format, arg), null);
    }

    @Override
    public void debug(Marker marker, String format, Object arg1, Object arg2) {
        log("DEBUG", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void debug(Marker marker, String format, Object... arguments) {
        log("DEBUG", formatMessage(format, arguments), null);
    }

    @Override
    public void debug(Marker marker, String msg, Throwable t) {
        log("DEBUG", msg, t);
    }

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

    @Override
    public void error(String format, Object arg) {
        log("ERROR", formatMessage(format, arg), null);
    }

    @Override
    public void error(String format, Object arg1, Object arg2) {
        log("ERROR", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void error(String format, Object... arguments) {
        log("ERROR", formatMessage(format, arguments), null);
    }

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

    @Override
    public void error(Marker marker, String msg) {
        log("ERROR", msg, null);
    }

    @Override
    public void error(Marker marker, String format, Object arg) {
        log("ERROR", formatMessage(format, arg), null);
    }

    @Override
    public void error(Marker marker, String format, Object arg1, Object arg2) {
        log("ERROR", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void error(Marker marker, String format, Object... arguments) {
        log("ERROR", formatMessage(format, arguments), null);
    }

    @Override
    public void error(Marker marker, String msg, Throwable t) {
        log("ERROR", msg, t);
    }

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

    @Override
    public void info(String format, Object arg) {
        log("INFO", formatMessage(format, arg), null);
    }

    @Override
    public void info(String format, Object arg1, Object arg2) {
        log("INFO", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void info(String format, Object... arguments) {
        log("INFO", formatMessage(format, arguments), null);
    }

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

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

    @Override
    public void info(Marker marker, String format, Object arg) {
        log("INFO", formatMessage(format, arg), null);
    }

    @Override
    public void info(Marker marker, String format, Object arg1, Object arg2) {
        log("INFO", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void info(Marker marker, String format, Object... arguments) {
        log("INFO", formatMessage(format, arguments), null);
    }

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

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

    @Override
    public void trace(String format, Object arg) {
        log("TRACE", formatMessage(format, arg), null);
    }

    @Override
    public void trace(String format, Object arg1, Object arg2) {
        log("TRACE", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void trace(String format, Object... arguments) {
        log("TRACE", formatMessage(format, arguments), null);
    }

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

    @Override
    public void trace(Marker marker, String msg) {
        log("TRACE", msg, null);
    }

    @Override
    public void trace(Marker marker, String format, Object arg) {
        log("TRACE", formatMessage(format, arg), null);
    }

    @Override
    public void trace(Marker marker, String format, Object arg1, Object arg2) {
        log("TRACE", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void trace(Marker marker, String format, Object... arguments) {
        log("TRACE", formatMessage(format, arguments), null);
    }

    @Override
    public void trace(Marker marker, String msg, Throwable t) {
        log("TRACE", msg, t);
    }

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

    @Override
    public void warn(String format, Object arg) {
        log("WARN", formatMessage(format, arg), null);
    }

    @Override
    public void warn(String format, Object arg1, Object arg2) {
        log("WARN", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void warn(String format, Object... arguments) {
        log("WARN", formatMessage(format, arguments), null);
    }

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

    @Override
    public void warn(Marker marker, String msg) {
        log("WARN", msg, null);
    }

    @Override
    public void warn(Marker marker, String format, Object arg) {
        log("WARN", formatMessage(format, arg), null);
    }

    @Override
    public void warn(Marker marker, String format, Object arg1, Object arg2) {
        log("WARN", formatMessage(format, arg1, arg2), null);
    }

    @Override
    public void warn(Marker marker, String format, Object... arguments) {
        log("WARN", formatMessage(format, arguments), null);
    }

    @Override
    public void warn(Marker marker, String msg, Throwable t) {
        log("WARN", msg, t);
    }

    @Override
    public boolean isTraceEnabled() {
        return true;
    }

    @Override
    public boolean isTraceEnabled(Marker marker) {
        return true;
    }

    @Override
    public boolean isDebugEnabled() {
        return true;
    }

    @Override
    public boolean isDebugEnabled(Marker marker) {
        return true;
    }

    @Override
    public boolean isInfoEnabled() {
        return true;
    }

    @Override
    public boolean isInfoEnabled(Marker marker) {
        return true;
    }

    @Override
    public boolean isWarnEnabled() {
        return true;
    }

    @Override
    public boolean isWarnEnabled(Marker marker) {
        return true;
    }

    @Override
    public boolean isErrorEnabled() {
        return true;
    }

    @Override
    public boolean isErrorEnabled(Marker marker) {
        return true;
    }
}