ch.qos.logback/logback-classic/1.2.3 : ch/qos/logback/classic/Logger.java

Logger
http://logback.qos.ch/logback-classic: logback-classic module (QOS.ch)
Ceki Gulcu
Joern Huxhorn
Logback: the reliable, generic, fast and flexible logging framework.
Copyright (C) 1999-2015, QOS.ch. All rights reserved.
This program and the accompanying materials are dual-licensed under
either the terms of the Eclipse Public License v1.0 as published by
the Eclipse Foundation
  or (per the licensee's choosing)
under the terms of the GNU Lesser General Public License version 2.1
as published by the Free Software Foundation.
/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.classic;

import java.io.ObjectStreamException;
import java.io.Serializable;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

import org.slf4j.LoggerFactory;
import org.slf4j.Marker;
import org.slf4j.spi.LocationAwareLogger;

import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.spi.LoggingEvent;
import ch.qos.logback.classic.util.LoggerNameUtil;
import ch.qos.logback.core.Appender;
import ch.qos.logback.core.CoreConstants;
import ch.qos.logback.core.spi.AppenderAttachable;
import ch.qos.logback.core.spi.AppenderAttachableImpl;
import ch.qos.logback.core.spi.FilterReply;

public final class Logger implements org.slf4j.Logger, LocationAwareLogger, AppenderAttachable<ILoggingEvent>, Serializable {

    private static final long serialVersionUID = 5454405123156820674L; // 8745934908040027998L;

    The fully qualified name of this class. Used in gathering caller
information.
/**
     * The fully qualified name of this class. Used in gathering caller
     * information.
     */
    public static final String FQCN = ch.qos.logback.classic.Logger.class.getName();

    The name of this logger
/**
     * The name of this logger
     */
    private String name;

    // The assigned levelInt of this logger. Can be null.
    transient private Level level;

    // The effective levelInt is the assigned levelInt and if null, a levelInt is
    // inherited form a parent.
    transient private int effectiveLevelInt;

    The parent of this category. All categories have at least one ancestor
which is the root category.
/**
     * The parent of this category. All categories have at least one ancestor
     * which is the root category.
     */
    transient private Logger parent;

    The children of this logger. A logger may have zero or more children.
/**
     * The children of this logger. A logger may have zero or more children.
     */
    transient private List<Logger> childrenList;

    It is assumed that once the 'aai' variable is set to a non-null value, it
will never be reset to null. it is further assumed that only place where
the 'aai'ariable is set is within the addAppender method. This method is
synchronized on 'this' (Logger) protecting against simultaneous
re-configuration of this logger (a very unlikely scenario).

It is further assumed that the AppenderAttachableImpl is responsible for
its internal synchronization and thread safety. Thus, we can get away with
 *not* synchronizing on the 'aai' (check null/ read) because

1) the 'aai' variable is immutable once set to non-null

2) 'aai' is getAndSet only within addAppender which is synchronized

3) all the other methods check whether 'aai' is null

4) AppenderAttachableImpl is thread safe
/**
     * It is assumed that once the 'aai' variable is set to a non-null value, it
     * will never be reset to null. it is further assumed that only place where
     * the 'aai'ariable is set is within the addAppender method. This method is
     * synchronized on 'this' (Logger) protecting against simultaneous
     * re-configuration of this logger (a very unlikely scenario).
     * 
     * <p>
     * It is further assumed that the AppenderAttachableImpl is responsible for
     * its internal synchronization and thread safety. Thus, we can get away with
     * *not* synchronizing on the 'aai' (check null/ read) because
     * <p>
     * 1) the 'aai' variable is immutable once set to non-null
     * <p>
     * 2) 'aai' is getAndSet only within addAppender which is synchronized
     * <p>
     * 3) all the other methods check whether 'aai' is null
     * <p>
     * 4) AppenderAttachableImpl is thread safe
     */
    transient private AppenderAttachableImpl<ILoggingEvent> aai;
    Additivity is set to true by default, that is children inherit the
appenders of their ancestors by default. If this variable is set to
false then the appenders located in the ancestors of this
logger will not be used. However, the children of this logger will inherit
its appenders, unless the children have their additivity flag set to
false too. See the user manual for more details.
/**
     * Additivity is set to true by default, that is children inherit the
     * appenders of their ancestors by default. If this variable is set to
     * <code>false</code> then the appenders located in the ancestors of this
     * logger will not be used. However, the children of this logger will inherit
     * its appenders, unless the children have their additivity flag set to
     * <code>false</code> too. See the user manual for more details.
     */
    transient private boolean additive = true;

    final transient LoggerContext loggerContext;

    Logger(String name, Logger parent, LoggerContext loggerContext) {
        this.name = name;
        this.parent = parent;
        this.loggerContext = loggerContext;
    }

    public Level getEffectiveLevel() {
        return Level.toLevel(effectiveLevelInt);
    }

    int getEffectiveLevelInt() {
        return effectiveLevelInt;
    }

    public Level getLevel() {
        return level;
    }

    public String getName() {
        return name;
    }

    private boolean isRootLogger() {
        // only the root logger has a null parent
        return parent == null;
    }

    Logger getChildByName(final String childName) {
        if (childrenList == null) {
            return null;
        } else {
            int len = this.childrenList.size();
            for (int i = 0; i < len; i++) {
                final Logger childLogger_i = (Logger) childrenList.get(i);
                final String childName_i = childLogger_i.getName();

                if (childName.equals(childName_i)) {
                    return childLogger_i;
                }
            }
            // no child found
            return null;
        }
    }

    public synchronized void setLevel(Level newLevel) {
        if (level == newLevel) {
            // nothing to do;
            return;
        }
        if (newLevel == null && isRootLogger()) {
            throw new IllegalArgumentException("The level of the root logger cannot be set to null");
        }

        level = newLevel;
        if (newLevel == null) {
            effectiveLevelInt = parent.effectiveLevelInt;
            newLevel = parent.getEffectiveLevel();
        } else {
            effectiveLevelInt = newLevel.levelInt;
        }

        if (childrenList != null) {
            int len = childrenList.size();
            for (int i = 0; i < len; i++) {
                Logger child = (Logger) childrenList.get(i);
                // tell child to handle parent levelInt change
                child.handleParentLevelChange(effectiveLevelInt);
            }
        }
        // inform listeners
        loggerContext.fireOnLevelChange(this, newLevel);
    }

    This method is invoked by parent logger to let this logger know that the
prent's levelInt changed.
Params: newParentLevelInt – /**
     * This method is invoked by parent logger to let this logger know that the
     * prent's levelInt changed.
     * 
     * @param newParentLevelInt
     */
    private synchronized void handleParentLevelChange(int newParentLevelInt) {
        // changes in the parent levelInt affect children only if their levelInt is
        // null
        if (level == null) {
            effectiveLevelInt = newParentLevelInt;

            // propagate the parent levelInt change to this logger's children
            if (childrenList != null) {
                int len = childrenList.size();
                for (int i = 0; i < len; i++) {
                    Logger child = (Logger) childrenList.get(i);
                    child.handleParentLevelChange(newParentLevelInt);
                }
            }
        }
    }

    Remove all previously added appenders from this logger instance.

This is useful when re-reading configuration information.
/**
     * Remove all previously added appenders from this logger instance.
     * <p/>
     * This is useful when re-reading configuration information.
     */
    public void detachAndStopAllAppenders() {
        if (aai != null) {
            aai.detachAndStopAllAppenders();
        }
    }

    public boolean detachAppender(String name) {
        if (aai == null) {
            return false;
        }
        return aai.detachAppender(name);
    }

    // this method MUST be synchronized. See comments on 'aai' field for further
    // details.
    public synchronized void addAppender(Appender<ILoggingEvent> newAppender) {
        if (aai == null) {
            aai = new AppenderAttachableImpl<ILoggingEvent>();
        }
        aai.addAppender(newAppender);
    }

    public boolean isAttached(Appender<ILoggingEvent> appender) {
        if (aai == null) {
            return false;
        }
        return aai.isAttached(appender);
    }

    @SuppressWarnings("unchecked")
    public Iterator<Appender<ILoggingEvent>> iteratorForAppenders() {
        if (aai == null) {
            return Collections.EMPTY_LIST.iterator();
        }
        return aai.iteratorForAppenders();
    }

    public Appender<ILoggingEvent> getAppender(String name) {
        if (aai == null) {
            return null;
        }
        return aai.getAppender(name);
    }

    Invoke all the appenders of this logger.
Params: event – 
         The event to log/**
     * Invoke all the appenders of this logger.
     * 
     * @param event
     *          The event to log
     */
    public void callAppenders(ILoggingEvent event) {
        int writes = 0;
        for (Logger l = this; l != null; l = l.parent) {
            writes += l.appendLoopOnAppenders(event);
            if (!l.additive) {
                break;
            }
        }
        // No appenders in hierarchy
        if (writes == 0) {
            loggerContext.noAppenderDefinedWarning(this);
        }
    }

    private int appendLoopOnAppenders(ILoggingEvent event) {
        if (aai != null) {
            return aai.appendLoopOnAppenders(event);
        } else {
            return 0;
        }
    }

    Remove the appender passed as parameter form the list of appenders.
/**
     * Remove the appender passed as parameter form the list of appenders.
     */
    public boolean detachAppender(Appender<ILoggingEvent> appender) {
        if (aai == null) {
            return false;
        }
        return aai.detachAppender(appender);
    }

    Create a child of this logger by suffix, that is, the part of the name
extending this logger. For example, if this logger is named "x.y" and the
lastPart is "z", then the created child logger will be named "x.y.z".

IMPORTANT: Calls to this method must be within a synchronized block on this
logger.
Params: lastPart – 
         the suffix (i.e. last part) of the child logger name. This
         parameter may not include dots, i.e. the logger separator
         character.
Returns: /**
     * Create a child of this logger by suffix, that is, the part of the name
     * extending this logger. For example, if this logger is named "x.y" and the
     * lastPart is "z", then the created child logger will be named "x.y.z".
     * 
     * <p>
     * IMPORTANT: Calls to this method must be within a synchronized block on this
     * logger.
     * 
     * @param lastPart
     *          the suffix (i.e. last part) of the child logger name. This
     *          parameter may not include dots, i.e. the logger separator
     *          character.
     * @return

     */
    Logger createChildByLastNamePart(final String lastPart) {
        int i_index = LoggerNameUtil.getFirstSeparatorIndexOf(lastPart);
        if (i_index != -1) {
            throw new IllegalArgumentException("Child name [" + lastPart + " passed as parameter, may not include [" + CoreConstants.DOT + "]");
        }

        if (childrenList == null) {
            childrenList = new CopyOnWriteArrayList<Logger>();
        }
        Logger childLogger;
        if (this.isRootLogger()) {
            childLogger = new Logger(lastPart, this, this.loggerContext);
        } else {
            childLogger = new Logger(name + CoreConstants.DOT + lastPart, this, this.loggerContext);
        }
        childrenList.add(childLogger);
        childLogger.effectiveLevelInt = this.effectiveLevelInt;
        return childLogger;
    }

    private void localLevelReset() {
        effectiveLevelInt = Level.DEBUG_INT;
        if (isRootLogger()) {
            level = Level.DEBUG;
        } else {
            level = null;
        }
    }

    void recursiveReset() {
        detachAndStopAllAppenders();
        localLevelReset();
        additive = true;
        if (childrenList == null) {
            return;
        }
        for (Logger childLogger : childrenList) {
            childLogger.recursiveReset();
        }
    }

    The default size of child list arrays. The JDK 1.5 default is 10. We use a
smaller value to save a little space.
/**
     * The default size of child list arrays. The JDK 1.5 default is 10. We use a
     * smaller value to save a little space.
     */

    Logger createChildByName(final String childName) {
        int i_index = LoggerNameUtil.getSeparatorIndexOf(childName, this.name.length() + 1);
        if (i_index != -1) {
            throw new IllegalArgumentException("For logger [" + this.name + "] child name [" + childName
                            + " passed as parameter, may not include '.' after index" + (this.name.length() + 1));
        }

        if (childrenList == null) {
            childrenList = new CopyOnWriteArrayList<Logger>();
        }
        Logger childLogger;
        childLogger = new Logger(childName, this, this.loggerContext);
        childrenList.add(childLogger);
        childLogger.effectiveLevelInt = this.effectiveLevelInt;
        return childLogger;
    }

    The next methods are not merged into one because of the time we gain by not
creating a new Object[] with the params. This reduces the cost of not
logging by about 20 nanoseconds.
/**
     * The next methods are not merged into one because of the time we gain by not
     * creating a new Object[] with the params. This reduces the cost of not
     * logging by about 20 nanoseconds.
     */

    private void filterAndLog_0_Or3Plus(final String localFQCN, final Marker marker, final Level level, final String msg, final Object[] params,
                    final Throwable t) {

        final FilterReply decision = loggerContext.getTurboFilterChainDecision_0_3OrMore(marker, this, level, msg, params, t);

        if (decision == FilterReply.NEUTRAL) {
            if (effectiveLevelInt > level.levelInt) {
                return;
            }
        } else if (decision == FilterReply.DENY) {
            return;
        }

        buildLoggingEventAndAppend(localFQCN, marker, level, msg, params, t);
    }

    private void filterAndLog_1(final String localFQCN, final Marker marker, final Level level, final String msg, final Object param, final Throwable t) {

        final FilterReply decision = loggerContext.getTurboFilterChainDecision_1(marker, this, level, msg, param, t);

        if (decision == FilterReply.NEUTRAL) {
            if (effectiveLevelInt > level.levelInt) {
                return;
            }
        } else if (decision == FilterReply.DENY) {
            return;
        }

        buildLoggingEventAndAppend(localFQCN, marker, level, msg, new Object[] { param }, t);
    }

    private void filterAndLog_2(final String localFQCN, final Marker marker, final Level level, final String msg, final Object param1, final Object param2,
                    final Throwable t) {

        final FilterReply decision = loggerContext.getTurboFilterChainDecision_2(marker, this, level, msg, param1, param2, t);

        if (decision == FilterReply.NEUTRAL) {
            if (effectiveLevelInt > level.levelInt) {
                return;
            }
        } else if (decision == FilterReply.DENY) {
            return;
        }

        buildLoggingEventAndAppend(localFQCN, marker, level, msg, new Object[] { param1, param2 }, t);
    }

    private void buildLoggingEventAndAppend(final String localFQCN, final Marker marker, final Level level, final String msg, final Object[] params,
                    final Throwable t) {
        LoggingEvent le = new LoggingEvent(localFQCN, this, level, msg, t, params);
        le.setMarker(marker);
        callAppenders(le);
    }

    public void trace(String msg) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.TRACE, msg, null, null);
    }

    public void trace(String format, Object arg) {
        filterAndLog_1(FQCN, null, Level.TRACE, format, arg, null);
    }

    public void trace(String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, null, Level.TRACE, format, arg1, arg2, null);
    }

    public void trace(String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.TRACE, format, argArray, null);
    }

    public void trace(String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.TRACE, msg, null, t);
    }

    public void trace(Marker marker, String msg) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.TRACE, msg, null, null);
    }

    public void trace(Marker marker, String format, Object arg) {
        filterAndLog_1(FQCN, marker, Level.TRACE, format, arg, null);
    }

    public void trace(Marker marker, String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, marker, Level.TRACE, format, arg1, arg2, null);
    }

    public void trace(Marker marker, String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.TRACE, format, argArray, null);
    }

    public void trace(Marker marker, String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.TRACE, msg, null, t);
    }

    public boolean isDebugEnabled() {
        return isDebugEnabled(null);
    }

    public boolean isDebugEnabled(Marker marker) {
        final FilterReply decision = callTurboFilters(marker, Level.DEBUG);
        if (decision == FilterReply.NEUTRAL) {
            return effectiveLevelInt <= Level.DEBUG_INT;
        } else if (decision == FilterReply.DENY) {
            return false;
        } else if (decision == FilterReply.ACCEPT) {
            return true;
        } else {
            throw new IllegalStateException("Unknown FilterReply value: " + decision);
        }
    }

    public void debug(String msg) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.DEBUG, msg, null, null);
    }

    public void debug(String format, Object arg) {
        filterAndLog_1(FQCN, null, Level.DEBUG, format, arg, null);
    }

    public void debug(String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, null, Level.DEBUG, format, arg1, arg2, null);
    }

    public void debug(String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.DEBUG, format, argArray, null);
    }

    public void debug(String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.DEBUG, msg, null, t);
    }

    public void debug(Marker marker, String msg) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.DEBUG, msg, null, null);
    }

    public void debug(Marker marker, String format, Object arg) {
        filterAndLog_1(FQCN, marker, Level.DEBUG, format, arg, null);
    }

    public void debug(Marker marker, String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, marker, Level.DEBUG, format, arg1, arg2, null);
    }

    public void debug(Marker marker, String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.DEBUG, format, argArray, null);
    }

    public void debug(Marker marker, String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.DEBUG, msg, null, t);
    }

    public void error(String msg) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.ERROR, msg, null, null);
    }

    public void error(String format, Object arg) {
        filterAndLog_1(FQCN, null, Level.ERROR, format, arg, null);
    }

    public void error(String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, null, Level.ERROR, format, arg1, arg2, null);
    }

    public void error(String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.ERROR, format, argArray, null);
    }

    public void error(String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.ERROR, msg, null, t);
    }

    public void error(Marker marker, String msg) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.ERROR, msg, null, null);
    }

    public void error(Marker marker, String format, Object arg) {
        filterAndLog_1(FQCN, marker, Level.ERROR, format, arg, null);
    }

    public void error(Marker marker, String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, marker, Level.ERROR, format, arg1, arg2, null);
    }

    public void error(Marker marker, String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.ERROR, format, argArray, null);
    }

    public void error(Marker marker, String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.ERROR, msg, null, t);
    }

    public boolean isInfoEnabled() {
        return isInfoEnabled(null);
    }

    public boolean isInfoEnabled(Marker marker) {
        FilterReply decision = callTurboFilters(marker, Level.INFO);
        if (decision == FilterReply.NEUTRAL) {
            return effectiveLevelInt <= Level.INFO_INT;
        } else if (decision == FilterReply.DENY) {
            return false;
        } else if (decision == FilterReply.ACCEPT) {
            return true;
        } else {
            throw new IllegalStateException("Unknown FilterReply value: " + decision);
        }
    }

    public void info(String msg) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.INFO, msg, null, null);
    }

    public void info(String format, Object arg) {
        filterAndLog_1(FQCN, null, Level.INFO, format, arg, null);
    }

    public void info(String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, null, Level.INFO, format, arg1, arg2, null);
    }

    public void info(String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.INFO, format, argArray, null);
    }

    public void info(String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.INFO, msg, null, t);
    }

    public void info(Marker marker, String msg) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.INFO, msg, null, null);
    }

    public void info(Marker marker, String format, Object arg) {
        filterAndLog_1(FQCN, marker, Level.INFO, format, arg, null);
    }

    public void info(Marker marker, String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, marker, Level.INFO, format, arg1, arg2, null);
    }

    public void info(Marker marker, String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.INFO, format, argArray, null);
    }

    public void info(Marker marker, String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.INFO, msg, null, t);
    }

    public boolean isTraceEnabled() {
        return isTraceEnabled(null);
    }

    public boolean isTraceEnabled(Marker marker) {
        final FilterReply decision = callTurboFilters(marker, Level.TRACE);
        if (decision == FilterReply.NEUTRAL) {
            return effectiveLevelInt <= Level.TRACE_INT;
        } else if (decision == FilterReply.DENY) {
            return false;
        } else if (decision == FilterReply.ACCEPT) {
            return true;
        } else {
            throw new IllegalStateException("Unknown FilterReply value: " + decision);
        }
    }

    public boolean isErrorEnabled() {
        return isErrorEnabled(null);
    }

    public boolean isErrorEnabled(Marker marker) {
        FilterReply decision = callTurboFilters(marker, Level.ERROR);
        if (decision == FilterReply.NEUTRAL) {
            return effectiveLevelInt <= Level.ERROR_INT;
        } else if (decision == FilterReply.DENY) {
            return false;
        } else if (decision == FilterReply.ACCEPT) {
            return true;
        } else {
            throw new IllegalStateException("Unknown FilterReply value: " + decision);
        }
    }

    public boolean isWarnEnabled() {
        return isWarnEnabled(null);
    }

    public boolean isWarnEnabled(Marker marker) {
        FilterReply decision = callTurboFilters(marker, Level.WARN);
        if (decision == FilterReply.NEUTRAL) {
            return effectiveLevelInt <= Level.WARN_INT;
        } else if (decision == FilterReply.DENY) {
            return false;
        } else if (decision == FilterReply.ACCEPT) {
            return true;
        } else {
            throw new IllegalStateException("Unknown FilterReply value: " + decision);
        }

    }

    public boolean isEnabledFor(Marker marker, Level level) {
        FilterReply decision = callTurboFilters(marker, level);
        if (decision == FilterReply.NEUTRAL) {
            return effectiveLevelInt <= level.levelInt;
        } else if (decision == FilterReply.DENY) {
            return false;
        } else if (decision == FilterReply.ACCEPT) {
            return true;
        } else {
            throw new IllegalStateException("Unknown FilterReply value: " + decision);
        }
    }

    public boolean isEnabledFor(Level level) {
        return isEnabledFor(null, level);
    }

    public void warn(String msg) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.WARN, msg, null, null);
    }

    public void warn(String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.WARN, msg, null, t);
    }

    public void warn(String format, Object arg) {
        filterAndLog_1(FQCN, null, Level.WARN, format, arg, null);
    }

    public void warn(String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, null, Level.WARN, format, arg1, arg2, null);
    }

    public void warn(String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, null, Level.WARN, format, argArray, null);
    }

    public void warn(Marker marker, String msg) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.WARN, msg, null, null);
    }

    public void warn(Marker marker, String format, Object arg) {
        filterAndLog_1(FQCN, marker, Level.WARN, format, arg, null);
    }

    public void warn(Marker marker, String format, Object... argArray) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.WARN, format, argArray, null);
    }

    public void warn(Marker marker, String format, Object arg1, Object arg2) {
        filterAndLog_2(FQCN, marker, Level.WARN, format, arg1, arg2, null);
    }

    public void warn(Marker marker, String msg, Throwable t) {
        filterAndLog_0_Or3Plus(FQCN, marker, Level.WARN, msg, null, t);
    }

    public boolean isAdditive() {
        return additive;
    }

    public void setAdditive(boolean additive) {
        this.additive = additive;
    }

    public String toString() {
        return "Logger[" + name + "]";
    }

    Method that calls the attached TurboFilter objects based on the logger and
the level.
It is used by isYYYEnabled() methods.
It returns the typical FilterReply values: ACCEPT, NEUTRAL or DENY.
Params: level – 
Returns: the reply given by the TurboFilters/**
     * Method that calls the attached TurboFilter objects based on the logger and
     * the level.
     * 
     * It is used by isYYYEnabled() methods.
     * 
     * It returns the typical FilterReply values: ACCEPT, NEUTRAL or DENY.
     * 
     * @param level
     * @return the reply given by the TurboFilters
     */
    private FilterReply callTurboFilters(Marker marker, Level level) {
        return loggerContext.getTurboFilterChainDecision_0_3OrMore(marker, this, level, null, null, null);
    }

    Return the context for this logger.
Returns: the context/**
     * Return the context for this logger.
     * 
     * @return the context
     */
    public LoggerContext getLoggerContext() {
        return loggerContext;
    }

    public void log(Marker marker, String fqcn, int levelInt, String message, Object[] argArray, Throwable t) {
        Level level = Level.fromLocationAwareLoggerInteger(levelInt);
        filterAndLog_0_Or3Plus(fqcn, marker, level, message, argArray, t);
    }

    Support SLF4J interception during initialization as introduced in SLF4J version 1.7.15
Params: slf4jEvent – 
Since: 1.1.4/**
     * Support SLF4J interception during initialization as introduced in SLF4J version 1.7.15
     * @since 1.1.4 
     * @param slf4jEvent
     */
    public void log(org.slf4j.event.LoggingEvent slf4jEvent) {
        Level level = Level.fromLocationAwareLoggerInteger(slf4jEvent.getLevel().toInt());
        filterAndLog_0_Or3Plus(FQCN, slf4jEvent.getMarker(), level, slf4jEvent.getMessage(), slf4jEvent.getArgumentArray(), slf4jEvent.getThrowable());
    }

    After serialization, the logger instance does not know its LoggerContext.
The best we can do here, is to return a logger with the same name
returned by org.slf4j.LoggerFactory.
Throws: ObjectStreamException – 
Returns: Logger instance with the same name/**
     * After serialization, the logger instance does not know its LoggerContext.
     * The best we can do here, is to return a logger with the same name
     * returned by org.slf4j.LoggerFactory.
     * 
     * @return Logger instance with the same name
     * @throws ObjectStreamException
     */
    protected Object readResolve() throws ObjectStreamException {
        return LoggerFactory.getLogger(getName());
    }
}
Params:	lastPart – the suffix (i.e. last part) of the child logger name. This parameter may not include dots, i.e. the logger separator character.
Returns:
Throws:	ObjectStreamException –
Returns:	Logger instance with the same name
/

ch.qos.logback/ logback-classic/ 1.2.3/ ch/qos/logback/classic/Logger.java
