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/**
 * Copyright (c) 2004-2011 QOS.ch
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.slf4j.helpers;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Queue;

import org.slf4j.Logger;
import org.slf4j.Marker;
import org.slf4j.event.EventRecodingLogger;
import org.slf4j.event.LoggingEvent;
import org.slf4j.event.SubstituteLoggingEvent;

/**
 * A logger implementation which logs via a delegate logger. By default, the delegate is a
 * {@link NOPLogger}. However, a different delegate can be set at any time.
 * 

* See also the relevant * error code documentation. * * @author Chetan Mehrotra * @author Ceki Gulcu */ public class SubstituteLogger implements Logger { private final String name; private volatile Logger _delegate; private Boolean delegateEventAware; private Method logMethodCache; private EventRecodingLogger eventRecodingLogger; private Queue eventQueue; private final boolean createdPostInitialization; public SubstituteLogger(String name, Queue eventQueue, boolean createdPostInitialization) { this.name = name; this.eventQueue = eventQueue; this.createdPostInitialization = createdPostInitialization; } public String getName() { return name; } public boolean isTraceEnabled() { return delegate().isTraceEnabled(); } public void trace(String msg) { delegate().trace(msg); } public void trace(String format, Object arg) { delegate().trace(format, arg); } public void trace(String format, Object arg1, Object arg2) { delegate().trace(format, arg1, arg2); } public void trace(String format, Object... arguments) { delegate().trace(format, arguments); } public void trace(String msg, Throwable t) { delegate().trace(msg, t); } public boolean isTraceEnabled(Marker marker) { return delegate().isTraceEnabled(marker); } public void trace(Marker marker, String msg) { delegate().trace(marker, msg); } public void trace(Marker marker, String format, Object arg) { delegate().trace(marker, format, arg); } public void trace(Marker marker, String format, Object arg1, Object arg2) { delegate().trace(marker, format, arg1, arg2); } public void trace(Marker marker, String format, Object... arguments) { delegate().trace(marker, format, arguments); } public void trace(Marker marker, String msg, Throwable t) { delegate().trace(marker, msg, t); } public boolean isDebugEnabled() { return delegate().isDebugEnabled(); } public void debug(String msg) { delegate().debug(msg); } public void debug(String format, Object arg) { delegate().debug(format, arg); } public void debug(String format, Object arg1, Object arg2) { delegate().debug(format, arg1, arg2); } public void debug(String format, Object... arguments) { delegate().debug(format, arguments); } public void debug(String msg, Throwable t) { delegate().debug(msg, t); } public boolean isDebugEnabled(Marker marker) { return delegate().isDebugEnabled(marker); } public void debug(Marker marker, String msg) { delegate().debug(marker, msg); } public void debug(Marker marker, String format, Object arg) { delegate().debug(marker, format, arg); } public void debug(Marker marker, String format, Object arg1, Object arg2) { delegate().debug(marker, format, arg1, arg2); } public void debug(Marker marker, String format, Object... arguments) { delegate().debug(marker, format, arguments); } public void debug(Marker marker, String msg, Throwable t) { delegate().debug(marker, msg, t); } public boolean isInfoEnabled() { return delegate().isInfoEnabled(); } public void info(String msg) { delegate().info(msg); } public void info(String format, Object arg) { delegate().info(format, arg); } public void info(String format, Object arg1, Object arg2) { delegate().info(format, arg1, arg2); } public void info(String format, Object... arguments) { delegate().info(format, arguments); } public void info(String msg, Throwable t) { delegate().info(msg, t); } public boolean isInfoEnabled(Marker marker) { return delegate().isInfoEnabled(marker); } public void info(Marker marker, String msg) { delegate().info(marker, msg); } public void info(Marker marker, String format, Object arg) { delegate().info(marker, format, arg); } public void info(Marker marker, String format, Object arg1, Object arg2) { delegate().info(marker, format, arg1, arg2); } public void info(Marker marker, String format, Object... arguments) { delegate().info(marker, format, arguments); } public void info(Marker marker, String msg, Throwable t) { delegate().info(marker, msg, t); } public boolean isWarnEnabled() { return delegate().isWarnEnabled(); } public void warn(String msg) { delegate().warn(msg); } public void warn(String format, Object arg) { delegate().warn(format, arg); } public void warn(String format, Object arg1, Object arg2) { delegate().warn(format, arg1, arg2); } public void warn(String format, Object... arguments) { delegate().warn(format, arguments); } public void warn(String msg, Throwable t) { delegate().warn(msg, t); } public boolean isWarnEnabled(Marker marker) { return delegate().isWarnEnabled(marker); } public void warn(Marker marker, String msg) { delegate().warn(marker, msg); } public void warn(Marker marker, String format, Object arg) { delegate().warn(marker, format, arg); } public void warn(Marker marker, String format, Object arg1, Object arg2) { delegate().warn(marker, format, arg1, arg2); } public void warn(Marker marker, String format, Object... arguments) { delegate().warn(marker, format, arguments); } public void warn(Marker marker, String msg, Throwable t) { delegate().warn(marker, msg, t); } public boolean isErrorEnabled() { return delegate().isErrorEnabled(); } public void error(String msg) { delegate().error(msg); } public void error(String format, Object arg) { delegate().error(format, arg); } public void error(String format, Object arg1, Object arg2) { delegate().error(format, arg1, arg2); } public void error(String format, Object... arguments) { delegate().error(format, arguments); } public void error(String msg, Throwable t) { delegate().error(msg, t); } public boolean isErrorEnabled(Marker marker) { return delegate().isErrorEnabled(marker); } public void error(Marker marker, String msg) { delegate().error(marker, msg); } public void error(Marker marker, String format, Object arg) { delegate().error(marker, format, arg); } public void error(Marker marker, String format, Object arg1, Object arg2) { delegate().error(marker, format, arg1, arg2); } public void error(Marker marker, String format, Object... arguments) { delegate().error(marker, format, arguments); } public void error(Marker marker, String msg, Throwable t) { delegate().error(marker, msg, t); } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; SubstituteLogger that = (SubstituteLogger) o; if (!name.equals(that.name)) return false; return true; } @Override public int hashCode() { return name.hashCode(); } /** * Return the delegate logger instance if set. Otherwise, return a {@link NOPLogger} * instance. */ Logger delegate() { if(_delegate != null) { return _delegate; } if(createdPostInitialization) { return NOPLogger.NOP_LOGGER; } else { return getEventRecordingLogger(); } } private Logger getEventRecordingLogger() { if (eventRecodingLogger == null) { eventRecodingLogger = new EventRecodingLogger(this, eventQueue); } return eventRecodingLogger; } /** * Typically called after the {@link org.slf4j.LoggerFactory} initialization phase is completed. * @param delegate */ public void setDelegate(Logger delegate) { this._delegate = delegate; } public boolean isDelegateEventAware() { if (delegateEventAware != null) return delegateEventAware; try { logMethodCache = _delegate.getClass().getMethod("log", LoggingEvent.class); delegateEventAware = Boolean.TRUE; } catch (NoSuchMethodException e) { delegateEventAware = Boolean.FALSE; } return delegateEventAware; } public void log(LoggingEvent event) { if (isDelegateEventAware()) { try { logMethodCache.invoke(_delegate, event); } catch (IllegalAccessException e) { } catch (IllegalArgumentException e) { } catch (InvocationTargetException e) { } } } public boolean isDelegateNull() { return _delegate == null; } public boolean isDelegateNOP() { return _delegate instanceof NOPLogger; } }





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