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/*
 * Copyright (c) 2013, SRI International
 * All rights reserved.
 * Licensed under the The BSD 3-Clause License;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 * 
 * http://opensource.org/licenses/BSD-3-Clause
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the aic-util nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.sri.ai.util.log;

import ch.qos.logback.classic.pattern.ClassicConverter;
import ch.qos.logback.classic.spi.ILoggingEvent;

import com.google.common.annotations.Beta;

/**
 * A logback Custom Conversion Specifier that can be used in a pattern layout to pad
 * LogX trace message correctly and to suffix profiler information when
 * appropriate (i.e. when exiting a level in the trace). This can be configured
 * in a logback configuration file as follows:
 * 
 * 
 * <conversionRule conversionWord="logxtracemsg" converterClass="com.sri.ai.util.log.LogXTraceConverter" />
 * 
* * and used in a Pattern Layout in the following manner: * *
 * <Pattern>%50.50class{0}|%logxtracemsg%n</Pattern>
 * 
* * @author oreilly */ @Beta public class LogXTraceConverter extends ClassicConverter { @Override public String convert(ILoggingEvent event) { StringBuilder sb = new StringBuilder(); sb.append(padForTraceLevel(LogX.getTraceLevel(event.getLoggerName()))); Long profileInfo = LogX.getProfileInfo(event.getLoggerName()); if (null != profileInfo) { sb.append("["); // Convert nanoseconds to milliseconds sb.append(profileInfo / 1000000); sb.append("ms"); Long rootProfileInfo = LogX.getRootProfileInfo(event.getLoggerName()); if (null != rootProfileInfo) { sb.append(", "); sb.append(rootProfileInfo / 1000000); sb.append("ms total"); } sb.append("] "); } sb.append(event.getFormattedMessage()); return sb.toString(); } // // PRIVATE METHODS // private String padForTraceLevel(int traceLevel) { StringBuilder sb = new StringBuilder(); for (int i = 1; i < traceLevel; i++) { sb.append(" "); } return sb.toString(); } }




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