package com.ensarc.test;

import java.util.Date;

import org.osgi.service.log.LogService;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

@Service
public class TestLogging {

	@Autowired
	private LogService logService;	
	protected Logger logger = LoggerFactory.getLogger(this.getClass());

	@Scheduled(fixedDelay=5000)
	public void logInfo() {		
		System.out.println("Logging Sysout Info : " + new Date()); // appears in the main log		
		logger.info("Logging SLF4J Info : " + new Date()); // appears in the main log or application log if logback.xml in bundle
		logService.log( LogService.LOG_INFO, "Logging OSGI Info : " + new Date() ); // appears nowhere.
	}

	@Scheduled(fixedDelay=10000)
	public void logError() {
		System.err.println("Logging Syserr Info : " + new Date()); // appears in the main log		
		logger.error("Logging SLF4J Error : " + new Date()); // appears in the main log or application log if logback.xml in bundle		
		logService.log( LogService.LOG_ERROR, "Logging OSGI Error : " + new Date() ); // appears nowhere.
	}
}

<?xml version="1.0" encoding="UTF-8"?>
<beans ....>

	<context:component-scan base-package="com.ensarc.test" />
	<task:annotation-driven />

	<osgi:reference id="logService" interface="org.osgi.service.log.LogService" />
</beans>

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: com.ensarc.log.test
Bundle-SymbolicName: com.ensarc.log.test
Bundle-Version: 1.0.0
Bundle-RequiredExecutionEnvironment: JavaSE-1.6
Import-Package: org.slf4j,
  org.osgi.service.log
Import-Library: org.springframework.spring

<appender name="SIFTED_LOG_FILE" class="ch.qos.logback.classic.sift.SiftingAppender">
	<discriminator>
		<Key>applicationName</Key>
		<DefaultValue>virgo-server</DefaultValue>
	</discriminator>
	<sift>
		<appender name="${applicationName}_LOG_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
			<file>serviceability/logs/${applicationName}/log.log</file>
			<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
				<FileNamePattern>serviceability/logs/${applicationName}/log_%i.log</FileNamePattern>
				<MinIndex>1</MinIndex>
				<MaxIndex>4</MaxIndex>
			</rollingPolicy>
			<triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
				<MaxFileSize>10MB</MaxFileSize>
			</triggeringPolicy>
			<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
				<Pattern>[%d{yyyy-MM-dd HH:mm:ss.SSS}] %-5level %-28.28thread %-64.64logger{64} %X{medic.eventCode} %msg %ex%n</Pattern>
			</encoder>
		</appender>
	</sift>
</appender>

MDC.put("applicationName", "my.bundle.name");

package my.package;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.slf4j.MDC;
import org.springframework.osgi.context.BundleContextAware;

/**
 * This class is simply to set the MDC so that the LogBack service can sift logs to a separate file
 * 
 * @author Raji
 *
 */
public class SimpleClass implements BundleContextAware {
	
	@Override
	public void setBundleContext(BundleContext bndCtx) {
		Bundle bndl = bndCtx.getBundle();
		String name = bndl.getSymbolicName();
		String ver = bndl.getVersion().toString();
		MDC.put("applicationName", name + "-" + ver);		
	}
}

	<bean class="my.package.SimpleClass" />