Examples of org.slf4j.Logger

org.slf4j.Logger

The org.slf4j.Logger interface is the main user entry point of SLF4J API. It is expected that logging takes place through concrete implementations of this interface.

Typical usage pattern:

 import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class Wombat { final static Logger logger = LoggerFactory.getLogger(Wombat.class); Integer t; Integer oldT; public void setTemperature(Integer temperature) { oldT = t;         t = temperature; logger.debug("Temperature set to {}. Old temperature was {}.", t, oldT); if(temperature.intValue() > 50) { logger.info("Temperature has risen above 50 degrees."); } } }

@author Ceki Gülcü

    {
        lock.check();


        assert serviceDef != null;


        Logger logger = getServiceLogger(serviceDef.getServiceId());


        Orderer<ServiceDecorator> orderer = new Orderer<ServiceDecorator>(logger);


        for (Module module : moduleToServiceDefs.keySet())
        {

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    {
        lock.check();


        assert serviceDef != null;


        Logger logger = getServiceLogger(serviceDef.getServiceId());


        Orderer<ServiceAdvisor> orderer = new Orderer<ServiceAdvisor>(logger);


        for (Module module : moduleToServiceDefs.keySet())
        {

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            if (ctx != null && ctx.getAuthentication() != null) {
                auditMessage.append('[').append(ctx.getAuthentication().getName()).append(']').append(' ');
            }
            auditMessage.append(message);


            Logger logger = LoggerFactory.getLogger(auditLoggerName.toLoggerName());
            if (throwable == null) {
                logger.debug(auditMessage.toString());
            } else {
                logger.debug(auditMessage.toString(), throwable);
            }
        }
    }

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     */
    public void execute(final JobExecutionContext context) throws JobExecutionException {


        final JobDataMap data = context.getJobDetail().getJobDataMap();
        final Object job = data.get(QuartzScheduler.DATA_MAP_OBJECT);
        final Logger logger = (Logger)data.get(QuartzScheduler.DATA_MAP_LOGGER);


        // check run on information
        final String[] runOn = (String[])data.get(QuartzScheduler.DATA_MAP_RUN_ON);
        if ( runOn != null ) {
            if ( runOn.length == 1 && Scheduler.VALUE_RUN_ON_LEADER.equals(runOn[0])
                 || runOn.length == 1 && Scheduler.VALUE_RUN_ON_SINGLE.equals(runOn[0]) ) {
                if ( DISCOVERY_INFO_AVAILABLE.get() ) {
                    if ( !IS_LEADER.get() ) {
                        logger.debug("Excluding job {} with name {} and config {}.",
                                new Object[] {job, data.get(QuartzScheduler.DATA_MAP_NAME), runOn[0]});
                        return;
                    }
                } else {
                    logger.warn("No discovery info available. Executing job {} with name {} and config {} anyway.",
                            new Object[] {job, data.get(QuartzScheduler.DATA_MAP_NAME), runOn[0]});
                }
            } else { // sling IDs
                final String myId = SLING_ID;
                boolean schedule = false;
                if ( myId == null ) {
                    logger.warn("No Sling ID available. Executing job {} with name {} and config {} anyway.",
                            new Object[] {job, data.get(QuartzScheduler.DATA_MAP_NAME), Arrays.toString(runOn)});
                    schedule = true;
                } else {
                    for(final String id : runOn ) {
                        if ( myId.equals(id) ) {
                            schedule = true;
                            break;
                        }
                    }
                }
                if ( !schedule ) {
                    logger.debug("Excluding job {} with name {} and config {}.",
                            new Object[] {job, data.get(QuartzScheduler.DATA_MAP_NAME), Arrays.toString(runOn)});
                    return;
                }
            }
        }


        try {
            logger.debug("Executing job {} with name {}", job, data.get(QuartzScheduler.DATA_MAP_NAME));
            if (job instanceof org.apache.sling.commons.scheduler.Job) {
                @SuppressWarnings("unchecked")
                final Map<String, Serializable> configuration = (Map<String, Serializable>) data.get(QuartzScheduler.DATA_MAP_CONFIGURATION);
                final String name = (String) data.get(QuartzScheduler.DATA_MAP_NAME);


                final JobContext jobCtx = new JobContextImpl(name, configuration);
                ((org.apache.sling.commons.scheduler.Job) job).execute(jobCtx);
            } else if (job instanceof Runnable) {
                ((Runnable) job).run();
            } else {
                logger.error("Scheduled job {} is neither a job nor a runnable.", job);
            }
        } catch (final Throwable t) {
            // if this is a quartz exception, rethrow it
            if (t instanceof JobExecutionException) {
                throw (JobExecutionException) t;
            }
            // there is nothing we can do here, so we just log
            logger.error("Exception during job execution of " + job + " : " + t.getMessage(), t);
        }
    }

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    @Test
    public void testOrderForValueAnnotationField() {
        // make sure that that the correct injection is used
        // make sure that log is adapted from value map
        // and not coming from request attribute
        Logger logFromValueMap = LoggerFactory.getLogger(this.getClass());


        Map<String, Object> map = new HashMap<String, Object>();
        map.put("first", "first-value");
        map.put("log", logFromValueMap);
        ValueMap vm = new ValueMapDecorator(map);

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    }


    @Test
    public void testOSGiServiceField() throws InvalidSyntaxException {
        ServiceReference ref = mock(ServiceReference.class);
        Logger log = mock(Logger.class);
        when(bundleContext.getServiceReferences(Logger.class.getName(), null)).thenReturn(
                new ServiceReference[] { ref });
        when(bundleContext.getService(ref)).thenReturn(log);


        InjectorSpecificAnnotationModel model = factory.getAdapter(request, InjectorSpecificAnnotationModel.class);

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    @Test
    public void testOrderForValueAnnotationConstructor() {
        // make sure that that the correct injection is used
        // make sure that log is adapted from value map
        // and not coming from request attribute
        Logger logFromValueMap = LoggerFactory.getLogger(this.getClass());


        Map<String, Object> map = new HashMap<String, Object>();
        map.put("first", "first-value");
        map.put("log", logFromValueMap);
        ValueMap vm = new ValueMapDecorator(map);

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    }


    @Test
    public void testOSGiServiceConstructor() throws InvalidSyntaxException {
        ServiceReference ref = mock(ServiceReference.class);
        Logger log = mock(Logger.class);
        when(bundleContext.getServiceReferences(Logger.class.getName(), null)).thenReturn(
                new ServiceReference[] { ref });
        when(bundleContext.getService(ref)).thenReturn(log);


        org.apache.sling.models.testmodels.classes.constructorinjection.InjectorSpecificAnnotationModel model

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    }


    private void initializeLogbackManager(boolean immediateInit) throws InvalidSyntaxException {
        logManager = new LogbackManager(context);
        
        final Logger log = LoggerFactory.getLogger(getClass());
        if(immediateInit) {
            log.info("LogbackManager initialized at bundle startup");
        } else {
            log.info("LogbackManager initialized after waiting for Slf4j, {} msec after startup", System.currentTimeMillis() - startTime);
        }
    }

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        //In case logging system completely fails then log the message in System out
        //otherwise make it part of 'normal' logs
        if (!initSuccess) {
            System.out.println(sb.toString());
        } else {
            Logger logger = LoggerFactory.getLogger(SlingStatusPrinter.class);
            logger.info(sb.toString());
        }
    }

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