SLF4J API is a simple API that allows to plug in any desired logging library at deployment time.

Here is the source code for SLF4J API 2.0.4. You can download its pre-compiled version slf4j-api-2.0.4.jar at SLF4J Download Website.

⏎ org/slf4j/event/EventRecordingLogger.java

package org.slf4j.event;

import java.util.Queue;

import org.slf4j.Marker;
import org.slf4j.helpers.LegacyAbstractLogger;
import org.slf4j.helpers.SubstituteLogger;

/**
 * 
 * This class is used to record events during the initialization phase of the
 * underlying logging framework. It is called by {@link SubstituteLogger}.
 * 
 * 
 * @author Ceki Gülcü
 * @author Wessel van Norel
 *
 */
public class EventRecordingLogger extends LegacyAbstractLogger {

    private static final long serialVersionUID = -176083308134819629L;

    String name;
    SubstituteLogger logger;
    Queue<SubstituteLoggingEvent> eventQueue;

    // as an event recording logger we have no choice but to record all events
    final static boolean RECORD_ALL_EVENTS = true;

    public EventRecordingLogger(SubstituteLogger logger, Queue<SubstituteLoggingEvent> eventQueue) {
        this.logger = logger;
        this.name = logger.getName();
        this.eventQueue = eventQueue;
    }

    public String getName() {
        return name;
    }

    public boolean isTraceEnabled() {
        return RECORD_ALL_EVENTS;
    }

    public boolean isDebugEnabled() {
        return RECORD_ALL_EVENTS;
    }

    public boolean isInfoEnabled() {
        return RECORD_ALL_EVENTS;
    }

    public boolean isWarnEnabled() {
        return RECORD_ALL_EVENTS;
    }

    public boolean isErrorEnabled() {
        return RECORD_ALL_EVENTS;
    }

    // WARNING: this method assumes that any throwable is properly extracted
    protected void handleNormalizedLoggingCall(Level level, Marker marker, String msg, Object[] args, Throwable throwable) {
        SubstituteLoggingEvent loggingEvent = new SubstituteLoggingEvent();
        loggingEvent.setTimeStamp(System.currentTimeMillis());
        loggingEvent.setLevel(level);
        loggingEvent.setLogger(logger);
        loggingEvent.setLoggerName(name);
        if (marker != null) {
            loggingEvent.addMarker(marker);
        }
        loggingEvent.setMessage(msg);
        loggingEvent.setThreadName(Thread.currentThread().getName());

        loggingEvent.setArgumentArray(args);
        loggingEvent.setThrowable(throwable);

        eventQueue.add(loggingEvent);

    }

    @Override
    protected String getFullyQualifiedCallerName() {
        return null;
    }
}

⏎ org/slf4j/event/EventRecordingLogger.java

Or download all of them as a single archive file:

File name: slf4j-api-2.0.4-sources.jar
File size: 70304 bytes
Release date: 2022-11-17
Download 

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