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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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package org.jgroups.logging;

import org.jgroups.Global;


/**
 * Factory that creates {@link Log} instances.
 *
 * @author Manik Surtani
 * @author Bela Ban
 * @since 4.0
 */
public class LogFactory {
    public static final boolean    IS_LOG4J2_AVAILABLE; // log4j2 is the default
    protected static final boolean USE_JDK_LOGGER;

    protected static CustomLogFactory custom_log_factory;


    static {
        String customLogFactoryClass=System.getProperty(Global.CUSTOM_LOG_FACTORY);
        CustomLogFactory customLogFactoryX=null;
        if(customLogFactoryClass != null) {
            try {
                customLogFactoryX=(CustomLogFactory)Class.forName(customLogFactoryClass).newInstance();
            }
            catch(Exception e) {
                throw new RuntimeException(e);
            }
        }

        custom_log_factory=customLogFactoryX;
        USE_JDK_LOGGER=isPropertySet(Global.USE_JDK_LOGGER);
        IS_LOG4J2_AVAILABLE=isAvailable("org.apache.logging.log4j.core.Logger");
    }

    public static CustomLogFactory getCustomLogFactory() {
        return custom_log_factory;
    }

    public static void setCustomLogFactory(CustomLogFactory factory) {
        custom_log_factory=factory;
    }

    public static String loggerType() {
        if(USE_JDK_LOGGER)      return "jdk";
        if(IS_LOG4J2_AVAILABLE) return "log4j2";
        return "jdk";
    }

    protected static boolean isAvailable(String classname) {
        try {
            return Class.forName(classname) != null;
        }
        catch(ClassNotFoundException cnfe) {
            return false;
        }
    }

    protected static boolean isPropertySet(String property_name) {
        try {
            return Boolean.parseBoolean(System.getProperty(property_name));
        }
        catch(Throwable t) {
            return false;
        }
    }

    public static Log getLog(Class clazz) {
        if(custom_log_factory != null)
            return custom_log_factory.getLog(clazz);

        if(USE_JDK_LOGGER)
            return new JDKLogImpl(clazz);

        if(IS_LOG4J2_AVAILABLE)
            return new Log4J2LogImpl(clazz);

        return new JDKLogImpl(clazz);
    }

    public static Log getLog(String category) {
        if(custom_log_factory != null)
            return custom_log_factory.getLog(category);

        if(USE_JDK_LOGGER)
            return new JDKLogImpl(category);

        if(IS_LOG4J2_AVAILABLE)
            return new Log4J2LogImpl(category);

        return new JDKLogImpl(category);
    }
}