http://logback.qos.ch/logback-classic: logback-classic module (QOS.ch)
  • Ceki Gulcu
  • Joern Huxhorn 
Logback: the reliable, generic, fast and flexible logging framework.
Copyright (C) 1999-2015, QOS.ch. All rights reserved.
This program and the accompanying materials are dual-licensed under
either the terms of the Eclipse Public License v1.0 as published by
the Eclipse Foundation
  or (per the licensee's choosing)
under the terms of the GNU Lesser General Public License version 2.1
as published by the Free Software Foundation.

/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.classic.gaffer;

import ch.qos.logback.classic.ClassicConstants;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.core.status.ErrorStatus;
import ch.qos.logback.core.status.StatusManager;

import java.io.File;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.net.URL;


Author:Ceki Gülcü
/**
 * @author Ceki Gülcü
 */
public class GafferUtil {

    private static String ERROR_MSG = "Failed to instantiate " + ClassicConstants.GAFFER_CONFIGURATOR_FQCN;

    public static void runGafferConfiguratorOn(LoggerContext loggerContext, Object origin, File configFile) {
        GafferConfigurator gafferConfigurator = GafferUtil.newGafferConfiguratorInstance(loggerContext, origin);
        if (gafferConfigurator != null) {
            gafferConfigurator.run(configFile);
        }
    }

    public static void runGafferConfiguratorOn(LoggerContext loggerContext, Object origin, URL configFile) {
        GafferConfigurator gafferConfigurator = GafferUtil.newGafferConfiguratorInstance(loggerContext, origin);
        if (gafferConfigurator != null) {
            gafferConfigurator.run(configFile);
        }
    }

    private static GafferConfigurator newGafferConfiguratorInstance(LoggerContext loggerContext, Object origin) {

        try {
            Class gcClass = Class.forName(ClassicConstants.GAFFER_CONFIGURATOR_FQCN);
            Constructor c = gcClass.getConstructor(LoggerContext.class);
            return (GafferConfigurator) c.newInstance(loggerContext);
        } catch (ClassNotFoundException e) {
            addError(loggerContext, origin, ERROR_MSG, e);
        } catch (NoSuchMethodException e) {
            addError(loggerContext, origin, ERROR_MSG, e);
        } catch (InvocationTargetException e) {
            addError(loggerContext, origin, ERROR_MSG, e);
        } catch (InstantiationException e) {
            addError(loggerContext, origin, ERROR_MSG, e);
        } catch (IllegalAccessException e) {
            addError(loggerContext, origin, ERROR_MSG, e);
        }
        return null;
    }

    private static void addError(LoggerContext context, Object origin, String msg) {
        addError(context, origin, msg, null);
    }

    private static void addError(LoggerContext context, Object origin, String msg, Throwable t) {
        StatusManager sm = context.getStatusManager();
        if (sm == null) {
            return;
        }
        sm.add(new ErrorStatus(msg, origin, t));
    }

}