001package ch.qos.logback.classic.model.processor;
002
003import ch.qos.logback.classic.LoggerContext;
004import ch.qos.logback.classic.model.LoggerContextListenerModel;
005import ch.qos.logback.classic.spi.LoggerContextListener;
006import ch.qos.logback.core.Context;
007import ch.qos.logback.core.model.Model;
008import ch.qos.logback.core.model.processor.ModelHandlerBase;
009import ch.qos.logback.core.model.processor.ModelHandlerException;
010import ch.qos.logback.core.model.processor.ModelInterpretationContext;
011import ch.qos.logback.core.spi.ContextAware;
012import ch.qos.logback.core.spi.LifeCycle;
013import ch.qos.logback.core.util.OptionHelper;
014
015public class LoggerContextListenerModelHandler extends ModelHandlerBase {
016    boolean inError = false;
017    LoggerContextListener lcl;
018
019    public LoggerContextListenerModelHandler(Context context) {
020        super(context);
021    }
022
023    static public ModelHandlerBase makeInstance(Context context, ModelInterpretationContext ic) {
024        return new LoggerContextListenerModelHandler(context);
025    }
026
027    @Override
028    protected Class<LoggerContextListenerModel> getSupportedModelClass() {
029        return LoggerContextListenerModel.class;
030    }
031
032    @Override
033    public void handle(ModelInterpretationContext mic, Model model) throws ModelHandlerException {
034        LoggerContextListenerModel lclModel = (LoggerContextListenerModel) model;
035
036        String className = lclModel.getClassName();
037        if (OptionHelper.isNullOrEmpty(className)) {
038            addError("Empty class name for LoggerContextListener");
039            inError = true;
040        } else {
041            className = mic.getImport(className);
042        }
043
044        try {
045            lcl = (LoggerContextListener) OptionHelper.instantiateByClassName(className, LoggerContextListener.class,
046                    context);
047
048            if (lcl instanceof ContextAware) {
049                ((ContextAware) lcl).setContext(context);
050            }
051
052            mic.pushObject(lcl);
053            addInfo("Adding LoggerContextListener of type [" + className + "] to the object stack");
054
055        } catch (Exception oops) {
056            inError = true;
057            addError("Could not create LoggerContextListener of type " + className + "].", oops);
058        }
059    }
060
061    @Override
062    public void postHandle(ModelInterpretationContext mic, Model model) throws ModelHandlerException {
063        if (inError) {
064            return;
065        }
066        Object o = mic.peekObject();
067
068        if (o != lcl) {
069            addWarn("The object on the top the of the stack is not the LoggerContextListener pushed earlier.");
070        } else {
071            if (lcl instanceof LifeCycle) {
072                ((LifeCycle) lcl).start();
073                addInfo("Starting LoggerContextListener");
074            }
075            ((LoggerContext) context).addListener(lcl);
076            mic.popObject();
077        }
078    }
079}