org.glassfish.grizzly.attributes.AttributeBuilderInitializer Maven / Gradle / Ivy

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package org.glassfish.grizzly.attributes;

import org.glassfish.grizzly.Grizzly;

import java.util.logging.Level;
import java.util.logging.Logger;

class AttributeBuilderInitializer {

    private static final String PROP = "org.glassfish.grizzly.DEFAULT_ATTRIBUTE_BUILDER";

    private static final Logger LOGGER = Grizzly.logger(AttributeBuilderInitializer.class);

    @SuppressWarnings("unchecked")
    static AttributeBuilder initBuilder() {
        final String className = System.getProperty(PROP);
        if (className != null) {
            try {
                Class builderClass = (Class)
                        Class.forName(className,
                                true,
                                AttributeBuilder.class.getClassLoader());
                return builderClass.newInstance();
            } catch (Exception e) {
                if (LOGGER.isLoggable(Level.SEVERE)) {
                    LOGGER.log(Level.SEVERE,
                            "Unable to load or create a new instance of AttributeBuilder {0}.  Cause: {1}",
                            new Object[]{className, e.getMessage()});
                }
                if (LOGGER.isLoggable(Level.FINE)) {
                    LOGGER.log(Level.FINE, e.toString(), e);
                }
                return new DefaultAttributeBuilder();
            }
        }
        return new DefaultAttributeBuilder();
    }

}