RetrieveAnnotationProcessor.java

/*
 * Copyright 2013-2014 High-Level Technologies
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.zodiark.server.impl;

import org.atmosphere.annotation.Processor;
import org.atmosphere.config.AtmosphereAnnotation;
import org.atmosphere.cpr.AtmosphereFramework;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.zodiark.server.EventBus;
import org.zodiark.server.EventBusFactory;
import org.zodiark.server.annotation.Retrieve;
import org.zodiark.service.Service;

/**
 * Register Zodiark's {@link org.atmosphere.annotation.Processor} with Atmosphere so class annotated with {@link org.zodiark.server.annotation.On} will be instantiated and
 * managed by the Atmosphere's Annotation Processor.
 */
@AtmosphereAnnotation(Retrieve.class)
public class RetrieveAnnotationProcessor implements Processor<Service> {

    private final EventBus eventBus;
    private Logger logger = LoggerFactory.getLogger(RetrieveAnnotationProcessor.class);

    public RetrieveAnnotationProcessor() {
        eventBus = EventBusFactory.getDefault().eventBus();
    }


    @Override
    public void handle(AtmosphereFramework framework, Class<Service> annotatedClass) {

        Retrieve s = annotatedClass.getAnnotation(Retrieve.class);
        try {
            logger.info("Registering @Retrieve annotation {}", annotatedClass.getName());
            String[] values = s.value();
            for (String v : values) {
                eventBus.on(v, framework.newClassInstance(Service.class, annotatedClass));
            }
        } catch (Exception e) {
            logger.error("Unable to register {}", annotatedClass, e);
        }
    }
}