de.dennishoersch.web.springframework.profile.SetProfileContextListener.java Source code

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Here is the source code for de.dennishoersch.web.springframework.profile.SetProfileContextListener.java

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/*
 * Copyright 2012-2013 Dennis Hrsch.
 *
 * 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 de.dennishoersch.web.springframework.profile;

import org.apache.log4j.Logger;
import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.web.context.ConfigurableWebApplicationContext;

import de.dennishoersch.util.inspection.InstanceCollector;

/**
 * 
 * @author hoersch
 */
public class SetProfileContextListener implements ApplicationContextInitializer<ConfigurableApplicationContext> {

    private final Logger logger = Logger.getLogger(getClass());

    @Override
    public void initialize(ConfigurableApplicationContext applicationContext) {

        if (!(applicationContext instanceof ConfigurableWebApplicationContext)) {
            logger.error("ApplicationContext is no WebApplicationContext! (" + applicationContext.getClass() + ")");
            return;
        }

        addProfiles((ConfigurableWebApplicationContext) applicationContext, allProfiles());
        // applicationContext.getEnvironment().addActiveProfile("WEB");
    }

    private Iterable<Profile> allProfiles() {
        InstanceCollector<Profile> instanceCollector = new InstanceCollector<>(Profile.class, "");
        return instanceCollector.instances();
    }

    private void addProfiles(ConfigurableWebApplicationContext applicationContext, Iterable<Profile> profiles) {
        for (Profile profile : profiles) {
            if (profile.isActive(applicationContext)) {
                logger.debug(String.format("Profile '%s' is active.", profile.name()));
                applicationContext.getEnvironment().addActiveProfile(profile.name());
                profile.init();
            }
        }
    }

    /**
     * Definition of a profile.
     */
    public interface Profile {

        /**
         * @param applicationContext
         * @return whether this profile is active
         */
        boolean isActive(ConfigurableWebApplicationContext applicationContext);

        /**
         * Hook to implement profile dependent initialization.
         */
        void init();

        /**
         * @return the name of this profile
         */
        String name();

    }
}