v7views.mongo.InitMongo.java Source code

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Here is the source code for v7views.mongo.InitMongo.java

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/**
 * Copyright (c) 2011, Thilo Planz. All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package v7views.mongo;

import java.io.File;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.apache.commons.io.FileUtils;

import v7views.v7db.BSONBackedObject;
import v7views.v7db.BSONBackedObjectLoader;

import com.mongodb.Mongo;
import com.mongodb.MongoURI;

public class InitMongo implements ServletContextListener {

    public void contextDestroyed(ServletContextEvent sce) {
        getMongo(sce.getServletContext()).close();
    }

    public void contextInitialized(ServletContextEvent sce) {

        try {
            BSONBackedObject conf = BSONBackedObjectLoader
                    .parse(FileUtils.readFileToString(new File("conf/v7views.json"), "UTF-8"), null);
            sce.getServletContext().setAttribute("v7views.config", conf);

            Mongo mongo = new Mongo();
            sce.getServletContext().setAttribute("mongo", mongo);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static Mongo getMongo(ServletContext context) {
        return (Mongo) context.getAttribute("mongo");
    }

    public static V7Collection getCollection(ServletContext context, String name) {
        BSONBackedObject conf = getConfig(context);
        Object data = conf.getField("collections." + name);
        if (data instanceof String) {
            MongoURI uri = new MongoURI((String) data);
            return new V7Collection(getMongo(context).getDB(uri.getDatabase()).getCollection(uri.getCollection()));
        }
        BSONBackedObject b = (BSONBackedObject) data;
        V7Collection base = getCollection(context, b.getStringField("collection"));
        return new V7Collection(base, b.getObjectField("filter"));
    }

    public static BSONBackedObject getConfig(ServletContext context) {
        return (BSONBackedObject) context.getAttribute("v7views.config");
    }

}