com.jaspersoft.mongodb.importer.MongoDbSimpleImporter.java Source code

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Here is the source code for com.jaspersoft.mongodb.importer.MongoDbSimpleImporter.java

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/*
 * Copyright (C) 2005 - 2012 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com.
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * 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 com.jaspersoft.mongodb.importer;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import net.sf.jasperreports.engine.JRException;

import org.apache.log4j.Logger;
import org.springframework.core.io.Resource;

import com.jaspersoft.mongodb.connection.MongoDbConnection;
import com.mongodb.BasicDBList;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBObject;
import com.mongodb.MongoException;
import com.mongodb.util.JSON;

/**
 * 
 * @author Eric Diaz
 * 
 */
public class MongoDbSimpleImporter {
    private final Logger logger = Logger.getLogger(MongoDbSimpleImporter.class);

    public MongoDbSimpleImporter(String mongoURI, String collectionName, Resource scriptResource)
            throws JRException {
        this(mongoURI, null, null, collectionName, scriptResource);
    }

    public MongoDbSimpleImporter(String mongoURI, String username, String password, String collectionName,
            Resource scriptResource) throws JRException {
        MongoDbConnection connection = new MongoDbConnection(mongoURI, username, password);
        populate(connection, collectionName, scriptResource);
    }

    private void populate(MongoDbConnection connection, String collectionName, Resource scriptResource)
            throws JRException {
        DBCollection collection = null;
        DB mongoDatabase = null;
        try {
            mongoDatabase = connection.getMongoDatabase();
            if (!mongoDatabase.collectionExists(collectionName)) {
                logger.info("Collection \"" + collectionName + "\" doesn't exist");
                DBObject options = new BasicDBObject("capped", false);
                collection = mongoDatabase.createCollection(collectionName, options);
            } else {
                logger.info("Collection \"" + collectionName + "\" exists");
                collection = mongoDatabase.getCollectionFromString(collectionName);
                collection.drop();
                logger.info("Collection \"" + collectionName + "\" was cleaned up");
            }
        } catch (MongoException e) {
            logger.error(e);
        }

        if (mongoDatabase == null) {
            throw new JRException(
                    "Failed connection to mongoDB database: " + connection.getMongoURIObject().getDatabase());
        }

        FileInputStream fileInputStream = null;
        InputStreamReader inputStreamReader = null;
        BufferedReader reader = null;
        try {
            inputStreamReader = new InputStreamReader(scriptResource.getInputStream());
            reader = new BufferedReader(inputStreamReader);
            StringBuilder stringBuilder = new StringBuilder();
            String currentLine;
            while ((currentLine = reader.readLine()) != null) {
                stringBuilder.append(currentLine);
            }
            Object parseResult = JSON.parse(stringBuilder.toString());
            if (!(parseResult instanceof BasicDBList)) {
                throw new JRException(
                        "Unsupported type: " + parseResult.getClass().getName() + ". It must be a list");
            }
            BasicDBList list = (BasicDBList) parseResult;
            List<DBObject> objectsList = new ArrayList<DBObject>();
            for (int index = 0; index < list.size(); index++) {
                objectsList.add((DBObject) list.get(index));
            }
            collection.insert(objectsList);
            logger.info("Collection count: " + collection.count() + "\nSuccessfully populated collection: "
                    + collectionName);
        } catch (UnsupportedEncodingException e) {
            logger.error(e);
        } catch (IOException e) {
            logger.error(e);
        } finally {
            if (fileInputStream != null) {
                try {
                    fileInputStream.close();
                } catch (IOException e) {
                    logger.error(e);
                }
            }
            if (inputStreamReader != null) {
                try {
                    inputStreamReader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

}