source: gs3-extensions/maori-lang-detection/src/org/greenstone/atea/MongoDBAccess.java@ 33622

package org.greenstone.atea;


import com.mongodb.client.MongoDatabase; 
import com.mongodb.MongoClient; 
import com.mongodb.MongoCredential;  

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.Properties;

import org.apache.log4j.Logger;


/** 
 * https://www.tutorialspoint.com/mongodb/mongodb_java.htm
 *
 * TO COMPILE:
 *    maori-lang-detection/src$
 *       javac -cp ".:../conf:../lib/*" org/greenstone/atea/MongoDBAccess.java
 *
 * TO RUN:
 *       java -cp ".:../conf:../lib/*" org.greenstone.atea.MongoDBAccess
 */
public class MongoDBAccess {

    private static Logger logger = Logger.getLogger(org.greenstone.atea.MongoDBAccess.class.getName());
    
    final static String HOST = "localhost";
    final static int PORT = 27017; // mongodb port
    final static String PROPS_FILENAME = "config.properties";
    final static String DB_NAME = "ateacrawldata";
    
    private String USERNAME;
    private String PASSWORD;


    public MongoDBAccess() throws Exception {
    boolean success = false;
    
    // Read in the username and password from our props file
    Properties props = new Properties();

    //File propsFile = new File(PROPS_FILENAME);
    //logger.debug("*** Conf props filename: " + propsFile.getAbsolutePath());
    try {
        props.load(getClass().getClassLoader().getResourceAsStream(PROPS_FILENAME));        
    } catch(Exception e) {
        logger.error(e);
    }
    
    
    USERNAME = props.getProperty("mongodb.user", "");
    if(USERNAME.equals("")) {
        USERNAME = "root";
        logger.warn("WARNING: No sensible value for mongodb.user specified in " + PROPS_FILENAME + " defaulting to: " + USERNAME);
            }
    PASSWORD = props.getProperty("mongodb.pwd");

    logger.debug("Got pwd: " + PASSWORD);
    
    if(PASSWORD != null && PASSWORD.equals("CHANGEME")) {
        
        success = false;
        throw new Exception("************ FATAL ERROR: Change DB password in properties file " + PROPS_FILENAME);       
    }
    }


    public void connectToDB() throws Exception {
    // Creating a Mongo client 
    MongoClient mongo = new MongoClient( HOST, PORT ); 
    
    // Creating Credentials 
    MongoCredential credential; 
    credential = MongoCredential.createCredential(USERNAME, DB_NAME, PASSWORD.toCharArray()); 
    System.out.println("Connected to the database successfully");  
    
    // Accessing the database 
    MongoDatabase database = mongo.getDatabase(DB_NAME); 
    //System.out.println("Credentials: "+ credential);
    }
    

    public static void main(String args[]) {
    try {
        MongoDBAccess mongodbCon = new MongoDBAccess();
        //mongodbCon.connectToDB();
    }catch(Exception e) {
        e.printStackTrace();
    }
    }
}