Create mongodb BasicDBObject - Java Big Data

Java examples for Big Data:MongoDB

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Description

Create mongodb BasicDBObject

Demo Code


package util;/*from ww w  .ja  v a2 s  .  c o m*/

import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Set;

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.MongoClient;

public class StoreInMongo {

    public static DB getMongoDatabase(String host, int port, String database) {
        // To connect to mongodb server
        MongoClient mongoClient = null;
        DB db = null;
        try {
            mongoClient = new MongoClient(host, port);

            db = mongoClient.getDB(database);

        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return db;

    }

    public static BasicDBObject createDocObject(ArrayList<String> list) {

        int n = list.size();
        BasicDBObject doc = new BasicDBObject("Word", list.get(0));
        for (int i = 1; i < n; i++) {
            doc.append("meaning", list.get(i));
        }
        return doc;

    }

    public static void runStore() {

        int pages[] = { 36, 29, 54, 33, 24, 24, 17, 19, 26, 4, 3, 17, 27,
                10, 13, 43, 2, 30, 57, 28, 13, 8, 13, 1, 1, 1 };

        DB db = getMongoDatabase("localhost", 27017, "testDB");
        System.out.println("Connect to database successfully");

        for (int i = 0; i < 26; i++) {
            DBCollection coll = db.createCollection("words_started_with_"
                    + (char) ('a' + i), null);
            for (int j = 1; j <= pages[i]; j++) {
                String url = BuildURL.buildPageURL((char) ('a' + i), j);
                HashMap<String, String> map = ParsePage.parsePage(url);
                Set<String> set = map.keySet();
                for (String s : set) {
                    try {
                        ArrayList<String> meaning = RetrieveWord
                                .getMeaning(map.get(s));
                        coll.insert(createDocObject(meaning));

                    } catch (Exception e) {

                        System.out.println(e.getMessage());
                    }
                }
                System.out.println("Page " + j + " Completed");
            }
            System.out.println("Completed " + (char) ('a' + i));
        }

    }

    public static void main(String[] args) {

        runStore();
    }

}

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