org.mongoste.core.impl.mongodb.MongoUtil.java Source code

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Here is the source code for org.mongoste.core.impl.mongodb.MongoUtil.java

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/*
 *    Copyright (c) 2010-2011 Manuel Polo (mrmx.org)
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    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 org.mongoste.core.impl.mongodb;

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Various MongoDB utility methods
 * @author mrmx
 */
public final class MongoUtil {
    private static final String JS_FN_ADD = "db.system.js.save( { _id : \"%s\" , value : %s } );";
    private static final String JS_FN_DEL = "db.system.js.remove( {_id: \"%s\"} );";

    private static Logger log = LoggerFactory.getLogger(MongoUtil.class);

    public static void dropCollections(DB db) {
        for (String collection : db.getCollectionNames()) {
            if (collection.startsWith("system")) {
                continue;
            }
            log.warn("Dropping collection {}.{}", db.getName(), collection);
            DBCollection col = db.getCollection(collection);
            col.drop();
        }
    }

    public static void addDBFunction(DB db, String functionName, String body) {
        log.info("Adding function {}.{} Function body:{}\n", new Object[] { db.getName(), functionName, body });
        db.eval(String.format(JS_FN_DEL, functionName));
        db.eval(String.format(JS_FN_ADD, functionName, body));
    }

    public static DBObject createDoc(Object... values) {
        if (values != null && values.length % 2 != 0) {
            throw new IllegalArgumentException("odd value array size");
        }
        DBObject doc = new BasicDBObject();
        if (values != null) {
            int size = values.length;
            for (int i = 0; i < size; i += 2) {
                doc.put(String.valueOf(values[i]), values[i + 1]);
            }
        }
        return doc;
    }

    public static BasicDBObject getChildDBObject(BasicDBObject source, String dotPath) {
        return getChildDBObject(source, dotPath, Integer.MAX_VALUE);
    }

    public static BasicDBObject getChildDBObject(BasicDBObject source, String dotPath, int maxDepth) {
        String[] path = dotPath.split("\\.");
        BasicDBObject result = source;
        for (String key : path) {
            if (result == null) {
                break;
            }
            result = (BasicDBObject) result.get(key);
            if (--maxDepth == 0) {
                break;
            }
        }
        return result;
    }

    public static void close(DBCursor dbc) {
        if (dbc != null) {
            dbc.close();
        }
    }

    public static void createIndexes(DBCollection collection, Object... indexes) {
        log.info("Indexing {} collection", collection.getFullName());
        long t = System.currentTimeMillis();
        for (Object index : indexes) {
            if (index instanceof String) {
                collection.ensureIndex((String) index);
            }
            if (index instanceof DBObject) {
                collection.ensureIndex((DBObject) index);
            }
        }
        log.info("Done indexing {} collection in {}ms", collection.getFullName(), System.currentTimeMillis() - t);
    }
}