org.restheart.db.PropsFixer.java Source code

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Here is the source code for org.restheart.db.PropsFixer.java

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/*
 * RESTHeart - the data REST API server
 * Copyright (C) 2014 - 2015 SoftInstigate Srl
 * 
 * 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 org.restheart.db;

import com.mongodb.BasicDBObject;
import com.mongodb.CommandFailureException;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBObject;
import com.mongodb.MongoException;
import org.restheart.handlers.RequestContext;
import java.time.Instant;
import org.bson.types.ObjectId;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author Andrea Di Cesare <andrea@softinstigate.com>
 */
public class PropsFixer {

    private final Database dbsDAO;

    private static final Logger LOGGER = LoggerFactory.getLogger(PropsFixer.class);

    public PropsFixer() {
        dbsDAO = new DbsDAO();
    }

    /**
     *
     * @param dbName
     * @param collName
     * @return
     * @throws MongoException
     */
    public boolean addCollectionProps(String dbName, String collName) throws MongoException {

        DBObject dbmd = dbsDAO.getDatabaseProperties(dbName, false);

        if (dbmd == null) {
            // db must exists with properties
            return false;
        }

        DBObject md = dbsDAO.getCollectionProperties(dbName, collName, false);

        if (md != null) // properties exists
        {
            return false;
        }

        // check if collection has data
        DB db = dbsDAO.getDB(dbName);

        if (!db.collectionExists(collName)) {
            return false;
        }

        // ok, create the properties
        DBObject properties = new BasicDBObject();

        ObjectId timestamp = new ObjectId();
        Instant now = Instant.ofEpochSecond(timestamp.getTimestamp());

        properties.put("_id", "_properties.".concat(collName));
        properties.put("_created_on", now.toString());
        properties.put("_etag", timestamp);

        DBCollection propsColl = dbsDAO.getCollection(dbName, "_properties");

        propsColl.insert(properties);

        LOGGER.info("properties added to {}/{}", dbName, collName);
        return true;
    }

    /**
     *
     * @param dbName
     * @return
     */
    public boolean addDbProps(String dbName) {
        if (!dbsDAO.existsDatabaseWithName(dbName)) {
            return false;
        }

        DBObject dbmd = dbsDAO.getDatabaseProperties(dbName, false);

        if (dbmd != null) // properties exists
        {
            return false;
        }

        // ok, create the properties
        DBObject properties = new BasicDBObject();

        ObjectId timestamp = new ObjectId();
        Instant now = Instant.ofEpochSecond(timestamp.getTimestamp());

        properties.put("_id", "_properties");
        properties.put("_created_on", now.toString());
        properties.put("_etag", timestamp);

        DBCollection coll = dbsDAO.getCollection(dbName, "_properties");

        coll.insert(properties);
        LOGGER.info("properties added to {}", dbName);
        return true;
    }

    /**
     *
     */
    public void fixAllMissingProps() {
        try {
            dbsDAO.getDatabaseNames().stream().filter(dbName -> !RequestContext.isReservedResourceDb(dbName))
                    .map(dbName -> {
                        try {
                            addDbProps(dbName);
                        } catch (Throwable t) {
                            LOGGER.error("error fixing _properties of db {}", dbName, t);
                        }
                        return dbName;
                    }).forEach(dbName -> {
                        DB db = dbsDAO.getDB(dbName);

                        dbsDAO.getCollectionNames(db).stream().filter(
                                collectionName -> !RequestContext.isReservedResourceCollection(collectionName))
                                .forEach(collectionName -> {
                                    try {
                                        addCollectionProps(dbName, collectionName);
                                    } catch (Throwable t) {
                                        LOGGER.error(
                                                "error checking the collection {}/{} for valid _properties. note that a request to it will result on NOT_FOUND",
                                                dbName, collectionName, t);
                                    }
                                });
                    });
        } catch (CommandFailureException cfe) {
            Object errmsg = cfe.getCommandResult().get("errmsg");

            if (errmsg != null && errmsg instanceof String
                    && ("unauthorized".equals(errmsg) || ((String) errmsg).contains("not authorized"))) {
                LOGGER.error(
                        "error looking for dbs and collections with missing _properties due to insuffient mongo user privileges. note that requests to dbs and collections with no _properties result on NOT_FOUND",
                        cfe);
            } else {
                LOGGER.error(
                        "eorro looking for dbs and collections with missing _properties. note that requests to dbs and collections with no _properties result on NOT_FOUND",
                        cfe);
            }
        } catch (MongoException mex) {
            LOGGER.error(
                    "eorro looking for dbs and collections with missing _properties. note that requests to dbs and collections with no _properties result on NOT_FOUND",
                    mex);
        }
    }
}