jnidzwetzki/bboxdb

/*******************************************************************************
 *
 *    Copyright (C) 2015-2022 the BBoxDB project
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 *
 *******************************************************************************/
package org.bboxdb.networkproxy.handler;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;

import org.bboxdb.commons.math.Hyperrectangle;
import org.bboxdb.network.client.BBoxDB;
import org.bboxdb.network.client.BBoxDBCluster;
import org.bboxdb.network.client.future.client.TupleListFuture;
import org.bboxdb.networkproxy.ProxyConst;
import org.bboxdb.networkproxy.ProxyHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public abstract class AbstractRangeQueryHandler implements ProxyCommandHandler {

    /**
     * The Logger
     */
    private final static Logger logger = LoggerFactory.getLogger(RangeQueryHandler.class);

    @Override
    public void handleCommand(final BBoxDBCluster bboxdbClient, final InputStream socketInputStream,
            final OutputStream socketOutputStream) throws IOException {

        final String table = ProxyHelper.readStringFromServer(socketInputStream);
        final String boundingBoxString = ProxyHelper.readStringFromServer(socketInputStream);
        final Hyperrectangle bbox = Hyperrectangle.fromString(boundingBoxString);

        executeLogging(table, bbox);

        try {
            final BBoxDB connection = getConnection(bboxdbClient);
            final TupleListFuture tupleResult = connection.queryRectangle(table, bbox, new ArrayList<>());
            ProxyHelper.writeTupleResult(socketOutputStream, tupleResult);
        } catch(InterruptedException e) {
            logger.debug("Got interrupted exception while handling bboxdb call");
            Thread.currentThread().interrupt();
            socketOutputStream.write(ProxyConst.RESULT_FAILED);
        } catch (Exception e) {
            logger.error("Got exception while proessing bboxdb call", e);
            socketOutputStream.write(ProxyConst.RESULT_FAILED);
        }
    }

    /**
     * Perform the logging
     * @param table
     * @param bbox
     */
    protected abstract void executeLogging(final String table, final Hyperrectangle bbox);

    /**
     * Get the connection
     * @param bboxdbClient
     * @return
     */
    public abstract BBoxDB getConnection(final BBoxDBCluster bboxdbClient);


}