edu.utn.frba.grupo5303.serverenviolibre.services.GeoPosicionamientoUsuariosService.java Source code

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Here is the source code for edu.utn.frba.grupo5303.serverenviolibre.services.GeoPosicionamientoUsuariosService.java

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package edu.utn.frba.grupo5303.serverenviolibre.services;

import amazon.dynamodb.config.GeoDataManager;
import amazon.dynamodb.config.GeoDataManagerConfiguration;
import amazon.dynamodb.model.DeletePointRequest;
import amazon.dynamodb.model.DeletePointResult;
import amazon.dynamodb.model.GeoPunto;
import amazon.dynamodb.model.PutPointRequest;
import amazon.dynamodb.model.PutPointResult;
import amazon.dynamodb.model.QueryRadiusRequest;
import amazon.dynamodb.model.QueryRadiusResult;
import amazon.dynamodb.util.GeoTableUtil;
import com.amazonaws.ClientConfiguration;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
import com.amazonaws.services.dynamodbv2.model.CreateTableRequest;
import edu.utn.frba.grupo5303.serverenviolibre.apis.GeoPosicionamientoUsuariosAPI;
import edu.utn.frba.grupo5303.serverenviolibre.beans.PosicionBean;
import edu.utn.frba.grupo5303.serverenviolibre.model.Posicion;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.map.ObjectMapper;
import org.springframework.stereotype.Service;

/**
 *
 * @author flpitu88
 */
@Service
public class GeoPosicionamientoUsuariosService implements GeoPosicionamientoUsuariosAPI {

    private GeoDataManagerConfiguration config;
    private GeoDataManager geoDataManager;
    private ObjectMapper mapper;
    private JsonFactory factory;

    public GeoPosicionamientoUsuariosService() {
        setupGeoDataManager();
        mapper = new ObjectMapper();
        factory = mapper.getJsonFactory();
    }

    private void setupGeoDataManager() {
        String tableName = "PosicionUsuarios";
        String regionName = "us-west-2";

        Region region = Region.getRegion(Regions.fromName(regionName));
        ClientConfiguration clientConfiguration = new ClientConfiguration().withMaxErrorRetry(20);

        AmazonDynamoDBClient ddb = new AmazonDynamoDBClient(new ProfileCredentialsProvider(), clientConfiguration);
        ddb.setRegion(region);

        config = new GeoDataManagerConfiguration(ddb, tableName);
        geoDataManager = new GeoDataManager(config);
    }

    @Override
    public void inicializarTabla() {
        setupGeoDataManager();

        GeoDataManagerConfiguration config = geoDataManager.getGeoDataManagerConfiguration();

        CreateTableRequest createTableRequest = GeoTableUtil.getCreateTableRequest(config);
        config.getDynamoDBClient().createTable(createTableRequest);
    }

    @Override
    public void guardarPosicion(Posicion p, String timeStamp, Integer idUsuario) {
        GeoPunto geoPoint = new GeoPunto(p.getLatitud(), p.getLongitud());
        AttributeValue rangeKeyAttributeValue = new AttributeValue().withS(UUID.randomUUID().toString());
        AttributeValue usuarioAttribute = new AttributeValue().withN(idUsuario.toString());
        AttributeValue timeStampAttribute = new AttributeValue().withS(timeStamp);

        PutPointRequest putPointRequest = new PutPointRequest(geoPoint, rangeKeyAttributeValue);
        putPointRequest.getPutItemRequest().addItemEntry("usuarioId", usuarioAttribute);
        putPointRequest.getPutItemRequest().addItemEntry("timeStamp", timeStampAttribute);

        PutPointResult putPointResult = geoDataManager.putPoint(putPointRequest);
        p.setRangeKey(putPointRequest.getRangeKeyValue().getS());
    }

    @Override
    public List<Integer> getPosicionesCercanas(PosicionBean pos, double radioEnMetros) throws IOException {
        GeoPunto centerPoint = new GeoPunto(pos.getLatitud(), pos.getLongitud());

        List<String> attributesToGet = new ArrayList<String>();
        attributesToGet.add(config.getRangeKeyAttributeName());
        attributesToGet.add(config.getGeoJsonAttributeName());
        attributesToGet.add("usuarioId");
        attributesToGet.add("timeStamp");

        QueryRadiusRequest queryRadiusRequest = new QueryRadiusRequest(centerPoint, radioEnMetros);
        queryRadiusRequest.getQueryRequest().setAttributesToGet(attributesToGet);
        QueryRadiusResult queryRadiusResult = geoDataManager.queryRadius(queryRadiusRequest);

        List<Integer> idsABuscar = new ArrayList<>();

        for (Map<String, AttributeValue> item : queryRadiusResult.getItem()) {
            String usuarioId = "";
            usuarioId = item.get("usuarioId").getN();
            idsABuscar.add(Integer.parseInt(usuarioId));
        }

        return idsABuscar;
    }

    @Override
    public void eliminarPosicionUsuario(Posicion posicion) {
        GeoPunto geoPoint = new GeoPunto(posicion.getLatitud(), posicion.getLongitud());
        AttributeValue rangeKeyAttributeValue = new AttributeValue().withS(posicion.getRangeKey());

        DeletePointRequest deletePointRequest = new DeletePointRequest(geoPoint, rangeKeyAttributeValue);
        DeletePointResult deletePointResult = geoDataManager.deletePoint(deletePointRequest);
    }

    @Override
    public void actualizarPosicion(Posicion anterior, Posicion nueva, Integer idUsuario, String timeStamp) {
        eliminarPosicionUsuario(anterior);
        guardarPosicion(nueva, timeStamp, idUsuario);
    }

}