view flys-backend/src/main/java/de/intevation/flys/model/Building.java @ 5779:ebec12def170

Datacage: Add a pool of builders to make it multi threadable. XML DOM is not thread safe. Therefore the old implementation only allowed one thread to use the builder at a time. As the complexity of the configuration has increased over time this has become a bottleneck of the whole application because it took quiet some time to build a result. Furthermore the builder code path is visited very frequent. So many concurrent requests were piled up resulting in long waits for the users. To mitigate this problem a round robin pool of builders is used now. Each of the pooled builders has an independent copy of the XML template and can be run in parallel. The number of builders is determined by the system property 'flys.datacage.pool.size'. It defaults to 4.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 21 Apr 2013 12:48:09 +0200
parents 1564ca2cb224
children
line wrap: on
line source
package de.intevation.flys.model;

import java.io.Serializable;
import java.util.List;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
import javax.persistence.Table;

import org.hibernate.Session;
import org.hibernate.Query;
import org.hibernate.annotations.Type;

import com.vividsolutions.jts.geom.LineString;

import de.intevation.flys.backend.SessionHolder;


@Entity
@Table(name = "buildings")
public class Building
implements   Serializable
{
    private Integer    id;
    private River      river;
    private String     name;
    private LineString geom;

    public Building() {
    }


    @Id
    @Column(name = "id")
    public Integer getId() {
        return id;
    }


    public void setId(Integer id) {
        this.id = id;
    }


    @OneToOne
    @JoinColumn(name = "river_id")
    public River getRiver() {
        return river;
    }


    public void setRiver(River river) {
        this.river = river;
    }


    @Column(name = "name")
    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name;
    }


    @Column(name = "geom")
    @Type(type = "org.hibernatespatial.GeometryUserType")
    public LineString getGeom() {
        return geom;
    }


    public void setGeom(LineString geom) {
        this.geom = geom;
    }

    public static List<Building> getBuildings(int riverId, int kindId) {
        Session session = SessionHolder.HOLDER.get();

        Query query = session.createQuery(
            "from Building where river.id =:river_id and kind_id=:kind_id");
        query.setParameter("kind_id", kindId);
        query.setParameter("river_id", riverId);

        return query.list();
    }

    public static List<Building> getBuildings(int riverId, String name) {
        Session session = SessionHolder.HOLDER.get();

        Query query = session.createQuery(
            "from Building where river.id =:river_id and name=:name");
        query.setParameter("river_id", riverId);
        query.setParameter("name", name);

        return query.list();
    }
}
// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

http://dive4elements.wald.intevation.org