Mercurial > dive4elements > river
view flys-backend/src/main/java/de/intevation/flys/model/Floodmark.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> |
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date | Sun, 21 Apr 2013 12:48:09 +0200 |
parents | 559a009b3d72 |
children |
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package de.intevation.flys.model; import java.io.Serializable; import java.math.BigDecimal; 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.Point; import de.intevation.flys.backend.SessionHolder; @Entity @Table(name = "flood_marks") public class Floodmark implements Serializable { private Integer id; private River river; private Integer z; private Integer year; private BigDecimal km; private Point geom; public Floodmark() { } @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 = "z") public Integer getZ() { return z; } public void setZ(Integer z) { this.z = z; } @Column(name = "year") public Integer getYear() { return year; } public void setYear(Integer year) { this.year = year; } @Column(name = "km") public BigDecimal getKm() { return km; } public void setKm(BigDecimal km) { this.km = km; } @Column(name = "geom") @Type(type = "org.hibernatespatial.GeometryUserType") public Point getGeom() { return geom; } public void setGeom(Point geom) { this.geom = geom; } public static List<Floodmark> getFloodmarks(int riverId) { Session session = SessionHolder.HOLDER.get(); Query query = session.createQuery( "from Floodmark where river.id =:river_id"); query.setParameter("river_id", riverId); return query.list(); } public static List<Floodmark> getFloodmarks(int riverId, int year) { Session session = SessionHolder.HOLDER.get(); Query query = session.createQuery( "from Floodmark where river.id =:river_id and year = :year"); query.setParameter("river_id", riverId); query.setParameter("year", year); return query.list(); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :