Mercurial > dive4elements > river
view flys-backend/src/main/java/de/intevation/flys/model/Floodmaps.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 | 8649e4ed01ec |
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.Geometry; import de.intevation.flys.backend.SessionHolder; @Entity @Table(name = "floodmaps") public class Floodmaps implements Serializable { private Integer id; private River river; private String name; private Integer kind; private Integer count; private BigDecimal diff; private BigDecimal area; private BigDecimal perimeter; private Geometry geom; public Floodmaps() { } @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 = "kind") public Integer getKind() { return kind; } public void setKind(Integer kind) { this.kind = kind; } @Column(name = "count") public Integer getCount() { return count; } public void setCount(Integer count) { this.count = count; } @Column(name = "diff") public BigDecimal getDiff() { return diff; } public void setDiff(BigDecimal diff) { this.diff = diff; } @Column(name = "area") public BigDecimal getArea() { return area; } public void setArea(BigDecimal area) { this.area = area; } @Column(name = "perimeter") public BigDecimal getPerimeter() { return perimeter; } public void setPerimeter(BigDecimal perimeter) { this.perimeter = perimeter; } @Column(name = "geom") @Type(type = "org.hibernatespatial.GeometryUserType") public Geometry getGeom() { return geom; } public void setGeom(Geometry geom) { this.geom = geom; } public static List<Floodmaps> getFloodmaps(int riverId, String name) { Session session = SessionHolder.HOLDER.get(); Query query = session.createQuery( "from Floodmaps 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 :