Mercurial > dive4elements > river
view flys-backend/src/main/java/de/intevation/flys/model/Annotation.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 | 8076f6a689d0 |
children |
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package de.intevation.flys.model; import java.io.Serializable; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Table; import javax.persistence.GeneratedValue; import javax.persistence.Column; import javax.persistence.SequenceGenerator; import javax.persistence.GenerationType; import javax.persistence.OneToOne; import javax.persistence.JoinColumn; @Entity @Table(name = "annotations") public class Annotation implements Serializable { private Integer id; private Range range; private Attribute attribute; private Position position; private Edge edge; private AnnotationType type; public Annotation() { } public Annotation( Range range, Attribute attribute, Position position, Edge edge, AnnotationType type ) { this.range = range; this.attribute = attribute; this.position = position; this.edge = edge; this.type = type; } @Id @SequenceGenerator( name = "SEQUENCE_ANNOTATIONS_ID_SEQ", sequenceName = "ANNOTATIONS_ID_SEQ", allocationSize = 1) @GeneratedValue( strategy = GenerationType.SEQUENCE, generator = "SEQUENCE_ANNOTATIONS_ID_SEQ") @Column(name = "id") public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } @OneToOne @JoinColumn(name = "range_id") public Range getRange() { return range; } public void setRange(Range range) { this.range = range; } @OneToOne @JoinColumn(name = "attribute_id") public Attribute getAttribute() { return attribute; } public void setAttribute(Attribute attribute) { this.attribute = attribute; } @OneToOne @JoinColumn(name = "position_id") public Position getPosition() { return position; } public void setPosition(Position position) { this.position = position; } @OneToOne @JoinColumn(name = "edge_id") public Edge getEdge() { return edge; } public void setEdge(Edge edge) { this.edge = edge; } @OneToOne @JoinColumn(name = "type_id") public AnnotationType getType() { return type; } public void setType(AnnotationType type) { this.type = type; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :