Mercurial > dive4elements > river
view flys-backend/src/main/java/de/intevation/flys/model/SedimentYield.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 | 71175502d868 |
children |
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package de.intevation.flys.model; import java.io.Serializable; import java.util.ArrayList; import java.util.List; 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.JoinColumn; import javax.persistence.OneToOne; import org.apache.log4j.Logger; @Entity @Table(name = "sediment_yield") public class SedimentYield implements Serializable { private static Logger logger = Logger.getLogger(SedimentYield.class); private Integer id; private River river; private GrainFraction grainFraction; private Unit unit; private TimeInterval timeInterval; private String description; private List<SedimentYieldValue> values; public SedimentYield() { this.values = new ArrayList<SedimentYieldValue>(); } public SedimentYield(River river, Unit unit, TimeInterval timeInterval) { this(); this.river = river; this.unit = unit; this.timeInterval = timeInterval; } public SedimentYield( River river, Unit unit, TimeInterval timeInterval, GrainFraction grainFraction ) { this(river, unit, timeInterval); this.grainFraction = grainFraction; } public SedimentYield( River river, Unit unit, TimeInterval timeInterval, GrainFraction grainFraction, String description ) { this(river, unit, timeInterval, grainFraction); this.description = description; } @Id @SequenceGenerator( name = "SEQUENCE_SEDIMENT_YIELD_ID_SEQ", sequenceName = "SEDIMENT_YIELD_ID_SEQ", allocationSize = 1) @GeneratedValue( strategy = GenerationType.SEQUENCE, generator = "SEQUENCE_SEDIMENT_YIELD_ID_SEQ") @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; } @OneToOne @JoinColumn(name="grain_fraction_id") public GrainFraction getGrainFraction() { return grainFraction; } public void setGrainFraction(GrainFraction grainFraction) { this.grainFraction = grainFraction; } @OneToOne @JoinColumn(name = "unit_id") public Unit getUnit() { return unit; } public void setUnit(Unit unit) { this.unit = unit; } @OneToOne @JoinColumn(name = "time_interval_id") public TimeInterval getTimeInterval() { return timeInterval; } public void setTimeInterval(TimeInterval timeInterval) { this.timeInterval = timeInterval; } @Column(name = "description") public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :