Mercurial > dive4elements > river
view flys-backend/src/main/java/de/intevation/flys/model/MainValue.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 | 407af2f1a364 |
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.OneToOne; import javax.persistence.JoinColumn; import javax.persistence.GenerationType; import java.math.BigDecimal; /** A Main or Extreme value of a rivers gauge. */ @Entity @Table(name = "main_values") public class MainValue implements Serializable { private Integer id; private Gauge gauge; private NamedMainValue mainValue; private BigDecimal value; private TimeInterval timeInterval; public MainValue() { } public MainValue( Gauge gauge, NamedMainValue mainValue, BigDecimal value, TimeInterval timeInterval ) { this.gauge = gauge; this.mainValue = mainValue; this.value = value; this.timeInterval = timeInterval; } @Id @SequenceGenerator( name = "SEQUENCE_MAIN_VALUES_ID_SEQ", sequenceName = "MAIN_VALUES_ID_SEQ", allocationSize = 1) @GeneratedValue( strategy = GenerationType.SEQUENCE, generator = "SEQUENCE_MAIN_VALUES_ID_SEQ") @Column(name = "id") public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } @OneToOne @JoinColumn(name = "gauge_id") public Gauge getGauge() { return gauge; } public void setGauge(Gauge gauge) { this.gauge = gauge; } @OneToOne @JoinColumn(name = "named_value_id") public NamedMainValue getMainValue() { return mainValue; } public void setMainValue(NamedMainValue mainValue) { this.mainValue = mainValue; } @Column(name = "value") // FIXME: type mapping needed? public BigDecimal getValue() { return value; } public void setValue(BigDecimal value) { this.value = value; } @OneToOne @JoinColumn(name = "time_interval_id") public TimeInterval getTimeInterval() { return timeInterval; } public void setTimeInterval(TimeInterval timeInterval) { this.timeInterval = timeInterval; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :