Mercurial > dive4elements > river
view flys-backend/src/main/java/de/intevation/flys/model/GrainFraction.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 | 3bd786772798 |
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 org.apache.log4j.Logger; @Entity @Table(name = "grain_fraction") public class GrainFraction implements Serializable { public static final String TOTAL = "total"; public static final String COARSE = "coarse"; public static final String FINE_MIDDLE = "fine_middle"; public static final String SAND = "sand"; public static final String SUSP_SAND = "susp_sand"; public static final String SUSP_SAND_BED = "susp_sand_bed"; public static final String SUSPENDED_SEDIMENT = "suspended_sediment"; private static Logger logger = Logger.getLogger(GrainFraction.class); private Integer id; private String name; private Double lower; private Double upper; public GrainFraction() { } public GrainFraction(String name, Double lower, Double upper) { this.name = name; this.lower = lower; this.upper = upper; } @Id @SequenceGenerator( name = "SEQUENCE_GRAIN_FRACTION_ID_SEQ", sequenceName = "GRAIN_FRACTION_ID_SEQ", allocationSize = 1) @GeneratedValue( strategy = GenerationType.SEQUENCE, generator = "SEQUENCE_GRAIN_FRACTION_ID_SEQ") @Column(name = "id") public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } @Column(name = "name" ) public String getName() { return name; } public void setName(String name) { this.name = name; } @Column(name = "lower") public Double getLower() { return lower; } public void setLower(Double lower) { this.lower = lower; } @Column(name = "upper") public Double getUpper() { return upper; } public void setUpper(Double upper) { this.upper = upper; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :