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>
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 :

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