view flys-backend/src/main/java/de/intevation/flys/model/SedimentYieldValue.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 8b910e3277b0
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.JoinColumn;
import javax.persistence.OneToOne;

import org.apache.log4j.Logger;


@Entity
@Table(name = "sediment_yield_values")
public class SedimentYieldValue
implements   Serializable
{
    private static Logger logger = Logger.getLogger(SedimentYieldValue.class);

    private Integer id;

    private SedimentYield sedimentYield;

    private Double station;
    private Double value;

    private Unit unit;


    public SedimentYieldValue() {
    }

    public SedimentYieldValue(
        SedimentYield sedimentYield,
        Double        station,
        Double        value
    ) {
        this.sedimentYield = sedimentYield;
        this.station       = station;
        this.value         = value;
    }

    @Id
    @SequenceGenerator(
        name           = "SEQUENCE_SEDIMENT_YIELD_VALuES_ID_SEQ",
        sequenceName   = "SEDIMENT_YIELD_VALUES_ID_SEQ",
        allocationSize = 1)
    @GeneratedValue(
        strategy  = GenerationType.SEQUENCE,
        generator = "SEQUENCE_SEDIMENT_YIELD_VALuES_ID_SEQ")
    @Column(name = "id")
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @OneToOne
    @JoinColumn(name = "sediment_yield_id" )
    public SedimentYield getSedimentYield() {
        return sedimentYield;
    }

    public void setSedimentYield(SedimentYield sedimentYield) {
        this.sedimentYield = sedimentYield;
    }

    @Column(name="station")
    public Double getStation() {
        return station;
    }

    public void setStation(Double station) {
        this.station = station;
    }

    @Column(name = "value")
    public Double getValue() {
        return value;
    }

    public void setValue(Double value) {
        this.value = value;
    }
}
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