view flys-backend/src/main/java/de/intevation/flys/model/FlowVelocityMeasurementValue.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 ab7cf7789daf
children
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package de.intevation.flys.model;

import java.io.Serializable;
import java.math.BigDecimal;
import java.util.Date;

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;


/** Measured Flow Velocities. */
@Entity
@Table(name = "flow_velocity_measure_values")
public class FlowVelocityMeasurementValue
implements   Serializable
{
    private static Logger logger =
        Logger.getLogger(FlowVelocityMeasurementValue.class);

    private Integer id;

    private FlowVelocityMeasurement measurement;

    private BigDecimal station;
    private BigDecimal w;
    private BigDecimal q;
    private BigDecimal v;

    private Date datetime;

    private String description;

    /** Non-mapped class holding same values. */
    public static class FastFlowVelocityMeasurementValue {
        protected double station;
        protected double w;
        protected double q;
        protected double v;
        protected Date   datetime;
        protected String description;

        public FastFlowVelocityMeasurementValue(double station,
            double w, double q, double v, Date datetime, String description) {
            this.station = station;
            this.w       = w;
            this.q       = q;
            this.v       = v;
            this.datetime = datetime;
            this.description = description;
        }

        public double getStation() {
            return station;
        }

        public double getW() {
            return w;
        }

        public double getQ() {
            return q;
        }

        public double getV() {
            return v;
        }

        public Date getDatetime() {
            return datetime;
        }

        public String getDescription() {
            return description;
        }
    }


    public FlowVelocityMeasurementValue() {
    }


    public FlowVelocityMeasurementValue(
        FlowVelocityMeasurement measurement,
        Date                    datetime,
        BigDecimal              station,
        BigDecimal              w,
        BigDecimal              q,
        BigDecimal              v,
        String                  description
    ) {
        this.measurement = measurement;
        this.datetime    = datetime;
        this.station     = station;
        this.w           = w;
        this.q           = q;
        this.v           = v;
        this.description = description;
    }

    public static FastFlowVelocityMeasurementValue getUnmapped(
            double station, double w, double q, double v, Date datetime, String description) {
         return new FastFlowVelocityMeasurementValue(
             station, w, q, v, datetime, description);
    }

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

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

    @OneToOne
    @JoinColumn(name = "measurements_id")
    public FlowVelocityMeasurement getMeasurement() {
        return measurement;
    }

    public void setMeasurement(FlowVelocityMeasurement measurement) {
        this.measurement = measurement;
    }

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

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

    @Column(name = "datetime")
    public Date getDatetime() {
        return datetime;
    }

    public void setDatetime(Date datetime) {
        this.datetime = datetime;
    }

    @Column(name = "w")
    public BigDecimal getW() {
        return w;
    }

    public void setW(BigDecimal w) {
        this.w = w;
    }

    @Column(name = "q")
    public BigDecimal getQ() {
        return q;
    }

    public void setQ(BigDecimal q) {
        this.q = q;
    }

    @Column(name = "v")
    public BigDecimal getV() {
        return v;
    }

    public void setV(BigDecimal v) {
        this.v = v;
    }

    @Column(name = "description")
    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }
}
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