view flys-backend/src/main/java/de/intevation/flys/model/FlowVelocityMeasurement.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 cc6323401643
children
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package de.intevation.flys.model;

import java.io.Serializable;
import java.util.List;

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 javax.persistence.OneToMany;

import org.apache.log4j.Logger;


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

    private Integer id;

    private River river;

    private String description;

    private List<FlowVelocityMeasurementValue> values;


    public FlowVelocityMeasurement() {
    }


    public FlowVelocityMeasurement(River river, String description) {
        this.river       = river;
        this.description = description;
    }

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

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

    @OneToOne
    @JoinColumn(name = "river_id" )
    public River getRiver() {
        return river;
    }

    public void setRiver(River river) {
        this.river = river;
    }

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

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

    @OneToMany
    @JoinColumn(name = "measurements_id")
    public List<FlowVelocityMeasurementValue> getValues() {
        return values;
    }

    public void setValues(List<FlowVelocityMeasurementValue> values) {
        this.values = values;
    }

    public void addValue(FlowVelocityMeasurementValue value) {
        this.values.add(value);
    }
}
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