RHQ metrics domain model

gistfile1.java

public class MeasurementDataTrait extends MeasurementData {
    
    @Column(length = 255)
    private String value;

    // rest omitted for brevity
}


@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public abstract class MeasurementData implements Serializable {

    // The PK is a combo of timestamp and schedule id
    @EmbeddedId
    MeasurementDataPK id;

    @JoinColumn(name = "SCHEDULE_ID", insertable = false, updatable = false, nullable = false)
    @ManyToOne(fetch = FetchType.LAZY, optional = false)
    MeasurementSchedule schedule;

    // rest omitted for brevity
}


@Table(name = "RHQ_MEASUREMENT_SCHED", uniqueConstraints = { 
        @UniqueConstraint(columnNames = { "DEFINITION", "RESOURCE_ID" }) })
public class MeasurementSchedule implements Serializable {

    @Id
    private int id;

    @JoinColumn(name = "DEFINITION")
    @ManyToOne(fetch = FetchType.EAGER)
    private MeasurementDefinition definition;

    @JoinColumn(name = "RESOURCE_ID", referencedColumnName = "ID", nullable = false)
    @ManyToOne(fetch = FetchType.LAZY)
    private Resource resource;

    @Column(name = "COLL_INTERVAL")
    private long interval;

    @Column(name = "ENABLED")
    private boolean enabled;

    // rest omitted for brevity
}

@Table(name = "RHQ_MEASUREMENT_DEF")
public class MeasurementDefinition implements Serializable {
@Column(name = "ID", nullable = false)
    
    @Id
    private int id;

    @JoinColumn(name = "RESOURCE_TYPE_ID", referencedColumnName = "ID", nullable = false)
    @ManyToOne(fetch = FetchType.LAZY)
    private ResourceType resourceType;

    @Column(length = 100, nullable = false)
    private String name;

    @Column(name = "DISPLAY_NAME")
    private String displayName;

    /**
     * Type of this Metric (Availability, Throughput, ...)
     */
    @Enumerated(EnumType.ORDINAL)
    private MeasurementCategory category;

    /**
     * Concrete schedules for this metric
     */
    @OneToMany(mappedBy = "definition")
    List<measurementschedule> schedules = new ArrayList<measurementschedule>();

    /**
     * Measurement unit in which this metric is taken
     */
    @Enumerated(EnumType.ORDINAL)
    private MeasurementUnits units;

    /**
     * How are measurement values going to trend (monotonically increasing, ... )
     */
    @Column(name = "NUMERIC_TYPE")
    @Enumerated(EnumType.ORDINAL)
    private NumericType numericType;

    /**
     * The kind of measurement data being collected
     */
    @Column(name = "DATA_TYPE")
    @Enumerated(EnumType.ORDINAL)
    private DataType dataType;

    /**
     * How are values going to be displayed
     */
    @Column(name = "DISPLAY_TYPE")
    @Enumerated(EnumType.ORDINAL)
    private DisplayType displayType;

    /**
     * Is this metric schedule enabled by default
     */
    @Column(name = "DEFAULT_ON")
    private boolean defaultOn;

    /**
     * What is the default gathering interval
     */
    @Column(name = "DEFAULT_INTERVAL")
    private long defaultInterval;

    @Column(name = "DESCRIPTION")
    private String description;

    // rest omitted for brevity
}