java - 如何在 JPA 中动态更改架构名称

Question

我正在使用 JPA 查询 Flyway_schema_history 以打印已执行迁移的报告。 Flyway_schema_history 的结构在我的 Postgresql 数据库中的所有模式中重复。另外，我在运行程序时将架构名称作为参数传递。我使用的是 Java 10。

我在 JPA 中创建了这个实体。

@Entity
@Table(name = "flyway_schema_history", schema="this_should_be dynamic")
public class FlywaySchemaHistoryGeneric {

    @Id
    @Column(name="installed_rank")
    private Integer installedRank;

    @Column(name="version")
    private String version;

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

    @Column(name="type")
    private String type;

    @Column(name="script")
    private String script;

    @Column(name="checksum")
    private Integer checksum;

    @Column(name="installed_by")
    private String installedBy;

    @Column(name="installed_on")
    private Date installedOn;

    @Column(name="execution_time")
    private Integer executionTime;

    @Column(name="success")
    private Boolean success;


    public Integer getInstalledRank() {
        return installedRank;
    }

    public void setInstalledRank(Integer installedRank) {
        this.installedRank = installedRank;
    }

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }

    public String getDescription() {
        return description;
    }

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

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getScript() {
        return script;
    }

    public void setScript(String script) {
        this.script = script;
    }

    public Integer getChecksum() {
        return checksum;
    }

    public void setChecksum(Integer checksum) {
        this.checksum = checksum;
    }

    public String getInstalledBy() {
        return installedBy;
    }

    public void setInstalledBy(String installedBy) {
        this.installedBy = installedBy;
    }

    public Date getInstalledOn() {
        return installedOn;
    }

    public void setInstalledOn(Date installedOn) {
        this.installedOn = installedOn;
    }

    public Integer getExecutionTime() {
        return executionTime;
    }

    public void setExecutionTime(Integer executionTime) {
        this.executionTime = executionTime;
    }

    public Boolean getSuccess() {
        return success;
    }

    public void setSuccess(Boolean success) {
        this.success = success;
    }
}

我试图使用 FlywaySchemaHistoryGeneric.class.getAnnotation 来更改运行时的值，但没有成功，但我认为这应该是一种简单的方法。如何使 @table 中的模式变得动态？

Answer 1

我猜你无法在运行时修改它，因为注释是只读的。您可以为每个架构创建一个数据源，并选择其中之一来根据您的规则保留实体。