我使用的是spring
,spring-data
,spring-cronjobs
和java-mail
。我要求立即扫描my-sql
数据库中的表中的更改,并向管理员发送关于更改的邮件。如何使用spring动态跟踪数据库更改?
我正在做的所有事情是通过运行cronjob来扫描表中的所有更改,但这是一个沉重的过程,因为表与货币交易相关,并且消耗大量资源,从而导致应用程序变得太慢。
那么,有没有更好的过程,我可以跟踪数据库中的当前更改。例如,如果有任何方法在春季设置观察者来触发数据库更改过程,那么这将会很有帮助。
以下是我正在扫描的表的实体示例。
/** Import statements **/
@Entity
public class UserWalletTransaction {
@Id
@GeneratedValue
private Long Id;
private String toAccount;
@ManyToOne(fetch = FetchType.LAZY)
User user;
@ManyToOne(fetch = FetchType.LAZY)
Wallet wallet;
private String senderOrMobile;
private String benificiaryName;
private String beniMobile;
private Double transferAmount;
private Double sTax;
private Double charge;
private Double netAmount;
private String apiTId;
private String apiComment;
private String agentId;
private Double apiSTax;
private Double apiCharge;
private Double apiNetAmount;
private Double apiBalanceAmount;
private String transactionMode;
private String bankName;
private String userTrackId;
private String referenceNumber;
private String operatorDescription;
private String mobileNumber;
private String rechargeDateTime;
private String operatorTransactionId;
private String hermesPnr;
private String utId;
private String status;
private Double previousAmount;
private Double balanceAmount;
private Double amountTransacted;
private String transactionType;
private boolean isRaised;
private boolean isRefunded;
@Column(name = "created_by")
private String createdBy;
@Column(name = "created_date")
private Date createdDate;
@Column(name = "updated_by")
private String updatedBy;
@Column(name = "updated_date")
private Date updatedDate;
private String operationPerformed;
@OneToOne
private UserWalletTransaction relationalTransaction;
private String errorComments;
@OneToOne
private User debitUser;
@OneToOne
private User creditUser;
@OneToOne
private ServiceProvider serviceProvider;
@OneToOne
private RefundRequest refundRequests;
..... Getters and setters......
}
而以下是我用于扫描数据库后触发邮件的示例cron作业。
/** Import statements **/
@Component
@EnableScheduling
public class ValidateCron {
@Autowired
RechargeService rechargeService;
@Scheduled(fixedDelay = 2)
public void demoServiceMethod() {
// Perform tasks related to scan and track the number of records added //after the previous scan. Fire a mail if any change in the database is found.
}
}
请分享我可以提高此功能性能的任何方法。提前致谢。
你有没有试过绕过hibernate拦截器? https://docs.jboss.org/hibernate/orm/4.0/manual/en-US/html/events.html – GPI
感谢您的信息。这似乎很有帮助。我会尝试一些例子。如果你可以请提供一些例子,这将是有益的。 –
为什么你不使用触发器呢?看起来像比每次扫描表格更好的解决方案。 –