Log4j2 JPAAppender BLOB

Question

后2天log4j2战斗，Hibernate和Spring我终于JPAAppender工作..排序的..

我跟着这个例子：http://logging.apache.org/log4j/2.x/manual/appenders.html#JPAAppender

例子中的类创建一个表有这个结构：

CREATE TABLE `applicationLog` (
    `id` bigint(20) NOT NULL AUTO_INCREMENT, 
    `wrappedEvent` tinyblob, 
    PRIMARY KEY (`id`) 
) 

第一个问题是我不能记录任何东西，因为tinyblob太小了。我通过将tinyblob更改为largeblob来手动解决此问题。

第一个问题：有没有办法让类扩展BasicLogEventEntity来自己创建一个largeblob？

第二个问题：如何使用mysql客户端读取wrappedEvent？如何从日志中获取日志的纯文本？

感谢

Answer 1

所以我改变了实体如下，现在在db斑点总是空的（我并不需要它了），在其他列逐渐加入可读的信息。这只是一个解决方法，但它是我能想到的最好的...

import java.time.Instant; 
import java.time.LocalDateTime; 
import java.time.ZoneId; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.Table; 
import lombok.Getter; 
import lombok.Setter; 
import org.apache.commons.lang3.exception.ExceptionUtils; 
import org.apache.logging.log4j.core.LogEvent; 
import org.apache.logging.log4j.core.appender.db.jpa.BasicLogEventEntity; 
import org.hibernate.annotations.Type; 

/** 
* 
* @author syco 
*/ 
@Entity(name = "applicationLog") 
@Table(name = "`applicationLog`") 
public class ApplicationLog extends BasicLogEventEntity { 

    @Getter 
    @Setter 
    @Column(name = "`customEventDate`") 
    private LocalDateTime customEventDate; 

    @Getter 
    @Setter 
    @Column(name = "`customException`") 
    @Type(type = "text") 
    private String customException; 

    @Getter 
    @Setter 
    @Column(name = "`customLevel`", length = 512) 
    private String customLevel; 

    @Getter 
    @Setter 
    @Column(name = "`customLogger`", length = 512) 
    private String customLogger; 

    @Getter 
    @Setter 
    @Column(name = "`customMessage`") 
    @Type(type = "text") 
    private String customMessage; 

    @Getter 
    @Setter 
    @Column(name = "`customThreadName`", length = 512) 
    private String customThreadName; 

    @Getter 
    @Setter 
    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Column(name = "`id`") 
    private long id; 

    public ApplicationLog() { 
    super(); 
    } 

    public ApplicationLog(LogEvent logEvent) { 
    super(); 
    if (logEvent != null) { 
     setCustomEventDate(Instant.ofEpochMilli(logEvent.getTimeMillis()).atZone(ZoneId.systemDefault()).toLocalDateTime()); 
     if (logEvent.getThrown() != null) { 
     setCustomException(ExceptionUtils.getStackTrace(logEvent.getThrown())); 
     } 
     if (logEvent.getLevel() != null) { 
     setCustomLevel(logEvent.getLevel().name()); 
     } 
     setCustomLogger(logEvent.getLoggerName()); 
     if (logEvent.getMessage() != null) { 
     setCustomMessage(logEvent.getMessage().toString()); 
     } 
     setCustomThreadName(logEvent.getThreadName()); 
    } 
    } 
}