Timestamp converter not working in Spring Data Rest with Spanner

问题

I'm trying to convert the input timestamp which will be in the string format to cloud timestamp with the help of a Spring Data Rest custom converter which is not working. Need an help on the same in understanding why custom converters are not invoked.

Input: http://localhost:8080/apipromocentral/promotions RequestBody : {"startDateTime": "2019-11-07 15:53:00"}

POJO:
@ApiModel
@Data
@AllArgsConstructor
@Table(name = "PROMOTIONS")
public class Promotion {
  /**
   * promotion id
   */
  @ApiModelProperty(notes = "Id of the Promotion", required = true)
  @PrimaryKey
  @Column(name = "PROMO_ID")
  private String promotionId;

  @ApiModelProperty(notes = "Start Date Time of a promotion", allowableValues="yyyy-MM-dd HH:mm:ss", required = true)
  @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss")
  @Column(name = "START_DATE_TIME")
  private Timestamp startDateTime; //java.sql.timestamp;

}

converter code
@Component
public class TimestampWriteConverter implements Converter<java.sql.Timestamp, Timestamp> {

    @Override
    public Timestamp convert(java.sql.Timestamp sqlTimestamp) {
        //Return com.google.cloud.Timestamp;
        return Timestamp.of(sqlTimestamp);
    }
}

exception "message": "FAILED_PRECONDITION: com.google.api.gax.rpc.FailedPreconditionException: io.grpc.StatusRuntimeException: FAILED_PRECONDITION: Invalid value for column START_DATE_TIME in table PROMOTIONS: Expected TIMESTAMP.", "trace": "com.google.cloud.spanner.SpannerException: FAILED_PRECONDITION: com.google.api.gax.rpc.FailedPreconditionException: io.grpc.StatusRuntimeException: FAILED_PRECONDITION: Invalid value for column START_DATE_TIME in table PROMOTIONS: Expected TIMESTAMP.\r\n\tat com.google.cloud.spanner.SpannerExceptionFactory.newSpannerExceptionPreformatted(SpannerExceptionFactory.java:156)\r\n\tat com.google.cloud.spanner.SpannerExceptionFactory.newSpannerException(SpannerExceptionFactory.java:45)\r\n\tat com.google.cloud.spanner.SpannerExceptionFactory.newSpannerException(SpannerExceptionFactory.java:112)\r\n\tat

回答1:

Looking at the documentation, looks like you need pass the TimestampWriteConverter converter to ConverterAwareMappingSpannerEntityProcessor.

@Configuration
public class ConverterConfiguration {

    @Bean
    public SpannerEntityProcessor spannerEntityProcessor(SpannerMappingContext spannerMappingContext) {
        return new ConverterAwareMappingSpannerEntityProcessor(spannerMappingContext,
                Arrays.asList(new TimestampWriteConverter()),
                Arrays.asList());
    }
}

来源：https://stackoverflow.com/questions/59071133/timestamp-converter-not-working-in-spring-data-rest-with-spanner