com.amazonaws.services.dynamodbv2.datamodeling

Annotation Type DynamoDBVersioned

@Retention(value=RUNTIME)
 @Target(value={FIELD,METHOD,ANNOTATION_TYPE})
public @interface DynamoDBVersioned

Annotation for marking a property as an optimistic locking version attribute.

 @DynamoDBVersioned
 public Long getRecordVersionNumber()
 

Alternately, the convinience annotation DynamoDBVersionAttribute may be used if combining with an attribute name on a field/getter.

Only nullable, integral numeric types (e.g. Integer, Long) can be used as version properties. On a save() operation, the DynamoDBMapper will attempt to increment the version property and assert that the service's value matches the client's.

New objects will be assigned a version of 1 when saved.

Note that for batchWrite, and by extension batchSave and batchDelete, no version checks are performed, as required by the AmazonDynamoDB.batchWriteItem(BatchWriteItemRequest) API.

Note that for transactionWrite, no version checks are performed. An SdkClientException exception is thrown, if class of any input object is annotated with DynamoDBVersioned.

May be used as a meta-annotation.

See Also:

DynamoDBVersionAttribute