DynamoDBMappingException: class java.util.ArrayList not annotated with @DynamoDBTable

Question

Although, @DynamoDBTable annotation is there still getting exception when ever I am doing batchsave and also why IntelliJ inspection telling DynamoDBMapperConfig is deprecated.

object  TestDDbOperation{
  final val EMPLOYEE_TABLE_NAME = "TestAnytimepayEmployeeJobData"
  final val EMPLOYEE_ID_HASH_ATTRIBUTE = "employeeId"
  final val EMPLOYEE_JOB_DATA_LIST_ATTRIBUTE = "employeeJobDataList"
  final val LAST_UPDATE_TIME_ATTRIBUTE = "lastUpdatedTime"
}

@DynamoDBTable(tableName = TestDDbOperation.EMPLOYEE_TABLE_NAME)
class TestDDbOperation {
  import TestDDbOperation._

  @BeanProperty
  @DynamoDBHashKey(attributeName = EMPLOYEE_ID_HASH_ATTRIBUTE)
  var employeeId: String = _

  @BeanProperty
  @DynamoDBAttribute(attributeName = LAST_UPDATE_TIME_ATTRIBUTE)
  var lastUpdatedTime: Long = _
}

DDbOperation:

    def batchSaveInDDB[T](employeeJobDataList: ArrayList[T]): List[FailedBatch] =
     AWSSession.dynamoDBMapper.batchSave(employeeJobDataList, new 
     DynamoDBMapperConfig(DynamoDBMapperConfig.SaveBehavior.UPDATE))

user1830702 · Accepted Answer · 2022-08-05 20:08:46Z

0

I had the same issue with batchDelete. I could solved it calling to the batchWrite method like this:

dynamoDBMapper.batchWrite(Collections.emptyList(), objectsToDelete, config)

For batch save will be:

dynamoDBMapper.batchWrite(objectsToSave, Collections.emptyList(), config)

answered Aug 5, 2022 at 20:08

user1830702

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Paweł Sosnowski · Accepted Answer · 2024-09-05 11:22:58Z

0

This happens because you are passing List type to batchSave method which takes varargs:
public List<DynamoDBMapper.FailedBatch> batchSave(Object... objectsToSave)

To make it work you need to convert list to an array and add spread operator (:_*), which I believe in Scala would be:

AWSSession.dynamoDBMapper.batchSave(employeeJobDataList.toList:_*), new DynamoDBMapperConfig(DynamoDBMapperConfig.SaveBehavior.UPDATE))

unfortunately, batch save has no method with config parameter, so if you want to use it you have to call batchWrite directly with an empty list:
dynamoDBMapper.batchWrite(employeeJobDataList, Collections.emptyList(), config)

For more info take a look here:
How to pass Scala array into Scala vararg method?

edited Sep 5, 2024 at 11:22

answered Sep 5, 2024 at 10:10

Paweł Sosnowski

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