class <DynamoDBBean>cannot be cast to <DynamoDBBean> class ( <DynamoDBBean> is in unnamed module of loader 'app'; <DynamoDBBean> is in unnamed module of loader org.springframework.boot.devtools.restart.classloader.RestartClassLoader

[peeteko]

Type: Bug

Component:

Describe the bug
When I use Dspring.devtools.restart.enabled=true I have the following ClassCastException when i try to save or load dynamoDBBeans
Only when I disable the devtools restart then it works

I have this problem when I try to the save or load this via dynamoDBTemplate

__dynamoDbTemplate.load(
Key.builder().partitionValue(clientReferenceCode).build(), StatusUpdate.class);

dynamoDbTemplate.save(statusUpdate);__

Exact error message
class be.bpost.isend.epf.partner.service.store.StatusUpdate cannot be cast to class be.bpost.isend.epf.partner.service.store.StatusUpdate (be.bpost.isend.epf.partner.service.store.StatusUpdate is in unnamed module of loader 'app'; be.bpost.isend.epf.partner.service.store.StatusUpdate is in unnamed module of loader org.springframework.boot.devtools.restart.classloader.RestartClassLoader @1e1a4b25)

@DynamoDbBean
public class StatusUpdate {
....

....
}

pom.xml

io.awspring.cloud
spring-cloud-aws-starter-dynamodb



io.awspring.cloud
spring-cloud-aws-dependencies
3.1.0
pom
import

[maciejwalkowiak]

This is known issue in AWS SDK: aws/aws-sdk-java-v2#2604

In our docs we mention that to use devtools, you need to create schema manually: https://docs.awspring.io/spring-cloud-aws/docs/3.1.0/reference/html/index.html#resolving-table-schema

Unfortunately nothing we can do about it.

[peeteko]

I have done the following changes. I have removed all aws sdk dynamoDB annotations @DynamoDBBean, @DynamoDBPartitationKey ,... and added TableSchema

After this I can use -Dspring.devtools.restart.enabled=true

private static final TableSchema STATUS_UPDATE_TABLE_SCHEMA =
StaticTableSchema.builder(StatusUpdate.class)
.newItemSupplier(StatusUpdate::new)
.addAttribute(String.class, a -> a.name("clientReferenceCode")
.getter(StatusUpdate::getClientReferenceCode)
.setter(StatusUpdate::setClientReferenceCode)
.tags(primaryPartitionKey()))
.addAttribute(String.class, a -> a.name("status")
.getter(StatusUpdate::getStatus)
.setter(StatusUpdate::setStatus))
.addAttribute(Long.class, a -> a.name("deletionDate")
.getter(StatusUpdate::getDeletionDate)
.setter(StatusUpdate::setDeletionDate))
.build();

@bean
public TableSchema myStatusTableSchema(){
return STATUS_UPDATE_TABLE_SCHEMA;
}

[maciejwalkowiak]

@peeteko and then it worked?