Spring Cloud Function and SQSEvent Triggered AWS Lambda Function - spring-cloud

Question

I'm unable to get a Spring-Cloud based AWS Lambda Function with an SQS Message trigger to work. I'm using the Spring Cloud Function AWS adapter version 2.0.1.RELEASE and attempting to deploy to the AWS EU-WEST-2 Region.
My SpringBootRequestHandler is defined as follows:
import org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler;
import com.amazonaws.services.lambda.runtime.events.SQSEvent;
public class ReplicationHandler extends SpringBootRequestHandler<SQSEvent, String>{
}
My #Bean function looks as follows:
#Bean
public Function<SQSEvent, String> handleEvent() {
return value -> processEvent((SQSEvent)value);
}
I feed this with the following test event:
{
"Records": [
{
"messageId": "02a4e04b-a1d2-417a-b073-56123be35ac6",
"receiptHandle": "AQEB0fsSc76vU9Y6vQEz",
"body": "hello world",
"attributes": {
"ApproximateReceiveCount": "1",
"SentTimestamp": "1553860061037",
"SenderId": "AIDAIVEA3AGEU7NF6DRAG",
"ApproximateFirstReceiveTimestamp": "1553860061042"
},
"messageAttributes": {},
"md5OfBody": "a4d19d8b1019e01bb875eea6232bf2f1",
"eventSource": "aws:sqs",
"eventSourceARN": "arn:aws:sqs:eu-west-2:XXXXX:YYYYY",
"awsRegion": "eu-west-2"
}
]
}
When I run this , I get the following error:
{
"errorMessage": "reactor.core.publisher.FluxJust cannot be cast to com.amazonaws.services.lambda.runtime.events.SQSEvent",
"errorType": "java.lang.ClassCastException",
"stackTrace": [
"org.springframework.cloud.function.adapter.aws.SpringFunctionInitializer.apply(SpringFunctionInitializer.java:132)",
"org.springframework.cloud.function.adapter.aws.SpringBootRequestHandler.handleRequest(SpringBootRequestHandler.java:48)"
]
}
Anyone have any suggestions around what's going wrong here? Alternatively, if there are any working samples on the web for my exact scenario, that would be good as well.