How to get lastEvaluatedKey ?

[ipsi-apant]

Type: Question

Component:

DynamoDB

Describe
I am using io.awspring.cloud.dynamodb.DynamoDbTemplate for querying records by global secondary index.
The result of this API is PageIterable<T> which works if I need to return these records. However, the table contain millions of records, therefore planning query in chunks with filter criteria and use lastEvaluatedKey to fetch next set of records.
I am unable to find any workable example using DynamoDbTemplate.

Can you please advise?

Tech stack

• Springboot 3.2.5
• awspring 3.1.1
• AWS SDK 2.25.47
• Java 21
• WebFlux functional routes

Sample

private Flux<Person> getAllByIndex(String globalSecondaryIndex, final Consumer<Builder> expressionConsumer,)  {

    Expression.Builder expressionBuilder = Expression.builder();
    expressionConsumer.accept(expressionBuilder);

    return Flux.fromIterable(dynamoDbTemplate
                                 .query(
                                     QueryEnhancedRequest.builder()
                                                         .queryConditional(
                                                             QueryConditional
                                                                 .keyEqualTo(keyBuilder -> keyBuilder
                                                                     .partitionValue(globalSecondaryIndex)
                                                                 )
                                                         )
                                                         .filterExpression(expressionBuilder.build())
                                                         .build(),
                                     Person.class,
                                     PERSON_INDEX
                                 )
                                 .items()
    );
}

[MatejNedic]

Hey @ipsi-apant , Instead of using .items() you have to use for example .iterator().next().lastEvaluatedKey() on that level you have .items() as well

[maciejwalkowiak]

Closing due to lack of feedback