with aws-sdk-java-v2 is it possible to set the aws endpoint as a property

[SrinivasKG1]

with aws-sdk-java-v2 is it possible to set the custom aws_endpoint, aws_sts_endpoint, aws_s3_endpoint as a property. Specifically I want to set this property in application.yml file

[debora-ito]

The answer is threefold:

1. The Java SDK supports service-specific endpoint configuration in the format documented in the SDK Reference Guide - note the syntax is a little different (e.g. not aws_s3_endpoint but AWS_ENDPOINT_URL_S3 as environment variable and aws.endpointUrlS3 as Java property)
2. Support for service-specific endpoint configuration was added in Java SDK version 2.28.1 but we have a customer report saying it's not working properly - Service endpoint_url from config file ignored #5779.
3. You mentioned the use of application.yml so I'm assuming you want to use the custom endpoints in a solution that integrates with AWS (like Spring Boot). This will depend on the solution's implementation, our suggestion is to refer to the documentation of the solution you're using.

[SrinivasKG1]

Team, can you advise on the below query..

[SrinivasKG1]

I am not able to override the end point using System.setProperty("aws.endpointUrl","http://127.0.0.1:4566/") or System.setProperty("aws.endpointUrlS3","http://127.0.0.1:4566/").. Also it is not working when I set the environment variables AWS_ENDPOINT_URL=http://127.0.0.1:4566;AWS_ENDPOINT_URL_S3=http://127.0.0.1:4566..

It is only working when we programmatically put as
S3AsyncClient
.builder()
.endpointOverride(URI.create("http://127.0.0.1:4566"))

[debora-ito]

The following works in my local env:

    @Test
    public void listBucketsTest() {
        System.setProperty("aws.endpointUrlS3","http://127.0.0.1:4566/");

        S3Client client = S3Client.builder()
                .region(Region.US_EAST_2)
                .build();

        ListBucketsRequest listBucketsRequest = ListBucketsRequest.builder()
                .build();

        ListBucketsResponse response = client.listBuckets(listBucketsRequest);
        response.buckets().forEach(b-> System.out.println(b.name()));
    }

Debug logs show host=127.0.0.1, port=4566:

2025-02-18 13:52:36,011 [main] DEBUG software.amazon.awssdk.request:85 - Sending Request: DefaultSdkHttpFullRequest(httpMethod=GET, protocol=http, host=127.0.0.1, port=4566, encodedPath=/, headers=[amz-sdk-invocation-id, User-Agent], queryParameters=[])

What version of the SDK are you using, is it 2.28.1 or greater?