Using the WritableResource abstraction for both writing to S3 and the file system

[jbotuck]

Any thoughts on this question? https://stackoverflow.com/q/76069098/3641569

Spring Aws makes it possible to use Spring's resource abstraction to upload a file to s3. As shown here: https://docs.awspring.io/spring-cloud-aws/docs/2.4.1/reference/html/index.html#uploading-files

public void writeResource() throws IOException {
        Resource resource = this.resourceLoader.getResource("s3://myBucket/rootFile.log");
        WritableResource writableResource = (WritableResource) resource;
        try (OutputStream outputStream = writableResource.getOutputStream()) {
         outputStream.write("test".getBytes());
      }
   }

I would like to be able to externalize the location string so that in production a file is created in s3 but in my tests it creates a local file in the current working directory.

My problem is that I can't get Spring to create and write to a local file! I tried switching out the location string to file::myFile but I get java.nio.file.NoSuchFileException

How can I get code just like the one in the writeResource method above to work with the local file system?