AWS SES V1 -> V2 Java SDK migration

In SES V2, the sourceArn and fromArn are replaced by fromEmailAddressIdentityArn. Here's how to migrate the code:

// V1 Code
sesClient.sendRawEmail(SendRawEmailRequest.builder()
    .sourceArn(sourceArn)
    .fromArn(fromArn)
    .build())

// V2 Code
SesV2Client sesv2Client = SesV2Client.builder()
    .region(Region.US_EAST_1)
    .build();

SendEmailRequest emailRequest = SendEmailRequest.builder()
    .fromEmailAddress(sender)  // The actual email address
    .fromEmailAddressIdentityArn(identityArn)  // This replaces both sourceArn and fromArn
    .content(EmailContent.builder()
        .raw(RawMessage.builder()
            .data(SdkBytes.fromByteArray(rawMessage))
            .build())
        .build())
    .destination(Destination.builder()
        .toAddresses(recipient)
        .build())
    .build();

sesv2Client.sendEmail(emailRequest);

Key Changes Explained:

1. The sourceArn and fromArn are consolidated into a single parameter called fromEmailAddressIdentityArn

2. From the AWS SDK documentation:

fromEmailAddressIdentityArn - This parameter is used only for sending authorization. It is the ARN of the identity that is associated with the sending authorization policy that permits you to use the email address specified in the FromEmailAddress parameter.

3. Example usage with authorization:

// If you have an identity "example.com" with ARN:
// arn:aws:ses:us-east-1:123456789012:identity/example.com
// And you want to send from sender@example.com

SendEmailRequest request = SendEmailRequest.builder()
    .fromEmailAddress("sender@example.com")
    .fromEmailAddressIdentityArn("arn:aws:ses:us-east-1:123456789012:identity/example.com")
    // ... other parameters
    .build();

Important Notes:

1. For raw emails, the fromEmailAddressIdentityArn value overrides any X-SES-SOURCE-ARN and X-SES-FROM-ARN headers specified in the raw email message content.

2. The fromEmailAddress must be verified and associated with the identity specified in fromEmailAddressIdentityArn.

Sources:

1. AWS SDK for Java 2.x API Reference - SendEmailRequest.Builder:

This parameter is used only for sending authorization. It is the ARN of the identity 
that is associated with the sending authorization policy that permits you to use 
the email address specified in the FromEmailAddress parameter.

2. From the provided AWS documentation examples showing the proper structure for sending emails using SES V2:

SendEmailRequest emailRequest = SendEmailRequest.builder()
    .destination(destination)
    .content(emailContent)
    .fromEmailAddress(sender)
    .build();

The solution maintains the same functionality as V1 while adapting to V2's simplified authorization model where source and from ARNs are unified under a single identity ARN parameter.