public String getPreSignedUrl() {
        return this.preSignedUrl;
    }
<p>
When you are creating a read replica from one Amazon Web Services GovCloud (US) Region to another or from one
China Amazon Web Services Region to another, the URL that contains a Signature Version 4 signed request for the
<code>CreateDBInstanceReadReplica</code> API operation in the source Amazon Web Services Region that contains the
source DB instance.
</p>
<p>
This setting applies only to Amazon Web Services GovCloud (US) Regions and China Amazon Web Services Regions.
It's ignored in other Amazon Web Services Regions.
</p>
<p>
This setting applies only when replicating from a source DB <i>instance</i>. Source DB clusters aren't supported
in Amazon Web Services GovCloud (US) Regions and China Amazon Web Services Regions.
</p>
<p>
You must specify this parameter when you create an encrypted read replica from another Amazon Web Services Region
by using the Amazon RDS API. Don't specify <code>PreSignedUrl</code> when you are creating an encrypted read
replica in the same Amazon Web Services Region.
</p>
<p>
The presigned URL must be a valid request for the <code>CreateDBInstanceReadReplica</code> API operation that can
run in the source Amazon Web Services Region that contains the encrypted source DB instance. The presigned URL
request must contain the following parameter values:
</p>
<ul>
<li>
<p>
<code>DestinationRegion</code> - The Amazon Web Services Region that the encrypted read replica is created in.
This Amazon Web Services Region is the same one where the <code>CreateDBInstanceReadReplica</code> operation is
called that contains this presigned URL.
</p>
<p>
For example, if you create an encrypted DB instance in the us-west-1 Amazon Web Services Region, from a source DB
instance in the us-east-2 Amazon Web Services Region, then you call the <code>CreateDBInstanceReadReplica</code>
operation in the us-east-1 Amazon Web Services Region and provide a presigned URL that contains a call to the
<code>CreateDBInstanceReadReplica</code> operation in the us-west-2 Amazon Web Services Region. For this example,
the <code>DestinationRegion</code> in the presigned URL must be set to the us-east-1 Amazon Web Services Region.
</p>
</li>
<li>
<p>
<code>KmsKeyId</code> - The KMS key identifier for the key to use to encrypt the read replica in the destination
Amazon Web Services Region. This is the same identifier for both the <code>CreateDBInstanceReadReplica</code>
operation that is called in the destination Amazon Web Services Region, and the operation contained in the
presigned URL.
</p>
</li>
<li>
<p>
<code>SourceDBInstanceIdentifier</code> - The DB instance identifier for the encrypted DB instance to be
replicated. This identifier must be in the Amazon Resource Name (ARN) format for the source Amazon Web Services
Region. For example, if you are creating an encrypted read replica from a DB instance in the us-west-2 Amazon Web
Services Region, then your <code>SourceDBInstanceIdentifier</code> looks like the following example:
<code>arn:aws:rds:us-west-2:123456789012:instance:mysql-instance1-20161115</code>.
</p>
</li>
</ul>
<p>
To learn how to generate a Signature Version 4 signed request, see <a
href="https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html">Authenticating Requests:
Using Query Parameters (Amazon Web Services Signature Version 4)</a> and <a
href="https://docs.aws.amazon.com/general/latest/gr/signature-version-4.html">Signature Version 4 Signing
Process</a>.
</p>
<note>
<p>
If you are using an Amazon Web Services SDK tool or the CLI, you can specify <code>SourceRegion</code> (or
<code>--source-region</code> for the CLI) instead of specifying <code>PreSignedUrl</code> manually. Specifying
<code>SourceRegion</code> autogenerates a presigned URL that is a valid request for the operation that can run in
the source Amazon Web Services Region.
</p>
<p>
<code>SourceRegion</code> isn't supported for SQL Server, because Amazon RDS for SQL Server doesn't support
cross-Region read replicas.
</p>
</note>
<p>
This setting doesn't apply to RDS Custom DB instances.
</p>

@return When you are creating a read replica from one Amazon Web Services GovCloud (US) Region to another or from
        one China Amazon Web Services Region to another, the URL that contains a Signature Version 4 signed
        request for the <code>CreateDBInstanceReadReplica</code> API operation in the source Amazon Web Services
        Region that contains the source DB instance.</p>
        <p>
        This setting applies only to Amazon Web Services GovCloud (US) Regions and China Amazon Web Services
        Regions. It's ignored in other Amazon Web Services Regions.
        </p>
        <p>
        This setting applies only when replicating from a source DB <i>instance</i>. Source DB clusters aren't
        supported in Amazon Web Services GovCloud (US) Regions and China Amazon Web Services Regions.
        </p>
        <p>
        You must specify this parameter when you create an encrypted read replica from another Amazon Web
        Services Region by using the Amazon RDS API. Don't specify <code>PreSignedUrl</code> when you are
        creating an encrypted read replica in the same Amazon Web Services Region.
        </p>
        <p>
        The presigned URL must be a valid request for the <code>CreateDBInstanceReadReplica</code> API operation
        that can run in the source Amazon Web Services Region that contains the encrypted source DB instance. The
        presigned URL request must contain the following parameter values:
        </p>
        <ul>
        <li>
        <p>
        <code>DestinationRegion</code> - The Amazon Web Services Region that the encrypted read replica is
        created in. This Amazon Web Services Region is the same one where the
        <code>CreateDBInstanceReadReplica</code> operation is called that contains this presigned URL.
        </p>
        <p>
        For example, if you create an encrypted DB instance in the us-west-1 Amazon Web Services Region, from a
        source DB instance in the us-east-2 Amazon Web Services Region, then you call the
        <code>CreateDBInstanceReadReplica</code> operation in the us-east-1 Amazon Web Services Region and
        provide a presigned URL that contains a call to the <code>CreateDBInstanceReadReplica</code> operation in
        the us-west-2 Amazon Web Services Region. For this example, the <code>DestinationRegion</code> in the
        presigned URL must be set to the us-east-1 Amazon Web Services Region.
        </p>
        </li>
        <li>
        <p>
        <code>KmsKeyId</code> - The KMS key identifier for the key to use to encrypt the read replica in the
        destination Amazon Web Services Region. This is the same identifier for both the
        <code>CreateDBInstanceReadReplica</code> operation that is called in the destination Amazon Web Services
        Region, and the operation contained in the presigned URL.
        </p>
        </li>
        <li>
        <p>
        <code>SourceDBInstanceIdentifier</code> - The DB instance identifier for the encrypted DB instance to be
        replicated. This identifier must be in the Amazon Resource Name (ARN) format for the source Amazon Web
        Services Region. For example, if you are creating an encrypted read replica from a DB instance in the
        us-west-2 Amazon Web Services Region, then your <code>SourceDBInstanceIdentifier</code> looks like the
        following example: <code>arn:aws:rds:us-west-2:123456789012:instance:mysql-instance1-20161115</code>.
        </p>
        </li>
        </ul>
        <p>
        To learn how to generate a Signature Version 4 signed request, see <a
        href="https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html">Authenticating
        Requests: Using Query Parameters (Amazon Web Services Signature Version 4)</a> and <a
        href="https://docs.aws.amazon.com/general/latest/gr/signature-version-4.html">Signature Version 4 Signing
        Process</a>.
        </p>
        <note>
        <p>
        If you are using an Amazon Web Services SDK tool or the CLI, you can specify <code>SourceRegion</code>
        (or <code>--source-region</code> for the CLI) instead of specifying <code>PreSignedUrl</code> manually.
        Specifying <code>SourceRegion</code> autogenerates a presigned URL that is a valid request for the
        operation that can run in the source Amazon Web Services Region.
        </p>
        <p>
        <code>SourceRegion</code> isn't supported for SQL Server, because Amazon RDS for SQL Server doesn't
        support cross-Region read replicas.
        </p>
        </note>
        <p>
        This setting doesn't apply to RDS Custom DB instances.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/CreateDBInstanceReadReplicaRequest.java