@Override
    public StartExportTaskResult startExportTask(StartExportTaskRequest request) {
        request = beforeClientExecution(request);
        return executeStartExportTask(request);
    }
<p>
Starts an export of DB snapshot or DB cluster data to Amazon S3. The provided IAM role must have access to the S3
bucket.
</p>
<p>
You can't export snapshot data from Db2 or RDS Custom DB instances.
</p>
<p>
For more information on exporting DB snapshot data, see <a
href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ExportSnapshot.html">Exporting DB snapshot data
to Amazon S3</a> in the <i>Amazon RDS User Guide</i> or <a
href="https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/aurora-export-snapshot.html">Exporting DB
cluster snapshot data to Amazon S3</a> in the <i>Amazon Aurora User Guide</i>.
</p>
<p>
For more information on exporting DB cluster data, see <a
href="https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/export-cluster-data.html">Exporting DB cluster
data to Amazon S3</a> in the <i>Amazon Aurora User Guide</i>.
</p>

@param startExportTaskRequest
@return Result of the StartExportTask operation returned by the service.
@throws DBSnapshotNotFoundException
        <code>DBSnapshotIdentifier</code> doesn't refer to an existing DB snapshot.
@throws DBClusterSnapshotNotFoundException
        <code>DBClusterSnapshotIdentifier</code> doesn't refer to an existing DB cluster snapshot.
@throws DBClusterNotFoundException
        <code>DBClusterIdentifier</code> doesn't refer to an existing DB cluster.
@throws ExportTaskAlreadyExistsException
        You can't start an export task that's already running.
@throws InvalidS3BucketException
        The specified Amazon S3 bucket name can't be found or Amazon RDS isn't authorized to access the specified
        Amazon S3 bucket. Verify the <b>SourceS3BucketName</b> and <b>S3IngestionRoleArn</b> values and try
        again.
@throws IamRoleNotFoundException
        The IAM role is missing for exporting to an Amazon S3 bucket.
@throws IamRoleMissingPermissionsException
        The IAM role requires additional permissions to export to an Amazon S3 bucket.
@throws InvalidExportOnlyException
        The export is invalid for exporting to an Amazon S3 bucket.
@throws KMSKeyNotAccessibleException
        An error occurred accessing an Amazon Web Services KMS key.
@throws InvalidExportSourceStateException
        The state of the export snapshot is invalid for exporting to an Amazon S3 bucket.
@sample AmazonRDS.StartExportTask
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/StartExportTask" target="_top">AWS API
     Documentation</a>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/AmazonRDSClient.java