@Override
    public DBInstance deleteDBInstance(DeleteDBInstanceRequest request) {
        request = beforeClientExecution(request);
        return executeDeleteDBInstance(request);
    }
<p>
Deletes a previously provisioned DB instance. When you delete a DB instance, all automated backups for that
instance are deleted and can't be recovered. However, manual DB snapshots of the DB instance aren't deleted.
</p>
<p>
If you request a final DB snapshot, the status of the Amazon RDS DB instance is <code>deleting</code> until the
DB snapshot is created. This operation can't be canceled or reverted after it begins. To monitor the status of
this operation, use <code>DescribeDBInstance</code>.
</p>
<p>
When a DB instance is in a failure state and has a status of <code>failed</code>,
<code>incompatible-restore</code>, or <code>incompatible-network</code>, you can only delete it when you skip
creation of the final snapshot with the <code>SkipFinalSnapshot</code> parameter.
</p>
<p>
If the specified DB instance is part of an Amazon Aurora DB cluster, you can't delete the DB instance if both of
the following conditions are true:
</p>
<ul>
<li>
<p>
The DB cluster is a read replica of another Amazon Aurora DB cluster.
</p>
</li>
<li>
<p>
The DB instance is the only instance in the DB cluster.
</p>
</li>
</ul>
<p>
To delete a DB instance in this case, first use the <code>PromoteReadReplicaDBCluster</code> operation to promote
the DB cluster so that it's no longer a read replica. After the promotion completes, use the
<code>DeleteDBInstance</code> operation to delete the final instance in the DB cluster.
</p>
<important>
<p>
For RDS Custom DB instances, deleting the DB instance permanently deletes the EC2 instance and the associated EBS
volumes. Make sure that you don't terminate or delete these resources before you delete the DB instance.
Otherwise, deleting the DB instance and creation of the final snapshot might fail.
</p>
</important>

@param deleteDBInstanceRequest
@return Result of the DeleteDBInstance operation returned by the service.
@throws DBInstanceNotFoundException
        <code>DBInstanceIdentifier</code> doesn't refer to an existing DB instance.
@throws InvalidDBInstanceStateException
        The DB instance isn't in a valid state.
@throws DBSnapshotAlreadyExistsException
        <code>DBSnapshotIdentifier</code> is already used by an existing snapshot.
@throws SnapshotQuotaExceededException
        The request would result in the user exceeding the allowed number of DB snapshots.
@throws InvalidDBClusterStateException
        The requested operation can't be performed while the cluster is in this state.
@throws DBInstanceAutomatedBackupQuotaExceededException
        The quota for retained automated backups was exceeded. This prevents you from retaining any additional
        automated backups. The retained automated backups quota is the same as your DB instance quota.
@sample AmazonRDS.DeleteDBInstance
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/DeleteDBInstance" target="_top">AWS API
     Documentation</a>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/AmazonRDSClient.java