public String getClusterIdentifier() {
        return this.clusterIdentifier;
    }
<p>
The unique identifier of the cluster that you want to rotate the encryption keys for.
</p>
<p>
Constraints: Must be the name of valid cluster that has encryption enabled.
</p>

@return The unique identifier of the cluster that you want to rotate the encryption keys for.</p>
        <p>
        Constraints: Must be the name of valid cluster that has encryption enabled.
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/RotateEncryptionKeyRequest.java