protected ProgressEvent handleRequest()

in aws-rds-dbinstance/src/main/java/software/amazon/rds/dbinstance/DeleteHandler.java [30:65]
33 lines of code
2 McCabe index (conditional complexity)

    protected ProgressEvent<ResourceModel, CallbackContext> handleRequest(
            final AmazonWebServicesClientProxy proxy,
            final ResourceHandlerRequest<ResourceModel> request,
            final CallbackContext callbackContext,
            final ProxyClient<RdsClient> rdsProxyClient,
            final ProxyClient<Ec2Client> ec2ProxyClient,
            final Logger logger
    ) {
        String snapshotIdentifier = null;
        // https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html
        // For AWS::RDS::DBInstance resources that don't specify the DBClusterIdentifier property, the default policy is Snapshot.
        if (BooleanUtils.isNotFalse(request.getSnapshotRequested())) {
            snapshotIdentifier = generateResourceIdentifier(
                    Optional.ofNullable(request.getStackId()).orElse(STACK_NAME),
                    SNAPSHOT_PREFIX + Optional.ofNullable(request.getLogicalResourceIdentifier()).orElse(RESOURCE_IDENTIFIER),
                    request.getClientRequestToken(),
                    SNAPSHOT_MAX_LENGTH
            );
        }
        final String finalSnapshotIdentifier = snapshotIdentifier;

        return proxy.initiate("rds::delete-db-instance", rdsProxyClient, request.getDesiredResourceState(), callbackContext)
                .translateToServiceRequest(model -> Translator.deleteDbInstanceRequest(model, finalSnapshotIdentifier))
                .backoffDelay(config.getBackoff())
                .makeServiceCall((deleteRequest, proxyInvocation) -> proxyInvocation.injectCredentialsAndInvokeV2(
                        deleteRequest,
                        proxyInvocation.client()::deleteDBInstance
                ))
                .stabilize((deleteRequest, deleteResponse, proxyInvocation, model, context) -> isDbInstanceDeleted(proxyInvocation, model))
                .handleError((deleteRequest, exception, client, model, context) -> Commons.handleException(
                        ProgressEvent.progress(model, context),
                        exception,
                        DELETE_DB_INSTANCE_ERROR_RULE_SET
                ))
                .done((deleteRequest, deleteResponse, proxyInvocation, model, context) -> ProgressEvent.defaultSuccessHandler(null));
    }