protected ProgressEvent handleRequest()

in aws-ssmincidents-responseplan/src/main/java/software/amazon/ssmincidents/responseplan/DeleteHandler.java [17:70]
43 lines of code
3 McCabe index (conditional complexity)

    protected ProgressEvent<ResourceModel, CallbackContext> handleRequest(
        final AmazonWebServicesClientProxy proxy,
        final ResourceHandlerRequest<ResourceModel> request,
        final CallbackContext callbackContext,
        final ProxyClient<SsmIncidentsClient> proxyClient,
        final Logger logger) {

        this.logger = logger;

        return ProgressEvent.progress(request.getDesiredResourceState(), callbackContext)
            // STEP 1 [check if resource already exists]
            // for more information -> https://docs.aws.amazon.com/cloudformation-cli/latest/userguide/resource-type-test-contract.html
            // if target API does not support 'ResourceNotFoundException' then following check is required
            .then(progress ->
                      // STEP 1.0 [initialize a proxy context]
                      // If your service API does not return ResourceNotFoundException on delete requests against some identifier (e.g; resource Name)
                      // and instead returns a 200 even though a resource already deleted, you must first check if the resource exists here
                      // NOTE: If your service API throws 'ResourceNotFoundException' for delete requests this method is not necessary
                      proxy.initiate("AWS-SSMIncidents-ResponsePlan::Delete::PreDeletionCheck", proxyClient, progress.getResourceModel(), progress.getCallbackContext())
                          // STEP 1.1 [initialize a proxy context]
                          .translateToServiceRequest(Translator::translateToReadRequest)
                          .makeServiceCall((awsRequest, client) -> {
                              AwsResponse awsResponse = null;
                              awsResponse = client.injectCredentialsAndInvokeV2(awsRequest, proxyClient.client()::getResponsePlan);
                              logger.log(String.format("%s has successfully been read.", ResourceModel.TYPE_NAME));
                              return awsResponse;
                          })
                          .handleError((awsRequest, exception, client, model, context) -> {
                              if (exception instanceof ResourceNotFoundException)
                                  return ProgressEvent.failed(model, context, HandlerErrorCode.NotFound, "Not Found");
                              throw Translator.handleException(exception);
                          })
                          .progress()
            )
            .then(progress ->
                      proxy.initiate("AWS-SSMIncidents-ResponsePlan::Delete", proxyClient, progress.getResourceModel(),
                              progress.getCallbackContext())
                          .translateToServiceRequest(Translator::translateToDeleteRequest)
                          .makeServiceCall((awsRequest, client) -> {
                              AwsResponse awsResponse = null;
                              try {
                                  awsResponse = client
                                      .injectCredentialsAndInvokeV2(awsRequest, proxyClient.client()::deleteResponsePlan);
                              } catch (final Exception e) {
                                  throw Translator.handleException(e);
                              }

                              logger.log(String.format("%s successfully deleted.", ResourceModel.TYPE_NAME));
                              return awsResponse;
                          })
                          .progress()
            )
            .then(progress -> ProgressEvent.defaultSuccessHandler(null));
    }