in python/rpdk/java/templates/init/guided_aws/StubCreateHandler.java [20:116]
protected ProgressEvent<ResourceModel, CallbackContext> handleRequest(
final AmazonWebServicesClientProxy proxy,
final ResourceHandlerRequest<ResourceModel> request,
final CallbackContext callbackContext,
final ProxyClient<SdkClient> proxyClient,
final Logger logger) {
this.logger = logger;
// TODO: Adjust Progress Chain according to your implementation
// https://github.com/aws-cloudformation/cloudformation-cli-java-plugin/blob/master/src/main/java/software/amazon/cloudformation/proxy/CallChain.java
return ProgressEvent.progress(request.getDesiredResourceState(), callbackContext)
// STEP 1 [check if resource already exists]
// if target API does not support 'ResourceAlreadyExistsException' then following check is required
// for more information -> https://docs.aws.amazon.com/cloudformation-cli/latest/userguide/resource-type-test-contract.html
.then(progress ->
// STEP 1.0 [initialize a proxy context]
// If your service API is not idempotent, meaning it does not distinguish duplicate create requests against some identifier (e.g; resource Name)
// and instead returns a 200 even though a resource already exists, you must first check if the resource exists here
// NOTE: If your service API throws 'ResourceAlreadyExistsException' for create requests this method is not necessary
proxy.initiate("{{ call_graph }}::{{ operation }}::PreExistanceCheck", proxyClient, progress.getResourceModel(), progress.getCallbackContext())
// STEP 1.1 [TODO: construct a body of a request]
.translateToServiceRequest(Translator::translateToReadRequest)
// STEP 1.2 [TODO: make an api call]
.makeServiceCall((awsRequest, client) -> {
AwsResponse awsResponse = null;
// TODO: add custom read resource logic
logger.log(String.format("%s has successfully been read.", ResourceModel.TYPE_NAME));
return awsResponse;
})
// STEP 1.3 [TODO: handle exception]
.handleError((awsRequest, exception, client, model, context) -> {
// TODO: uncomment when ready to implement
// if (exception instanceof CfnNotFoundException)
// return ProgressEvent.progress(model, context);
// throw exception;
return ProgressEvent.progress(model, context);
})
.progress()
)
// STEP 2 [create/stabilize progress chain - required for resource creation]
.then(progress ->
// If your service API throws 'ResourceAlreadyExistsException' for create requests then CreateHandler can return just proxy.initiate construction
// STEP 2.0 [initialize a proxy context]
// Implement client invocation of the create request through the proxyClient, which is already initialised with
// caller credentials, correct region and retry settings
proxy.initiate("{{ call_graph }}::{{ operation }}", proxyClient,progress.getResourceModel(), progress.getCallbackContext())
// STEP 2.1 [TODO: construct a body of a request]
.translateToServiceRequest(Translator::translateToCreateRequest)
// STEP 2.2 [TODO: make an api call]
.makeServiceCall((awsRequest, client) -> {
AwsResponse awsResponse = null;
try {
// TODO: put your create resource code here
} catch (final AwsServiceException e) {
/*
* While the handler contract states that the handler must always return a progress event,
* you may throw any instance of BaseHandlerException, as the wrapper map it to a progress event.
* Each BaseHandlerException maps to a specific error code, and you should map service exceptions as closely as possible
* to more specific error codes
*/
throw new CfnGeneralServiceException(ResourceModel.TYPE_NAME, e);
}
logger.log(String.format("%s successfully created.", ResourceModel.TYPE_NAME));
return awsResponse;
})
// STEP 2.3 [TODO: stabilize step is not necessarily required but typically involves describing the resource until it is in a certain status, though it can take many forms]
// for more information -> https://docs.aws.amazon.com/cloudformation-cli/latest/userguide/resource-type-test-contract.html
// If your resource requires some form of stabilization (e.g. service does not provide strong consistency), you will need to ensure that your code
// accounts for any potential issues, so that a subsequent read/update requests will not cause any conflicts (e.g. NotFoundException/InvalidRequestException)
.stabilize((awsRequest, awsResponse, client, model, context) -> {
// TODO: put your stabilization code here
final boolean stabilized = true;
logger.log(String.format("%s [%s] has been stabilized.", ResourceModel.TYPE_NAME, model.getPrimaryIdentifier()));
return stabilized;
})
.progress()
)
// STEP 3 [TODO: describe call/chain to return the resource model]
.then(progress -> new ReadHandler().handleRequest(proxy, request, callbackContext, proxyClient, logger));
}