I've created a custom resource for creating a ThingType which is not yet implemented by AWS as simple CfnObjects. My code looks like this:
String physicalResIdThingType = "ThisISMyThing";
AwsCustomResource.Builder.create(this, "myThingType")
.onCreate(AwsSdkCall.builder()
.service("Iot")
.action("createThingType")
.physicalResourceId(PhysicalResourceId.of(physicalResIdThingType))
.parameters(new HashMap() {{
put("thingTypeName", "myThingType");
}})
.build())
.onDelete(AwsSdkCall.builder()
.service("Iot")
.action("deleteThingType")
.physicalResourceId(PhysicalResourceId.of(physicalResIdThingType))
.parameters(new HashMap() {{
put("thingTypeName", "myThingType");
}}).build()) .policy(AwsCustomResourcePolicy.fromSdkCalls(SdkCallsPolicyOptions.builder()
.resources(AwsCustomResourcePolicy.ANY_RESOURCE)
.build()))
.installLatestAwsSdk(false)
.resourceType(Consts.CUSTOM_RESOURCE_THING_TYPE)
.build();
It is creating well. but not allowing me to delete the thing type because I need first to deprecate it and then delete it.. In the console we need to wait even 5 minutes after deprecation for complete deletion.
My questions are:
Is it possible to override this deprecation ?
If not, Is it possible to do multiple AwsSdkCalls without writing my own lambda functions ?
If none from above, then maybe someone has an idea how can I use this simple solution of AwsCustomResource to delete my thing type?
I can only see one way to do it if you want the thing type to be deleted via cloudformation.
You can configure the timeout-in-minutes when call cloudformation crate-stack . This value should be above than 5 minutes + extra buffer for the other resources to be deleted.
When you receive a DELETE event in your custom resource, you can deprecate the thing type, wait 5min and call delete thing type.
Related
I'm creating a LambdaRestApi as follows
this.gateway = new apigw.LambdaRestApi(this, "Endpoint", {
handler: hello,
endpointExportName: "MainURL"
})
and I'd like to get to the CfnOutput it generates, is it possible? I want to pass it to other functions and I want to avoid creating a new one.
Specifically the situation I'm tackling is this: I have have a post stage that verifies things are working at it uses the CfnOutput:
deployStage.addPost(
new CodeBuildStep("VerifyAPIGatewayEndpoint", {
envFromCfnOutputs: {
ENDPOINT_URL: deploy.hcEndpoint
},
commands: [
"curl -Ssf $ENDPOINT_URL",
"curl -Ssf $ENDPOINT_URL/hello",
"curl -Ssf $ENDPOINT_URL/test"
]
})
)
That deploy.hcEndpoint is a CfnOutput that I'm manually creating after the LambdaRestApi is created:
const gateway = new LambdaRestApi(this, "Endpoint", {handler: hello})
this.hcEndpoint = new CfnOutput(this, "GatewayUrl", {value: gateway.url})
and then making sure that every construct makes it available to its parent.
Using CfnOutputs in the post-deployment step makes sense. I am trying to learn the proper way of doing things, and also have clean stacks. With only one Lambda function it's no big deal, but with tens or hundreds it might. And since LambdaRestApi already creates the output, it does feel like I'm repeating myself by creating an identical one.
Assuming you are using the following code for your LambdaRestApi:
this.gateway = new apigw.LambdaRestApi(this, "Endpoint", {
handler: hello,
endpointExportName: "MainURL"
});
Referencing in same stack as LambdaRestApi
const outputValue = this.gateway.urlForPath("/");
Looking at the source code, the output value is just a call to urlForPath. The method is public, so you can use it directly.
Referencing from another stack
You can use cross stack references to get a reference to the output value of the stack.
import { Fn } from 'aws-cdk-lib';
const outputValue = Fn.importValue("MainURL");
If you try to use the first method in another stack, CDK will just generate a cross stack reference dynamically by adding extra outputs, so it is better to import the value directly.
I'd like to get to the CfnOutput it generates, is it possible?
Yes. Use the escape hatch syntax to get a reference to the CfnOutput that RestApi creates for the endpointExportName:
const urlCfnOutput = this.gateway.node.findChild('Endpoint') as cdk.CfnOutput;
console.log(urlCfnOutput.exportName);
// MainURL
console.log(urlCfnOutput.value);
// https://${Token[TOKEN.258]}.execute-api.us-east-1.${Token[AWS.URLSuffix.3]}/${Token[TOKEN.277]}/
Prefer standard CDK
As their name suggests, "escape hatches" are for "emergencies" when the CDK's standard solutions fail. Your use case may be one such instance, I don't know. But as #Kaustubh Khavnekar points out, you don't need the CfnOutput to get the url token value.
console.log(this.gateway.url)
// https://${Token[TOKEN.258]}.execute-api.us-east-1.${Token[AWS.URLSuffix.3]}/${Token[TOKEN.277]}/
I am trying to use a Lambda function (written in python) to create a series of profile jobs in DataBrew. AWS recently added a new parameter to this function ("Configuration) which I have added in my code. However, when I call the function, I get the following error message: "Unknown parameter in input: "Configuration", must be one of: DatasetName, EncryptionKeyArn, EncryptionMode, Name, LogSubscription, MaxCapacity, MaxRetries, OutputLocation, RoleArn, Tags, Timeout, JobSample." This does not match the parameter list in the boto3 documentation, which was recently updated to align with the new features added to DataBrew on 07/23/21. Has anyone else had this issue? If so, is there a timeline for this bug to be fixed?
It turns out that the version of boto3 that is available in Lambda by default is not the most updated version. Hence, in order to use all the parameters for this method, you have to add the latest version of boto3 (and all dependencies) as a Lambda layer.
As the title says - I've created a Lambda in the Python CDK and I'd like to know how to trigger it on a regular basis (e.g. once per day).
I'm sure it's possible, but I'm new to the CDK and I'm struggling to find my way around the documentation. From what I can tell it will use some sort of event trigger - but I'm not sure how to use it.
Can anyone help?
Sure - it's fairly simple once you get the hang of it.
First, make sure you're importing the right libraries:
from aws_cdk import core, aws_events, aws_events_targets
Then you'll need to make an instance of the schedule class and use the core.Duration (docs for that here) to set the length. Let's say 1 day for example:
lambda_schedule = aws_events.Schedule.rate(core.Duration.days(1))
Then you want to create the event target - this is the actual reference to the Lambda you created in your CDK earlier:
event_lambda_target = aws_events_targets.LambdaFunction(handler=lambda_defined_in_cdk_here)
Lastly you bind it all together in an aws_events.Rule like so:
lambda_cw_event = aws_events.Rule(
self,
"Rule_ID_Here",
description=
"The once per day CloudWatch event trigger for the Lambda",
enabled=True,
schedule=lambda_schedule,
targets=[event_lambda_target])
Hope that helps!
The question is for Python but thought it might be useful to post a Javascript equivalent:
const aws_events = require("aws-cdk-lib/aws-events");
const aws_events_targets = require("aws-cdk-lib/aws-events-targets");
const MyLambdaFunction = <...SDK code for Lambda function here...>
new aws_events.Rule(this, "my-rule-identifier", {
schedule: aws_events.Schedule.rate(aws_cdk_lib.Duration.days(1)),
targets: [new aws_events_targets.LambdaFunction(MyLambdaFunction)],
});
Note: The above is for version 2 of the SDK - might need a few tweaks for v3.
I have written a simple one record delete operation job in production as requested by user, in an AX instance while the other instance was stuck and open. However the record was not deleted.
try
{
ttsbegin;
select fotupdate tableBuffer where tableBuffer.recid == 5457735:
tableBuffer.delete();
ttscommit;
}
catch (exception::error)
{
info("Delete operation cancelled.");
}
tableBuffer's delete()function was overridden with code after super() to store the deleted record in another table.
I have done the same operation earlier successfully but no where with a scenario like one today(executed in one instance while the other instance was stuck).
Please suggest the possible reason as I find the record still persist both in sql server and AX.
Thank you.
If you're trying to prevent this from happening you can use pessimistic locking, where you obtain an update lock.
select pessimisticLock custTable
where custTable.AccountNum > '1000'
See these links for more info:
http://dev.goshoom.net/en/2011/10/pessimistic-locking/
https://blogs.msdn.microsoft.com/emeadaxsupport/2009/07/08/about-locking-and-blocking-in-dynamics-ax-and-how-to-prevent-it/
https://msdn.microsoft.com/en-us/library/bb190073.aspx
After upgrading my .NET server and client projects to 4.0 RC
I get NullReference exceptions because my custom State object is null.
I instantiate the state property in OnOpen event handler, but inside the method body of the first call it is already null.
I have checked in debugger and see that this.GetHashCode() returns different values
in OnOpen event handler and in method, which means it is a different instance.
Is it a known issue? I assume it is very basic behavior and probably I have missed something during upgrade to new version.
Thanks in advance.
I managed to understand the problem. It happens when using PluginAlias.
[XSocketMetadata(PluginAlias =
When attribute is removed and client uses full controller name everything works as expected
and GetHashCode returns same id.
I pushed the replication code to GitHub:
https://github.com/amichel/PlayWithXSockets/tree/ReproduceBugs
When using alias there is a bug (as you have found out).
The workaround is to either use the class name of the controller or only have alias in lower casing.
In your case using
[XSocketMetadata(PluginAlias = "test")]
would work.
Regards
Uffe