CDK Constructs for AWS SNS
Project description
Amazon Simple Notification Service Construct Library
This is a developer preview (public beta) module. Releases might lack important features and might have future breaking changes.
This API is still under active development and subject to non-backward compatible changes or removal in any future version. Use of the API is not recommended in production environments. Experimental APIs are not subject to the Semantic Versioning model.
Add an SNS Topic to your stack:
import sns = require('@aws-cdk/aws-sns');
const topic = new sns.Topic(this, 'Topic', {
displayName: 'Customer subscription topic'
});
Subscriptions
Various subscriptions can be added to the topic by calling the
.addSubscription(...)
method on the topic. It accepts a subscription object,
default implementations of which can be found in the
@aws-cdk/aws-sns-subscriptions
package:
Add an HTTPS Subscription to your topic:
import subs = require('@aws-cdk/aws-sns-subscriptions');
const myTopic = new sns.Topic(this, 'MyTopic');
myTopic.addSubscription(new subs.UrlSubscription('https://foobar.com/'));
Subscribe a queue to the topic:
myTopic.addSubscription(new subs.SqsSubscription(queue));
Note that subscriptions of queues in different accounts need to be manually confirmed by reading the initial message from the queue and visiting the link found in it.
Filter policy
A filter policy can be specified when subscribing an endpoint to a topic.
Example with a Lambda subscription:
const myTopic = new sns.Topic(this, 'MyTopic');
const fn = new lambda.Function(this, 'Function', ...);
// Lambda should receive only message matching the following conditions on attributes:
// color: 'red' or 'orange' or begins with 'bl'
// size: anything but 'small' or 'medium'
// price: between 100 and 200 or greater than 300
topic.subscribeLambda(new subs.LambdaSubscription(fn, {
filterPolicy: {
color: sns.SubscriptionFilter.stringFilter({
whitelist: ['red', 'orange'],
matchPrefixes: ['bl']
}),
size: sns.SubscriptionFilter.stringFilter({
blacklist: ['small', 'medium'],
}),
price: sns.SubscriptionFilter.numericFilter({
between: { start: 100, stop: 200 },
greaterThan: 300
})
}
}));
CloudWatch Event Rule Target
SNS topics can be used as targets for CloudWatch event rules.
Use the @aws-cdk/aws-events-targets.SnsTopicTarget
:
import targets = require('@aws-cdk/aws-events-targets');
codeCommitRepository.onCommit(new targets.SnsTopicTarget(myTopic));
This will result in adding a target to the event rule and will also modify the topic resource policy to allow CloudWatch events to publish to the topic.
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