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Quarkus demo: Amazon SNS Client

This example showcases how to use the AWS SNS client with Quarkus.

Run the Demo in Dev Mode

  • Run ./mvnw clean quarkus:dev

Publish messages to the topic

Shoot with a couple of quarks using sync endpoint

curl -XPOST -H'Content-type: application/json' http://localhost:8080/sync/cannon/shoot -d'{"flavor": "Charm", "spin": "1/2"}'
curl -XPOST -H'Content-type: application/json' http://localhost:8080/sync/cannon/shoot -d'{"flavor": "Strange", "spin": "1/2"}'

And using async endpoint

curl -XPOST -H'Content-type: application/json' http://localhost:8080/async/cannon/shoot -d'{"flavor": "Upper", "spin": "1/2"}'
curl -XPOST -H'Content-type: application/json' http://localhost:8080/async/cannon/shoot -d'{"flavor": "Down", "spin": "1/2"}'

And observe logs that both endpoints (sync & async) receives published messages

2020-05-13 11:34:02,366 INFO  [org.acm.sns.QuarksShieldSyncResource] (executor-thread-31) Quark[Charm, 1/2] collision with the shield.
2020-05-13 11:34:02,378 INFO  [org.acm.sns.QuarksShieldAsyncResource] (executor-thread-31) Quark[Charm, 1/2] collision with the shield.
2020-05-13 11:34:02,383 INFO  [org.acm.sns.QuarksCannonSyncResource] (executor-thread-32) Fired Quark[Charm, 1/2}]
2020-05-13 11:34:18,852 INFO  [org.acm.sns.QuarksShieldSyncResource] (executor-thread-31) Quark[Strange, 1/2] collision with the shield.
2020-05-13 11:34:18,864 INFO  [org.acm.sns.QuarksShieldAsyncResource] (executor-thread-31) Quark[Strange, 1/2] collision with the shield.
2020-05-13 11:34:18,870 INFO  [org.acm.sns.QuarksCannonSyncResource] (executor-thread-32) Fired Quark[Strange, 1/2}]
2020-05-13 11:34:26,973 INFO  [org.acm.sns.QuarksShieldSyncResource] (executor-thread-32) Quark[Upper, 1/2] collision with the shield.
2020-05-13 11:34:26,984 INFO  [org.acm.sns.QuarksShieldAsyncResource] (executor-thread-32) Quark[Upper, 1/2] collision with the shield.
2020-05-13 11:34:26,992 INFO  [org.acm.sns.QuarksCannonAsyncResource] (sdk-async-response-11-0) Fired Quark[Upper, 1/2}]
2020-05-13 11:34:36,025 INFO  [org.acm.sns.QuarksShieldSyncResource] (executor-thread-32) Quark[Down, 1/2] collision with the shield.
2020-05-13 11:34:36,033 INFO  [org.acm.sns.QuarksShieldAsyncResource] (executor-thread-32) Quark[Down, 1/2] collision with the shield.
2020-05-13 11:34:36,038 INFO  [org.acm.sns.QuarksCannonAsyncResource] (sdk-async-response-11-1) Fired Quark[Down, 1/2}]

Unsubscribe endpoint from the topic

Unsubscribe sync endpoint

curl -XPOST -H'Content-type: application/json' http://localhost:8080/sync/shield/unsubscribe

Unsubscribe async endpoint

curl -XPOST -H'Content-type: application/json' http://localhost:8080/async/shield/unsubscribe

And observe the logs to see that endpoint is unsubscribed and will stop receiving new messages from the topic.

2020-05-13 11:39:21,744 INFO  [org.acm.sns.QuarksShieldAsyncResource] (sdk-async-response-4-3) Unsubscribed quarks shield for id = arn:aws:sns:us-east-1:000000000000:QuarksCollider:e1a5c39d-d5fe-498a-b0bb-e2db14dc38b9
2020-05-13 11:39:28,085 INFO  [org.acm.sns.QuarksShieldSyncResource] (executor-thread-1) Unsubscribed quarks shield for id = arn:aws:sns:us-east-1:000000000000:QuarksCollider:90576a46-46d9-4f1a-a8d0-53aa015fffc6

Using LocalStack

As a prerequisite, install the AWS Command Line Interface.

Start LocalStack:

docker run \
 --rm \
 --name local-sns \
 -p 4566:4566 \
 localstack/localstack

SNS listens on localhost:4566 for REST endpoints.

Create an AWS profile for your local instance using AWS CLI:

aws configure --profile localstack
AWS Access Key ID [None]: test-key
AWS Secret Access Key [None]: test-secret
Default region name [None]: us-east-1
Default output format [None]:

Create topic

Create a topic using AWS CLI with the localstack profile

aws sns create-topic --name=quarkus --profile localstack --endpoint-url=http://localhost:4566

Run the demo

You can compile the application and run it with:

./mvnw install
AWS_PROFILE=localstack java -Dquarkus.sns.endpoint-override=http://localhost:4566 -jar ./target/quarkus-app/quarkus-run.jar

Subscribe endpoint for topic notifications

Subscribe sync endpoint

curl -XPOST -H'Content-type: application/json' http://localhost:8080/sync/shield/subscribe

Subscribe async endpoint

curl -XPOST -H'Content-type: application/json' http://localhost:8080/async/shield/subscribe

See the Quarkus logs for messages similar to below

2020-05-13 11:31:52,415 INFO  [org.acm.sns.QuarksShieldSyncResource] (executor-thread-2) Subscription confirmed. Ready for quarks collisions.
2020-05-13 11:31:52,434 INFO  [org.acm.sns.QuarksShieldSyncResource] (executor-thread-1) Subscribed Quarks shield <http://host.docker.internal:8080/sync/shield> : arn:aws:sns:us-east-1:000000000000:QuarksCollider:b4121fa3-76e1-4b45-983d-b808561e7700 
2020-05-13 11:31:58,847 INFO  [org.acm.sns.QuarksShieldAsyncResource] (sdk-async-response-5-0) Subscription confirmed. Ready for quarks collisions.
2020-05-13 11:31:58,855 INFO  [org.acm.sns.QuarksShieldAsyncResource] (sdk-async-response-5-1) Subscribed Quarks shield with id = arn:aws:sns:us-east-1:000000000000:QuarksCollider:30c06833-a53b-4132-92cf-15017b076a9e

Running in native

You can compile the application into a native executable using:

./mvnw install -Dnative

And run it with:

AWS_PROFILE=localstack ./target/amazon-sns-quickstart-1.0.0-SNAPSHOT-runner -Dquarkus.sns.endpoint-override=http://localhost:4566

Running native in container

Build a native image in a container by running:

./mvnw install -Dnative -DskipTests -Dquarkus.native.container-build=true

Build a Docker image:

docker build -f src/main/docker/Dockerfile.native -t quarkus/amazon-sns-quickstart .

Create a network that connects your container with LocalStack:

docker network create localstack

Stop your LocalStack container you started at the beginning:

docker stop local-sns

Start LocalStack and connect to the network:

docker run \
  --rm \
  --name local-sns \
  --network=localstack \
  -p 4566:4566 \
  localstack/localstack

Create a queue:

aws sns create-topic --name=quarkus --profile localstack --endpoint-url=http://localhost:4566

Run the Quickstart container connected to that network (note that we're using the internal port of the LocalStack container):

docker run -i --rm --network=localstack \
  -p 8080:8080 \
  -e QUARKUS_SNS_ENDPOINT_OVERRIDE="http://local-sns:4566" \
  -e QUARKUS_SNS_AWS_REGION="us-east-1" \
  -e QUARKUS_SNS_AWS_CREDENTIALS_TYPE="static" \
  -e QUARKUS_SNS_AWS_CREDENTIALS_STATIC_PROVIDER_ACCESS_KEY_ID="test-key" \
  -e QUARKUS_SNS_AWS_CREDENTIALS_STATIC_PROVIDER_SECRET_ACCESS_KEY="test-secret" \
  quarkus/amazon-sns-quickstart

Replay some curl commands from above:

curl -XPOST -H'Content-type: application/json' http://localhost:8080/sync/shield/subscribe
curl -XPOST -H'Content-type: application/json' http://localhost:8080/sync/cannon/shoot -d'{"flavor": "Charm", "spin": "1/2"}'

Clean up your environment:

docker stop local-sns
docker network rm localstack

Using AWS account

Before you can use the AWS SDKs with SNS, you must get an AWS access key ID and secret access key. For more information, see:

Create a topic using AWS CLI and store the generated ARN in an environment variable as we will need to provide it to the our app:

TOPIC_ARN=`aws sns create-topic --name=QuarksCollider`

Run demo

You can run the demo the same way as for a local instance, but you don't need to override the endpoint as you are going to communicate with the AWS service with the default AWS profile.

Run it:

java -Dtopic.arn=$TOPIC_ARN -jar ./target/quarkus-app/quarkus-run.jar

Or, run it natively:

./target/amazon-sns-quickstart-1.0.0-SNAPSHOT-runner -Dtopic.arn=$TOPIC_ARN