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Composite API with Camel

 ┌────────────────────┐           ┌─────────────────────┐ 
 │                    │           │                     │ 
 │  REST Service 1    │◄──────────┤ ◄─────┐             │ ◄──── REST API request
 │                    │           │       │             │ 
 └────────────────────┘           │    1. parallel      │
 ┌────────────────────┐           │       │             │ 
 │                    │           │       │             │ 
 │  REST Service 2    │◄──────────┤ ◄─────┘             │ 
 │                    │           │                     │ 
 └────────────────────┘           │    2. aggregate     │
 ┌────────────────────┐           │                     │ 
 │                    │           │                     │ 
 │    SaaS (AWS S3)   │◄──────────┤    3. publish       │ 
 │                    │           │                     │ 
 └────────────────────┘           │                     │ 
 ┌────────────────────┐           │                     │ 
 │                    │           │                     │ 
 │       Kafka        │◄──────────┤     3. enrich       │ 
 │                    │           │                     │ ────► REST API response
 └────────────────────┘           └─────────────────────┘

How to

Start Kafka and Keycloak

docker─compose up

Start Kafka consumer to view demo topic

docker-compose exec broker  kafka-console-consumer --bootstrap-server broker:9092 --topic demo --from-beginning

Create realm in Keycloak

Add new realm from realm JSON file

More info :https://www.keycloak.org/docs/latest/server_admin/index.html#_create-realm

Build and start services

cd ../oauth2-service
export JAVA_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home
mvn clean package
java -Dquarkus.http.port=8081 -jar target/quarkus-app/quarkus-run.jar
java -Dquarkus.http.port=8082 -jar target/quarkus-app/quarkus-run.jar

Get token

Get token

    curl --insecure -X POST https://localhost:8543/auth/realms/quarkus/protocol/openid-connect/token \
    --user backend-service:secret \
    -H 'content-type: application/x-www-form-urlencoded' \
    -d 'username=admin&password=admin&grant_type=password' | jq --raw-output '.access_token'

Set in application.properties

token=...

Get AWS access and secret keys

Create access key in AWS AIM Console

Set in application.properties

camel.component.aws-s3.configuration.access-key=...
camel.component.aws-s3.configuration.secret-key=...

AWS S3 file

https://s3.console.aws.amazon.com/s3/buckets/hipdemo?region=us-east-1&tab=objects

Run service

mvn spring-boot:run

Call service

curl -v GET  http://localhost:8080/api/demo