hello-camel

0 Kafka without zookeeper

lsof -i tcp:9092 |grep LISTEN |awk '{ print $2 }' |xargs kill

ps aux |grep kafka |grep java |awk '{ print $2 }' |xargs kill


[install kafka without zookeeper](How to easily install kafka without zookeeper.md)

./bin/kafka-server-start.sh -daemon ./config/kraft/server1.properties ./bin/kafka-server-start.sh -daemon ./config/kraft/server2.properties ./bin/kafka-server-start.sh -daemon ./config/kraft/server3.properties


## 1 Camel Springboot

### Springboot

#### 1 kafka-offsetrepository[example]

https://github.com/apache/camel-spring-boot-examples

```bash
./bin/kafka-topics.sh --create --topic my-topic --partitions 1 --replication-factor 1 --bootstrap-server localhost:9092

bin/kafka-topics.sh --bootstrap-server localhost:9093 --list

$ cd camel-spring-boot-examples/kafka-offsetrepository
$ mvn spring-boot:run

2021-08-16 01:37:06.501  INFO 44458 --- [ducer[my-topic]] o.a.c.e.k.o.KafkaProcessor               : producer partition is:0
2021-08-16 01:37:06.503  INFO 44458 --- [sumer[my-topic]] consumer-route1                          : consumer >>> This is first producer: 86A76814921F073-0000000000000014
2021-08-16 01:37:07.502  INFO 44458 --- [ducer[my-topic]] producer-route-1                         : producer >>> This is first producer: 86A76814921F073-0000000000000015
2021-08-16 01:37:07.503  INFO 44458 --- [ducer[my-topic]] o.a.c.e.k.o.KafkaProcessor               : producer partition is:0
2021-08-16 01:37:07.504  INFO 44458 --- [sumer[my-topic]] consumer-route1                          : consumer >>> This is first producer: 86A76814921F073-0000000000000015
2021-08-16 01:37:08.507  INFO 44458 --- [ducer[my-topic]] producer-route-1                         : producer >>> This is first producer: 86A76814921F073-0000000000000016

2 rabbitmq[example]

docker run -it -p 5672:5672 --hostname rabbit3Camel --name rabbit3Camel rabbitmq:3

$ cd camel-spring-boot-examples/rabbitmq
$ mvn spring-boot:run

2021-08-16 01:21:38.467  INFO 40987 --- [pool-1-thread-4] route3                                   : From RabbitMQ: Random number 12
2021-08-16 01:21:38.468  INFO 40987 --- [pool-1-thread-5] route3                                   : From RabbitMQ: Bigger random number 161
2021-08-16 01:21:39.456  INFO 40987 --- [pool-1-thread-6] route3                                   : From RabbitMQ: Random number 75
2021-08-16 01:21:40.457  INFO 40987 --- [pool-1-thread-7] route3                                   : From RabbitMQ: Random number 88
2021-08-16 01:21:40.463  INFO 40987 --- [pool-1-thread-8] route3                                   : From RabbitMQ: Bigger random number 126
2021-08-16 01:21:41.461  INFO 40987 --- [pool-1-thread-9] route3                                   : From RabbitMQ: Random number 80
2021-08-16 01:21:42.466  INFO 40987 --- [ool-1-thread-10] route3                                   : From RabbitMQ: Random number 62

2 Camel Quarkus

1 GraalVM

https://www.graalvm.org/docs/getting-started/macos

https://github.com/graalvm/graalvm-ce-builds/releases

sudo xattr -r -d com.apple.quarantine /Library/Java/JavaVirtualMachines/graalvm-ce-java16-21.2.0

GRAALVM_HOME=/Library/Java/JavaVirtualMachines/graalvm-ce-java16-21.2.0
export PATH=$GRAALVM_HOME/Contents/Home/bin:$PATH
export JAVA_HOME=$GRAALVM_HOME/Contents/Home

2 Quarkus

https://quarkus.io/guides

调试

./mvnw compile quarkus:dev

JVM构建和启动

./mvnw clean package
java -jar target/quarkus-app/quarkus-run.jar

Native构建和启动

./mvnw clean package -Pnative
./target/*-runner

3 Camel-Quarkus

first-steps

https://camel.apache.org/camel-quarkus/latest/user-guide/first-steps.html

mvn io.quarkus:quarkus-maven-plugin:2.1.1.Final:create \
    -DprojectGroupId=org.feuyeux.camel \
    -DprojectArtifactId=camel-quarkus \
    -Dextensions=camel-quarkus-log,camel-quarkus-timer

cd camel-quarkus
./mvnw compile quarkus:dev

curl http://localhost:8080/hello

rest-json[example]

https://camel.apache.org/camel-quarkus/latest/user-guide/examples.html

$ cd camel-quarkus-examples/rest-json
$ mvn clean compile quarkus:dev

$ curl http://localhost:8080/fruits
[{"name":"Apple","description":"Winter fruit"},{"name":"Pineapple","description":"Tropical fruit"}]

$ curl http://localhost:8080/legumes
[{"name":"Carrot","description":"Root vegetable, usually orange"},{"name":"Zucchini","description":"Summer squash"}]

$ curl http://localhost:8080/fruits -H "Content-Type: application/json" -XPOST -d '{"name": "orange","description": "Nice!"}'
[{"name":"Apple","description":"Winter fruit"},{"name":"Pineapple","description":"Tropical fruit"},{"name":"orange","description":"Nice!"}]

$ curl http://localhost:8080/fruits
[{"name":"Apple","description":"Winter fruit"},{"name":"Pineapple","description":"Tropical fruit"},{"name":"orange","description":"Nice!"}]

kafka[example]

$ cd camel-quarkus-examples/kafka
$ mvn clean compile quarkus:dev -Dkafka.bootstrap.servers=localhost:9092,localhost:9093,localhost:9094

SEDA(Staged Event Driven Architecture)

$ curl -X GET http://0.0.0.0:8080/example
Message #5

3 Camel K

TODO Kubernetes

feuyeux / hello-camel