| # Camel-Kafka-connector NATS Source |
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| ## Introduction |
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| This is an example for Camel-Kafka-connector NATS Source |
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| ## What is needed |
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| - A NATS topic |
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| ## Running Kafka |
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| ``` |
| $KAFKA_HOME/bin/zookeeper-server-start.sh $KAFKA_HOME/config/zookeeper.properties |
| $KAFKA_HOME/bin/kafka-server-start.sh $KAFKA_HOME/config/server.properties |
| $KAFKA_HOME/bin/kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 1 --partitions 1 --topic mytopic |
| ``` |
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| ## Setting up the needed bits and running the example |
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| You'll need to setup the plugin.path property in your kafka |
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| Open the `$KAFKA_HOME/config/connect-standalone.properties` |
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| and set the `plugin.path` property to your choosen location |
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| In this example we'll use `/home/oscerd/connectors/` |
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| ``` |
| > cd /home/oscerd/connectors/ |
| > wget https://repo1.maven.org/maven2/org/apache/camel/kafkaconnector/camel-nats-kafka-connector/0.7.0/camel-nats-kafka-connector-0.7.0-package.zip |
| > unzip camel-nats-kafka-connector-0.7.0-package.zip |
| ``` |
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| In this example we'll use a docker image for NATS |
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| ``` |
| > docker run -d --name nats-main -p 4222:4222 -p 6222:6222 -p 8222:8222 nats |
| ``` |
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| We'll need to inspect the container for the IP address of NATS |
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| ``` |
| > docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' nats-main |
| 172.17.0.2 |
| ``` |
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| Now it's time to setup the connectors |
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| Open the NATS configuration file |
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| ``` |
| name=CamelNatsSourceConnector |
| connector.class=org.apache.camel.kafkaconnector.nats.CamelNatsSourceConnector |
| key.converter=org.apache.kafka.connect.storage.StringConverter |
| value.converter=org.apache.kafka.connect.converters.ByteArrayConverter |
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| camel.source.maxPollDuration=10000 |
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| topics=mytopic |
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| camel.component.nats.servers=172.17.0.2 |
| camel.source.path.topic=nats-main |
| ``` |
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| And add the correct address for the server. |
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| Now you can run the example |
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| ``` |
| $KAFKA_HOME/bin/connect-standalone.sh $KAFKA_HOME/config/connect-standalone.properties config/CamelNatsSourceConnector.properties |
| ``` |
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| To produce messages to NATS you can use nats-pub go executable |
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| ``` |
| > go get github.com/nats-io/go-nats-examples/tools/nats-pub |
| > nats-pub nats-main 'Kafka message' |
| Published [nats-main] : 'Kafka message' |
| ``` |
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| On a different terminal run the kafka-consumer and get messages |
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| ``` |
| > bin/kafka-console-consumer.sh --topic mytopic --from-beginning --bootstrap-server localhost:9092 |
| Kafka message |
| ``` |
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