exec/exec-sink/README.adoc

# Camel-Kafka-connector Exec Sink

This is an example for Camel-Kafka-connector Exec Sink 

## Standalone

### What is needed

- The touch command

### Running Kafka

```
$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
```

### Setting up the needed bits and running the example

You'll need to setup the plugin.path property in your kafka

Open the `$KAFKA_HOME/config/connect-standalone.properties`

and set the `plugin.path` property to your choosen location

In this example we'll use `/home/oscerd/connectors/`

```
> cd /home/oscerd/connectors/
> wget https://repo1.maven.org/maven2/org/apache/camel/kafkaconnector/camel-exec-kafka-connector/0.11.5/camel-exec-kafka-connector-0.11.5-package.tar.gz
> untar.gz camel-exec-kafka-connector-0.11.5-package.tar.gz
```

Now it's time to setup the connectors

Open the Exec sink configuration file

```
name=CamelExecSinkConnector
connector.class=org.apache.camel.kafkaconnector.exec.CamelExecSinkConnector
key.converter=org.apache.kafka.connect.storage.StringConverter
value.converter=org.apache.kafka.connect.storage.StringConverter

topics=mytopic

camel.sink.path.executable=touch
camel.sink.endpoint.args=/tmp/${body}-${headers.detail}.txt 
```

Set the correct options in the file.

Now you can run the example

```
$KAFKA_HOME/bin/connect-standalone.sh $KAFKA_HOME/config/connect-standalone.properties config/CamelExecSinkConnector.properties
```

You'll need to send messages to mytopic. You can run the simple producer included in this project. So cd in the folder:

```
> cd camel-kafka-exec-simple-producer
> mvn compile exec:exec -Dkafka.topic.name=mytopic -Dkafka.key=1 -Dcamel.body="FileName" -Dcamel.header.detail="detail1"
```

Under tmp folder you should see the file created

```
> cd /tmp/
> ls | grep FileName
FileName-detail1.txt
```

In the mytopic topic you should see the message too

```
> ./kafkacat -b localhost:9092 -t mytopic -f 'Headers: %h: Message value: %s\n'
Headers: CamelHeader.detail=detail1: Message value: FileName
% Reached end of topic mytopic [0] at offset 1
```