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Camel-Kafka-connector Git Source for consuming Commit

This is an example for Camel-Kafka-connector Git Source for consuming Commit

Standalone

What is needed

  • A local git repository

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

Download the connector package

Download the connector package tar.gz and extract the content to a directory. In this example we’ll use /home/oscerd/connectors/

> cd /home/oscerd/connectors/
> wget https://repo1.maven.org/maven2/org/apache/camel/kafkaconnector/camel-git-kafka-connector/0.10.0/camel-git-kafka-connector-0.10.0-package.tar.gz
> untar.gz camel-git-kafka-connector-0.10.0-package.tar.gz

Configuring Kafka Connect

You’ll need to set up 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:

...
plugin.path=/home/oscerd/connectors
...

Setup the git repository

We’ll need a git repository at the beginning.

> mkdir -p /tmp/test_repo/
> cd /tmp/test_repo/
> git init
> touch test.txt
> git add test.txt
> git commit -a -m "first commit"

Now we are ready to go

Setup the connectors

Open the Git configuration file at $EXAMPLES/git/git-source-commit/config/CamelGitSourceConnector.properties

name=CamelGitSourceConnector
connector.class=org.apache.camel.kafkaconnector.git.CamelGitSourceConnector
tasks.max=1
key.converter=org.apache.kafka.connect.storage.StringConverter
value.converter=org.apache.kafka.connect.storage.StringConverter

topics=mytopic

camel.source.path.localPath=/tmp/test_repo/
camel.source.endpoint.branchName=master
camel.source.endpoint.type=commit

Running the example

Run the kafka connect with the Git Source connector:

$KAFKA_HOME/bin/connect-standalone.sh $KAFKA_HOME/config/connect-standalone.properties $EXAMPLES/git/git-source-commit/config/CamelGitSourceConnector.properties

On a different terminal run the kafkacat consumer

> ./kafkacat -b  localhost:9092 -t mytopic -f 'Headers: %h Value: %s'
% Auto-selecting Consumer mode (use -P or -C to override)
Headers: CamelHeader.CamelGitAuthorName=Andrea Cosentino,CamelHeader.CamelGitCommiterName=Andrea Cosentino,CamelHeader.CamelGitCommitTime=1604597964,CamelProperty.CamelToEndpoint=direct://end?pollingConsumerBlockTimeout=0&pollingConsumerBlockWhenFull=true&pollingConsumerQueueSize=1000 Value: first commit
% Reached end of topic mytopic [0] at offset 1

Now let’s commit something else

> cd /tmp/test_repo/
> touch test1.txt
> git add test1.txt
> git commit -a -m "second commit"

Getting back to the consumer terminal we should see something like

Headers: CamelHeader.CamelGitAuthorName=Andrea Cosentino,CamelHeader.CamelGitCommiterName=Andrea Cosentino,CamelHeader.CamelGitCommitTime=1609839093,CamelProperty.CamelToEndpoint=direct://end?pollingConsumerBlockTimeout=0&pollingConsumerBlockWhenFull=true&pollingConsumerQueueSize=1000 Value: second commit
% Reached end of topic mytopic [0] at offset 2