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debezium-server

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Debezium Server runtime for standalone execution of Debezium connectors. Please log issues at https://github.com/debezium/dbz/issues.

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// repository documentation

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# Debezium Server

Debezium Server is a standalone Java application built on Quarkus framework.
The application itself contains the `core` module and a set of modules responsible for communication with different target systems.
## Building and Packaging

The following software is required to work with the Debezium codebase and build it locally:

* [Git](https://git-scm.com) 2.2.1 or later
* JDK 11 or later, e.g. [OpenJDK](http://openjdk.java.net/projects/jdk/)
* [Docker Engine](https://docs.docker.com/engine/install/) or [Docker Desktop](https://docs.docker.com/desktop/) 1.9 or later
* [Apache Maven](https://maven.apache.org/index.html) 3.8.4 or later  
  (or invoke the wrapper with `./mvnw` for Maven commands)

See the links above for installation instructions on your platform. You can verify the versions are installed and running:

$ git --version
    $ javac -version
    $ mvn -version

### Building the code

Debezium Server depends on core Debezium.  You'll need to install the most recent snapshot locally. First obtain the code by cloning the Git repository:

$ git clone https://github.com/debezium/debezium.git
    $ cd debezium

Then build the code using Maven:

$ mvn clean install -DskipITs -DskipTests

Then, you can build Debezium Server:

$ git clone https://github.com/debezium/debezium-server.git
    $ cd debezium-server
    $ mvn clean install -DskipITs -DskipTests

### Creating a Distribution

Debezium Server is normally run by downloading the distribution tar.gz or zip file.  You can generate this file by:

$ mvn clean package -DskipITs -DskipTests -Passembly

The archives can be found under `debezium-server-dist/target`.

#### Customizing Sink Modules in Distribution

By default, the distribution includes all available sink modules. You can customize which sinks are included using Maven profiles:

**Include all sinks (default):**
```bash
mvn clean package -DskipITs -DskipTests -Passembly
```

**Create a custom distribution with specific sinks only:**

First, use the `custom-distribution` profile to disable all sinks, then enable only the ones you need:

```bash
# Include only Kafka sink
mvn clean package -DskipITs -DskipTests -Passembly -Pcustom-distribution,sink-kafka

# Include multiple specific sinks (e.g., Kafka, Redis, and HTTP)
mvn clean package -DskipITs -DskipTests -Passembly -Pcustom-distribution,sink-kafka,sink-redis,sink-http
```

**Available sink profiles:**
- `sink-kinesis` - Amazon Kinesis
- `sink-sqs` - Amazon SQS
- `sink-sns` - Amazon SNS
- `sink-http` - HTTP
- `sink-pubsub` - Google Cloud Pub/Sub
- `sink-pulsar` - Apache Pulsar
- `sink-eventhubs` - Azure Event Hubs
- `sink-redis` - Redis
- `sink-kafka` - Apache Kafka
- `sink-pravega` - Pravega
- `sink-nats-streaming` - NATS Streaming
- `sink-nats-jetstream` - NATS JetStream
- `sink-infinispan` - Infinispan
- `sink-rabbitmq` - RabbitMQ
- `sink-rocketmq` - Apache RocketMQ
- `sink-milvus` - Milvus
- `sink-qdrant` - Qdrant
- `sink-instructlab` - InstructLab

This approach allows you to create smaller, more focused distributions that only include the sink modules you actually need.

### Building just the artifacts, without running tests, CheckStyle, etc.

You can skip all non-essential plug-ins (tests, integration tests, CheckStyle, formatter, API compatibility check, etc.) using the "quick" build profile:

$ mvn clean verify -Dquick

This provides the fastest way for solely producing the output artifacts, without running any of the QA related Maven plug-ins.
This comes in handy for producing connector JARs and/or archives as quickly as possible, e.g. for manual testing in Kafka Connect

## Integration Tests

The per-module integration tests depend on the availability of the external services.
It is thus recommended to execute integration tests per-module and set-up necessary pre-requisities beforehand.

Note: running these tests against external infrastructure may incur cost with your cloud provider.
We're not going to pay your AWS/GCP/Azure bill.

### Amazon Kinesis

* Execute `aws configure` as described in AWS CLI [getting started](https://github.com/aws/aws-cli#getting-started) guide and setup the account.
* Create Kinesis stream `aws kinesis create-stream --stream-name testc.inventory.customers --shard-count 1`
* Build the module and execute the tests `mvn clean install -DskipITs=false -am -pl debezium-server-kinesis`
* Remove the stream `aws kinesis delete-stream --stream-name testc.inventory.customers`

### Google Cloud Pub/Sub

* Login into your Google Cloud account using `gcloud auth application-default login` as described in the [documentation](https://cloud.google.com/sdk/gcloud/reference/auth/application-default).
* Build the module and execute the tests `mvn clean install -DskipITs=false -am -pl debezium-server-pubsub`

### Azure Event Hubs

Login into your Azure account and create a resource group, e.g. on the CLI:

```shell
az login
az group create --name eventhubstest --location westeurope
```

### Create an Event Hubs namespace

Create an [Event Hubs namespace](https://docs.microsoft.com/azure/event-hubs/event-hubs-features#namespace). Check the documentation for options on how do this using the [Azure Portal](https://docs.microsoft.com/azure/event-hubs/event-hubs-create#create-an-event-hubs-namespace), [Azure CLI](https://docs.microsoft.com/azure/event-hubs/event-hubs-quickstart-cli#create-an-event-hubs-namespace) etc., e.g. on the CLI:

```shell
az eventhubs namespace create --name debezium-test --resource-group eventhubstest -l westeurope
```

### Create an Event Hub

Create an Event Hub (equivalent to a topic) with 5 partitions. Check the documentation for options on how do this using the [Azure Portal](https://docs.microsoft.com/azure/event-hubs/event-hubs-create#create-an-event-hub), [Azure CLI](https://docs.microsoft.com/azure/event-hubs/event-hubs-quickstart-cli#create-an-event-hub) etc. , e.g. on the CLI:

```shell
`az eventhubs eventhub create` --name debezium-test-hub --resource-group eventhubstest --namespace-name debezium-test --partition-count 5
```

### Build the module

[Get the Connection string](https://docs.microsoft.com/azure/event-hubs/event-hubs-get-connection-string) required to communicate with Event Hubs. The format is: `Endpoint=sb://<NAMESPACE>/;SharedAccessKeyName=<ACCESS_KEY_NAME>;SharedAccessKey=<ACCESS_KEY_VALUE>`.
E.g. on the CLI:

```shell
az eventhubs namespace authorization-rule keys list --resource-group eventhubstest --namespace-name debezium-test --name RootManageSharedAccessKey
```

Set environment variables required for tests:

```shell
export EVENTHUBS_CONNECTION_STRING=<Event Hubs connection string>
export EVENTHUBS_NAME=<name of the Event hub created in previous step>
```

Execute the tests:

```shell
mvn clean install -DskipITs=false -Deventhubs.connection.string=$EVENTHUBS_CONNECTION_STRING -Deventhubs.hub.name=$EVENTHUBS_NAME -am -pl :debezium-server-eventhubs
```

### Examine Events in the Event Hub

E.g. using kafkacat. Create _kafkacat.conf_:

```shell
metadata.broker.list=debezium-test.servicebus.windows.net:9093
security.protocol=SASL_SSL
sasl.mechanisms=PLAIN
sasl.username=$ConnectionString
sasl.password=Endpoint=sb://debezium-test.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=<access key>
```

Start consuming events:

export KAFKACAT_CONFIG=<path to kafkacat.conf>
kafkacat -b debezium-test.servicebus.windows.net:9093 -t debezium-test-hub

### Clean up

Delete the Event Hubs namespace and log out, e.g. on the CLI:

```shell
az group delete -n eventhubstest
az logout
```

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