docs/io-rabbitmq-source.md

id: io-rabbitmq-source title: RabbitMQ source connector sidebar_label: “RabbitMQ source connector”

:::note

You can download all the Pulsar connectors on download page.

:::

The RabbitMQ source connector receives messages from RabbitMQ clusters and writes messages to Pulsar topics.

Configuration

The configuration of the RabbitMQ source connector has the following properties.

Property

Name	Type	Required	Default	Description
`connectionName`	String	true	(empty string)	The connection name.
`host`	String	true	(empty string)	The RabbitMQ host.
`port`	int	true	5672	The RabbitMQ port.
`virtualHost`	String	true	/	The virtual host used to connect to RabbitMQ.
`username`	String	false	guest	The username used to authenticate to RabbitMQ.
`password`	String	false	guest	The password used to authenticate to RabbitMQ.
`queueName`	String	true	(empty string)	The RabbitMQ queue name that messages should be read from or written to.
`requestedChannelMax`	int	false	0	The initially requested maximum channel number. 0 means unlimited.
`requestedFrameMax`	int	false	0	The initially requested maximum frame size in octets. 0 means unlimited.
`connectionTimeout`	int	false	60000	The timeout of TCP connection establishment in milliseconds. 0 means infinite.
`handshakeTimeout`	int	false	10000	The timeout of AMQP0-9-1 protocol handshake in milliseconds.
`requestedHeartbeat`	int	false	60	The requested heartbeat timeout in seconds.
`prefetchCount`	int	false	0	The maximum number of messages that the server delivers. 0 means unlimited.
`prefetchGlobal`	boolean	false	false	Whether the setting should be applied to the entire channel rather than each consumer.
`passive`	boolean	false	false	Whether the rabbitmq consumer should create its own queue or bind to an existing one.

Example

Before using the RabbitMQ source connector, you need to create a configuration file through one of the following methods.

JSON

{
   "configs": {
      "host": "localhost",
      "port": "5672",
      "virtualHost": "/",
      "username": "guest",
      "password": "guest",
      "queueName": "test-queue",
      "connectionName": "test-connection",
      "requestedChannelMax": "0",
      "requestedFrameMax": "0",
      "connectionTimeout": "60000",
      "handshakeTimeout": "10000",
      "requestedHeartbeat": "60",
      "prefetchCount": "0",
      "prefetchGlobal": "false",
      "passive": "false"
   }
}

YAML

configs:
    host: "localhost"
    port: 5672
    virtualHost: "/"
    username: "guest"
    password: "guest"
    queueName: "test-queue"
    connectionName: "test-connection"
    requestedChannelMax: 0
    requestedFrameMax: 0
    connectionTimeout: 60000
    handshakeTimeout: 10000
    requestedHeartbeat: 60
    prefetchCount: 0
    prefetchGlobal: "false"
    passive: "false"

Usage

Standalone mode

This example describes how to use the RabbitMQ source connector to feed data from RabbitMQ and write data to Pulsar topics in the standalone mode.

Prerequisites

There is a RabbitMQ server with some history messages in the queue.

Steps

Get a Pulsar package and start Pulsar in standalone mode.

curl -LO "https://www.apache.org/dyn/closer.lua/pulsar/pulsar-@pulsar:version@/apache-pulsar-@pulsar:version@-bin.tar.gz?action=download"
tar xvfz apache-pulsar-@pulsar:version@-bin.tar.gz
cd apache-pulsar-@pulsar:version@
bin/pulsar standalone

Download the nar package corresponding to Pulsar‘s version and copy the following file to Pulsar’s directory.

cd connectors
curl -LO "https://www.apache.org/dyn/closer.lua/pulsar/pulsar-@pulsar:version@/connectors/pulsar-io-rabbitmq-@pulsar:version@.nar?action=download"

Messages published to a topic lacking at least one durable subscription are automatically marked as ready for deletion by default. We can set a retention policy at the namespace level to prevent this.
```
./bin/pulsar-admin namespaces set-retention -s 100M -t 3d public/default
```

Prepare a configuration file with name is rabbitmq-source-queue-name.yaml.

 configs:
   host: "localhost"
   port: 5672
   virtualHost: "/"
   username: "guest"
   password: "guest"
   queueName: "test-queue"
   connectionName: "test-connection"
   requestedChannelMax: 0
   requestedFrameMax: 0
   connectionTimeout: 60000
   handshakeTimeout: 10000
   requestedHeartbeat: 60
   prefetchCount: 0
   prefetchGlobal: "false"
   passive: "false"

Copy the configuration file to Pulsar‘s conf directory.

cp rabbitmq-source-queue-name.yaml ./conf

Open a new terminal window and start the connector in local run mode.

./bin/pulsar-admin source localrun \
 --source-config-file $PWD/conf/rabbitmq-source-queue-name.yaml \
 --archive $PWD/connectors/pulsar-io-rabbitmq-@pulsar:version@.nar \
 --name rabbitmq-source \
 --destination-topic-name pulsar-rabbitmq-test-topic \
 --broker-service-url pulsar://{ip}:{port}

Open a new terminal window and check the topic is created automatically.
```
./bin/pulsar-admin topics list public/default \
```
This topic is created automatically as follows:
```
persistent://public/default/pulsar-rabbitmq-test-topic-partition-0
```

Consume this topic.

./bin/pulsar-client consume persistent://public/default/pulsar-rabbitmq-test-topic-partition-0 -s s1 -n 0 -p Earliest

The following information appears on the consumer terminal window.

   ----- got message -----
   key:[quick.orange.pulsar], properties:[], content:message-topic-O(range) 0
   ----- got message -----
   key:[quick.orange.pulsar], properties:[], content:message-topic-O(range) 1

   ... ...