How to use Pulsar connectors

This guide describes how to use Pulsar connectors.

Install a connector

Pulsar bundles several builtin connectors used to move data in and out of commonly used systems (such as database and messaging system). Optionally, you can create and use your desired non-builtin connectors.

note

When using a non-builtin connector, you need to specify the path of a archive file for the connector.

To set up a builtin connector, follow the instructions here.

After the setup, the builtin connector is automatically discovered by Pulsar brokers (or function-workers), so no additional installation steps are required.

Configure a connector

You can configure the following information:

• Configure a default storage location for a connector

• Configure a connector with a YAML file

Configure a default storage location for a connector

To configure a default folder for builtin connectors, set the connectorsDirectory parameter in the ./conf/functions_worker.yml configuration file.

Example

Set the ./connectors folder as the default storage location for builtin connectors.

########################
# Connectors
########################

connectorsDirectory: ./connectors

Configure a connector with a YAML file

To configure a connector, you need to provide a YAML configuration file when creating a connector.

The YAML configuration file tells Pulsar where to locate connectors and how to connect connectors with Pulsar topics.

Example 1

Below is a YAML configuration file of a Cassandra sink, which tells Pulsar:

• Which Cassandra cluster to connect

• What is the keyspace and columnFamily to be used in Cassandra for collecting data

• How to map Pulsar messages into Cassandra table key and columns

tenant: public
namespace: default
name: cassandra-test-sink
...
# cassandra specific config
configs:
    roots: "localhost:9042"
    keyspace: "pulsar_test_keyspace"
    columnFamily: "pulsar_test_table"
    keyname: "key"
    columnName: "col"

Example 2

Below is a YAML configuration file of a Kafka source.

configs:
   bootstrapServers: "pulsar-kafka:9092"
   groupId: "test-pulsar-io"
   topic: "my-topic"
   sessionTimeoutMs: "10000"
   autoCommitEnabled: "false"

Example 3

Below is a YAML configuration file of a PostgreSQL JDBC sink.

configs:
   userName: "postgres"
   password: "password"
   jdbcUrl: "jdbc:postgresql://localhost:5432/test_jdbc"
   tableName: "test_jdbc"

Get available connectors

Before starting using connectors, you can perform the following operations:

• Reload connectors

• Get a list of available connectors

reload

If you add or delete a nar file in a connector folder, reload the available builtin connector before using it.

Source

Use the reload subcommand.

$ pulsar-admin sources reload

For more information, see here.

Sink

Use the reload subcommand.

$ pulsar-admin sinks reload

For more information, see here.

available

After reloading connectors (optional), you can get a list of available connectors.

Source

Use the available-sources subcommand.

$ pulsar-admin sources available-sources

Sink

Use the available-sinks subcommand.

$ pulsar-admin sinks available-sinks

Run a connector

To run a connector, you can perform the following operations:

• Create a connector

• Start a connector

• Run a connector locally

create

You can create a connector using Admin CLI, REST API or JAVA admin API.

Source

Create a source connector.

Admin CLI

Use the create subcommand.

$ pulsar-admin sources create options

For more information, see here.

REST API

Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sourceName/registerSource

Java Admin API

• Create a source connector with a local file.

  
  void createSource(SourceConfig sourceConfig,
                    String fileName)
             throws PulsarAdminException
  

  Parameter

  Name	Description
  sourceConfig	The source configuration object

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see createSource.

• Create a source connector using a remote file with a URL from which fun-pkg can be downloaded.

  
  void createSourceWithUrl(SourceConfig sourceConfig,
                           String pkgUrl)
                    throws PulsarAdminException
  

  Supported URLs are http and file.

  Example

  • HTTP: http://www.repo.com/fileName.jar

  • File: file:///dir/fileName.jar

  Parameter

  Parameter	Description
  sourceConfig	The source configuration object
  pkgUrl	URL from which pkg can be downloaded

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see createSourceWithUrl.

Sink

Create a sink connector.

Admin CLI

Use the create subcommand.

$ pulsar-admin sinks create options

For more information, see here.

REST API

Send a POST request to this endpoint: POST /admin/v3/sinks/:tenant/:namespace/:sinkName/registerSink

Java Admin API

• Create a sink connector with a local file.

  
  void createSink(SinkConfig sinkConfig,
                  String fileName)
           throws PulsarAdminException
  

  Parameter

  Name	Description
  sinkConfig	The sink configuration object

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see createSink.

• Create a sink connector using a remote file with a URL from which fun-pkg can be downloaded.

  
  void createSinkWithUrl(SinkConfig sinkConfig,
                      String pkgUrl)
                  throws PulsarAdminException
  

  Supported URLs are http and file.

  Example

  • HTTP: http://www.repo.com/fileName.jar

  • File: file:///dir/fileName.jar

  Parameter

  Parameter	Description
  sinkConfig	The sink configuration object
  pkgUrl	URL from which pkg can be downloaded

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see createSinkWithUrl.

start

You can start a connector using Admin CLI or REST API.

Source

Start a source connector.

Admin CLI

Use the start subcommand.

$ pulsar-admin sources start options

For more information, see here.

REST API

• Start all source connectors.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sourceName/start/startSource

• Start a specified source connector.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sourceName/:instanceId/start/startSource

Sink

Start a sink connector.

Admin CLI

Use the start subcommand.

$ pulsar-admin sinks start options

For more information, see here.

REST API

• Start all sink connectors.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sinkName/start/startSink

• Start a specified sink connector.

  Send a POST request to this endpoint: POST /admin/v3/sinks/:tenant/:namespace/:sourceName/:instanceId/start/startSink

localrun

You can run a connector locally rather than deploying it on a Pulsar cluster using Admin CLI.

Source

Run a source connector locally.

Admin CLI

Use the localrun subcommand.

$ pulsar-admin sources localrun options

For more information, see here.

Sink

Run a sink connector locally.

Admin CLI

Use the localrun subcommand.

$ pulsar-admin sinks localrun options

For more information, see here.

Monitor a connector

To monitor a connector, you can perform the following operations:

• Get the information of a connector

• Get the list of all running connectors

• Get the current status of a connector

get

You can get the information of a connector using Admin CLI, REST API or JAVA admin API.

Source

Get the information of a source connector.

Admin CLI

Use the get subcommand.

$ pulsar-admin sources get options

For more information, see here.

REST API

Send a GET request to this endpoint: GET /admin/v3/sources/:tenant/:namespace/:sourceName/getSourceInfo

Java Admin API

SourceConfig getSource(String tenant,
                       String namespace,
                       String source)
                throws PulsarAdminException

Example

This is a sourceConfig.

{
 "tenant": "tenantName",
 "namespace": "namespaceName",
 "name": "sourceName",
 "className": "className",
 "topicName": "topicName",
 "configs": {},
 "parallelism": 1,
 "processingGuarantees": "ATLEAST_ONCE",
 "resources": {
   "cpu": 1.0,
   "ram": 1073741824,
   "disk": 10737418240
 }
}

This is a sourceConfig example.

{
 "tenant": "public",
 "namespace": "default",
 "name": "debezium-mysql-source",
 "className": "org.apache.pulsar.io.debezium.mysql.DebeziumMysqlSource",
 "topicName": "debezium-mysql-topic",
 "configs": {
   "database.user": "debezium",
   "database.server.id": "184054",
   "database.server.name": "dbserver1",
   "database.port": "3306",
   "database.hostname": "localhost",
   "database.password": "dbz",
   "database.history.pulsar.service.url": "pulsar://127.0.0.1:6650",
   "value.converter": "org.apache.kafka.connect.json.JsonConverter",
   "database.whitelist": "inventory",
   "key.converter": "org.apache.kafka.connect.json.JsonConverter",
   "database.history": "org.apache.pulsar.io.debezium.PulsarDatabaseHistory",
   "pulsar.service.url": "pulsar://127.0.0.1:6650",
   "database.history.pulsar.topic": "history-topic2"
 },
 "parallelism": 1,
 "processingGuarantees": "ATLEAST_ONCE",
 "resources": {
   "cpu": 1.0,
   "ram": 1073741824,
   "disk": 10737418240
 }
}

Exception

Exception name	Description
PulsarAdminException.NotAuthorizedException	You don't have the admin permission
PulsarAdminException.NotFoundException	Cluster doesn't exist
PulsarAdminException	Unexpected error

For more information, see getSource.

Sink

Get the information of a sink connector.

Admin CLI

Use the get subcommand.

$ pulsar-admin sinks get options

For more information, see here.

REST API

Send a GET request to this endpoint: GET /admin/v3/sinks/:tenant/:namespace/:sinkName/getSinkInfo

Java Admin API

SinkConfig getSink(String tenant,
                   String namespace,
                   String sink)
            throws PulsarAdminException

Example

This is a sinkConfig.

{
"tenant": "tenantName",
"namespace": "namespaceName",
"name": "sinkName",
"className": "className",
"inputSpecs": {
"topicName": {
    "isRegexPattern": false
}
},
"configs": {},
"parallelism": 1,
"processingGuarantees": "ATLEAST_ONCE",
"retainOrdering": false,
"autoAck": true
}

This is a sinkConfig example.

{
  "tenant": "public",
  "namespace": "default",
  "name": "pulsar-postgres-jdbc-sink",
  "className": "org.apache.pulsar.io.jdbc.PostgresJdbcAutoSchemaSink",
  "inputSpecs": {
  "pulsar-postgres-jdbc-sink-topic": {
     "isRegexPattern": false
    }
  },
  "configs": {
    "password": "password",
    "jdbcUrl": "jdbc:postgresql://localhost:5432/pulsar_postgres_jdbc_sink",
    "userName": "postgres",
    "tableName": "pulsar_postgres_jdbc_sink"
  },
  "parallelism": 1,
  "processingGuarantees": "ATLEAST_ONCE",
  "retainOrdering": false,
  "autoAck": true
}

Parameter description

Name	Description
tenant	Tenant name
namespace	Namespace name
sink	Sink name

For more information, see getSink.

list

You can get the list of all running connectors using Admin CLI, REST API or JAVA admin API.

Source

Get the list of all running source connectors.

Admin CLI

Use the list subcommand.

$ pulsar-admin sources list options

For more information, see here.

REST API

Send a GET request to this endpoint: GET /admin/v3/sources/:tenant/:namespace/listSources

Java Admin API

List<String> listSources(String tenant,
                         String namespace)
                  throws PulsarAdminException

Response example

["f1", "f2", "f3"]

Exception

Exception name	Description
PulsarAdminException.NotAuthorizedException	You don't have the admin permission
PulsarAdminException	Unexpected error

For more information, see listSource.

Sink

Get the list of all running sink connectors.

Admin CLI

Use the list subcommand.

$ pulsar-admin sinks list options

For more information, see here.

REST API

Send a GET request to this endpoint: GET /admin/v3/sinks/:tenant/:namespace/listSinks

Java Admin API

List<String> listSinks(String tenant,
                       String namespace)
                throws PulsarAdminException

Response example

["f1", "f2", "f3"]

Exception

Exception name	Description
PulsarAdminException.NotAuthorizedException	You don't have the admin permission
PulsarAdminException	Unexpected error

For more information, see listSource.

status

You can get the current status of a connector using Admin CLI, REST API or JAVA admin API.

Source

Get the current status of a source connector.

Admin CLI

Use the status subcommand.

$ pulsar-admin sources status options

For more information, see here.

REST API

• Get the current status of all source connectors.

  Send a GET request to this endpoint: GET /admin/v3/sources/:tenant/:namespace/:sourceName/status/getSourceStatus

• Gets the current status of a specified source connector.

  Send a GET request to this endpoint: GET /admin/v3/sources/:tenant/:namespace/:sourceName/:instanceId/status/getSourceStatus

Java Admin API

• Get the current status of all source connectors.

  
  SourceStatus getSourceStatus(String tenant,
                              String namespace,
                              String source)
                      throws PulsarAdminException
  

  Parameter

  Parameter	Description
  tenant	Tenant name
  namespace	Namespace name
  sink	Source name

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see getSourceStatus.

• Gets the current status of a specified source connector.

  
  SourceStatus.SourceInstanceStatus.SourceInstanceStatusData getSourceStatus(String tenant,
                                                                             String namespace,
                                                                             String source,
                                                                             int id)
                                                                      throws PulsarAdminException
  

  Parameter

  Parameter	Description
  tenant	Tenant name
  namespace	Namespace name
  sink	Source name
  id	Source instanceID

  Exception

  Exception name	Description
  PulsarAdminException	Unexpected error

  For more information, see getSourceStatus.

Sink

Get the current status of a Pulsar sink connector.

Admin CLI

Use the status subcommand.

$ pulsar-admin sinks status options

For more information, see here.

REST API

• Get the current status of all sink connectors.

  Send a GET request to this endpoint: GET /admin/v3/sinks/:tenant/:namespace/:sinkName/status/getSinkStatus

• Gets the current status of a specified sink connector.

  Send a GET request to this endpoint: GET /admin/v3/sinks/:tenant/:namespace/:sourceName/:instanceId/status/getSinkInstanceStatus

Java Admin API

• Get the current status of all sink connectors.

  
  SinkStatus getSinkStatus(String tenant,
                           String namespace,
                           String sink)
                    throws PulsarAdminException
  

  Parameter

  Parameter	Description
  tenant	Tenant name
  namespace	Namespace name
  sink	Source name

  Exception

  Exception name	Description
  PulsarAdminException	Unexpected error

  For more information, see getSinkStatus.

• Gets the current status of a specified source connector.

  
  SinkStatus.SinkInstanceStatus.SinkInstanceStatusData getSinkStatus(String tenant,
                                                                     String namespace,
                                                                     String sink,
                                                                     int id)
                                                              throws PulsarAdminException
  

  Parameter

  Parameter	Description
  tenant	Tenant name
  namespace	Namespace name
  sink	Source name
  id	Sink instanceID

  Exception

  Exception name	Description
  PulsarAdminException	Unexpected error

  For more information, see getSinkStatusWithInstanceID.

Update a connector

update

You can update a running connector using Admin CLI, REST API or JAVA admin API.

Source

Update a running Pulsar source connector.

Admin CLI

Use the update subcommand.

$ pulsar-admin sources update options

For more information, see here.

REST API

Send a PUT request to this endpoint: PUT /admin/v3/sources/:tenant/:namespace/:sourceName/updateSource

Java Admin API

• Update a running source connector with a local file.

  
  void updateSource(SourceConfig sourceConfig,
                  String fileName)
          throws PulsarAdminException
  

  Parameter

  Name	Description
  sourceConfig	The source configuration object

  Exception

  Name	Description
  PulsarAdminException.NotAuthorizedException	You don't have the admin permission
  PulsarAdminException.NotFoundException	Cluster doesn't exist
  PulsarAdminException	Unexpected error

  For more information, see updateSource.

• Update a source connector using a remote file with a URL from which fun-pkg can be downloaded.

  
  void updateSourceWithUrl(SourceConfig sourceConfig,
                       String pkgUrl)
                throws PulsarAdminException
  

  Supported URLs are http and file.

  Example

  • HTTP: http://www.repo.com/fileName.jar

  • File: file:///dir/fileName.jar

  Parameter

  Name	Description
  sourceConfig	The source configuration object
  pkgUrl	URL from which pkg can be downloaded

  Exception

  Name	Description
  PulsarAdminException.NotAuthorizedException	You don't have the admin permission
  PulsarAdminException.NotFoundException	Cluster doesn't exist
  PulsarAdminException	Unexpected error

For more information, see createSourceWithUrl.

Sink

Update a running Pulsar sink connector.

Admin CLI

Use the update subcommand.

$ pulsar-admin sinks update options

For more information, see here.

REST API

Send a PUT request to this endpoint: PUT /admin/v3/sinks/:tenant/:namespace/:sinkName/updateSink

Java Admin API

• Update a running sink connector with a local file.

  
  void updateSink(SinkConfig sinkConfig,
                  String fileName)
       throws PulsarAdminException
  

  Parameter

  Name	Description
  sinkConfig	The sink configuration object

  Exception

  Name	Description
  PulsarAdminException.NotAuthorizedException	You don't have the admin permission
  PulsarAdminException.NotFoundException	Cluster doesn't exist
  PulsarAdminException	Unexpected error

  For more information, see updateSink.

• Update a sink connector using a remote file with a URL from which fun-pkg can be downloaded.

  
  void updateSinkWithUrl(SinkConfig sinkConfig,
                         String pkgUrl)
                  throws PulsarAdminException
  

  Supported URLs are http and file.

  Example

  • HTTP: http://www.repo.com/fileName.jar

  • File: file:///dir/fileName.jar

  Parameter

  Name	Description
  sinkConfig	The sink configuration object
  pkgUrl	URL from which pkg can be downloaded

  Exception

  Name	Description
  PulsarAdminException.NotAuthorizedException	You don't have the admin permission
  PulsarAdminException.NotFoundException	Cluster doesn't exist
  PulsarAdminException	Unexpected error

For more information, see updateSinkWithUrl.

Stop a connector

stop

You can stop a connector using Admin CLI, REST API or JAVA admin API.

Source

Stop a source connector.

Admin CLI

Use the stop subcommand.

$ pulsar-admin sources stop options

For more information, see here.

REST API

• Stop all source connectors.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sourceName/stopSource

• Stop a specified source connector.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sourceName/:instanceId/stopSource

Java Admin API

• Stop all source connectors.

  
  void stopSource(String tenant,
                  String namespace,
                  String source)
          throws PulsarAdminException
  

  Parameter

  Name	Description
  tenant	Tenant name
  namespace	Namespace name
  source	Source name

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see stopSource.

• Stop a specified source connector.

  
  void stopSource(String tenant,
                  String namespace,
                  String source,
                  int instanceId)
           throws PulsarAdminException
  

  Parameter

  Name	Description
  tenant	Tenant name
  namespace	Namespace name
  source	Source name
  instanceId	Source instanceID

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see stopSource.

Sink

Stop a sink connector.

Admin CLI

Use the stop subcommand.

$ pulsar-admin sinks stop options

For more information, see here.

REST API

• Stop all sink connectors.

  Send a POST request to this endpoint: POST /admin/v3/sinks/:tenant/:namespace/:sinkName/stop/stopSink

• Stop a specified sink connector.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sinkeName/:instanceId/stop/stopSink

Java Admin API

• Stop all sink connectors.

  
  void stopSink(String tenant,
              String namespace,
              String sink)
      throws PulsarAdminException
  

  Parameter

  Name	Description
  tenant	Tenant name
  namespace	Namespace name
  source	Source name

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see stopSink.

• Stop a specified sink connector.

  
  void stopSink(String tenant,
                String namespace,
                String sink,
                int instanceId)
         throws PulsarAdminException
  

  Parameter

  Name	Description
  tenant	Tenant name
  namespace	Namespace name
  source	Source name
  instanceId	Source instanceID

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see stopSink.

Restart a connector

restart

You can restart a connector using Admin CLI, REST API or JAVA admin API.

Source

Restart a source connector.

Admin CLI

Use the restart subcommand.

$ pulsar-admin sources restart options

For more information, see here.

REST API

• Restart all source connectors.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sourceName/restart/restartSource

• Restart a specified source connector.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sourceName/:instanceId/restart/restartSource

Java Admin API

• Restart all source connectors.

  
  void restartSource(String tenant,
                     String namespace,
                     String source)
              throws PulsarAdminException
  

  Parameter

  Name	Description
  tenant	Tenant name
  namespace	Namespace name
  source	Source name

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see restartSource.

• Restart a specified source connector.

  
  void restartSource(String tenant,
                     String namespace,
                     String source,
                     int instanceId)
              throws PulsarAdminException
  

  Parameter

  Name	Description
  tenant	Tenant name
  namespace	Namespace name
  source	Source name
  instanceId	Source instanceID

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see restartSource.

Sink

Restart a sink connector.

Admin CLI

Use the restart subcommand.

$ pulsar-admin sinks restart options

For more information, see here.

REST API

• Restart all sink connectors.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sinkName/restart/restartSource

• Restart a specified sink connector.

  Send a POST request to this endpoint: POST /admin/v3/sources/:tenant/:namespace/:sinkName/:instanceId/restart/restartSource

Java Admin API

• Restart all Pulsar sink connectors.

  
  void restartSink(String tenant,
                   String namespace,
                   String sink)
            throws PulsarAdminException
  

  Parameter

  Name	Description
  tenant	Tenant name
  namespace	Namespace name
  sink	Sink name

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see restartSink.

• Restart a specified sink connector.

  
  void restartSink(String tenant,
                   String namespace,
                   String sink,
                   int instanceId)
            throws PulsarAdminException
  

  Parameter

  Name	Description
  tenant	Tenant name
  namespace	Namespace name
  source	Source name
  instanceId	Sink instanceID

  Exception

  Name	Description
  PulsarAdminException	Unexpected error

  For more information, see restartSink.

Delete a connector

delete

You can delete a connector using Admin CLI, REST API or JAVA admin API.

Source

Delete a source connector.

Admin CLI

Use the delete subcommand.

$ pulsar-admin sources delete options

For more information, see here.

REST API

Delete al Pulsar source connector.

Send a DELETE request to this endpoint: DELETE /admin/v3/sources/:tenant/:namespace/:sourceName/deregisterSource

Java Admin API

Delete a source connector.

void deleteSource(String tenant,
                  String namespace,
                  String source)
           throws PulsarAdminException

Parameter

Name	Description
tenant	Tenant name
namespace	Namespace name
source	Source name

Exception

Name	Description
PulsarAdminException.NotAuthorizedException	You don't have the admin permission
PulsarAdminException.NotFoundException	Cluster doesn't exist
PulsarAdminException.PreconditionFailedException	Cluster is not empty
PulsarAdminException	Unexpected error

For more information, see deleteSource.

Sink

Delete a sink connector.

Admin CLI

Use the delete subcommand.

$ pulsar-admin sinks delete options

For more information, see here.

REST API

Delete a sink connector.

Send a DELETE request to this endpoint: DELETE /admin/v3/sinks/:tenant/:namespace/:sinkName/deregisterSink

Java Admin API

Delete a Pulsar sink connector.

void deleteSink(String tenant,
                String namespace,
                String source)
         throws PulsarAdminException

Parameter

Name	Description
tenant	Tenant name
namespace	Namespace name
sink	Sink name

Exception

Name	Description
PulsarAdminException.NotAuthorizedException	You don't have the admin permission
PulsarAdminException.NotFoundException	Cluster doesn't exist
PulsarAdminException.PreconditionFailedException	Cluster is not empty
PulsarAdminException	Unexpected error

For more information, see deleteSource.