pulsar source Pulsar Source

Provided by: "Apache Software Foundation"

Support Level for this Kamelet is: "Stable"

Receive data from Pulsar topics.

Configuration Options

The following table summarizes the configuration options available for the pulsar-source Kamelet:

Property Name Description Type Default Example

namespaceName

Pulsar Namespace Name

Required The Pulsar Namespace Name.

string

serviceUrl

Service URL

Required The Pulsar Service URL to point while creating the client from URI.

string

tenant

Tenant Name

Required The Tenant Name.

string

topic

Topic Name

Required The topic name or regexp.

string

topicType

Topic Type

Required The topic type. Possible values are: persistent or non-persistent.

string

authenticationClass

Authentication Class

The Authentication FQCN to be used while creating the client from URI.

string

authenticationParams

Authentication Params

The Authentication Parameters to be used while creating the client from URI.

string

consumerNamePrefix

Consumer Name Prefix

Prefix to add to consumer names when a SHARED or FAILOVER subscription is used.

string

cons

consumerQueueSize

Consumer Queue Size

Size of the consumer queue.

integer

10

deadLetterTopic

Dead Letter Topic

Name of the topic where the messages which fail maxRedeliverCount times will be sent. Note: if not set, default topic name will be topicName-subscriptionName-DLQ.

integer

maxRedeliverCount

Maximum Redelivery Count

Maximum number of times that a message will be redelivered before being sent to the dead letter queue. If this value is not set, no Dead Letter Policy will be created.

integer

messageListener

Message Listener

Whether to use the messageListener interface, or to receive messages using a separate thread pool.

boolean

true

negativeAckRedeliveryDelayMicros

Negative Ack Redelivery Delay in Microseconds

Set the negative acknowledgement delay.

integer

60000000

numberOfConsumerThreads

Number Of Consumer Threads

Number of threads to receive and handle messages when using a separate thread pool.

integer

1

numberOfConsumers

Number Of Consumers

Number of consumers.

integer

1

readCompacted

Read Compacted

Enable compacted topic reading.

boolean

false

subscriptionInitialPosition

Subscription Initial Position

Control the initial position in the topic of a newly created subscription. Default is latest message.Possible values: EARLIEST or LATEST.

string

LATEST

subscriptionName

Subscription Name

Name of the subscription to use.

string

subs

subscriptionTopicsMode

Subscription Topics Mode

Determines to which topics this consumer should be subscribed to - Persistent, Non-Persistent, or both. Only used with pattern subscriptions.Possible values: PersistentOnly, NonPersistentOnly, AllTopics.

string

PersistentOnly

subscriptionType

Subscription Type

Type of the subscription. Possible values: EXCLUSIVE, SHARED, FAILOVER, KEY_SHARED.

string

EXCLUSIVE

topicsPattern

Topic Pattern

Whether the topic is a pattern (regular expression) that allows the consumer to subscribe to all matching topics in the namespace.

boolean

false

Dependencies

At runtime, the pulsar-source Kamelet relies upon the presence of the following dependencies:

  • camel:pulsar

  • camel:kamelet

  • camel:core

Usage

This section describes how you can use the pulsar-source.

Knative source

You can use the pulsar-source Kamelet as a Knative source by binding it to a Knative object.

pulsar-source-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: pulsar-source-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: pulsar-source
    properties:
      namespaceName: The Pulsar Namespace Name
      serviceUrl: The Service URL
      tenant: The Tenant Name
      topic: The Topic Name
      topicType: The Topic Type
  sink:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel

Prerequisite

You have Camel K installed on the cluster.

Procedure for using the cluster CLI

  1. Save the pulsar-source-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the source by using the following command:

    kubectl apply -f pulsar-source-binding.yaml

Procedure for using the Kamel CLI

Configure and run the source by using the following command:

kamel bind pulsar-source -p "source.namespaceName=The Pulsar Namespace Name" -p "source.serviceUrl=The Service URL" -p "source.tenant=The Tenant Name" -p "source.topic=The Topic Name" -p "source.topicType=The Topic Type" channel:mychannel

This command creates the KameletBinding in the current namespace on the cluster.

Kafka source

You can use the pulsar-source Kamelet as a Kafka source by binding it to a Kafka topic.

pulsar-source-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: pulsar-source-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: pulsar-source
    properties:
      namespaceName: The Pulsar Namespace Name
      serviceUrl: The Service URL
      tenant: The Tenant Name
      topic: The Topic Name
      topicType: The Topic Type
  sink:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic

Prerequisites

  • You’ve installed Strimzi.

  • You’ve created a topic named my-topic in the current namespace.

  • You have Camel K installed on the cluster.

Procedure for using the cluster CLI

  1. Save the pulsar-source-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the source by using the following command:

    kubectl apply -f pulsar-source-binding.yaml

Procedure for using the Kamel CLI

Configure and run the source by using the following command:

kamel bind pulsar-source -p "source.namespaceName=The Pulsar Namespace Name" -p "source.serviceUrl=The Service URL" -p "source.tenant=The Tenant Name" -p "source.topic=The Topic Name" -p "source.topicType=The Topic Type" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic

This command creates the KameletBinding in the current namespace on the cluster.