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.

Enum values:

* persistent * 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.

Enum values:

* EARLIEST * 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.

Enum values:

* PersistentOnly * NonPersistentOnly * AllTopics

string

PersistentOnly

subscriptionType

Subscription Type

Type of the subscription.

Enum 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

Camel JBang usage

Prerequisites

  • You’ve installed JBang.

  • You have executed the following command:

jbang app install camel@apache/camel

Supposing you have a file named route.yaml with this content:

- route:
    from:
      uri: "kamelet:pulsar-source"
      parameters:
        .
        .
        .
      steps:
        - to:
            uri: "kamelet:log-sink"

You can now run it directly through the following command

camel run route.yaml

Kamelet source file

https://github.com/apache/camel-kamelets/blob/main/kamelets/pulsar-source.kamelet.yaml

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