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Chapter 78. Timer Source

Produces periodic messages with a custom payload.

78.1. Configuration Options
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The following table summarizes the configuration options available for the timer-source Kamelet:

Expand
PropertyNameDescriptionTypeDefaultExample

message *

Message

The message to generate.

string

 

hello world

contentType

Content Type

The content type of the generated message.

string

text/plain

 

period

Period

The interval (in milliseconds) to wait between producing the next message.

integer

1000

 

repeatCount

Repeat Count

Specifies a maximum limit of number of fires

integer

  

* = Fields marked with an asterisk are mandatory.

78.2. Dependencies
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78.2.1. Quarkus dependencies
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<dependencies>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifact>camel-quarkus-core</artifact>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifact>camel-quarkus-kamelet</artifact>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifact>camel-quarkus-timer</artifact>
  </dependency>
  <dependency>
    <groupId>org.apache.camel.kamelets</groupId>
    <artifact>camel-kamelets-utils</artifact>
    <version>4.8.5</version>
  </dependency>
</dependencies>
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78.3. Usage
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78.3.1. Camel JBang usage
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78.3.1.1. Prerequisites for JBang
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  • Install JBang.

  • You have executed the following command: 

    jbang app install camel@apache/camel
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78.3.1.2. Running a route with JBang
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Suppose you have a file named route.yaml with this content: 

- route:
    from:
      uri: "kamelet:timer-source"
      parameters:
        period: 10000
        message: 'test'
      steps:
        - to:
            uri: "kamelet:log-sink"
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You can now run it directly through the following command. 

camel run route.yaml
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78.3.2. Knative Source
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You can use the timer-source Kamelet as a Knative source by binding it to a Knative object.

timer-source-binding.yaml

apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: timer-source-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1
      name: timer-source
    properties:
      message: "hello world"
  sink:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
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78.3.3. Kafka Source
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You can use the timer-source Kamelet as a Kafka source by binding it to a Kafka topic.

timer-source-binding.yaml

apiVersion: camel.apache.org/v1
kind: Pipe
metadata:
  name: timer-source-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1
      name: timer-source
    properties:
      message: "hello world"
  sink:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic
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78.4. Kamelets source file
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https://github.com/jboss-fuse/camel-kamelets/blob/camel-kamelets-4.10.3-branch/kamelets/timer-source.kamelet.yaml

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