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Chapter 68. Throttle Action

The Throttle action allows you to ensure that a specific sink does not get overloaded.

68.1. Configuration Options
링크 복사

The following table summarizes the configuration options available for the throttle-action Kamelet:

Expand
PropertyNameDescriptionTypeDefaultExample

messages *

Messages Number

The number of messages to send in the time period set

integer

 

10

timePeriod

Time Period

Sets the time period during which the maximum request count is valid for, in milliseconds

string

"1000"

 
Note

Fields marked with an asterisk (*) are mandatory.

68.2. Dependencies
링크 복사

At runtime, the throttle-action Kamelet relies upon the presence of the following dependencies:

  • camel:core
  • camel:kamelet

68.3. Usage
링크 복사

This section describes how you can use the throttle-action.

68.3.1. Knative Action
링크 복사

You can use the throttle-action Kamelet as an intermediate step in a Knative binding.

throttle-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: throttle-action-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: timer-source
    properties:
      message: "Hello"
  steps:
  - ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: throttle-action
    properties:
      messages: 1
  sink:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
Copy to Clipboard Toggle word wrap

68.3.1.1. Prerequisite
링크 복사

Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.

68.3.1.2. Procedure for using the cluster CLI
링크 복사

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

  2. Run the action by using the following command: 

    oc apply -f throttle-action-binding.yaml
    Copy to Clipboard Toggle word wrap

68.3.1.3. Procedure for using the Kamel CLI
링크 복사

Configure and run the action by using the following command: 

kamel bind timer-source?message=Hello --step throttle-action -p "step-0.messages=10" channel:mychannel
Copy to Clipboard Toggle word wrap

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

68.3.2. Kafka Action
링크 복사

You can use the throttle-action Kamelet as an intermediate step in a Kafka binding.

throttle-action-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: throttle-action-binding
spec:
  source:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: timer-source
    properties:
      message: "Hello"
  steps:
  - ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: throttle-action
    properties:
      messages: 1
  sink:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic
Copy to Clipboard Toggle word wrap

68.3.2.1. Prerequisites
링크 복사

Ensure that you’ve installed the AMQ Streams operator in your OpenShift cluster and created a topic named my-topic in the current namespace. Make also sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.

68.3.2.2. Procedure for using the cluster CLI
링크 복사

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

  2. Run the action by using the following command: 

    oc apply -f throttle-action-binding.yaml
    Copy to Clipboard Toggle word wrap

68.3.2.3. Procedure for using the Kamel CLI
링크 복사

Configure and run the action by using the following command: 

kamel bind timer-source?message=Hello --step throttle-action -p "step-0.messages=1" kafka.strimzi.io/v1beta1:KafkaTopic:my-topic
Copy to Clipboard Toggle word wrap

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

68.4. Kamelet source file
링크 복사

https://github.com/openshift-integration/kamelet-catalog/throttle-action.kamelet.yaml

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