Predicate Filter Action

Provided by: "Apache Software Foundation"

Support Level for this Kamelet is: "Stable"

Filter based on a JSONPath Expression. Since this is a filter, the expression is a negation. This means that if the foo field of the example is equal to John, the message goes ahead. Otherwise it is filtered out.

Configuration Options

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

Property Name Description Type Default Example

Property	Name	Description	Type	Default	Example
expression	Expression	Required The JSONPath Expression to evaluate, without the external parenthesis. Since this is a filter, the expression is a negation. This means that if the `foo` field of the example is equal to `John`, the message goes ahead. Otherwise it is filtered out.	string		@.foo =~ /.*John/

expression

Expression

Required The JSONPath Expression to evaluate, without the external parenthesis. Since this is a filter, the expression is a negation. This means that if the foo field of the example is equal to John, the message goes ahead. Otherwise it is filtered out.

string

@.foo =~ /.*John/

Dependencies

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

camel:core
camel:kamelet
camel:jsonpath

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:timer-source"
      parameters:
        period: 10000
        message: 'test'
      steps:
        - to:
            uri: "kamelet:predicate-filter-action"
            parameters:
            .
            .
            .
        - 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/predicate-filter-action.kamelet.yaml