Kamelet Catalog

Tika Extract Text Action

Provided by: "Apache Software Foundation"

Support Level for this Kamelet is: "Preview"

Extract plain text from PDF, office and similar documents in-process with Apache Tika.

Before the parse, the value of the documentIdHeader header is captured into the CamelLangChain4jIngestDocumentId exchange property - Tika copies document metadata over the headers, so a crafted document could otherwise forge its own identity in steps that read it later (the langchain4j-ingest sink does). The extracted text is decoded at a pinned UTF-8 (a document-injected charset header is swept before the conversion), and after the parse all non-Camel headers are removed: past this action, parsed document metadata is indistinguishable from caller headers, so it must not travel further. Each format needs its Tika parser module on the classpath; camel-tika ships the HTML and text modules, PDF needs org.apache.tika:tika-parser-pdf-module.

Configuration Options

The following table summarizes the configuration options available for the tika-extract-text-action Kamelet:

Property	Name	Description	Type	Default	Example
documentIdHeader	Document Id Header	Name of the header carrying the stable document id, captured into the CamelLangChain4jIngestDocumentId exchange property before the parse.	string	CamelLangChain4jIngestDocumentId

Property

Name

Description

Type

Default

Example

documentIdHeader

Document Id Header

Name of the header carrying the stable document id, captured into the CamelLangChain4jIngestDocumentId exchange property before the parse.

string

CamelLangChain4jIngestDocumentId

Dependencies

At runtime, the tika-extract-text-action Kamelet relies upon the presence of the following dependencies:

camel:core
camel:tika
camel:kamelet

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:tika-extract-text-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/tika-extract-text-action.kamelet.yaml