tika を Homebrew, Nix, apt でインストール

プロジェクトリンク

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コマンドとエイリアス

• tika
• tika-rest-server

プロジェクトの歴史

Tika emerged from the Apache Lucene ecosystem and became its own Apache top-level project in April 2010. The official site records Tika 0.8 in November 2010 as its first release as a TLP and Tika 1.0 in November 2011, just in time for ApacheCon NA 2011.

The project evolved from a library for content detection and text extraction into a large document-processing platform. Official getting-started documentation describes core modules, standard parser packages, a runnable tika-app jar with GUI and command-line interface, a JAX-RS REST server, OSGi bundles, and tika-eval tooling.

The release history shows recurring expansion into new formats, parser integrations, server features, OCR, language detection, metadata handling, and security hardening. Examples include Tika 1.15 adding tika-eval and configurable encoding detectors, Tika 2.x refactoring parser modules and pipes, and Tika 3.x requiring newer Java while continuing parser and server development.

The current official roadmap has moved the ecosystem forward again: the README states Tika 2.x and Java 8 support reached end of life in April 2025, while the download page lists Apache Tika 3.3.1 as the stable release and a 4.0.0 alpha line as a preview.

採用の歴史

Tika's adoption is tied to search, archives, digital forensics, records management, and large-scale document ingestion. The official site notes a 2010 ApacheCon talk on Tika use at NASA and in other Apache ecosystem projects, and it later records Apache Tika and Apache Solr as key technologies in analysis around the Panama Papers.

In package-manager terms, Tika is unusual because it is fundamentally a Java ecosystem project but is often installed as a command-line application or server. Homebrew's tika and tika-rest-server executables give shell users access to the same parsing engine without writing Java code.

Maven Central remains the natural adoption channel for Java applications, while package managers and runnable jars serve analysts, data engineers, and sysadmins who want document text extraction in scripts, ETL jobs, search indexing, or local experiments.

使われ方

The getting-started guide documents tika-app as a command-line utility for extracting text content and metadata from many file types, with flags for text, XHTML/XML, HTML, metadata JSON, recursive JSON, language detection, type detection, digest calculation, and embedded attachment extraction.

Tika is commonly used as a library when an application needs MIME detection or parser abstractions, as a standalone CLI when a user needs text or metadata on stdout, and as tika-server when teams want parsing over HTTP.

For package nerds, the tool is a dependable document-to-text bridge: install it, point it at PDFs, Office documents, archives, images, or email-like formats, and feed the extracted content into grep, search indexes, data pipelines, or audit tools.

パッケージ好きにとっての重要性

Apache Tika is significant because it hides a large, fragile matrix of document formats and parser dependencies behind a stable package name. A small formula or package installs access to PDFBox, POI, media-type detection, metadata models, server endpoints, and many third-party parsers that would be fiddly to assemble by hand.

Its release notes are watched by maintainers because file parsers are security-sensitive and dependency-heavy. Package versions matter for Java requirements, parser behavior, CVEs, output format defaults, and whether users are on the 1.x, 2.x, 3.x, or preview 4.x line.

Tika is also a classic example of an enterprise Java tool that escaped into CLI culture: even users who never import org.apache.tika can use the packaged executable as a universal text extractor in shell workflows.

タイムライン

• 2009: Official site lists early 0.3, 0.4, and 0.5 releases.
• April 2010: Apache Tika graduates to top-level project status.
• November 2010: Tika 0.8 becomes the first release as a TLP.
• November 2011: Tika 1.0 released.
• July 2021: Tika 2.0.0 released.
• September 2022: Tika 1.x branch reaches end of life.
• October 2024: Tika 3.0.0 released, with the 3.x branch requiring Java 11.
• April 2025: Tika 2.x and Java 8 support reach end of life.
• 2026: Tika 3.3.x stable releases and 4.0.0 alpha preview releases are documented on the official site.

Related projects

• The official site places early Tika in the Lucene and Apache ecosystem and documents notable use with Apache Solr.
• Official documentation names parser and build dependencies across the Java ecosystem, including Maven, Jetty for tika-server, and parser libraries used by the standard parser package.

ソース

• https://github.com/apache/tika#readme - official README for project description, Java baseline, command-line quick start, Maven usage, and current branch notes.
• https://tika.apache.org/ - official homepage/news for TLP graduation, 0.x/1.x/2.x/3.x release history, NASA and Panama Papers notes, and EOL notices.
• https://tika.apache.org/3.3.0/gettingstarted.html - official getting-started guide for build artifacts, tika-app, tika-server, Maven dependencies, and CLI options.
• https://tika.apache.org/download.html - official download page for current stable and preview release packaging.