Python DIH (Data Import Handler) — AI-Assisted Rewrite

This contrib module provides a Python implementation of Apache Solr's Data Import Handler (DIH), aligned to the original Java XML model (data-config.xml) and the original Java DIH behavior shipped in solr 8.6 contrib tree.

The project is an AI-assisted rewrite: implementation and parity work were driven by the rewrite plan and sourced from the original Java code under:

src/java/org/apache/solr/handler/dataimport/

Goals

• Drop-in replacement for DIH-style data-config.xml imports (same XML vocabulary, same ${...} variable model).
• Stay compatible with future Solr releases by evolving the Python runtime instead of being constrained by the original Java maintenance lifecycle.
• Add new capabilities where needed (for example: additional sinks and declarative cleanup flows).

Why Rewrite the Java DIH?

Apache Solr's DIH has moved toward maintenance, and the widely used community-maintained alternative (SearchScale/dataimporthandler) is oriented around keeping up rather than adding new functionality:

• SearchScale/dataimporthandler

This rewrite focuses on being a future-proof DIH runtime that continues to implement Solr DIH concepts while enabling new features over time.

Documentation

The documentation set is organized under docs/:

• docs/README.md (hub)
• docs/functionality-checklist.md (Java parity evidence + provenance)
• docs/parity-java.md (high-level parity + caveats)
• docs/new-features.md (Python rewrite additions)

License

This code is distributed under the Apache License 2.0.