pysolrmarc

A Python wrapper for Solrmarc that converts binary MARC records into Solr documents by communicating with the Solrmarc Java process via stdin/stdout (NDJSON).

Installation

pip install pysolrmarc

Prerequisites

• Java 8+ must be installed and available on PATH.
• A Solrmarc installation directory (default: /opt/solrmarc) containing:
  • solrmarc/solrmarc_core_ant.jar
  • solrmarc/lib/ (Java dependencies)
  • solrmarc/lib_solrj/ and solrmarc/lib_local/
  • solrmarc/log4j.properties
  • A mapping properties file (e.g. index.kxp.tit.properties)
  • A reader options file (e.g. marcreader.properties)

Quick Start

import pysolrmarc

with pysolrmarc.Solrmarc(
    mapping="/opt/solrmarc/mappings/ahn/index.kxp.tit.properties",
    reader_opts="/opt/solrmarc/mappings/ahn/marcreader.properties",
) as sm:
    solr_doc = sm.convert(binary_marc_record)
    print(solr_doc)

The context manager ensures the Java process is terminated gracefully when done. You can also use it without with and call close() manually:

sm = pysolrmarc.Solrmarc(
    mapping="/opt/solrmarc/mappings/ahn/index.kxp.tit.properties",
    reader_opts="/opt/solrmarc/mappings/ahn/marcreader.properties",
    path="/opt/solrmarc",
)
try:
    solr_doc = sm.convert(binary_marc_record)
finally:
    sm.close()

API Reference

Solrmarc(mapping, reader_opts, path="/opt/solrmarc")

Creates a new Solrmarc instance and starts the Java process.

Supports the context manager protocol (with statement).

convert(marc, retries=2) -> dict | None

Converts a single binary MARC record to a Solr document dict.

Returns a dict representing the Solr document, or None if Solrmarc returned an empty response.

Raises an Exception if JSON decoding fails or all retries are exhausted.

start() -> None

Starts the Solrmarc Java process. Called automatically on __init__. Use to restart after calling stop().

stop() -> None

Kills the Solrmarc process forcefully (sends SIGKILL).

restart() -> None

Stops and restarts the Solrmarc instance.

close() -> None

Terminates the Solrmarc process gracefully (sends SIGTERM). Called automatically when exiting a with block.

Build and Publish

pip install hatch
hatch build
uv publish dist/*

To publish to a private registry:

uv publish --publish-url https://git.slub-dresden.de/api/v4/projects/2300/packages/pypi dist/*

License

MIT – see LICENSE.