alma.tar.gz-to-marcinjson

Turn alma marc-xml export files into nicer marc-in-json jsonl files

Alma exports marc-xml files as a bunch of <whatever>.tar.gz files, each of which has the single file <whatever>.xml in it.

This is code that creates a fat .jar (i.e., all dependencies included) that will take any number of <whatever>.tar.gz files and produce <whatever>.jsonl.gz files in the directory you invoked the program from.

Usage

This is an executable .jar file that only takes filenames to convert as arguments.

java -jar /path/to/alma.tar.gz-to-marcinxml /path/to/alma/*.tar.gz

Building the .jar file

mvn package assembly:single

Performance

It's not ridiculously fast (e.g., it doesn't use Jackson custom serializers like it should and isn't even multi-threaded), but it'll convert the University of Michigan's full export of some 14.5M records on my laptop in about 15mn.