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annoy-java

Build Status codecov.io Maven Central GitHub license

Java JNI wrapper around annoy (C++).

Adding to pom

<dependency>
    <groupId>com.spotify</groupId>
    <artifactId>annoy-java</artifactId>
    <version>0.4.1-SNAPSHOT</version>
</dependency>

Getting started

List<Float> v0 = Arrays.asList(0f, 1f, 2f);
List<Float> v1 = Arrays.asList(3f, 4f, 5f);
List<List<Float>> allVecs = Arrays.asList(v0, v1);

String filename = String.format("./dummy.annoy");

Annoy.newIndex(3)
    .addAllItems(allVecs)
    .build(2)
    .save(filename);

AnnoyIndex annoyIndex = Annoy.loadIndex(filename, 3);

annoyIndex.getNearestByItem(1, 42);

For more examples, take a look at the unit tests.

Run python vs. java benchmark

./src/test/python/benchmark_java_vs_python.py

TODO

  • Once tested in prod, move to spotify/annoy-java
  • Give a try to faiss

License

Copyright 2017 Spotify AB.

Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0

annoy-java's People

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