Cloud-Native Neural Search^? Framework for Any Kind of Data

Jina is a neural search framework that empowers anyone to build SOTA and scalable deep learning search applications in minutes.

🌌 All data types - Scalable indexing, querying, understanding of any data: video, image, long/short text, music, source code, PDF, etc.

⏱️ Save time - The design pattern of neural search systems, from zero to a production-ready system in minutes.

🌩️ Fast & cloud-native - Distributed architecture from day one, scalable & cloud-native by design: enjoy containerization, streaming, sharding, replication, async scheduling, HTTP/gRPC/WebSocket protocols.

🍱 Own your stack - Keep end-to-end stack ownership of your solution, avoid integration pitfalls you get with fragmented, multi-vendor, generic legacy tools.

• via PyPI: pip install jina
• via Conda: conda install jina -c conda-forge
• via Docker: docker run jinaai/jina:latest
• More install options

• 👗 Fashion image search: jina hello fashion
• 🤖 QA chatbot: pip install "jina[demo]" && jina hello chatbot
• 📰 Multimodal search: pip install "jina[demo]" && jina hello multimodal
• 🍴 Fork the source of a demo to your folder: jina hello fork fashion ../my-proj/

Document, Executor, and Flow are three fundamental concepts in Jina.

• 📄 Document is the basic data type in Jina;
• ⚙️ Executor is how Jina processes Documents;
• 🔀 Flow is how Jina streamlines and distributes Executors.

Leveraging these three components, let's build an app that find lines from a code snippet that are most similar to the query.

^{💡 Preliminaries: character embedding , pooling , Euclidean distance 📗 Read our docs for details}

1️⃣ Copy-paste the minimum example below and run it:

import numpy as np
from jina import Document, DocumentArray, Executor, Flow, requests


class CharEmbed(Executor):  # a simple character embedding with mean-pooling
    offset = 32  # letter `a`
    dim = 127 - offset + 1  # last pos reserved for `UNK`
    char_embd = np.eye(dim) * 1  # one-hot embedding for all chars

    @requests
    def foo(self, docs: DocumentArray, **kwargs):
        for d in docs:
            r_emb = [ord(c) - self.offset if self.offset <= ord(c) <= 127 else (self.dim - 1) for c in d.text]
            d.embedding = self.char_embd[r_emb, :].mean(axis=0)  # average pooling


class Indexer(Executor):
    _docs = DocumentArray()  # for storing all documents in memory

    @requests(on='/index')
    def foo(self, docs: DocumentArray, **kwargs):
        self._docs.extend(docs)  # extend stored `docs`

    @requests(on='/search')
    def bar(self, docs: DocumentArray, **kwargs):
        docs.match(self._docs, metric='euclidean')


f = Flow(port_expose=12345, protocol='http', cors=True).add(uses=CharEmbed, replicas=2).add(
    uses=Indexer)  # build a Flow, with 2 replica CharEmbed, tho unnecessary
with f:
    f.post('/index', (Document(text=t.strip()) for t in open(__file__) if t.strip()))  # index all lines of _this_ file
    f.block()  # block for listening request

2️⃣ Open http://localhost:12345/docs (an extended Swagger UI) in your browser, click /search tab and input:

{
  "data": [
    {
      "text": "@requests(on=something)"
    }
  ]
}

That means, we want to find lines from the above code snippet that are most similar to @request(on=something). Now click Execute button!

3️⃣ Not a GUI fan? Let's do it in Python then! Keep the above server running and start a simple client:

from jina import Client, Document
from jina.types.request import Response


def print_matches(resp: Response):  # the callback function invoked when task is done
    for idx, d in enumerate(resp.docs[0].matches[:3]):  # print top-3 matches
        print(f'[{idx}]{d.scores["euclidean"].value:2f}: "{d.text}"')


c = Client(protocol='http', port=12345)  # connect to localhost:12345
c.post('/search', Document(text='request(on=something)'), on_done=print_matches)

This prints the following results:

         Client@1608[S]:connected to the gateway at localhost:12345!
[0]0.168526: "@requests(on='/index')"
[1]0.181676: "@requests(on='/search')"
[2]0.218218: "from jina import Document, DocumentArray, Executor, Flow, requests"

^{😔 Doesn't work? Our bad! Please report it here.}

• Join our Slack community to chat to our engineers about your use cases, questions, and support queries.
• Join our Engineering All Hands meet-up to discuss your use case and learn Jina's new features.
  • When? The second Tuesday of every month
  • Where? Zoom (see our public calendar/.ical/Meetup group) and live stream on YouTube
• Subscribe to the latest video tutorials on our YouTube channel

Jina is backed by Jina AI and licensed under Apache-2.0. We are actively hiring AI engineers, solution engineers to build the next neural search ecosystem in open source.

We welcome all kinds of contributions from the open-source community, individuals and partners. We owe our success to your active involvement.

• Release cycles and development stages
• Contributing guidelines
• Code of conduct