November 16, 2023SHOWCASE · LLM
App template:

GCP Logo Deploy with GCP | Render Logo Deploy with Render

Real-time alerting based on local documents: End-to-end template

This example implements a pipeline that answers questions based on documents in a given folder. Additionally, in your prompts you can ask to be notified of any changes - in such case an alert will be sent to a Slack channel.

Upon starting, a REST API endpoint is opened by the app to serve queries about files inside the input folder data_dir.

We can create notifications by sending a query to API and stating we want to be notified of the changes. One example would be Tell me and alert about the start date of the campaign for Magic Cola

What happens next?

Each query text is first turned into a vector using OpenAI embedding service, then relevant documentation pages are found using a Nearest Neighbor index computed for documents in the corpus. A prompt is built from the relevant documentations pages and sent to the OpenAI GPT3.5 chat service for processing and answering.

Once you run, Pathway looks for any changes in data sources and efficiently detects changes to the relevant documents. When a change is detected, the LLM is asked to answer the query again, and if the new answer is sufficiently different, an alert is created.

How to run the project

Setup Slack notifications:

For this demo, Slack notifications are optional and notifications will be printed if no Slack API keys are provided. See: Slack Apps and Getting a token. Your Slack application will need at least chat:write.public scope enabled.

Setup environment:

Set your env variables in the .env file placed in this directory.

PATHWAY_DATA_DIR= # If unset, defaults to ./data/live/. If running with Docker, when you change this variable you may need to change the volume mount.
PATHWAY_PERSISTENT_STORAGE= # Set this variable if you want to use caching

Run with Docker

To run jointly the Alert pipeline and a simple UI execute:

docker compose up --build

Then, the UI will run at by default. You can access it by following this URL in your web browser.

The docker-compose.yml file declares a volume bind mount that makes changes to files under data/ made on your host computer visible inside the docker container. The files in data/live are indexed by the pipeline - you can paste new files there and they will impact the computations.

Run manually

Alternatively, you can run each service separately.

Make sure you have installed poetry dependencies.

poetry install --with examples

Then run:

poetry run python

If all dependencies are managed manually rather than using poetry, you can alternatively use:


To run the Streamlit UI, run:

streamlit run ui/ --server.port 8501 --server.address

Querying the pipeline

To create alerts, you can call the REST API:

curl --data '{
  "user": "user",
  "query": "When does the magic cola campaign start? Alert me if the start date changes."
}' http://localhost:8080/ | jq

or access the Streamlit UI at