Atalanta

In Greek mythology, a renowned and swift-footed huntress

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A Rust application for generating transaction matching data for performance testing Harmonia.

Jira ticket: https://hellobink.atlassian.net/browse/MER-2081

Two main components, bins, for creating transaction data and uploading transactions to various locations.

src/bin/transactor.rs - Creates a raw transaction and pushed onto queues. Consumers pickup the transaction data and push them to relevant locations.

src/bin/distributor.rs - Collects the transaction data off the queues (consumers) for onward upload to various locations like API endpoints, SFTP, blob storage etc.

To run the project locally run the following commands within the root of the atlanta directory:

cargo run --bin distributor

cargo run --bin transactor

Example code is provided in the examples directory, which can be run as follows:

cargo run --example hello

cargo run --example consumer

Unit tests are executed as follows:

cargo test -- --nocapture

For better output, you can install cargo-nextest and use cargo nextest run.

Note: --nocapture allows print statements to print during the test, if not provided print statements are not displayed.

Add packages using:

cargo add <<package name>>

MID's are selected at random from a subset of relevant retailer MID's which are extracted from the perf_mids.csv file in the files directory. To create the perf_mids.csv use the following psql query, don't forget to port forward to the postgres database:

psql $(kubectl get secret azure-pgfs -o json | jq -r .data.common_harmonia | base64 --decode | sed 's/bink-uksouth-.*.postgres.database.azure.com/127.0.0.1/g') -t -A -F"," -c "select LS.slug, PP.slug, MI.identifier, MI.identifier_type, MI.location_id, MI.merchant_internal_id from merchant_identifier MI, payment_provider PP, loyalty_scheme LS where MI.payment_provider_id = PP.id AND MI.loyalty_scheme_id = LS.id ORDER BY LS.slug;" > perf_mids.csv

SSH/SFTP (Important!)

In order to send files over SFTP, the correct key must be added to the SSH agent. This can be done manually with ssh-add:

$ ssh-add ~/.ssh/id_sftp_example_rsa
Identity added: ~/.ssh/id_sftp_dev (user@example)

Check added keys with ssh-add -l

$ ssh-add -l
4096 SHA256:6atU6QqYFo/yM3z7fdALL2tVzMePJ/3bNhNEx9vw94g user@example (RSA)

Hermes Database Generation

Important

This feature is a work-in-progress. It currently populates the following tables:

• public.user

Atalanta includes tools to help with creating a valid Hermes database to test against.

To get started, prepare a database to populate. Remember to change the environment variable(s) to match your local setup:

$ export HERMES_DATABASE_NAME=hermes_perf
$ export HERMES_DATABASE_URL=postgres://postgres@localhost/$HERMES_DATABASE_NAME
$ psql postgres://postgres@localhost -c "CREATE DATABASE $HERMES_DATABASE_NAME"

Next, use Hermes to set up the database schema:

$ git clone git@github.com:binkhq/hermes.git
$ cd hermes
$ poetry install
$ VAULT_URL="" poetry run python manage.py migrate

Now use Atalanta to populate the database:

$ cargo run --bin datapop | psql $HERMES_DATABASE_URL

At this stage the database is ready to use. If you wish to create a compressed dump for use in CI, you can do so with pg_dump and gzip:

$ pg_dump $HERMES_DATABASE_URL | gzip > hermes_perf.sql.gz