S3 Events Handler

S3 events handler for use in VRT v2 flow.

Synopsis

The S3 events handler is a service that handles incoming s3 events of type ObjectCreated and ObjectRemoved.

Object Created

This will generate a sidecar for an incoming essence. The generated XML gets put onto the MediaHaven transport server and a message gets published so that the essence gets moved to the transport server.

The object-created flow:

• Parse incoming S3 message
• Check if item is not already in MediaHaven
• Get PID from the PID webservice
• Generate MediaHaven sidecar XML
• FTP sidecar to MediaHaven transport server
• Publish message to move the file from S3 to the transport server

Object Removed

This will remove the essence and all of its collaterals in MediaHaven.

The object-removed flow:

• Query the essence from MediaHaven with the s3_object_key and s3_bucket
• Collect all the local_ids of the fragments of the returned essence
• Query the collaterals from MediaHaven based on those local_ids
• Remove the collaterals
• Remove the essence

Prerequisites

• Git
• Docker (optional)
• Python 3.6+
• Access to the meemoo PyPi

Usage

1. Clone this repository with:

   $ git clone https://github.com/viaacode/s3-events-handler.git

2. Change into the new directory.

3. Set the needed config:

   Included in this repository is a config.yml file detailing the required configuration. There is also an .env.example file containing all the needed env variables used in the config.yml file. All values in the config have to be set in order for the application to function correctly. You can use !ENV ${EXAMPLE} as a config value to make the application get the EXAMPLE environment variable.

Running locally

Note: As per the aforementioned requirements, this is a Python3 application. Check your Python version with python --version. You may want to substitute the python command below with python3 if your default Python version is < 3. In that case, you probably also want to use pip3 command.

1. Start by creating a virtual environment:

   $ python -m venv env

2. Activate the virtual environment:

   $ source env/bin/activate

3. Install the external modules:

   $ pip install -r requirements.txt \
       --extra-index-url http://do-prd-mvn-01.do.viaa.be:8081/repository/pypi-all/simple \
       --trusted-host do-prd-mvn-01.do.viaa.be
   

4. Run the tests with:

   $ pytest -v --cov=./meemoo --cov=main

5. Run the application:

   $ python main.py

Running using Docker

1. Build the container:

   $ docker build -t s3-events-handler .

2. Run the container (with specified .env file):

   $ docker run --env-file .env --rm s3-events-handler:latest