saturnin 0.8.0

Firebird Butler platform for Python

Saturnin is an implementation of Firebird Butler platform for Python.

Important

For best experience with Saturnin console and other tools, we recommend to use terminal with good support for ANSI escape sequences. On Windows platform, we recommend to use Windows Terminal.

Installation

You will need Python v3.8 or later to install Saturnin.

For regular deployments, we recommend installing using the pipx tool, which installs into a separate virtual Python environment and exposes all executable commands in the search path.

> pip install pipx
> pipx install saturnin

If you want to develop your own services using the Saturnin SDK, we recommend that you first create a separate virtual environment into which you install Saturnin in the usual way with the pip tool.

Initialization

Saturnin uses a number of files and directories whose location in the file system corresponds to the standards for the platform on which it is installed. This basic directory placement scheme can be changed by using the SATURNIN_HOME environment variable, which sets the root of the other directory locations. Alternatively, you can create a “home” subdirectory in the root directory of the virtual environment in which Saturnin is isolated.

Important

Because on Linux or MacOS the default location of some directories may require higher than normal access rights, we recommend that you always use the home directory setting on these platforms.

Tip

To set the home directory in the virtual environment (recommended when installing with pipx), use the command:

> saturnin create home

The next step is to initialize the Saturnin installation with the command:

> saturnin initialize

Saturnin console

The saturnin tool is used to manage the Saturnin platform installation. It can be operated in two modes:

• Single command (direct) mode. The required command and parameters are entered directly on the command line, and after the command is executed, the tool is terminated.

• Interactive console mode activated by running the tool without additional parameters. The interactive console offers an enhanced command line with persistent command history, command and parameter completion, and interactive help.

Note

The command set available in console mode differs from command set available in direct mode, as some commands (typically those required to run only once or not very often like initialize or create home) are available only in direct mode.

For normal work, we recommend using the interactive console mode. In the following sections, all the commands described are entered in the interactive console.

Installing services

Immediately after installation, Saturnin does not provide any Butler services. These services need to be installed separately. Although you can install service packages with the standard pip utility, we recommend that you use saturnin’s install package, uninstall package, and pip commands to install, uninstall, or manage service packages, as these commands also update the necessary registries that Saturnin uses to work with Butler services and Saturnin applications.

Note

If necessary, the command: update registry can be used to update the registries.

To install package with Saturnin core services, use command:

> install package saturnin-core

Using Firebird services

To use Butler services that work with Firebird server, you need to create (and update) a configuration file for the firebird driver using the commands:

> create config firebird
> edit config firebird

Saturnin recipes

Recipes are Saturnin-specific configuration files with instructions for running Butler services built for Saturnin. Recipes can be created with the create recipe command, which creates a recipe template that typically needs to be modified further (because it only contains default values). Recipes created independently (e.g. by a solution supplier or provided by installed Saturnin application) must be installed with the install recipe command.

Created or installed recipes can be run with the run recipe-name command. You can get a list of recipes that can be started with the list recipes command.

For more information, see the Usage Guide.