serverish - helpers for server alike projects

Features

• Component management
• Singletons
• Connections management and diagnostics
• NATS based Messenger
• Live documents - auto-updating configuration from NATS

See doc directory for more documentation.

Optional (extras) dependencies

The following extras are available:

• messenger - for using NATS based Messenger. Will install nats-py package.
• dns - for using aiodns DNS resolver for connection status diagnostics, it's extracted as an extra dependency because it's not available on all platforms.

In order to use Messenger, you have to add extra 'messenger' to your project.toml serveris dependency, e.g.:

serverish = {git="https://github.com/AkondLab/serverish.git", extras=["messenger"], branch="master"}

or specify dpendency with extras in the pip convention: serverish[messenger]. this will install nats-py package.

Plans

• Decorators @messenger.sub(subject) (Web framework style)
• Progress with automatic increment for known durations e.g. pro_pub.update(completed=1, when=+20)
• Custom JetStream API replacing nats-py private internals access

Changes

• 1.7 Subscription reliability: reader auto-recovers from NATS disconnects and consumer expiry, RPC responder auto-resubscribes, health_status property on all drivers (reader, publisher, RPC responder, connection) with reconnect counts, error tracking, slow consumer detection. Comprehensive test suite (194 tests) with testcontainers-based NATS fixtures.
• 1.5 Introduces live documents (LiveDocument, get_documentreader(), get_live_document()) for auto-updating configuration from NATS.
• 1.4 Contains improvements to the network problems recovery and connection tracking.
• 1.1 Switches to param 2.* nad py-nats 1.7.*. Also, publisher may reraise exceptions or ignore them.
• 1.0 Changes NATS subscriptions to pull only
• 0.12 Extends messges metdata of nats section, Handles reconnection of subscriptions,
• 0.11 Extends, tasks, NATS connection tracking and messenger opening options (Messenger.open)
• 0.10 Adds timestamp to journal messages and extablishes schema for journal messages.
• 0.9.1 Makes dependency to aiodns optional.
• 0.9.0 Introduces Logging handler for passing standard logging messages to the Messenger.
• 0.8 Introduces journal publishing/reading API.
• 0.7 Includes progress tracking messages in the Messenger API.
• 0.6 introduces breaking changes in the Messenger API:
  • Convenience functions get_xxxxx() returning publishers/readers are synchronous now. Remove await-ing for their results.
  • Change of signature of the callback for MsgRpcResponder.register_function for Rpc->None.

Credits

This package uses some code and ideas from the rich package (Copyright (c) 2020 Will McGugan).