Courseware image test

Introduce courseware image

Post major release cleanup

• Improve Code coverage
• Minor fixes and cleanup

QoS, Guaranteed Delivery and Linked Transport

v0.9.0

New Features

• Refactored Concurrency Model
• Unified Command Line Interface
• Linked Transports
• Circuit Breakers & Guaranteed’ Delivery

Behavioural Changes

• REST onramp and offramp have changed their configuration quite a lot, please checkout the docs for the onramp and offramp for reference.
• The REST offramp no longer adds newlines for batched events, this can now be done by using the lines postprocessor.
• Heredocs in tremor-script
  • no longer strip leading indentation
  • string interpolation using curly braces"""field: {event["field"]}""" has been added to heredocs
  • Literal curlies now need to be escaped using \{ or{{
• The generic::backpressure operator has been renamed to qos::backpressure.
• All operators have been streamlined to have their error output renamed to err, namely runtime::tremor, grouper::bucket and script inside trickle. Now pipelines, onramps, offramps and operators all output error events to err.

Modular user experience

Tremor has been enhanced to support modular development with:

• A TREMOR_PATH environment variable to load multiple module paths
• Nestable modules via the mod clause in tremor-script and tremor-query
• Tremor-query specific - Modularise definitions of windows, operators and scripts.
  • https://docs.tremor.rs/tremor-script/modules/
  • https://docs.tremor.rs/tremor-script/pp/
  • https://docs.tremor.rs/tremor-script/functions/
• Tremor-script specific - Adds functional programming, allows modules defining constants and functions
  • https://docs.tremor.rs/tremor-query/modules/
  • https://docs.tremor.rs/tremor-script/pp/
• Both tremor-script and tremor-query can use modules via the use clause
• Modules may be nested in source or via the file system ( a directory is a module ) or a mix of both
• A preprocessor processes multiple modular sources into a single deployable artefact

Pipeline State Mechanism

• Implementation for pipeline state mechanism: #59
• Pass in CPU target features for tremor compilation in the docker image: 1049ad4
• Tremor-script updates for a successful language server build: 35e6b9f
• Move to to use crates in tremor-script: #60

v0.7.0 release

This is the first open-source release of tremor.