refactor(rule-engine): Revamp rule engine #452
Merged
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What is the purpose of this PR / why it is needed?
Refactor the rule engine code by moving it into a separate package and segregating the main building blocks into distinct source files. Along the way, shift the state machine states from expression names to simple integer indices representing sequence IDs.
As a side effect of the refactoring, a new config flag is introduced to designate if the rule engine match all strategy is enabled. If this strategy is enabled, a single event can trigger multiple rules, both simple and sequence rules.
What type of change does this PR introduce?
/kind feature (non-breaking change which adds functionality)
/kind refactor (non-breaking change that restructures the code, while not changing the original functionality)
Any specific area of the project related to this PR?
/area rule-engine
Special notes for the reviewer
Does this PR introduce a user-facing change?
Convey the new rule engine match strategy and highlight that the match all strategy is enabled by default.