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Updates references to Eclipse in documentation (but IntelliJ is the preferred
editor now).
Also fixes incompatibilities with the Eclipse compiler.
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Optimize calls to potentially costly aggregators by only extracting the value
from a stateful aggregator when it is needed by subsequent RETE nodes.
This optimization only works with timeless evaluation and delete-and-rederive
evaluation disabled, i.e., only for queries without any recursion. Potentially,
it could also be extended to other mailboxes if needed.
We replace the BehaviorChangingMailbox of ColumnAggregatorNode with a
DefaultMailbox to force update batching. Batched updates only extract the value
from the aggregator when it has been already updated with all received tuples.
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Use a faster algorithm to detect cycles in the RETE network.
Only if cycles are detected fall back to the transitive closure algorithm to
construct the SCCs and the reduced graph.
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Let representative election be used in places where IncSCCAlg was used with
generic arguments other than Object.
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Use isomorphism-aware hashing to speed up RecipeRecognizer.
Due to possibly cyclic (recursive) recipes, we can't recursively turn recipes
into a canonical form. Recipes referring to already canonical (non-recurisve, or
recursive and entirely canonicalized) recipes can be hashed, while recursive
recipes in the middle of caninicalization still have to be compared more slowly
by their contents.
To keep the list of recipes compared by contents small, recipes are assigned a
hash code whenever possible.
We keep the equivalence class IDs for recipes, as there might be hash code
clashes, as well as recursive recipes that only later get assigned a hash code.
Also fixes a concurrency problem with equivalence class IDs by using an
AtomicLong.
Also reworks recipe instantiation, as now recipes might be canonicalized before
they are instantiated.
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Rename VIATRA subprojects to Refinery Interpreter to avoid interfering with
Eclipse Foundation trademarks.
Uses refering to a specific (historical) version of VIATRA were kept to avoid
ambiguity.
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Kristóf Marussy