Introducing Troy: The schema-safe Cassandra toolkit - Advanced
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It is worth noting that Troy doesn't connect to Cassandra during compilation. Instead, the schema is provided as CQL scripts, checked-in within same code base, consisting of plain CREATE TABLE CQL statements. That get's loaded at compile-time into a light-weight Schema engine capable of analysing queries and providing information about column types.
Those CQL scripts can be written as increments, by adding new scripts containing ALTER TABLE statement, instead of editing existing scripts. This allows Troy to check backwards and forward compatibility of queries against different versions of the schema. As well as providing tools to write migration scripts.
Currently, Troy uses reflection-based black-box macros. But also has a working proof-of-concept using the new style inline/meta as well.
There will be slides and code, along with live coding examples.
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Introducing Troy: The schema-safe Cassandra toolkit - Advanced
Tamer AbdulRadi
Tamer is a Senior Software Engineer at Disney Streaming Services, building and maintaining distributed systems armed with nothing but Scala, types and the power of functional programming.