Benedict created CASSANDRA-10063:
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Summary: Standardize use of collections, streams, iterables,
functions, predicates etc.
Key: CASSANDRA-10063
URL: https://issues.apache.org/jira/browse/CASSANDRA-10063
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: Benedict
Assignee: Benedict
Fix For: 3.x
With the advent of Java 8 we have a lot of different mechanisms for achieving
the same expression of ideas. We should standardize on (approximately) a single
approach across the codebase, as this will help clarity, reduce development
time (with less indecision about which set of tools to use, and how to
interface between the two), and improve icache occupancy.
The problem is exacerbated by the difficulty of interfacing between the two
paradigms, and this (IMO) introduces an unnecessary cognitive burden when they
inevitably meet. We should pick one and fill in whatever we're missing to make
it fit all of our needs. We should perform a bit of due diligence about the
implementation details of any utility methods we use also, as having dived into
a handful they are occasionally.... surprising. And probably not how we would
implement them (take {{Ordering.leastOf}} as an example).
Since it is the future, I think we should be standardising on the JDK8 Streams
API where possible. There are a couple of rough edges with interfacing with it
in some places, but we can smooth them and the result should be much more
legible code.
This really should not be a huge amount of work, and I expect will pay
dividends quite quickly.
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