Significantly rework `ConfigurationPropertyName` in an attempt to reduce
the amount of memory and garbage produced. The name elements are now
stored as CharSequences and whenever possible subsequences are used.
This helps to reduce the memory footprint since the underlying char
array can be shared between the source string, and the individual
elements.
For example: `ConfigurationProperty.of("foo.bar.baz")` will return
a name that provides access to the elements `foo`, `bar` and `baz`.
However, these three names all share the same char[], just using
different offsets and lengths.
See gh-9000
Improve ConfigurationPropertySource support by reworking some of the
stream calls based on advice offered by Tagir Valeev from JetBrains.
Also improved ConfigurationPropertySource.containsDescendantOf so that
it returns an enum rather than an Optional<Boolean> (again based on
feedback from Tagir).
See gh-9000
Rework the ConfigurationPropertySources and related adapter classes to
help with performance. The ConfigurationPropertySources class now only
monitors for updates when `.attach` is used. The `.get` methods now
return the adapted version, but no longer checks to see if sources have
been added or removed on each call.
This commit also fixes a few caching issues and makes both the
`PropertyMapper` implementations true static singletons.
See gh-9000
Refactor `ConfigFileApplicationListener` to use a `MultiValueMap` when
loading sources. The helps to simplify the code and removes the need
for the inner `LoadedPropertySources` class. We're also able to delete
the now unused `EnumerableCompositePropertySource` and
`PropertySourcesLoader` classes.
Fixes gh-9144
This commit makes sure the integration tests use the same versions as
the one managed by `spring-boot-dependencies` (including Maven plugins).
Closes gh-8947
Move `spring.rabbitmq.listener.*` to `spring.rabbitmq.listener.simple.*`
in preparation for Spring AMQP 2.0 that supports different container
types.
Closes gh-9108
See gh-9055
Stephane Nicoll
Andy Wilkinson
Phillip Webb
Artem Bilan
Oliver Weiler
Johnny Lim
Gary Russell
Madhura Bhave