This is the orginal "A bean is an object that is instantiated, assembled, and otherwise managed by a Spring IoC container". Here's an extra word of "otherwise".
This commit adds a new `StartupStep` interface and its factory
`ApplicationStartup`. Such steps are created, tagged with metadata and
thir execution time can be recorded - in order to collect metrics about
the application startup.
The default implementation is a "no-op" variant and has no side-effect.
Other implementations can record and collect events in a dedicated
metrics system or profiling tools. We provide here an implementation for
recording and storing steps with Java Flight Recorder.
This commit also instruments the Spring application context to gather
metrics about various phases of the application context, such as:
* context refresh phase
* bean definition registry post-processing
* bean factory post-processing
* beans instantiation and post-processing
Third part libraries involved in the Spring application context can
reuse the same infrastructure to record similar metrics.
Closes gh-24878
Prior to this commit, The "auto grow" feature in SpEL expressions only
worked for element types with a default constructor. For example, auto
grow did not work for a list of BigDecimal elements.
This commit inserts a null value in the list when no default
constructor can be found for the element type.
Closes gh-25367
Because of security and broader industry support, support for several
remoting technologies is now deprecated and scheduled for removal in
Spring Framework 6.0.
This commit deprecates the following remoting technologies:
* HTTPInvoker
* RMI
* Hessian
* JMS remoting
Other remoting technologies like EJB or JAXWS might be deprecated in the
future depending on industry support.
Closes gh-25379
This commit introduces support for R2DBC ("Reactive Relational Database
Connectivity") with custom ConnectionFactory implementations, a
functional DatabaseClient for SQL execution, transaction management, a
bind marker abstraction database initialization utilities, and
exception translation.
Closes gh-25065
This commit introduces a change in reactive transaction semantics for
cancel signals. Canceling a subscription now rolls back a reactive transaction
to achieve a deterministic transaction outcome.
Previously, cancel signals committed a transaction which could
cause partially committed transactions depending on when the cancel happened.
Juergen Hoeller