Previously, actuator endpoints were registered with Jersey upon
injection of the ResourceConfig bean into a registrar class rather than
using a ResourceConfigCustomizer. This was done to fix a problem
when running the Actuator on a separate port where the main application
context's customizers were also applied to the management context,
breaking the singleton contract for those resources. This approach
meant that the registration could be performed at any point after the
ResourceConfig had been created. When Jersey's configured as a Filter
this resulted in the registration failing as the attempt was being made
after the Filter lifecyle callbacks which make the ResourceConfig
immutable.
This commit reworks the endpoint registration to be performed using a
ManagementContextResourceConfigCustomizer, a resource config customizer
that's only applied to the ResourceConfig that's used by the Actuator.
When there's a separate management context, this ResourceConfig is
created by the Actuator's auto-configuration and the management context
resource config customizers are applied to it during its creation. The
main application's customizers are not applied. When the actuator is
using the same context as the main application, this ResourceConfig is
created by the main application. In this case a
ResourceConfigCustomizer is defined that delegates to all
ManagementContextResourceConfigCustomizers, allowing them to register
the actuator endpoints with the main ResourceConfig.
Fixes gh-25262
Previously, when the mappings endpoint was not available, the beans
that provide mapping descriptions were still created. This resulted
in unnecessary CPU and memory usage collecting and storing
information that would never by used.
This commit updates the auto-configuration for the mappings endpoint
so that all the beans that it creates are conditional on the endpoint
being available, rather than only the endpoint bean itself.
Closes gh-23977
This commit updates DataSourceUnwrapper to take a separate interface
type argument if the target datasource has to be unwrapped, given that
the target type is usually not an interface.
Closes gh-24697
Phillip Webb
Stephane Nicoll
dreis2211
izeye
Andy Wilkinson
bono007
Madhura Bhave
Hatef Palizgar
Pedro Ivo Machado
Pascal Schumacher