The source a metric reads its current adapter from, decoupled from Registry so that metric_base can resolve a binding without depending on the registry layer (which would be an include cycle), mirroring ScopeState.
More...
#include <adapter.hpp>
Public Member Functions | |
| AdapterSource ()=default | |
| AdapterSource (const AdapterSource &)=delete | |
| AdapterSource & | operator= (const AdapterSource &)=delete |
| AdapterSource (AdapterSource &&)=delete | |
| AdapterSource & | operator= (AdapterSource &&)=delete |
| virtual | ~AdapterSource ()=default |
| virtual std::uint64_t | version () const noexcept=0 |
| Monotonic counter, bumped on every adapter swap. | |
| virtual AdapterPtr | adapter () const =0 |
| The current adapter, never null. | |
Detailed Description
The source a metric reads its current adapter from, decoupled from Registry so that metric_base can resolve a binding without depending on the registry layer (which would be an include cycle), mirroring ScopeState.
Every MetricCore holds a shared_ptr<AdapterSource> — the AdapterCell of the Registry that created it, or the process-wide global cell for standalone and scoped metrics. version() advances whenever the adapter is swapped, which is how an already-created metric notices it must re-register against the new backend on its next use (live migration).
Constructor & Destructor Documentation
◆ AdapterSource() [1/3]
|
default |
◆ AdapterSource() [2/3]
|
delete |
◆ AdapterSource() [3/3]
|
delete |
◆ ~AdapterSource()
|
virtualdefault |
Member Function Documentation
◆ adapter()
|
pure virtual |
The current adapter, never null.
Returns a shared_ptr copy so a concurrent swap cannot invalidate the adapter an in-flight caller uses.
Implemented in prom::AdapterCell.
◆ operator=() [1/2]
|
delete |
◆ operator=() [2/2]
|
delete |
◆ version()
|
pure virtualnoexcept |
Monotonic counter, bumped on every adapter swap.
Implemented in prom::AdapterCell.
The documentation for this class was generated from the following file:
- include/prom/adapter.hpp
