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telemetry: Move callbacks to Zeek

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Now that we run callbacks on the main loop, we can move callback support
for Counter and Gauge instances directly into Zeek and don't need to patch
prometheus-cpp anymore.
This commit is contained in:
Arne Welzel 2024-09-11 17:49:06 +02:00
parent c7fcdc4050
commit 48dd89ef33
15 changed files with 143 additions and 186 deletions
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12
src/telemetry/Manager.h
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@ -31,6 +31,10 @@ class Registry;
namespace zeek::telemetry {
namespace detail {
using CollectCallbackPtr = std::function<double()>;
}
class ZeekCollectable;
/**
@ -98,12 +102,12 @@ public:
*/
CounterPtr CounterInstance(std::string_view prefix, std::string_view name, Span<const LabelView> labels,
std::string_view helptext, std::string_view unit = "",
prometheus::CollectCallbackPtr callback = nullptr);
detail::CollectCallbackPtr callback = nullptr);
/// @copydoc counterInstance
CounterPtr CounterInstance(std::string_view prefix, std::string_view name, std::initializer_list<LabelView> labels,
std::string_view helptext, std::string_view unit = "",
prometheus::CollectCallbackPtr callback = nullptr);
detail::CollectCallbackPtr callback = nullptr);
/**
* @return A gauge metric family. Creates the family lazily if necessary.
@ -134,12 +138,12 @@ public:
*/
GaugePtr GaugeInstance(std::string_view prefix, std::string_view name, Span<const LabelView> labels,
std::string_view helptext, std::string_view unit = "",
prometheus::CollectCallbackPtr callback = nullptr);
detail::CollectCallbackPtr callback = nullptr);
/// @copydoc GaugeInstance
GaugePtr GaugeInstance(std::string_view prefix, std::string_view name, std::initializer_list<LabelView> labels,
std::string_view helptext, std::string_view unit = "",
prometheus::CollectCallbackPtr callback = nullptr);
detail::CollectCallbackPtr callback = nullptr);
// Forces the compiler to use the type `Span<const T>` instead of trying to
// match parameters to a `span`.