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Fix metrics context circular reference #1535

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merged 16 commits into from
Aug 11, 2022
Merged

Fix metrics context circular reference #1535

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aad1981
Fix metrics context circular reference
esigo Jul 30, 2022
e1d217d
Merge branch 'main' into metrics-context-circular-reference
esigo Jul 31, 2022
266f757
Merge branch 'main' into metrics-context-circular-reference
esigo Aug 9, 2022
61795b2
revert changes from main merge
esigo Aug 9, 2022
d1aa868
collector cannot have smart pointer to the context
esigo Aug 9, 2022
4b8b3f1
fix CI
esigo Aug 9, 2022
37fe3d1
context and storage null check
esigo Aug 9, 2022
42473ab
revert unrelated change
esigo Aug 9, 2022
c7486c9
fix log messages
esigo Aug 9, 2022
f6afdb2
format
esigo Aug 9, 2022
10c8f81
format
esigo Aug 9, 2022
7ac22d7
revert unrelated change
esigo Aug 9, 2022
ecda02d
Merge branch 'main' into metrics-context-circular-reference
esigo Aug 10, 2022
236672c
Merge branch 'main' into metrics-context-circular-reference
lalitb Aug 10, 2022
e7ee255
Merge branch 'main' into metrics-context-circular-reference
esigo Aug 10, 2022
a4052af
Merge branch 'main' into metrics-context-circular-reference
esigo Aug 11, 2022
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7 changes: 4 additions & 3 deletions sdk/include/opentelemetry/sdk/metrics/meter.h
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,7 @@ class Meter final : public opentelemetry::metrics::Meter
public:
/** Construct a new Meter with the given pipeline. */
explicit Meter(
std::shared_ptr<sdk::metrics::MeterContext> meter_context,
std::weak_ptr<sdk::metrics::MeterContext> meter_context,
std::unique_ptr<opentelemetry::sdk::instrumentationscope::InstrumentationScope> scope =
opentelemetry::sdk::instrumentationscope::InstrumentationScope::Create("")) noexcept;

Expand Down Expand Up @@ -122,7 +122,7 @@ class Meter final : public opentelemetry::metrics::Meter
// order of declaration is important here - instrumentation scope should destroy after
// meter-context.
std::unique_ptr<sdk::instrumentationscope::InstrumentationScope> scope_;
std::shared_ptr<sdk::metrics::MeterContext> meter_context_;
std::weak_ptr<sdk::metrics::MeterContext> meter_context_;
// Mapping between instrument-name and Aggregation Storage.
std::unordered_map<std::string, std::shared_ptr<MetricStorage>> storage_registry_;

Expand All @@ -135,7 +135,8 @@ class Meter final : public opentelemetry::metrics::Meter
void *),
void *state = nullptr)
{
auto view_registry = meter_context_->GetViewRegistry();
auto ctx = meter_context_.lock();
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Should we be checking if the ctx is valid here?

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makes sense. Shall we log something too?

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yes, I think we should log here if meter context is no more valid.

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done

auto view_registry = ctx->GetViewRegistry();
auto success = view_registry->FindViews(
instrument_descriptor, *scope_,
[this, &instrument_descriptor, callback, state](const View &view) {
Expand Down
2 changes: 1 addition & 1 deletion sdk/include/opentelemetry/sdk/metrics/state/metric_collector.h
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Expand Up @@ -48,7 +48,7 @@ class MetricCollector : public MetricProducer, public CollectorHandle
bool Shutdown(std::chrono::microseconds timeout = std::chrono::microseconds::max()) noexcept;

private:
std::shared_ptr<MeterContext> meter_context_;
std::weak_ptr<MeterContext> meter_context_;
std::shared_ptr<MetricReader> metric_reader_;
};
} // namespace metrics
Expand Down
11 changes: 6 additions & 5 deletions sdk/src/metrics/meter.cc
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Expand Up @@ -24,7 +24,7 @@ namespace metrics = opentelemetry::metrics;
namespace nostd = opentelemetry::nostd;

Meter::Meter(
std::shared_ptr<MeterContext> meter_context,
std::weak_ptr<MeterContext> meter_context,
std::unique_ptr<sdk::instrumentationscope::InstrumentationScope> instrumentation_scope) noexcept
: scope_{std::move(instrumentation_scope)}, meter_context_{meter_context}
{}
Expand Down Expand Up @@ -201,7 +201,8 @@ const sdk::instrumentationscope::InstrumentationScope *Meter::GetInstrumentation
std::unique_ptr<WritableMetricStorage> Meter::RegisterMetricStorage(
InstrumentDescriptor &instrument_descriptor)
{
auto view_registry = meter_context_->GetViewRegistry();
auto ctx = meter_context_.lock();
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Check if ctx is valid here before using?

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done

auto view_registry = ctx->GetViewRegistry();
std::unique_ptr<WritableMetricStorage> storages(new MultiMetricStorage());

auto success = view_registry->FindViews(
Expand Down Expand Up @@ -238,11 +239,11 @@ std::vector<MetricData> Meter::Collect(CollectorHandle *collector,
opentelemetry::common::SystemTimestamp collect_ts) noexcept
{
std::vector<MetricData> metric_data_list;
auto ctx = meter_context_.lock();
for (auto &metric_storage : storage_registry_)
{
metric_storage.second->Collect(collector, meter_context_->GetCollectors(),
meter_context_->GetSDKStartTime(), collect_ts,
[&metric_data_list](MetricData metric_data) {
metric_storage.second->Collect(collector, ctx->GetCollectors(), ctx->GetSDKStartTime(),
collect_ts, [&metric_data_list](MetricData metric_data) {
metric_data_list.push_back(metric_data);
return true;
});
Expand Down
5 changes: 3 additions & 2 deletions sdk/src/metrics/state/metric_collector.cc
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Expand Up @@ -33,15 +33,16 @@ bool MetricCollector::Collect(
nostd::function_ref<bool(ResourceMetrics &metric_data)> callback) noexcept
{
ResourceMetrics resource_metrics;
for (auto &meter : meter_context_->GetMeters())
auto ctx = meter_context_.lock();
for (auto &meter : ctx->GetMeters())
{
auto collection_ts = std::chrono::system_clock::now();
ScopeMetrics scope_metrics;
scope_metrics.metric_data_ = meter->Collect(this, collection_ts);
scope_metrics.scope_ = meter->GetInstrumentationScope();
resource_metrics.scope_metric_data_.push_back(scope_metrics);
}
resource_metrics.resource_ = &meter_context_->GetResource();
resource_metrics.resource_ = &ctx->GetResource();
callback(resource_metrics);
return true;
}
Expand Down