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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <stdint.h>
#include <chrono>
#include <string>
#include <utility>
#include "opentelemetry/common/timestamp.h"
#include "opentelemetry/context/context.h"
#include "opentelemetry/context/context_value.h"
#include "opentelemetry/context/runtime_context.h"
#include "opentelemetry/logs/event_id.h"
#include "opentelemetry/logs/log_record.h"
#include "opentelemetry/logs/noop.h"
#include "opentelemetry/logs/severity.h"
#include "opentelemetry/nostd/shared_ptr.h"
#include "opentelemetry/nostd/string_view.h"
#include "opentelemetry/nostd/unique_ptr.h"
#include "opentelemetry/nostd/variant.h"
#include "opentelemetry/sdk/instrumentationscope/instrumentation_scope.h"
#include "opentelemetry/sdk/instrumentationscope/scope_configurator.h"
#include "opentelemetry/sdk/logs/logger.h"
#include "opentelemetry/sdk/logs/logger_config.h"
#include "opentelemetry/sdk/logs/logger_context.h"
#include "opentelemetry/sdk/logs/processor.h"
#include "opentelemetry/sdk/logs/recordable.h"
#include "opentelemetry/trace/context.h"
#include "opentelemetry/trace/span.h"
#include "opentelemetry/trace/span_context.h"
#include "opentelemetry/trace/span_id.h"
#include "opentelemetry/trace/span_metadata.h"
#include "opentelemetry/trace/trace_flags.h"
#include "opentelemetry/version.h"
OPENTELEMETRY_BEGIN_NAMESPACE
namespace sdk
{
namespace logs
{
namespace trace_api = opentelemetry::trace;
namespace common = opentelemetry::common;
namespace context = opentelemetry::context;
namespace nostd = opentelemetry::nostd;
namespace
{
nostd::string_view GetEventName(const opentelemetry::logs::EventId &event_id) noexcept
{
return event_id.name_ != nullptr ? nostd::string_view{event_id.name_.get()}
: nostd::string_view{};
}
bool IsAllowedByTraceBasedFiltering(const context::Context &context,
const LoggerConfig &logger_config) noexcept
{
if (!logger_config.IsTraceBased())
{
return true;
}
const trace_api::SpanContext span_context = trace_api::GetSpan(context)->GetContext();
if (!span_context.span_id().IsValid())
{
return true;
}
return span_context.trace_flags().IsSampled();
}
} // namespace
opentelemetry::logs::NoopLogger Logger::kNoopLogger = opentelemetry::logs::NoopLogger();
Logger::Logger(
opentelemetry::nostd::string_view name,
std::shared_ptr<LoggerContext> context,
std::unique_ptr<instrumentationscope::InstrumentationScope> instrumentation_scope) noexcept
: logger_name_(std::string(name)),
instrumentation_scope_(std::move(instrumentation_scope)),
context_(std::move(context)),
logger_config_(context_->GetLoggerConfigurator().ComputeConfig(*instrumentation_scope_))
{
SetMinimumSeverity(logger_config_.IsEnabled()
? static_cast<uint8_t>(logger_config_.GetMinimumSeverity())
: opentelemetry::logs::kMaxSeverity);
}
const opentelemetry::nostd::string_view Logger::GetName() noexcept
{
if (!logger_config_.IsEnabled())
{
return kNoopLogger.GetName();
}
return logger_name_;
}
opentelemetry::nostd::unique_ptr<opentelemetry::logs::LogRecord> Logger::CreateLogRecord() noexcept
{
if (!logger_config_.IsEnabled())
{
return kNoopLogger.CreateLogRecord();
}
auto recordable = context_->GetProcessor().MakeRecordable();
recordable->SetObservedTimestamp(std::chrono::system_clock::now());
// Get the current span metadata from the runtime context
const auto current_context = context::RuntimeContext::GetCurrent();
if (current_context.HasKey(trace_api::kSpanKey))
{
const context::ContextValue context_value = current_context.GetValue(trace_api::kSpanKey);
const trace_api::SpanContext span_context = [&context_value]() {
// Get the span metadata from the active span in the runtime context
if (const nostd::shared_ptr<trace_api::Span> *maybe_span =
nostd::get_if<nostd::shared_ptr<trace_api::Span>>(&context_value))
{
const nostd::shared_ptr<trace_api::Span> &span = *maybe_span;
return span->GetContext();
}
// Get the span metadata directly from a SpanContext in the runtime context.
// TODO: This path is unused and may be removed in the future.
else if (const nostd::shared_ptr<trace_api::SpanContext> *maybe_span_context =
nostd::get_if<nostd::shared_ptr<trace_api::SpanContext>>(&context_value))
{
const nostd::shared_ptr<trace_api::SpanContext> &span_context = *maybe_span_context;
return *span_context;
}
return trace_api::SpanContext::GetInvalid();
}();
if (span_context.IsValid())
{
recordable->SetTraceId(span_context.trace_id());
recordable->SetTraceFlags(span_context.trace_flags());
recordable->SetSpanId(span_context.span_id());
}
}
return opentelemetry::nostd::unique_ptr<opentelemetry::logs::LogRecord>(recordable.release());
}
void Logger::EmitLogRecord(
opentelemetry::nostd::unique_ptr<opentelemetry::logs::LogRecord> &&log_record) noexcept
{
if (!logger_config_.IsEnabled())
{
return kNoopLogger.EmitLogRecord(std::move(log_record));
}
if (!log_record)
{
return;
}
std::unique_ptr<Recordable> recordable =
std::unique_ptr<Recordable>(static_cast<Recordable *>(log_record.release()));
recordable->SetResource(context_->GetResource());
recordable->SetInstrumentationScope(GetInstrumentationScope());
auto &processor = context_->GetProcessor();
// TODO: Sampler (should include check for minSeverity)
// Send the log recordable to the processor
processor.OnEmit(std::move(recordable));
}
bool Logger::EnabledImplementation(opentelemetry::logs::Severity severity,
const opentelemetry::logs::EventId &event_id) const noexcept
{
const auto ¤t = context::RuntimeContext::GetCurrent();
if (!IsAllowedByTraceBasedFiltering(current, logger_config_))
{
return false;
}
return context_->GetProcessor().Enabled(current, GetInstrumentationScope(), severity,
GetEventName(event_id));
}
bool Logger::EnabledImplementation(opentelemetry::logs::Severity severity,
int64_t /*event_id*/) const noexcept
{
const auto ¤t = context::RuntimeContext::GetCurrent();
if (!IsAllowedByTraceBasedFiltering(current, logger_config_))
{
return false;
}
return context_->GetProcessor().Enabled(current, GetInstrumentationScope(), severity);
}
#if OPENTELEMETRY_ABI_VERSION_NO >= 2
bool Logger::EnabledImplementation(const opentelemetry::context::Context &context,
opentelemetry::logs::Severity severity) const noexcept
{
if (!IsAllowedByTraceBasedFiltering(context, logger_config_))
{
return false;
}
return context_->GetProcessor().Enabled(context, GetInstrumentationScope(), severity);
}
bool Logger::EnabledImplementation(const opentelemetry::context::Context &context,
opentelemetry::logs::Severity severity,
const opentelemetry::logs::EventId &event_id) const noexcept
{
if (!IsAllowedByTraceBasedFiltering(context, logger_config_))
{
return false;
}
return context_->GetProcessor().Enabled(context, GetInstrumentationScope(), severity,
GetEventName(event_id));
}
#endif // OPENTELEMETRY_ABI_VERSION_NO >= 2
const opentelemetry::sdk::instrumentationscope::InstrumentationScope &
Logger::GetInstrumentationScope() const noexcept
{
return *instrumentation_scope_;
}
} // namespace logs
} // namespace sdk
OPENTELEMETRY_END_NAMESPACE
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