Simulated API Gateway service. More...

Collaboration diagram for ApiGatewayService:

Public Member Functions
trace_span	handle_request (const std::string &endpoint, const std::string &method)
	Handle incoming HTTP request.

trace_context	create_context (const trace_span &span)
	Create trace context for propagation.

Static Private Member Functions
static std::string	generate_trace_id ()

static std::string	generate_span_id ()

Private Attributes
std::string	service_name_ = "api_gateway"

Detailed Description

Simulated API Gateway service.

Examples: multi_service_tracing_example.cpp.

Definition at line 40 of file multi_service_tracing_example.cpp.

Member Function Documentation

◆ create_context()

trace_context ApiGatewayService::create_context ( const trace_span & span )

inline

Create trace context for propagation.

Examples: multi_service_tracing_example.cpp.

Definition at line 80 of file multi_service_tracing_example.cpp.

                                                         {
        trace_context ctx;
        ctx.trace_id = span.trace_id;
        ctx.span_id = span.span_id;
        ctx.trace_flags = "01";  // Sampled
        ctx.baggage = span.baggage;
 
        std::cout << "   → Context for propagation: "
                  << ctx.to_w3c_traceparent() << std::endl;
 
        return ctx;
    }

References kcenon::monitoring::trace_context::baggage, kcenon::monitoring::trace_span::baggage, kcenon::monitoring::trace_context::span_id, kcenon::monitoring::trace_span::span_id, kcenon::monitoring::trace_context::to_w3c_traceparent(), kcenon::monitoring::trace_context::trace_flags, kcenon::monitoring::trace_context::trace_id, and kcenon::monitoring::trace_span::trace_id.

Referenced by simulate_multi_service_request().

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◆ generate_span_id()

static std::string ApiGatewayService::generate_span_id ( )

inlinestaticprivate

Examples: multi_service_tracing_example.cpp.

Definition at line 103 of file multi_service_tracing_example.cpp.

                                        {
        // Generate 16-character hex string (8 bytes)
        std::string id;
        for (int i = 0; i < 16; ++i) {
            id += "0123456789abcdef"[rand() % 16];
        }
        return id;
    }

Referenced by handle_request().

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◆ generate_trace_id()

static std::string ApiGatewayService::generate_trace_id ( )

inlinestaticprivate

Examples: multi_service_tracing_example.cpp.

Definition at line 94 of file multi_service_tracing_example.cpp.

                                         {
        // Generate 32-character hex string (16 bytes)
        std::string id;
        for (int i = 0; i < 32; ++i) {
            id += "0123456789abcdef"[rand() % 16];
        }
        return id;
    }

Referenced by handle_request().

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◆ handle_request()

trace_span ApiGatewayService::handle_request	(	const std::string &	endpoint,
		const std::string &	method )

inline

Handle incoming HTTP request.

Examples: multi_service_tracing_example.cpp.

Definition at line 48 of file multi_service_tracing_example.cpp.

                                                                                  {
        std::cout << "\n[" << service_name_ << "] Processing " << method << " " << endpoint << std::endl;
 
        // Create root span for this request
        trace_span span;
        span.trace_id = generate_trace_id();
        span.span_id = generate_span_id();
        span.operation_name = "http_request";
        span.service_name = service_name_;
        span.start_time = std::chrono::system_clock::now();
 
        // Add HTTP-specific tags
        span.tags["http.method"] = method;
        span.tags["http.url"] = endpoint;
        span.tags["http.target"] = endpoint;
        span.tags["component"] = "http_server";
 
        // Add baggage for cross-cutting concerns
        span.baggage["user.id"] = "user-12345";
        span.baggage["session.id"] = "sess-67890";
        span.baggage["request.priority"] = "high";
 
        std::cout << "   → Created root span: " << span.span_id << std::endl;
        std::cout << "     Trace ID: " << span.trace_id << std::endl;
        std::cout << "     Baggage: user.id=" << span.baggage["user.id"] << std::endl;
 
        return span;
    }