WithSpanResult | Workflows

func WithSpanResult[Result any](
    ctx context.Context,
    name string,
    f func(ctx context.Context) (Result, error),
) (Result, error)

Wrap a function with a tracing span using the current runner’s tracer and return the function result.

Use WithSpanResult inside a task Execute method. If the context is not a task execution context, the function runs without creating a span.

Parameters

ctx context.Context required

The task execution context.

name string required

The name of the span.

f func(context.Context) (Result, error) required

The function to wrap.

Returns

The result and error returned by f.

Usage example

import (
    "context"
    "fmt"
    "log/slog"

    "github.com/tilebox/tilebox-go/workflows/v1"
)

type ProcessScene struct{}

func (t *ProcessScene) Execute(ctx context.Context) error {
    pixels, err := workflows.WithSpanResult(
        ctx,
        "compute-index",
        func(ctx context.Context) (int, error) {
            // Compute an index here.
            return 42, nil
        },
    )
    if err != nil {
        return fmt.Errorf("failed to compute index: %w", err)
    }

    slog.InfoContext(
        ctx,
        "index computed",
        slog.Int("pixels", pixels),
    )
    return nil
}