Kas saaksid anda olukordi või juhtumeid, kus konteksti kontseptsiooni kasutatakse?

In Go, the concept of context.Context is used to manage the lifecycle of operations, cancellations, timeouts, and passing values between goroutines.

Main use cases:

• Cancel operations: for example, when working with network requests or databases, a long operation can be canceled if the client interrupts the request.
• Timeouts and deadlines: you can set a maximum execution time for an operation, after which it will be automatically canceled.
• Passing values: for example, request IDs, authentication tokens, metadata needed at different call levels.

Example:

func HandleRequest(ctx context.Context) {
    select {
    case <-time.After(5 * time.Second):
        // Perform work
    case <-ctx.Done():
        // Operation canceled or deadline exceeded
        return
    }
}

The context helps in writing more manageable and responsive code, especially in concurrent and network applications.