How to Handle Errors in Goroutines with Channels?

Handling Errors in Goroutines with Channels

In Go, functions often return a value and an error, allowing you to handle potential errors in your code. When executing a function in a goroutine and passing data via channels, the question arises of how to handle errors effectively.

One common approach is to create a custom struct to bundle the results. This struct can include both a message and an error field, allowing you to return both pieces of information over a single channel.

type Result struct {
    Message string
    Error error
}

ch := make(chan Result)

In your goroutine, you can create a Result struct with the appropriate message and error values. Then, send the struct over the channel.

func createHashedPasswordAsync(password string, ch chan Result) {
    // Code to create hashed password
    
    result := Result{
        Message: "Hash created",
    }
    
    if err != nil {
        result.Error = err
    }
    
    ch <- result
}

In the main goroutine, you can receive the Result struct and handle the message and error accordingly.

result := <-ch
if result.Error != nil {
    // Handle error
} else {
    // Do something with the message
}

By using a custom struct to bundle the results, you can effectively handle errors in goroutines and pass both the message and error over a single channel.

The above is the detailed content of How to Handle Errors in Goroutines with Channels?. For more information, please follow other related articles on the PHP Chinese website!