How to use the Hyperf framework for exception handling

How to use the Hyperf framework for exception handling

Exception handling is a very important part when developing using the Hyperf framework. Good exception handling can make our applications more stable and reliable. In this article, I will introduce how to handle exceptions in the Hyperf framework, including how to catch exceptions, how to define custom exceptions, and how to handle global exceptions.

1. Exception catching

In the Hyperf framework, we can use PHP's try-catch statement to catch exceptions. Here is a simple sample code:

use HyperfHttpServerExceptionHttpException;
use HyperfHttpServerExceptionRequestExceptionHandlerInterface;

class CustomExceptionHandler implements RequestExceptionHandlerInterface
{
    public function handle(Throwable $throwable, ResponseInterface $response)
    {
        $statusCode = 500;
        $message = 'Internal Server Error';

        if ($throwable instanceof HttpException) {
            $statusCode = $throwable->getStatusCode();
            $message = $throwable->getMessage();
        }

        // 组装响应数据
        $data = [
            'code' => $statusCode,
            'message' => $message,
        ];

        // 返回JSON格式的响应
        return $response->json($data, $statusCode);
    }

    public function isValid(Throwable $throwable): bool
    {
        return true;
    }
}

In the above code, we define our own exception handler by implementing the RequestExceptionHandlerInterface interface. The handle method is used to handle exceptions and generate responses, and the isValid method is used to determine whether it should be handled by the current exception handler.

Then, configure it in the configuration file config/autoload/exceptions.php as follows:

return [
    // ...
    'handler' => [
        'http' => [
            CustomExceptionHandler::class,
        ],
    ],
];

In this way, when an exception occurs, we can capture it and processed.

2. Custom exceptions

In addition to catching exceptions thrown by the system, we can also customize exceptions and actively throw them in the code. Custom exceptions can help us better organize exception information and throw it to the corresponding exception handler as needed. The following is a sample code for a custom exception:

use HyperfServerExceptionServerException;

class CustomException extends ServerException
{
    public function __construct(string $message = 'Custom Exception', int $code = -1)
    {
        parent::__construct($message, $code);
    }
}

In the above code, we inherit the ServerException class and then pass the exception information through the constructor.

Using custom exceptions is also very simple. You just need to catch and throw them like system exceptions.

try {
    // some code...
} catch (CustomException $e) {
    // handle custom exception...
} catch (Throwable $e) {
    // handle other exceptions...
}

3. Global exception handling

In addition to using a separate exception handler to handle exceptions, the Hyperf framework also provides a global exception handling mechanism that can be used in the application's exception handler All exceptions are handled uniformly. The following is a sample code for a global exception handler:

use HyperfUtilsApplicationContext;
use HyperfExceptionHandlerExceptionHandler;
use PsrHttpMessageResponseInterface;
use Throwable;

class GlobalExceptionHandler extends ExceptionHandler
{
    public function handle(Throwable $throwable, ResponseInterface $response)
    {
        // handle exception...

        return $response;
    }

    public function isValid(Throwable $throwable): bool
    {
        return true;
    }
}

In the above code, we inherit the ExceptionHandler class and implement handle and isValidmethod. The handle method is used to handle exceptions and generate responses, and the isValid method is used to determine whether it should be handled by the current exception handler.

Then, configure it in the configuration file config/autoload/exceptions.php as follows:

return [
    // ...
    'handler' => [
        'http' => [
            GlobalExceptionHandler::class,
        ],
    ],
];

In this way, no matter where an exception is thrown, it will It will be handled uniformly by the global exception handler.

Summary:

Through the introduction of this article, we have learned how to handle exceptions in the Hyperf framework. We can handle exceptions gracefully by catching exceptions, defining custom exceptions, and using global exception handlers. Reasonable exception handling can improve the stability and reliability of the application. It is recommended to make full use of these functions during the development process.

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