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@Catch - error handling
Easy way to handle errors thrown from a metho
The
@Catch() decorator provides an easy way to handle errors thrown from any method.
Also, it's provide a way to handle errors based on typeThe @Catch decorator can be applied on class level or method levelThe Catch decorator can be use with error types or without declaring on error types
Catch(handler: (err: Error | SugoiError) => any)Catch(handler: (err: Error | SugoiError) => any, ...errors: Array<string |Error | SugoiError>)@Catch(() => null)// will handle all the Errors and return null in case of an error
export class DecoratorCatch{
private static number: number = 1;
private instanceNumber: number = 0;
catchCheck(numberToCheck: number){
if(numberToCheck === 0){
throw new MyError('testing1',321);
}
else if(numberToCheck === 1){
throw new MyError2('testing2',321);
}
else if(numberToCheck === 2){
throw new Error('test generic error');
}
return this.instanceNumber;
}
}
While declaring an error type only error types of those type will be handled by the handler method
@Catch(() => null,
'MyError', MyError2)// will handle Errors of class 'MyError' only
// or instance of MyError2
// Returns null in case of an error
export class DecoratorCatch{
private static number: number = 1;
private instanceNumber: number = 0;
@Catch(function(err){
console.log('catcher got an error', err);
return this.instanceNumber - 1
}, 'Error') // will handle Errors of class 'Error' only
catchCheck(numberToCheck: number){
if(numberToCheck === 0){
throw new MyError('testing1',321);
}
else if(numberToCheck === 1){
throw new MyError2('testing2',321);
}
else if(numberToCheck === 2){
throw new Error('test generic error');
}
return this.instanceNumber;
}
}
Last modified 4yr ago