Resulter

Tired of throwing exceptions or returning nonsense? Well, Resulter will save you!

Resultable

Resulter provides simple to use Results. Why? Well, there are few benefits.

• Fewer exceptions or returning nonsense messages.
• Clear understanding of what went wrong with message() and error() methods.
• gRPC implementation.
• Project Reactor support.

Dependency

The dependency for Resulter is available on Maven Central.

• Gradle

implementation 'com.iamceph.resulter:resulter-core:1.1.6'

implementation("com.iamceph.resulter", "resulter-core", "1.1.6")
implementation("com.iamceph.resulter", "kotlin-extensions", "1.1.6")

• Maven

<dependency>
    <groupId>com.iamceph.resulter</groupId>
    <artifactId>resulter-core</artifactId>
    <version>1.1.6</version>
</dependency>

Example

//this operation ended normally
public class Test {
    public Resultable doSomething() {
        Resultable okResult = Resultable.ok();

        //this operation failed because it cannot find given user.
        Resultable failedResult = Resultable.fail("Cannot find user!");
    }
}

Example usage

public class UserService {
    public Resultable isAccessAllowed(Integer userId) {
        if (userId == 1) {
            return Resultable.ok();
        }

        return Resultable.fail("User is not allowed to access.");
    }

    public DataResultable<User> anotherCheck(Integer userId) {
        //let's get if the user can enter
        final Resultable result = isAccessAllowed(userId);
        if (result.isFail()) {
            return result.transform();
        }

        //this will fail if the user does not exist in the repo, neat, right? :)
        return DataResultable.failIfNull(userRepository.findUser(userId));
    }
}