feat(aop): add @Commit and @Rollback, @Before/AfterTransaction decorators

[biud436]

We must be added new decorators called Rollback, Comit, Before/AfterTransaction in the TransactionalZone.

State

• virtual transaction id

Rollback

In the rollback decorator, we have to pass error object that includes the method name to parameter.

Commit

in case of commit decorator, it has to pass a virtual transaction id to parameters.

Before/After Transaction

We need to pass a virtual transaction id. in the state called BeforeTransaction, the virtual transactiom id will be created.

Virtual Transaction ID

as you know that the HTTP Server is stateless. so to use the virtual transaction id for dividing a transaction, it will have to save transaction state to Store (like session store)

the Store is basically a Hash structure that needs an unique key. the unique key is the same as a fingerprint of user. generally, in case of session, the server can create the session key when it has completed a login process, and save it to cookie storage. However, in case of transaction, it can't implement it.

When enumerating methods of target class, we need to save some method to hash store.

/**
 * @type ITransactionStore
 */
export type ITransactionStore = {
    /**
     * 트랜잭션을 시작하기 전에 실행되는 메소드입니다.
     */
    [BEFORE_TRANSACTION_TOKEN]?: object;

    /**
     * 트랜잭션을 시작한 후에 실행되는 메소드입니다.
     */
    [AFTER_TRANSACTION_TOKEN]?: object;

    /**
     * 트랜잭션이 커밋된 후 실행되는 메소드입니다.
     */
    [TRANSACTION_COMMIT_TOKEN]?: object;

    /**
     * 트랜잭션이 롤백된 후 실행되는 메소드입니다.
     */
    [TRANSACTION_ROLLBACK_TOKEN]?: object;
};

and when performing the transaction, it can be executed by finding a stored method.

[biud436]