org.springframework.transaction.support

Interface TransactionCallback<T>

Type Parameters:

T - the result type

All Known Implementing Classes:

TransactionCallbackWithoutResult

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface TransactionCallback<T>

Callback interface for transactional code. Used with TransactionTemplate's execute method, often as anonymous class within a method implementation.

Typically used to assemble various calls to transaction-unaware data access services into a higher-level service method with transaction demarcation. As an alternative, consider the use of declarative transaction demarcation (e.g. through Spring's Transactional annotation).

Since:

17.03.2003

Author:

Juergen Hoeller

See Also:

TransactionTemplate, CallbackPreferringPlatformTransactionManager

Method Summary

Modifier and Type	Method and Description
T	doInTransaction(TransactionStatus status) Gets called by TransactionTemplate.execute(org.springframework.transaction.support.TransactionCallback<T>) within a transactional context.

Method Detail

doInTransaction

@Nullable
T doInTransaction(TransactionStatus status)

Gets called by TransactionTemplate.execute(org.springframework.transaction.support.TransactionCallback<T>) within a transactional context. Does not need to care about transactions itself, although it can retrieve and influence the status of the current transaction via the given status object, e.g. setting rollback-only.

Allows for returning a result object created within the transaction, i.e. a domain object or a collection of domain objects. A RuntimeException thrown by the callback is treated as application exception that enforces a rollback. Any such exception will be propagated to the caller of the template, unless there is a problem rolling back, in which case a TransactionException will be thrown.

Parameters:

status - associated transaction status

Returns:

a result object, or null

See Also:

TransactionTemplate.execute(org.springframework.transaction.support.TransactionCallback<T>), CallbackPreferringPlatformTransactionManager.execute(org.springframework.transaction.TransactionDefinition, org.springframework.transaction.support.TransactionCallback<T>)