org.springframework.data.neo4j.template

Interface Neo4jCallback<T>

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 Neo4jCallback<T>

Callback interface for Neo4j OGM code. To be used with Neo4jTemplate's execution methods, often as anonymous classes within a method implementation. A typical implementation will call Session.load/find/update to perform some operations on persistent objects.

Since:

4.2

Author:

Juergen Hoeller

See Also:

Neo4jTemplate, Neo4jTransactionManager

Method Summary

Modifier and Type	Method and Description
T	doInNeo4jOgm(org.neo4j.ogm.session.Session session) Gets called by Neo4jTemplate.doExecute with an active OGM Session.

Method Detail

doInNeo4jOgm

T doInNeo4jOgm(org.neo4j.ogm.session.Session session)

Gets called by Neo4jTemplate.doExecute with an active OGM Session. Does not need to care about activating or closing the Session, or handling transactions.

Allows for returning a result object created within the callback, i.e. a domain object or a collection of domain objects. A thrown custom RuntimeException is treated as an application exception: It gets propagated to the caller of the template.

Parameters:

session - active Neo4j session

Returns:

a result object, or null if none