Alternative of EntityManager in neo4j is there or not
What version of Spring Data Neo4j are you running?
Spring Data Neo4j 5 does not provide any other level of abstraction by itself but uses the Neo4j-OGM under the hood (like Spring Data JPA does it with a JPA implementation).
You could opt-in to use the
SessionFactory that you can get injected into your classes. If you need any more information about this, feel free to reach out.
Spring Data Neo4j 6 (the project that was named SDN/RX during WIP) provides three levels of abstraction:
Neo4jClientNot aware of any mapping that was done but you could describe it as a Neo4j Driver on steroids. It participates in ongoing Spring transactions, has a fluent API for manual mapping etc.
Neo4jTemplateUses the metadata from the domain mapping to provide functionality for handling entities. I think this is basically what you are asking for.
Neo4jRepositoryThe third and highest level of abstraction.
Is there any alternative for entity manager in jpa for neo4j in spring data neo4j any idea over that
You did not answer my question which version of Neo4j-OGM or Spring Data Neo4j you are running.
If you do not use anything yet, you should consider using Spring Data Neo4j 6 with all the advantages you get as I have described above.
I am using neo4j-OGM -3.2.17 as I am using spring boot 2.3.5
@gerrit_meier any help over here.
Sorry, I somehow missed the mentioning.
In this case you are running SDN 5 and similar to a JPA EntityManager is the
SessionFactory provided by Neo4j-OGM (that works behind SDN 5).
After you created a
SessionFactory#openSession you can work with this to load and persist your objects.
It is possible to get a pre-configured
SessionFactory and also a
Session injected into your classes, if this is the way you want to use it.
Sessions participate in the Spring transactions, I advise not to mix up repositories and lower-level
You can read more about the
Session usage in the documentation: Reference - OGM Library
I actually need it for retrieval queries
We are using criteria builder and criteria query for JPA dynamic query implementation
TypedQuery<? extends ABC> query = em.createQuery(cr);
we are using such a thing
Now I got your question. No, there is no functionality that is equally to the criteria API.
There is something similar and this is the usage of filters with the
Session-based queries Reference - OGM Library
Is there any alternative to org.neo4j.ogm.session.Session in SDN 6 so as to run session.query(xyz.class, query, parameters);.
I mean to allow running custom query in SDN 6.
As I already said here How can we update database in spring boot without using repository - #2 by gerrit.meier there are several solutions.
Neo4jClient with its
query function for custom queries without automatic entity mapping or
Neo4jTemplate (e.g. with its
findAll method) with a CypherDSL (GitHub - neo4j-contrib/cypher-dsl: A Java DSL for the Cypher Query Language) produced statement.