SpringBoot2.0 | SpringBoot 常用组件 | Application Framework library

when you are creating the child component put @Primary annotation

Indicates that a bean should be given preference when multiple candidates are qualified to autowire a single-valued dependency

so you'll have

Indeed, in the latest version of Spring Data, findOne returns an optional. If you want to retrieve the object from the Optional, you can simply use get() on the Optional. First of all though, a repository should return the optional to a service, which then handles the case in which the optional is empty. afterwards, the service should return the object to the controller.

You can find differences and migration guide here : https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.0-Migration-Guide

• Java 8 is base version
• properties changed
• spring.jackson.serialization.write-dates-as-timestamps=true is default value
• Spring Security configuration become easier
• Spring Security Oauth2 merges into Spring Security

and so on..

I tried reaching Neo4j team and here is the response I received.

The root problem is the dependency mismatch between SpringBoot and Neo4j on jetty. The problem occurs because you are using the MultiDriverTestClass from the neo4j-ogm-test module. It will spawn a Neo4j instance that will take request over the given transport mode defined via the protocol you defined in your ogm.properties file. If you would alter your test base to an embedded instance, you could work around the problem: Remove the MultiDriverTestClass inheritance and create a Configuration on your own like Configuration configuration = new Configuration.Builder(new ClasspathConfigurationSource("ogm.properties")).build();. The content of the ogm.properties should be empty to force OGM to create a new temporary embedded instance.

@Cacheable allows you to specify the sync attribute to ensure only a single thread is building the cache value.

How to check:

Access the cached data by sending the two parallel request and modify the data. The second thread should get only updated value.