Spring Data Neo4J 4.0.0:BeforeSaveEvent没有触发? [英] Spring Data Neo4J 4.0.0: BeforeSaveEvent not firing?
问题描述
我正在尝试在Spring中设置Neo4J时捕获BeforeSaveEvent,这样我就可以在正在保存的类上调用方法 beforeSave()
。不幸的是,它似乎没有被注册为监听器,因为我的打印语句正在执行。
I'm trying to capture the BeforeSaveEvent when setting up Neo4J in Spring, so that I can call a method beforeSave()
on the class that is being saved. Unfortunately, it seems like its not being registered as a listener as non of my print statements are being executed.
赞赏的想法。
@Configuration
@EnableNeo4jRepositories(basePackages = "com.noxgroup.nitro")
@EnableTransactionManagement
public class NitroNeo4jConfiguration extends Neo4jConfiguration {
@Bean
public Neo4jServer neo4jServer () {
System.setProperty("username", "neo4j");
System.setProperty("password", "*************");
return new RemoteServer("http://localhost:7474");
}
@Bean
public SessionFactory getSessionFactory() {
return new SessionFactory("com.noxgroup.nitro.domain");
}
@Bean
ApplicationListener<BeforeSaveEvent> beforeSaveEventApplicationListener() {
return new ApplicationListener<BeforeSaveEvent>() {
@Override
public void onApplicationEvent(BeforeSaveEvent event) {
System.out.println("Listening to event");
Object entity = event.getEntity();
if (entity instanceof NitroNode) {
((NitroNode)entity).beforeSave();
} else {
System.out.println("Not picking it up");
}
}
};
}
}
推荐答案
这些事件由Neo4jTemplate触发(参见 http://docs.spring.io/spring-data/neo4j/docs/4.0.0.M1/reference/html/#_data_manipulation_events_formerly_lifecycle_events ),这就是你必须用来触发的东西保存。
These events are fired by Neo4jTemplate (see http://docs.spring.io/spring-data/neo4j/docs/4.0.0.M1/reference/html/#_data_manipulation_events_formerly_lifecycle_events), so that's what you'll have to use to trigger the save.
在您的配置中 NitroNeo4jConfiguration
包含
@Bean
public Neo4jOperations getNeo4jTemplate() throws Exception {
return new Neo4jTemplate(getSession());
}
并在您的申请中,
@Autowired
private Neo4jOperations neo4jTemplate;
然后用于保存
neo4jTemplate.save(person);
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