Spring配置的Hibernate OGM提供程序 [英] Hibernate OGM provider for Spring configuration
问题描述
我创建了一个Java应用程序,可以使用SQL Server或Neo4j作为数据库,而不需要触及应用程序层,我只需修改提供程序和连接信息,如下所示:
<?xml version =1.0encoding =UTF-8?>
< persistence xmlns =http://java.sun.com/xml/ns/persistence
xmlns:xsi =http://www.w3.org/2001/XMLSchema-instance
xsi:schemaLocation =http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd
version = 2.0 >
< persistence-unit name =jpa-tutorialtransaction-type =RESOURCE_LOCAL>
<! - 对于SQL Server - >
<! - provider> org.hibernate.ejb.HibernatePersistence< / provider>
<! - class> com.mycompany.hibernate.Atom< / class - >
<! - 对于Neo4j - >
< provider> org.hibernate.ogm.jpa.HibernateOgmPersistence< / provider>
<属性>
<! - 对于Neo4j - >
< property name =hibernate.ogm.datastore.providervalue =neo4j_embedded/>
< property name =hibernate.ogm.neo4j.database_pathvalue =D:/Stage/Neo4j/NEO4J_HOME_4/data/graph.db/>
<! - 对于SQL Server - >
<! - property name =javax.persistence.jdbc.drivervalue =com.mysql.jdbc.Driver/>
< property name =javax.persistence.jdbc.urlvalue =jdbc:mysql:// localhost:3306 / atom/>
< property name =javax.persistence.jdbc.uservalue =root/>
< property name =javax.persistence.jdbc.passwordvalue =/>
< property name =hibernate.dialectvalue =org.hibernate.dialect.MySQLDialect/>
< property name =hibernate.show_sqlvalue =true/>
< / properties>
< / persistence-unit>
< /余辉>
我现在可以用Spring应用程序做同样的事情。我开始学习Spring,但发现了一个全新的逻辑。例如,JPA有另外一个提供者:
< bean class =org.springframework.orm.jpa.vendor .HibernateJpaVendorAdapter>
这是否意味着无法像第一个应用程序那样执行相同的操作?我的意思是没有Hibernate OGM提供程序,我可以放在 HibernateJpaVendorAdapter
的地方,以使应用程序在Neo4j上运行而不是在SQL Server上运行。
预先感谢。
PS:我查看了Spring Data,但发现定义实体的另一个区别(@NodeEntity,@GraphId,@ RelatedTo等)。我被要求不要触及应用程序代码。
以下是Java配置类(注意我使用的是spring你可以根据你的要求进行修改)
$ @ $ $ $ b $ @ $ @ $ $ $ $ $ $ b $ com.kp.swasthik.mongo.dao},entityManagerFactoryRef =mongoEntityManager,transactionManagerRef =mongoTransactionManager)
public class MongDbConfig {
@Bean(name = mongoEntityManager)
public LocalContainerEntityManagerFactoryBean mongoEntityManager()throws Throwable {
Map< String,Object> properties = new HashMap< String,Object>();
properties.put(javax.persistence.transactionType,resource_local);
properties.put(hibernate.ogm.datastore.provider,mongodb);
properties.put(hibernate.ogm.datastore.host,localhost);
properties.put(hibernate.ogm.datastore.port,27017);
properties.put(hibernate.ogm.datastore.database,kpdb);
properties.put(hibernate.ogm.datastore.create_database,true);
LocalContainerEntityManagerFactoryBean entityManager = new LocalContainerEntityManagerFactoryBean();
entityManager.setPackagesToScan(com.kp.swasthik.mongo.domain);
entityManager.setPersistenceUnitName(mongoPersistenceUnit);
entityManager.setJpaPropertyMap(properties);
entityManager.setPersistenceProviderClass(HibernateOgmPersistence.class);
返回entityManager;
$ b @Bean(name =mongoTransactionManager)
Public PlatformTransactionManager transactionManager()throws Throwable {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(mongoEntityManager()。getObject());
返回transactionManager;
}
}
关于@NodeEntity的第二个问题@GraphId等。与hibernate类似,OGM sprig使用spring-data为redo,mongodb,cassandra,hbase,couchdb,solr,elasticsearch等nosql数据存储提供了jpa实现。@NodeEnity和@GraphId用于neo4j
I created a Java application that can use SQL Server or Neo4j as a database without touching the application layer, I just modify the provider and the connection information, like follows:
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="jpa-tutorial" transaction-type="RESOURCE_LOCAL">
<!--For SQL Server-->
<!--provider>org.hibernate.ejb.HibernatePersistence</provider>
<!--class>com.mycompany.hibernate.Atom</class-->
<!--For Neo4j-->
<provider>org.hibernate.ogm.jpa.HibernateOgmPersistence</provider>
<properties>
<!--For Neo4j-->
<property name="hibernate.ogm.datastore.provider" value="neo4j_embedded" />
<property name="hibernate.ogm.neo4j.database_path" value="D:/Stage/Neo4j/NEO4J_HOME_4/data/graph.db" />
<!--For SQL Server-->
<!--property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/atom" />
<property name="javax.persistence.jdbc.user" value="root" />
<property name="javax.persistence.jdbc.password" value="" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.hbm2ddl.auto" value="updatr" /-->
</properties>
</persistence-unit>
</persistence>
I have now to make the same thing but with a Spring application. I've started learning Spring but found a completely new logic. For example, there is a different provider of JPA:
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
Does that mean that there's no way to do the same as the first application? I mean there's no Hibernate OGM provider that I can just put in the place of HibernateJpaVendorAdapter
in order to make the application running on Neo4j rather than SQL Server?
Thanks in advance.
PS: I checked out Spring Data but found another difference in defining entities (@NodeEntity, @GraphId, @RelatedTo, etc.). I'm asked not to touch the application code.
Here is the below Java configuration class(Note I'm using spring boot, you could modify according you your requirement)
@Configuration
@EnableJpaRepositories(basePackages = {
"com.kp.swasthik.mongo.dao" }, entityManagerFactoryRef = "mongoEntityManager", transactionManagerRef = "mongoTransactionManager")
public class MongDbConfig {
@Bean(name = "mongoEntityManager")
public LocalContainerEntityManagerFactoryBean mongoEntityManager() throws Throwable {
Map<String, Object> properties = new HashMap<String, Object>();
properties.put("javax.persistence.transactionType", "resource_local");
properties.put("hibernate.ogm.datastore.provider","mongodb");
properties.put("hibernate.ogm.datastore.host","localhost");
properties.put("hibernate.ogm.datastore.port","27017");
properties.put("hibernate.ogm.datastore.database", "kpdb");
properties.put("hibernate.ogm.datastore.create_database", "true");
LocalContainerEntityManagerFactoryBean entityManager = new LocalContainerEntityManagerFactoryBean();
entityManager.setPackagesToScan("com.kp.swasthik.mongo.domain");
entityManager.setPersistenceUnitName("mongoPersistenceUnit");
entityManager.setJpaPropertyMap(properties);
entityManager.setPersistenceProviderClass(HibernateOgmPersistence.class);
return entityManager;
}
@Bean(name = "mongoTransactionManager")
public PlatformTransactionManager transactionManager() throws Throwable {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(mongoEntityManager().getObject());
return transactionManager;
}
}
Regarding your Second question on @NodeEntity @GraphId etc. Similar to hibernate OGM sprig provides jpa implementation for no sql using spring-data for number of nosql datastores such as redis, mongodb,cassandra, hbase, couchdb, solr, elasticsearch etc. @NodeEnity and @GraphId is used in neo4j
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