[英]JPA: Reuse persistence.xml with jta-data-source in JSE and JUnit by overriding the datasource
我有這個peristence.xml
上WildFly部署:
<persistence-unit name="optaweb-employee-rostering-persistence-unit" transaction-type="JTA">
<jta-data-source>java:jboss/datasources/ExampleDS</jta-data-source>
...
</persistence-unit>
現在,我想在具有直接JDBC連接的純Java應用程序中重用它,因此沒有JNDI :
Map<String, String> properties = new HashMap<>();
properties.put("javax.persistence.jdbc.driver", "org.hsqldb.jdbcDriver");
properties.put("javax.persistence.jdbc.url", "jdbc:hsqldb:mem:testdb");
properties.put("javax.persistence.jdbc.user", "sa");
properties.put("javax.persistence.jdbc.password", "");
// Overwrites transaction-type successfully
properties.put("javax.persistence.transactionType", "RESOURCE_LOCAL");
// TODO overwrite jta-data-source
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory(
"optaweb-employee-rostering-persistence-unit", properties);
如何覆蓋jta-data-source
?
我嘗試了許多JPA屬性來覆蓋jta-data-source
,但沒有成功:
// Overwrites jta-data-source
// but triggers a JNDI lookup of "" which crashes of course
properties.put("javax.persistence.jtaDataSource", "");
// Does not overwrite jta-data-source
properties.put("javax.persistence.jtaDataSource", null);
// Does not overwrite jta-data-source
properties.put("javax.persistence.nonJtaDataSource", "foo");
我還嘗試了許多特定於休眠的屬性,例如hibernate.transaction.coordinator_class
和hibernate.connection.datasource
,它們的失敗結果與上述相同。
據我從Hibernate ORM(尤其是org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl#EntityManagerFactoryBuilderImpl(org.hibernate.jpa.boot.spi.PersistenceUnitDescriptor, java.util.Map, java.lang.ClassLoader, org.hibernate.boot.registry.classloading.spi.ClassLoaderService)
),這些特定的JPA設置會覆蓋hibernate.properties
或您將提供給Persistence.createEntityManagerFactory
的Map中的設置。
這可能是一個愚蠢的主意,但是您是否不能做相反的事情,即不在持久性單元中設置數據源,而是通過WildFly應用程序中的hibernate.properties
文件設置它呢? 然后,您可以在普通的Java應用程序中執行任何操作。
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