英文:
How to configure transaction-type="JTA" programmatically (without persistence.xml")?
问题
我可以在配置的Java类中创建EntityManagerFactory时设置transaction-type为"JTA"，而无需任何.xml配置吗？
英文:
Can I set transaction-type "JTA" when creating EntityManagerFactory in configuration java class without any .xml configs?
答案1
得分: 3
你可以尝试以以下方式覆盖javax.persistence.transactionType属性：
Map configOverrides = new HashMap();
configOverrides.put("javax.persistence.transactionType", "JTA");
EntityManagerFactory emf = Persistence.createEntityManagerFactory("yourPersistenceUnitName", configOverrides);
但是如果在类路径中不存在META-INF/persistence.xml文件，可能会引发PersistenceException异常。
请参阅文档（2.2.2. 启动部分）。
英文:
You can try to override the javax.persistence.transactionType property in this way:
Map configOverrides = new HashMap();
configOverrides.put("javax.persistence.transactionType", "JTA");
EntityManagerFactory emf = Persistence.createEntityManagerFactory("yourPersistenceUnitName", configOverrides);
But it looks like the PersistenceException exception will be raised if the META-INF/persistence.xml file is absent in your classpath.
See the documentation (section 2.2.2. Bootstrapping).
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