如何在JPA中使用多个数据源 [英] How to use more than one data sources in JPA

问题描述

我想同时使用两个数据源，并根据情况使用它们. 我可以在 persistence.xml 中添加多个数据源吗?

I want to use two data sources at same time and use them based on the condition. Can I add multiple data sources in persistence.xml like:

<jta-data-source>gov/v3/jdbc/dataSource1</jta-data-source>
<jta-data-source>gov/v3/jdbc/dataSource2</jta-data-source>

请发送您的建议.

注意:应用程序服务器是weblogic 10.3

Note: Application server is weblogic 10.3

推荐答案

您可以通过以下方式在 persistence.xml 中配置多个数据源:

You can configure multiple datasources in your persistence.xml this way:

<persistence ...>
  <persistence-unit name="persistence-unit-1">
    <jta-data-source>jdbc/persistence-unit-1</jta-data-source>
    ...
  </persistence-unit>
  <persistence-unit name="persistence-unit-2">
     <jta-data-source>jdbc/persistence-unit-2</jta-data-source>
     ...
  </persistence-unit>
</persistence>

按以下方式使用应用程序中的这些数据源:

Use these datasources from your application as follows:

EntityManagerFactory emf = Persistence.createEntityManagerFactory("persistence-unit-1");
EntityManager em = emf.createEntityManager();

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