我有一个需要访问MySQL数据库的JAX-RS restful服务。我正在尝试使用CDI和实体管理器来做到这一点。但是,当我发布应用程序时,似乎正在使用不正确的持久性单元(它试图在端口1527而不是3306上进行连接)。注入的实体管理器不使用正确的持久性单元
由在try/catch捕获的例外是:
javax.servlet.ServletException:
javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.3.0.v20110604-r9504):
org.eclipse.persistence.exceptions.DatabaseException
Internal Exception:
java.sql.SQLException:
Error in allocating a connection. Cause: Connection could not be allocated because:
java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect.
Error Code: 0
这里是RESTful服务:
@Path("/databases")
@Stateless
public class DatabaseResource {
@PersistenceUnit(unitName = "beta.example.services")
EntityManagerFactory entityManagerFactory;
@GET
@Produces(MediaType.APPLICATION_JSON)
public Response list() {
try {
EntityManager entityManager = entityManagerFactory.createEntityManager();
Connection connection = entityManager.unwrap(java.sql.Connection.class);
...
return Response.ok().build();
} catch (SchemaCrawlerException e) {
return Response.status(500).entity(e.getMessage()).build();
}
}
}
持久性单元(放在src/META-INF):
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
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">
<persistence-unit name="beta.example.services">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/" />
<property name="javax.persistence.jdbc.user" value="test" />
<property name="javax.persistence.jdbc.password" value="test" />
</properties>
</persistence-unit>
</persistence>
任何帮助,将不胜感激
我会检查数据库连接。您是否可以使用任何其他JDBC工具(如DbVisualizer)从与应用程序相同的机器连接到数据库? – DRCB
我目前在同一台机器上运行应用程序并且能够连接。我最初使用eclipse向导进行设置(并且仍可以ping数据库)。奇怪的部分是,它甚至不像它试图连接到正确的数据库。它试图连接1527端口(我相信这是德比)。我还检查了发布时,persistence.xml文件存在于'/ WEB-INF/classes/META-INF' –
哪个应用服务器?你在服务器配置中配置了数据源吗? – zeller