如何修改Eclipselink JPA 2.0连接重试行为 [英] How To modify Eclipselink JPA 2.0 connection retry behavior

问题描述

如何修改Eclipselink JPA 2.0连接重试行为。
当它检测到连接失败时，Eclipselink会自动尝试重新连接到数据库，这会导致swing ui在没有任何响应的情况下冻结，直到它连接到数据库。
有任何解决方案来修改这个行为
Ie是可能的，当连接失败时抛出异常，而不重试
请帮助这个问题
我面临巨大的问题。 p>

我去了eclipselink源代码和google，但我找不到任何解决方案。

解决方案

使用SessionCustomizer可以禁用连接重新连接。

  
 import org.eclipse.persistence.internal.sessions.factories.SessionCustomizer; 
 import org.eclipse.persistence.sessions.Session; 
 import org.eclipse.persistence.sessions.DatabaseLogin; 
 
 public class EmployeeSessionCustomizer implements SessionCustomizer {
 
 public void customize（Sesssion session）{
 DatabaseLogin login =（DatabaseLogin）session.getDatasourceLogin（）; 
 login.setConnectionHealthValidationOnError（false）; 
} 
} 
  

此定制器可以通过持久性单元属性

 < property name =eclipselink.session.customizervalue =acme.EmployeeSessionCustomizer/& 
  

How To modify Eclipselink JPA 2.0 connection retry behavior . Eclipselink automatically tries to reconnect it self to database whenever it detects a connection failure this causes swing ui to freeze without any responses until it connects to database . Are there any solution to modify this behavior Ie is it possible to throw exception when connection fails without retrying Please help on this issue I am facing with huge problem.

I went throe eclipselink source code and google but I could not find any solution.

解决方案

Using a SessionCustomizer you can disable the connection reconnection.

package acme;
import  org.eclipse.persistence.internal.sessions.factories.SessionCustomizer;
import org.eclipse.persistence.sessions.Session;
import org.eclipse.persistence.sessions.DatabaseLogin;

public class EmployeeSessionCustomizer implements SessionCustomizer {

    public void customize(Sesssion session) {
        DatabaseLogin login = (DatabaseLogin)session.getDatasourceLogin();
        login.setConnectionHealthValidationOnError(false);
    }
}

This customizer can be set through a persistence unit property

 <property name="eclipselink.session.customizer" value="acme.EmployeeSessionCustomizer"/>

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