Question

我试图通过扩展JDBC appender来将我的日志数据存储到数据库中来添加自定义appender。但是我需要从spring注入的dataSource覆盖数据库连接。它不适合我，因为log4j上下文首先加载，而spring上下文尚未初始化。所以我得到了Spring注入DataSource的Null指针异常。

我完全是春天的新手。如果可能，请给我一个例子。

**This is how my Spring configuration looks like..**



 <!-- DataSource -->
<bean id="dataSource" class="*******" destroy-method="close"
    p:driverClassName="XXXXX" 
    p:url="jdbc:oracle://****"
    p:username="root"
    p:password="password"/>

<!-- Hibernate session factory -->
<bean id="sessionFactory"
    class="org.springframework.orm.hibernate4.annotation.AnnotationSessionFactoryBean"
    p:dataSource-ref="dataSource">
    <property name="packagesToScan" value="com.beans"/>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
            <prop key="hibernate.show_sql">true</prop>
            <prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</prop>
        </props>
    </property>
</bean> 

<!-- Transaction Manager -->
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
       <property name="sessionFactory">        <ref bean="sessionFactory" />
</property>




My log4j Configuration



<appender name="SMTT-JDBC" class="com.XXX.XXX.CustomAppender">  
                <errorHandler class="org.apache.log4j.varia.FallbackErrorHandler">  
                        <appender-ref ref="FILE"/>  
                </errorHandler>  
                <param name="Threshold" value="INFO"/>     
                <layout class="org.apache.log4j.PatternLayout">  
                        <param name="ConversionPattern"  
                                value="INSERT INTO LOGS VALUES ('%x', current_timestamp ,'%C','%p','%m')" />  
                </layout>  
   </appender>  


This is how my Custom Appender looks like:



public class CustomJDBCAppender extends org.apache.log4j.jdbc.JDBCAppender {

 protected java.sql.Connection getConnection() throws java.sql.SQLException
   {

        /* I need to get Connection From Spring configuration */

     }

     protected void closeConnection() throws java.sql.SQLException {
             if (connection != null && !connection.isClosed())
                   connection.close();
     }
}



`

log4j自定义jdbc appender，带有spring依赖注入数据源

0 个答案: