方面因 ClassCastException 尝试切入 Tomcat DataSource getConnection 而失败

我需要对来自 Tomcat JDBC 池的每个借用连接执行几个初始化语句.我无法使用 JDBCInterceptors，因为池与不需要上述初始化的其他应用程序共享.

I need to execute several initialization statements on each borrowed connection from a Tomcat JDBC Pool. I cannot use JDBCInterceptors because pool is shared with other applications that won't need said initilization.

我正在使用 Spring Boot 1.4.4，部署在 Tomcat 8.5.11 上，它在 context.xml 中有一个 ResourceLink 到 server.xml 中的一个资源，它定义了针对 Oracle 11g 数据库的数据源.我正在通过 JNDI 访问数据源.

I'm using Spring Boot 1.4.4, deploying on Tomcat 8.5.11, which has a ResourceLink in context.xml to a Resource in server.xml that defines the DataSource against a Oracle 11g Database. I'm accessing the DataSource via JNDI.

根据这个答案 https://stackoverflow.com/a/38746398 我想使用 Spring AOP 来实现我的目标.

As per this answer https://stackoverflow.com/a/38746398 I wanted to use Spring AOP to accomplish my goal.

如果 DataSource 直接在 context.xml 中定义，我已经创建了一个完美的方面，但如果通过 ResourceLink 引用到 server.xml 中的相同定义，则会出现 ClassCastException 失败

I have created and Aspect that works perfectly if the DataSource is defined directly in context.xml, but fails with a ClassCastException if referenced via a ResourceLink to the same definition in server.xml

例外是:

java.lang.ClassCastException: org.apache.tomcat.jdbc.pool.DataSource cannot be cast to org.apache.tomcat.jdbc.pool.DataSourceProxy
at org.apache.tomcat.jdbc.pool.DataSourceProxy$$FastClassBySpringCGLIB$$26808f96.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:52)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656)
at org.apache.tomcat.jdbc.pool.DataSource$$EnhancerBySpringCGLIB$$17f85659.getConnection(<generated>)

我的方面类:

import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class DataSourceAspect {

    private static final Logger LOG = LoggerFactory.getLogger(DataSourceAspect.class);

    @AfterReturning(pointcut = "execution(* org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection())")
    public void afterConnectionEstablished() {
        LOG.info("Borrowed connection from the pool. Initializing...");
    }
}

context.xml 中的ResourceLink 定义:

ResourceLink definition in context.xml:

<ResourceLink name="jdbc/us_j2eeCoreDS"
   global="jdbc/us_j2eeCoreDS"
   type="javax.sql.DataSource"/>

server.xml 中的数据源定义(更改私有值):

DataSource definition in server.xml (changed private values):

<Resource name="jdbc/us_j2eeCoreDS" type="javax.sql.DataSource"
         global="jdbc/us_j2eeCoreDS"
         factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
         driverClassName="oracle.jdbc.OracleDriver"
         username="xxx" password="xxx"
         initialSize="1"
         minIdle="1"
         maxIdle="4" maxWaitMillis="5000"
         maxActive="40"
         removeAbandonedOnBorrow="true" removeAbandonedTimeout="300"
         testWhileIdle="true"
         validationQuery="SELECT 1 FROM DUAL"
         timeBetweenEvictionRunsMillis="60000"
         url="jdbc:oracle:thin:@host:port:SID"/>

正如我之前所说，如果我在 context.xml 中定义完全相同的 DataSource，它可以完美运行.

As I said before, if I define the exact same DataSource in context.xml, it works flawlessly.

有什么线索吗?

非常感谢.