WSCallHelper.jdbcCall implementation for WAS 8

Question

我有这个类

package com.middleware.jdbc.j2ee.websphere;
public class WS50NativeJDBCExtractorImpl implements NativeJDBCExtractorInf {
private Class webSphere5ConnectionClass;        
private Method webSphere5NativeConnectionMethod;    
private Class webSphere5StatementClass;   
private Method webSphere5NativeStatementMethod;
public WS50NativeJDBCExtractorImpl() throws Exception {
    try {
        this.webSphere5ConnectionClass = getClass().getClassLoader().loadClass("com.ibm.ws.rsadapter.jdbc.WSJdbcConnection");
        Class jdbcAdapterUtilClass = getClass().getClassLoader().loadClass("com.ibm.ws.rsadapter.jdbc.WSJdbcUtil");
        this.webSphere5NativeConnectionMethod = jdbcAdapterUtilClass.getMethod("getNativeConnection", new Class[] { this.webSphere5ConnectionClass });
        this.webSphere5StatementClass = getClass().getClassLoader().loadClass("com.ibm.ws.rsadapter.jdbc.WSJdbcStatement");
        this.webSphere5NativeStatementMethod = webSphere5StatementClass.getDeclaredMethod("getJDBCImplObject", null);
        this.webSphere5NativeStatementMethod.setAccessible(true);
    } catch (Exception ex) {
        e.printStackTrace();
    }
}
public Connection getConnection(Connection c) throws Exception {
    if (this.webSphere5ConnectionClass != null && this.webSphere5ConnectionClass.isAssignableFrom(c.getClass())) {
        try {
            return (Connection) this.webSphere5NativeConnectionMethod.invoke(null, new Object[] { c });
        } catch (Throwable e) {
            e.printStackTrace();
        }
    } else {
        return c;
    }
}
private Object primGetStatement(Statement stmt) throws Exception {
    if (this.webSphere5StatementClass != null && this.webSphere5StatementClass.isAssignableFrom(stmt.getClass())) {
        try {
            return this.webSphere5NativeStatementMethod.invoke(stmt, null);
        } catch (Throwable e) {
            e.printStackTrace();
        }
    } else {
        return stmt;
    }
}
public CallableStatement getCallableStatement(CallableStatement cs) throws Exception {
    return (CallableStatement) primGetStatement(cs);
}}

我想按照WAS8信息中心的建议使用WSCallHelper.jdbcCall，但我无法正确使用。我试过

Object st = WSCallHelper.jdbcCall(null, this.webSphere5StatementClass, "getJDBCImplObject", new Object[]{}, new Class[]{});

我收到NOT_A_JDBC_OBJECT错误。当我没有使用WSCallHelper时，我得到了

java.lang.ClassCastException: oracle.jdbc.driver.OracleCallableStatementWrapper incompatible with oracle.jdbc.OracleCallableStatement

我还试着使用

CallableStatement cStmt = getCallableStatement(call);
if(stmt.isWrapperFor(OracleCallableStatement.class)){
    OracleCallableStatement ocs = (OracleCallableStatement) stmt;
}

（其中调用变量具有SQL语句）。上面说stmt没有包装。

我正在使用上面的类连接到Oracle9i数据库。有人知道如何将WSCallHelper.jdbcCall用于上面的代码吗？谢谢

Answer 1

您可以使用以下代码获得oracle连接。

OracleConnection oracleConn=null;
if (conn!=null){
oracleConn= (OracleConnection) WSJdbcUtil.getNativeConnection((WSJdbcConnection) conn);
}

其中conn是通过WAS数据源获得的java.sql连接。现在您可以使用oracleConn对象来实现所需的结果。

Answer 2

if (con!=null){
    con = (Connection) WSCallHelper.getNativeConnection((WSJdbcConnection) con);
}

这对我很有效。从com.ibm.websphere.rsadapter.WSCallHelper获取Native连接，并将其强制转换为oracle连接对象。

Answer 3

应该指出的是，这个问题还有一个JDBC规范的标准解决方案：

OracleCallableStatement ocs = stmt.unwrap(OracleCallableStatement.class);

或者对于连接，

OracleConnection oracleConn = conn.unwrap(OracleConnection.class);
OracleCallableStatement ocs = oracleConn.prepareCall(sql);