alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Spring Framework example source code file (WebLogicNativeJdbcExtractor.java)

This example Spring Framework source code file (WebLogicNativeJdbcExtractor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

class, class, connection, connection, illegalstateexception, jdbc, jdbc_extension_name, jdbc_extension_name, method, nativejdbcextractoradapter, reflection, sql, sqlexception, string, weblogic, weblogicnativejdbcextractor, weblogicnativejdbcextractor

The Spring Framework WebLogicNativeJdbcExtractor.java source code

/*
 * Copyright 2002-2008 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.jdbc.support.nativejdbc;

import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.SQLException;

import org.springframework.util.ReflectionUtils;

/**
 * Implementation of the {@link NativeJdbcExtractor} interface for WebLogic,
 * supporting WebLogic Server 8.1 and higher.
 *
 * <p>Returns the underlying native Connection to application code instead
 * of WebLogic's wrapper implementation; unwraps the Connection for native
 * statements. The returned JDBC classes can then safely be cast, e.g. to
 * <code>oracle.jdbc.OracleConnection.
 *
 * <p>This NativeJdbcExtractor can be set just to allow working
 * with a WebLogic DataSource: If a given object is not a WebLogic
 * Connection wrapper, it will be returned as-is.
 *
 * @author Thomas Risberg
 * @author Juergen Hoeller
 * @since 1.0.2
 * @see #getNativeConnection
 * @see weblogic.jdbc.extensions.WLConnection#getVendorConnection
 */
public class WebLogicNativeJdbcExtractor extends NativeJdbcExtractorAdapter {

	private static final String JDBC_EXTENSION_NAME = "weblogic.jdbc.extensions.WLConnection";


	private final Class jdbcExtensionClass;

	private final Method getVendorConnectionMethod;


	/**
	 * This constructor retrieves the WebLogic JDBC extension interface,
	 * so we can get the underlying vendor connection using reflection.
	 */
	public WebLogicNativeJdbcExtractor() {
		try {
			this.jdbcExtensionClass = getClass().getClassLoader().loadClass(JDBC_EXTENSION_NAME);
			this.getVendorConnectionMethod = this.jdbcExtensionClass.getMethod("getVendorConnection", (Class[]) null);
		}
		catch (Exception ex) {
			throw new IllegalStateException(
					"Could not initialize WebLogicNativeJdbcExtractor because WebLogic API classes are not available: " + ex);
		}
	}


	/**
	 * Return <code>true, as WebLogic returns wrapped Statements.
	 */
	public boolean isNativeConnectionNecessaryForNativeStatements() {
		return true;
	}

	/**
	 * Return <code>true, as WebLogic returns wrapped PreparedStatements.
	 */
	public boolean isNativeConnectionNecessaryForNativePreparedStatements() {
		return true;
	}

	/**
	 * Return <code>true, as WebLogic returns wrapped CallableStatements.
	 */
	public boolean isNativeConnectionNecessaryForNativeCallableStatements() {
		return true;
	}

	/**
	 * Retrieve the Connection via WebLogic's <code>getVendorConnection method.
	 */
	protected Connection doGetNativeConnection(Connection con) throws SQLException {
		if (this.jdbcExtensionClass.isAssignableFrom(con.getClass())) {
			return (Connection) ReflectionUtils.invokeJdbcMethod(this.getVendorConnectionMethod, con);
		}
		return con;
	}

}

Other Spring Framework examples (source code examples)

Here is a short list of links related to this Spring Framework WebLogicNativeJdbcExtractor.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.