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/* ====================================================================
*
* The ObjectStyle Group Software License, version 1.1
* ObjectStyle Group - http://objectstyle.org/
*
* Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
* of the software. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if any,
* must include the following acknowlegement:
* "This product includes software developed by independent contributors
* and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, email
* "andrus at objectstyle dot org".
*
* 5. Products derived from this software may not be called "ObjectStyle"
* or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
* names without prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE OBJECTSTYLE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals and hosted on ObjectStyle Group web site. For more
* information on the ObjectStyle Group, please see
* .
*/
package org.objectstyle.cayenne.conf;
import java.io.InputStream;
import javax.sql.DataSource;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.objectstyle.cayenne.ConfigurationException;
import org.objectstyle.cayenne.access.ConnectionLogger;
import org.objectstyle.cayenne.access.QueryLogger;
import org.objectstyle.cayenne.conn.DataSourceInfo;
import org.objectstyle.cayenne.conn.PoolManager;
import org.objectstyle.cayenne.util.Util;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
/**
* Creates DataSource objects from XML configuration files that describe a JDBC driver.
* Wraps JDBC driver in a generic DataSource implementation.
*
* @author Andrei Adamchik
*/
// TODO: factory shouldn't contain any state specific to location ("driverInfo" ivar
// should go, and probably "parser" too)... Otherwise the API doesn't make sense -
// sequential invocations of getDataSource() will have side effects....
public class DriverDataSourceFactory implements DataSourceFactory {
private static Logger logObj = Logger.getLogger(DriverDataSourceFactory.class);
protected XMLReader parser;
protected DataSourceInfo driverInfo;
protected Configuration parentConfiguration;
/**
* Creates new DriverDataSourceFactory.
*/
public DriverDataSourceFactory() throws Exception {
this.parser = Util.createXmlReader();
}
/**
* Stores configuration object internally to use it later for resource loading.
*/
public void initializeWithParentConfiguration(Configuration parentConfiguration) {
this.parentConfiguration = parentConfiguration;
}
/**
* @deprecated since 1.2
*/
public DataSource getDataSource(String location, Level logLevel) throws Exception {
return this.getDataSource(location);
}
public DataSource getDataSource(String location) throws Exception {
this.load(location);
ConnectionLogger logger = new ConnectionLogger();
try {
return new PoolManager(driverInfo.getJdbcDriver(), driverInfo
.getDataSourceUrl(), driverInfo.getMinConnections(), driverInfo
.getMaxConnections(), driverInfo.getUserName(), driverInfo
.getPassword(), logger);
}
catch (Exception ex) {
QueryLogger.logConnectFailure(ex);
throw ex;
}
}
/**
* Returns DataSourceInfo property.
*/
protected DataSourceInfo getDriverInfo() {
return this.driverInfo;
}
protected InputStream getInputStream(String location) {
if (this.parentConfiguration == null) {
throw new ConfigurationException(
"No parent Configuration set - cannot continue.");
}
return this.parentConfiguration.getResourceLocator().findResourceStream(location);
}
/**
* Loads driver information from the file at location. Called
* internally from "getDataSource"
*/
protected void load(String location) throws Exception {
logObj.info("loading driver information from '" + location + "'.");
InputStream in = this.getInputStream(location);
if (in == null) {
logObj.info("Error: location '" + location + "' not found.");
throw new ConfigurationException(
"Can't find DataSource configuration file at " + location);
}
RootHandler handler = new RootHandler();
parser.setContentHandler(handler);
parser.setErrorHandler(handler);
parser.parse(new InputSource(in));
}
// SAX handlers start below
/** Handler for the root element. Its only child must be the "driver" element. */
private class RootHandler extends DefaultHandler {
/**
* Handles the start of a "driver" element. A driver handler is created and
* initialized with the element name and attributes.
*
* @exception SAXException if the tag given is not "driver"
*/
public void startElement(
String namespaceURI,
String localName,
String qName,
Attributes atts) throws SAXException {
if (localName.equals("driver")) {
new DriverHandler(parser, this).init(localName, atts);
}
else {
logObj.info( " must be the root element. <"
+ localName
+ "> is unexpected.");
throw new SAXException("Config file is not of expected XML type. '"
+ localName
+ "' unexpected.");
}
}
}
/** Handler for the "driver" element. */
private class DriverHandler extends AbstractHandler {
public DriverHandler(XMLReader parser, ContentHandler parentHandler) {
super(parser, parentHandler);
}
public void init(String name, Attributes attrs) {
String className = attrs.getValue("", "class");
logObj.info( "loading driver " + className);
driverInfo = new DataSourceInfo();
driverInfo.setJdbcDriver(className);
}
/**
* Handles the start of a driver child element. An appropriate handler is created
* and initialized with the element name and attributes.
*
* @exception SAXException if the tag given is not recognized.
*/
public void startElement(
String namespaceURI,
String localName,
String qName,
Attributes atts) throws SAXException {
if (localName.equals("login")) {
new LoginHandler(this.parser, this).init(localName, atts, driverInfo);
}
else if (localName.equals("url")) {
new UrlHandler(this.parser, this).init(localName, atts, driverInfo);
}
else if (localName.equals("connectionPool")) {
new ConnectionHandler(this.parser, this)
.init(localName, atts, driverInfo);
}
else {
logObj.info( " are valid. <"
+ localName
+ "> is unexpected.");
throw new SAXException("Config file is not of expected XML type");
}
}
}
private class UrlHandler extends AbstractHandler {
/**
* Constructor which just delegates to the superconstructor.
*
* @param parentHandler The handler which should be restored to the parser at the
* end of the element. Must not be null.
*/
public UrlHandler(XMLReader parser, ContentHandler parentHandler) {
super(parser, parentHandler);
}
public void init(String name, Attributes atts, DataSourceInfo driverInfo)
throws SAXException {
driverInfo.setDataSourceUrl(atts.getValue("value"));
if (driverInfo.getDataSourceUrl() == null) {
logObj.info( "error: has no 'value'.");
throw new SAXException("'
