com.arjuna.ats.internal.jdbc.drivers.PropertyFileDynamicClass Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* (C) 2009,
* @author JBoss Inc.
*/
package com.arjuna.ats.internal.jdbc.drivers;
import java.io.FileInputStream;
import java.io.IOException;
import java.sql.SQLException;
import java.util.Enumeration;
import java.util.Properties;
import javax.sql.XADataSource;
import com.arjuna.ats.internal.jdbc.DynamicClass;
/**
* A dynamic class that reads from a properties file and uses the information to
* instantiate and configure an XADataSource.
*
* The properties in the file must be as follows:
* xaDataSourceClassName : The name of the driver class that implements XADataSource
* All other properties in the file are read and a matching setter method called
* on the XADataSource. This allows for implementations that require non standard configuration.
* e.g.
* serverName=foo
* results in the method call
* setServerName("foo");
* in accordance with JavaBeans naming conventions.
*
* @author Jonathan Halliday ([email protected]) 2009-05
*/
public class PropertyFileDynamicClass implements DynamicClass
{
private static final String xaDataSourceClassNameProperty = "xaDataSourceClassName";
public XADataSource getDataSource(String propertyFileName) throws SQLException {
// read some system properties and use reflection to load and configure the datasource.
Properties properties = new Properties();
FileInputStream propertiesFileInputStream = null;
try {
propertiesFileInputStream = new FileInputStream(propertyFileName);
properties.load(propertiesFileInputStream);
propertiesFileInputStream.close();
} catch(IOException e) {
SQLException sqlException = new SQLException("failed to locate properties file");
sqlException.initCause(e);
throw sqlException;
} finally {
if(propertiesFileInputStream != null) {
try {
propertiesFileInputStream.close();
} catch(IOException e) {}
}
}
String xaDataSourceClassName = properties.getProperty(xaDataSourceClassNameProperty);
XADataSourceReflectionWrapper xaDataSourceReflectionWrapper = new XADataSourceReflectionWrapper(xaDataSourceClassName);
Enumeration enumeration = properties.propertyNames();
while(enumeration.hasMoreElements()) {
String propertyName = (String)enumeration.nextElement();
if(xaDataSourceClassNameProperty.equals(propertyName)) {
continue;
}
String propertyValue = (String)properties.get(propertyName);
try {
xaDataSourceReflectionWrapper.setProperty(propertyName, propertyValue);
} catch(Exception e) {
SQLException sqlException = new SQLException("failed to configure XADataSource");
sqlException.initCause(e);
throw sqlException;
}
}
return xaDataSourceReflectionWrapper.getWrappedXADataSource();
}
}