org.openmdx.application.dataprovider.kernel.LateBindingDataSource Maven / Gradle / Ivy
/*
* ====================================================================
* Project: openMDX/Core, http://www.openmdx.org/
* Description: Late Binding Data Source
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2004-2013, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR 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 product includes or is based on software developed by other
* organizations as listed in the NOTICE file.
*/
package org.openmdx.application.dataprovider.kernel;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.SQLException;
import javax.naming.InitialContext;
import javax.sql.DataSource;
import org.openmdx.kernel.exception.BasicException;
import org.openmdx.kernel.exception.Throwables;
import org.openmdx.kernel.log.SysLog;
import java.util.logging.Logger;
import java.sql.SQLFeatureNotSupportedException;
/**
* Late Binding DataSource
*/
public class LateBindingDataSource implements DataSource {
/**
* Constructor
*
* @param jndiName the DataSource's JNDI name
*/
public LateBindingDataSource(
String jndiName
){
this.jndiName = jndiName;
}
/**
* The DataSource is retrieved lazily
*/
private DataSource delegate;
/**
* The JNDI name refers usually to an entry in the java:comp/env/jdbc context
*/
private final String jndiName;
/**
* Look up the DataSource
*
* @return the DataSource corresponding to the JNDI name
*
* @throws ServiceException
*/
private synchronized DataSource getDelegate(
) throws SQLException {
if (this.delegate == null){
try {
SysLog.detail(
"Acquire Connection Pool",
this.jndiName
);
this.delegate = (DataSource)new InitialContext().lookup(this.jndiName);
} catch(Exception exception) {
throw Throwables.initCause(
new SQLException("Could not lookup data source"),
exception,
BasicException.Code.DEFAULT_DOMAIN,
BasicException.Code.MEDIA_ACCESS_FAILURE,
new BasicException.Parameter("jndiName", this.jndiName)
);
}
}
return this.delegate;
}
/**
* Returns a connection.
*
* The connection must be closed when it is not needed any more.
*/
public java.sql.Connection getConnection(
) throws SQLException {
try {
return this.getDelegate().getConnection();
} catch(Exception ex) {
// Mix-in the JNDI name even in case of SQL exceptions
throw Throwables.initCause(
new SQLException("Connection acquisition failed"),
ex,
BasicException.Code.DEFAULT_DOMAIN,
BasicException.Code.MEDIA_ACCESS_FAILURE,
new BasicException.Parameter("jndiName", this.jndiName)
);
}
}
public Connection getConnection(
String username,
String password
) throws SQLException {
return this.getDelegate().getConnection(username, password);
}
public int getLoginTimeout(
) throws SQLException {
return this.getDelegate().getLoginTimeout();
}
public PrintWriter getLogWriter(
) throws SQLException {
return this.getDelegate().getLogWriter();
}
public void setLoginTimeout(
int seconds
) throws SQLException {
this.getDelegate().setLoginTimeout(seconds);
}
public void setLogWriter(
PrintWriter out
) throws SQLException {
this.getDelegate().setLogWriter(out);
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return getClass().getName() + ": " + this.jndiName;
}
/* (non-Javadoc)
* @see java.sql.Wrapper#isWrapperFor(java.lang.Class)
*/
public boolean isWrapperFor(Class iface)
throws SQLException {
return this.getDelegate().isWrapperFor(iface);
}
/* (non-Javadoc)
* @see java.sql.Wrapper#unwrap(java.lang.Class)
*/
public T unwrap(Class arg0)
throws SQLException {
return this.getDelegate().unwrap(arg0);
}
//-----------------------------------------------------------------------
// Since JRE 7
//-----------------------------------------------------------------------
public Logger getParentLogger(
) throws SQLFeatureNotSupportedException {
throw new SQLFeatureNotSupportedException();
}
}