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package com.sun.gjc.spi;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.SQLException;
import javax.resource.spi.ManagedConnectionFactory;
import javax.resource.spi.ConnectionManager;
import javax.resource.ResourceException;
import javax.naming.Reference;
import com.sun.gjc.spi.ConnectionHolder.ConnectionType;
import com.sun.logging.*;
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.enterprise.connectors.ConnectionManagerImpl;
import com.sun.enterprise.connectors.ConnectorConstants;
/**
* Holds the <code>java.sql.Connection</code> object, which is to be
* passed to the application program.
*
* @version 1.0, 02/07/31
* @author Binod P.G
*/
public class DataSource implements javax.sql.DataSource, java.io.Serializable,
com.sun.appserv.jdbc.DataSource, javax.resource.Referenceable{
private ManagedConnectionFactory mcf;
private ConnectionManager cm;
private int loginTimeout;
private PrintWriter logWriter;
private String description;
private Reference reference;
private ConnectionType conType_;
private static Logger _logger;
static {
_logger = LogDomains.getLogger( LogDomains.RSR_LOGGER );
}
private boolean debug = false;
/**
* Constructs <code>DataSource</code> object. This is created by the
* <code>ManagedConnectionFactory</code> object.
*
* @param mcf <code>ManagedConnectionFactory</code> object
* creating this object.
* @param cm <code>ConnectionManager</code> object either associated
* with Application server or Resource Adapter.
*/
public DataSource (ManagedConnectionFactory mcf, ConnectionManager cm) {
this.mcf = mcf;
if (cm == null) {
this.cm = (ConnectionManager) new com.sun.gjc.spi.ConnectionManager();
} else {
this.cm = cm;
conType_ = findConnectionType();
}
}
/**
* Retrieves the <code> Connection </code> object.
*
* @return <code> Connection </code> object.
* @throws SQLException In case of an error.
*/
public Connection getConnection() throws SQLException {
try {
ConnectionHolder con = (ConnectionHolder)
cm.allocateConnection( mcf, null );
setConnectionType( con );
return (Connection) con;
} catch (ResourceException re) {
_logger.log(Level.WARNING, "jdbc.exc_get_conn", re.getMessage());
throw new SQLException (re.getMessage());
}
}
/**
* Retrieves the <code> Connection </code> object.
*
* @param user User name for the Connection.
* @param pwd Password for the Connection.
* @return <code> Connection </code> object.
* @throws SQLException In case of an error.
*/
public Connection getConnection(String user, String pwd) throws SQLException {
try {
ConnectionRequestInfo info = new ConnectionRequestInfo (user, pwd);
ConnectionHolder con = (ConnectionHolder)
cm.allocateConnection(mcf,info);
setConnectionType( con );
return (Connection) con;
} catch (ResourceException re) {
_logger.log(Level.WARNING, "jdbc.exc_get_conn", re.getMessage());
throw new SQLException (re.getMessage());
}
}
/**
* Retrieves the actual SQLConnection from the Connection wrapper
* implementation of SunONE application server. If an actual connection is
* supplied as argument, then it will be just returned.
*
* @param con Connection obtained from <code>Datasource.getConnection()</code>
* @return <code>java.sql.Connection</code> implementation of the driver.
* @throws <code>java.sql.SQLException</code> If connection cannot be obtained.
*/
public Connection getConnection(Connection con) throws SQLException {
Connection driverCon = con;
if (con instanceof com.sun.gjc.spi.ConnectionHolder) {
driverCon = ((com.sun.gjc.spi.ConnectionHolder) con).getConnection();
}
return driverCon;
}
/**
* Gets a connection that is not in the scope of any transaction. This
* can be used to save performance overhead incurred on enlisting/delisting
* each connection got, irrespective of whether its required or not.
* Note here that this meethod does not fit in the connector contract
* per se.
*
* @return <code>java.sql.Connection</code>
* @throws <code>java.sql.SQLException</code> If connection cannot be obtained
*/
public Connection getNonTxConnection() throws SQLException {
try {
ConnectionHolder con = (ConnectionHolder)
((com.sun.enterprise.connectors.ConnectionManagerImpl)
cm).allocateNonTxConnection(mcf, null);
setConnectionType( con, true );
return (Connection) con;
} catch( ResourceException re ) {
_logger.log(Level.WARNING, "jdbc.exc_get_conn", re.getMessage());
throw new SQLException( re.getMessage() );
}
}
/**
* Gets a connection that is not in the scope of any transaction. This
* can be used to save performance overhead incurred on enlisting/delisting
* each connection got, irrespective of whether its required or not.
* Note here that this meethod does not fit in the connector contract
* per se.
*
* @param user User name for authenticating the connection
* @param password Password for authenticating the connection
* @return <code>java.sql.Connection</code>
* @throws <code>java.sql.SQLException</code> If connection cannot be obtained
*/
public Connection getNonTxConnection(String user, String password) throws SQLException {
try {
ConnectionRequestInfo cxReqInfo = new ConnectionRequestInfo(user, password);
ConnectionHolder con = (ConnectionHolder)
((com.sun.enterprise.connectors.ConnectionManagerImpl)
cm).allocateNonTxConnection( mcf, cxReqInfo);
setConnectionType( con, true );
return (Connection) con;
} catch( ResourceException re ) {
_logger.log(Level.WARNING, "jdbc.exc_get_conn", re.getMessage());
throw new SQLException( re.getMessage() );
}
}
/**
* Get the login timeout
*
* @return login timeout.
* @throws SQLException If a database error occurs.
*/
public int getLoginTimeout() throws SQLException{
return loginTimeout;
}
/**
* Set the login timeout
*
* @param loginTimeout Login timeout.
* @throws SQLException If a database error occurs.
*/
public void setLoginTimeout(int loginTimeout) throws SQLException{
this.loginTimeout = loginTimeout;
}
/**
* Get the logwriter object.
*
* @return <code> PrintWriter </code> object.
* @throws SQLException If a database error occurs.
*/
public PrintWriter getLogWriter() throws SQLException{
return logWriter;
}
/**
* Set the logwriter on this object.
*
* @param <code>PrintWriter</code> object.
* @throws SQLException If a database error occurs.
*/
public void setLogWriter(PrintWriter logWriter) throws SQLException{
this.logWriter = logWriter;
}
/**
* Retrieves the description.
*
* @return Description about the DataSource.
*/
public String getDescription() {
return description;
}
/**
* Set the description.
*
* @param description Description about the DataSource.
*/
public void setDescription(String description) {
this.description = description;
}
/**
* Get the reference.
*
* @return <code>Reference</code>object.
*/
public Reference getReference() {
return reference;
}
/**
* Get the reference.
*
* @param reference <code>Reference</code> object.
*/
public void setReference(Reference reference) {
this.reference = reference;
}
private ConnectionType findConnectionType() {
ConnectionType cmType = ConnectionType.STANDARD;
if ( cm instanceof javax.resource.spi.LazyAssociatableConnectionManager ) {
if (! ((com.sun.enterprise.connectors.ConnectionManagerImpl)cm).
getJndiName().endsWith( ConnectorConstants.PM_JNDI_SUFFIX ) ) {
cmType = ConnectionType.LAZY_ASSOCIATABLE;
}
} else if ( cm instanceof
javax.resource.spi.LazyEnlistableConnectionManager ) {
if (! ((com.sun.enterprise.connectors.ConnectionManagerImpl)cm).
getJndiName().endsWith( ConnectorConstants.PM_JNDI_SUFFIX) &&
! ((com.sun.enterprise.connectors.ConnectionManagerImpl)cm).
getJndiName().endsWith( ConnectorConstants.NON_TX_JNDI_SUFFIX)) {
cmType = ConnectionType.LAZY_ENLISTABLE;
}
}
return cmType;
}
private void setConnectionType( ConnectionHolder con ) {
this.setConnectionType( con, false);
}
private void setConnectionType( ConnectionHolder con, boolean isNonTx ) {
con.setConnectionType( conType_ );
if ( conType_ == ConnectionType.LAZY_ASSOCIATABLE ) {
con.setLazyAssociatableConnectionManager(
(javax.resource.spi.LazyAssociatableConnectionManager) cm);
} else if (conType_ == ConnectionType.LAZY_ENLISTABLE) {
if ( isNonTx ) {
//if this is a getNonTxConnection call on the DataSource, we
//should not LazyEnlist
con.setConnectionType( ConnectionType.STANDARD );
} else {
con.setLazyEnlistableConnectionManager(
(javax.resource.spi.LazyEnlistableConnectionManager) cm );
}
}
}
/**
* API to mark a connection as bad. If the application can determine that the connection
* is bad, using this api, it can notify the resource-adapter which inturn will notify the
* connection-pool. Connection-pool will drop and create a new connection.
* eg:
* <pre>
com.sun.appserv.jdbc.DataSource ds=
(com.sun.appserv.jdbc.DataSource)context.lookup("dataSource");
Connection con = ds.getConnection();
Statement stmt = null;
try{
stmt = con.createStatement();
stmt.executeUpdate("Update");
}catch(BadConnectionException e){
dataSource.markConnectionAsBad(con) //marking it as bad for removal
}finally{
stmt.close();
con.close(); //Connection will be destroyed while close or Tx completion
}
* </pre>
* @param conn <code>java.sql.Connection</code>
*/
public void markConnectionAsBad(Connection conn){
if (conn instanceof ConnectionHolder){
ConnectionHolder userConn = ((ConnectionHolder)conn);
userConn.getManagedConnection().markForRemoval(true);
}
}
}