com.bankframe.ei.txnhandler.hostcache
Class DataSourceWrapper

java.lang.Object
  com.bankframe.ei.txnhandler.hostcache.Retry
      com.bankframe.ei.txnhandler.hostcache.DataSourceWrapper

public class DataSourceWrapper
extends Retry

This class is a wrapper class used for connecting to a database. Depending on the Application servers differnet methods are required to connect to the database.

Constructor Summary

DataSourceWrapper(Hashtable env, String dataSourceName)
Creates new DataSourceWrapper

Method Summary

void	close() This closes the member's connection.
Statement	createStatement() This method creates a statement from the DataSource.
static Connection	getConnection(Hashtable env, String dataSourceName) A static method for getting a JDBC connection from a DataSource.
DatabaseMetaData	getMetaData() This method gets the connection's meta data.
void	open() This method opens the connection.
PreparedStatement	prepareStatement(String sql) This method creates a prepared statement.
PreparedStatement	prepareStatement(String sql, int resultSetType, int resultSetConcurrency) This method creates a prepared statement.
boolean	runRetry() This is run on every retry.

Methods inherited from class com.bankframe.ei.txnhandler.hostcache.Retry

retry

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataSourceWrapper

public DataSourceWrapper(Hashtable env,
                         String dataSourceName)
                  throws SQLException,
                         NamingException

Creates new DataSourceWrapper

Parameters:

env - The JNDI env.

dataSourceName - The DataSource JNDI name.

Throws:

SQLException - If an error occurs during a database operation.

NamingException - If there was a problem looking up the DataSource.

Method Detail

createStatement

public Statement createStatement()
                          throws SQLException,
                                 NamingException

This method creates a statement from the DataSource.

Returns:

The created statement.

Throws:

SQLException - If an exception occurred in getting the statement.

NamingException - If an exception occurred in opening the connection.

prepareStatement

public PreparedStatement prepareStatement(String sql)
                                   throws SQLException,
                                          NamingException

This method creates a prepared statement.

Parameters:

sql - The statement to compile.

Returns:

The compiled prepared statement.

Throws:

SQLException - If an exception occurred in getting the statement.

NamingException - If an error occurred in finding the DataSource in the JNDI tree.

prepareStatement

public PreparedStatement prepareStatement(String sql,
                                          int resultSetType,
                                          int resultSetConcurrency)
                                   throws SQLException,
                                          NamingException

This method creates a prepared statement.

Parameters:

sql - The SQL to compile.

resultSetType - Please see the Connection.prepareStatement() javadoc for more on this argument.

resultSetConcurrency - Please see the Connection.prepareStatement() javadoc for more on this argument.

Returns:

The compiled prepared statement.

Throws:

SQLException - If an exception occurred in getting the statement.

NamingException - If an error occurred in finding the DataSource in the JNDI tree.

getMetaData

public DatabaseMetaData getMetaData()
                             throws NamingException,
                                    SQLException

This method gets the connection's meta data.

Returns:

The connection's meta data.

Throws:

NamingException - If an error occurred in finding the DataSource in the JNDI tree.

SQLException - If an exception occurred in getting the meta data.

open

public void open()
          throws NamingException,
                 SQLException

This method opens the connection.

Throws:

NamingException - If an error occurred in finding the DataSource in the JNDI tree.

SQLException - If an error occurred in opening the connection.

runRetry

public boolean runRetry()

This is run on every retry.

Specified by:

runRetry in class Retry

Returns:

Returns the success of the retry.

getConnection

public static Connection getConnection(Hashtable env,
                                       String dataSourceName)
                                throws NamingException,
                                       SQLException

A static method for getting a JDBC connection from a DataSource.

Parameters:

env - The JNDI environment for the InitialContext. If this is null it is assumed that new InitialContext() will work.

dataSourceName - The JNDI name of the DataSource.

Returns:

Returns the connection.

Throws:

NamingException - If a error occurred in looking up the DataSource name.

SQLException - If an error occurred in getting the connection.

close

public void close()
           throws SQLException

This closes the member's connection.

Throws:

SQLException - If an error occurred in opening the connection.