org.apache.mahout.cf.taste.impl.common.jdbc

Class AbstractJDBCComponent

java.lang.Object

org.apache.mahout.cf.taste.impl.common.jdbc.AbstractJDBCComponent

public abstract class AbstractJDBCComponent
extends Object

A helper class with common elements for several JDBC-related components.

Field Summary

Fields

Modifier and Type	Field and Description
protected static String	DEFAULT_DATASOURCE_NAME

Constructor Summary

Constructors

Constructor and Description
AbstractJDBCComponent()

Method Summary

Modifier and Type	Method and Description
protected static void	checkNotNullAndLog(String argName, Object value)
protected static void	checkNotNullAndLog(String argName, Object[] values)
protected int	getFetchSize()
static DataSource	lookupDataSource(String dataSourceName) Looks up a DataSource by name from JNDI.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_DATASOURCE_NAME

protected static final String DEFAULT_DATASOURCE_NAME

See Also:

Constant Field Values

Constructor Detail

AbstractJDBCComponent

public AbstractJDBCComponent()

Method Detail

checkNotNullAndLog

protected static void checkNotNullAndLog(String argName,
                                         Object value)

checkNotNullAndLog

protected static void checkNotNullAndLog(String argName,
                                         Object[] values)

lookupDataSource

public static DataSource lookupDataSource(String dataSourceName)
                                   throws TasteException

Looks up a DataSource by name from JNDI. "java:comp/env/" is prepended to the argument before looking up the name in JNDI.

Parameters:

dataSourceName - JNDI name where a DataSource is bound (e.g. "jdbc/taste")

Returns:

DataSource under that JNDI name

Throws:

TasteException - if a JNDI error occurs

getFetchSize

protected int getFetchSize()