co.cask.hydrator.plugin

Class DBUtils

java.lang.Object

co.cask.hydrator.plugin.DBUtils

public final class DBUtils
extends Object

Utility methods for Database plugins shared by Database plugins.

Method Summary

Methods

Modifier and Type	Method and Description
static void	cleanup(Class<? extends Driver> driverClass) Performs any Database related cleanup
static void	deregisterAllDrivers(Class<? extends Driver> driverClass) De-register all SQL drivers that are associated with the class
static DriverCleanup	ensureJDBCDriverIsAvailable(Class<? extends Driver> jdbcDriverClass, String connectionString, String jdbcPluginType, String jdbcPluginName) Ensures that the JDBC Driver specified in configuration is available and can be loaded.
static List<co.cask.cdap.api.data.schema.Schema.Field>	getSchemaFields(ResultSet resultSet) Given the result set, get the metadata of the result set and return list of Schema.Field, where name of the field is same as column name and type of the field is obtained using getType(int)

Methods inherited from class java.lang.Object

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

Method Detail

cleanup

public static void cleanup(Class<? extends Driver> driverClass)

Performs any Database related cleanup

Parameters:

driverClass - the JDBC driver class

ensureJDBCDriverIsAvailable

public static DriverCleanup ensureJDBCDriverIsAvailable(Class<? extends Driver> jdbcDriverClass,
                                        String connectionString,
                                        String jdbcPluginType,
                                        String jdbcPluginName)
                                                 throws IllegalAccessException,
                                                        InstantiationException,
                                                        SQLException

Ensures that the JDBC Driver specified in configuration is available and can be loaded. Also registers it with DriverManager if it is not already registered.

Throws:

IllegalAccessException

InstantiationException

SQLException

getSchemaFields

public static List<co.cask.cdap.api.data.schema.Schema.Field> getSchemaFields(ResultSet resultSet)
                                                                       throws SQLException

Given the result set, get the metadata of the result set and return list of Schema.Field, where name of the field is same as column name and type of the field is obtained using getType(int)

Parameters:

resultSet - result set of executed query

Returns:

list of schema fields

Throws:

SQLException

deregisterAllDrivers

public static void deregisterAllDrivers(Class<? extends Driver> driverClass)
                                 throws NoSuchFieldException,
                                        IllegalAccessException,
                                        ClassNotFoundException

De-register all SQL drivers that are associated with the class

Throws:

NoSuchFieldException

IllegalAccessException

ClassNotFoundException