com.xenonsoft.bridgetown.aop.transaction
Class TransactionIsolationEnum

java.lang.Object
  org.apache.commons.lang.enum.Enum
      org.apache.commons.lang.enum.ValuedEnum
          com.xenonsoft.bridgetown.aop.transaction.TransactionIsolationEnum

All Implemented Interfaces:

java.lang.Comparable, java.io.Serializable

public final class TransactionIsolationEnum

extends org.apache.commons.lang.enum.ValuedEnum

Transaction Isolation Level from the java.sql.DatabaseMetaData interface and java.sql.Connection type.

• Dirty Read - Allow dirty read when a transaction is allowed to read data affected by another transaction before the other transaction commits.
• Non-repeatable Read - A non-repeatable read occurs when a transaction attempts to select the same row twice, but a second tranaction meanwhile has modified or deleted the row in the interim.
• Phantom Read - A phantom read occurs when a transaction reads all rows that meet a particular cirteria, but a second transaction inserts a brand new row meets the same criteria.

Version:

$Id: TransactionIsolationEnum.java,v 1.3 2005/02/23 01:28:13 peter_pilgrim Exp $

Author:

Peter Pilgrim, 20-Oct-2004 19:57:43

See Also:

Connection.TRANSACTION_NONE, Connection.TRANSACTION_READ_UNCOMMITTED, Connection.TRANSACTION_READ_COMMITTED, Connection.TRANSACTION_REPEATABLE_READ, Connection.TRANSACTION_SERIALIZABLE, Serialized Form

Field Summary

static TransactionIsolationEnum	TRANSACTION_DEFAULT This is a transaction level which denotes accepts whatever the database or resource controller normally initialises to when the object is first retrieved.
static TransactionIsolationEnum	TRANSACTION_NONE No transaction level is supported.
static TransactionIsolationEnum	TRANSACTION_READ_COMMITTED A transaction isolation that prevents dirty reads.
static TransactionIsolationEnum	TRANSACTION_READ_UNCOMMITTED The most lenient transaction level, because it essential does nothing and therefore performs the best.
static TransactionIsolationEnum	TRANSACTION_REPEATABLE_READ A transaction isolation that prevents dirty reads and non-repeatable reads.
static TransactionIsolationEnum	TRANSACTION_SERIALIZABLE A transaction isolation that prevents dirty reads, non-repeatable reads and phantom reads.

Fields inherited from class org.apache.commons.lang.enum.Enum

iToString

Method Summary

static TransactionIsolationEnum	getEnum(int transIso) Convert an SQL transaction isolation type into an enumerated type.
static TransactionIsolationEnum	getEnum(java.lang.String textValue) Returns the enumeration that matches the text value
static java.util.List	getEnumList() Return a list collection of registered enumerations for this class type
static java.util.Map	getEnumMap() Return a map collection of registered enumerations for this class type
static java.util.Iterator	iterator() Return an iterator that can traverse the collection of registered enumerations

Methods inherited from class org.apache.commons.lang.enum.ValuedEnum

compareTo, getEnum, getValue, toString

Methods inherited from class org.apache.commons.lang.enum.Enum

equals, getEnum, getEnumClass, getEnumList, getEnumMap, getName, hashCode, iterator, readResolve

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

TRANSACTION_DEFAULT

public static final TransactionIsolationEnum TRANSACTION_DEFAULT

This is a transaction level which denotes accepts whatever the database or resource controller normally initialises to when the object is first retrieved.

TRANSACTION_READ_UNCOMMITTED

public static final TransactionIsolationEnum TRANSACTION_READ_UNCOMMITTED

The most lenient transaction level, because it essential does nothing and therefore performs the best. With this transaction level dirty reads, non-repeatable reads, and phantom reads can occur.

TRANSACTION_READ_COMMITTED

public static final TransactionIsolationEnum TRANSACTION_READ_COMMITTED

A transaction isolation that prevents dirty reads.

TRANSACTION_REPEATABLE_READ

public static final TransactionIsolationEnum TRANSACTION_REPEATABLE_READ

A transaction isolation that prevents dirty reads and non-repeatable reads.

TRANSACTION_SERIALIZABLE

public static final TransactionIsolationEnum TRANSACTION_SERIALIZABLE

A transaction isolation that prevents dirty reads, non-repeatable reads and phantom reads.

TRANSACTION_NONE

public static final TransactionIsolationEnum TRANSACTION_NONE

No transaction level is supported.

Method Detail

getEnum

public static TransactionIsolationEnum getEnum(java.lang.String textValue)

Returns the enumeration that matches the text value

Parameters:

textValue -

Returns:

the enumeration

getEnum

public static TransactionIsolationEnum getEnum(int transIso)

Convert an SQL transaction isolation type into an enumerated type.

Parameters:

transIso - the transaction isolation

Returns:

getEnumMap

public static java.util.Map getEnumMap()

Return a map collection of registered enumerations for this class type

Returns:

the map collection

getEnumList

public static java.util.List getEnumList()

Return a list collection of registered enumerations for this class type

Returns:

the list collection

iterator

public static java.util.Iterator iterator()

Return an iterator that can traverse the collection of registered enumerations

Returns:

the iterator