org.prevayler.contrib.facade
Class TransactionType

java.lang.Object
  org.prevayler.contrib.facade.TransactionType

public abstract class TransactionType
extends Object

A "smart" enumerated type enumerating the three kinds of transactions that Prevayler supports plus one that is, effectively, "no transaction". Also includes the transaction type Determiner interface and two of the most basic implementations.

Since:

0_1

Author:

Jay Sachs [jay@contravariant.org], Jacob Kjome [hoju@visi.com]

Nested Class Summary

static interface

TransactionType.Determiner An interface describing a strategy for choosing a TransactionType for a given method.

Field Summary

static TransactionType	NOOP
static TransactionType	QUERY
static TransactionType.Determiner	RETURN_TYPE_DETERMINER A basic transaction type determiner which bases the transaction type on the return type of methods: TRANSACTION for void methods and QUERY otherwise.
static TransactionType.Determiner	SIMPLE_DETERMINER A minimal transaction type determiner which uses no heuristics.
static TransactionType	TRANSACTION
static TransactionType	TRANSACTION_WITH_QUERY

Method Summary

abstract Object	execute(Prevayler p_prevayler, Method p_method, Object[] p_args, TransactionHint p_hint)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

SIMPLE_DETERMINER

public static final TransactionType.Determiner SIMPLE_DETERMINER

A minimal transaction type determiner which uses no heuristics. It always returns a transaction type of TRANSACTION_WITH_QUERY.

RETURN_TYPE_DETERMINER

public static final TransactionType.Determiner RETURN_TYPE_DETERMINER

A basic transaction type determiner which bases the transaction type on the return type of methods: TRANSACTION for void methods and QUERY otherwise.

QUERY

public static final TransactionType QUERY

TRANSACTION_WITH_QUERY

public static final TransactionType TRANSACTION_WITH_QUERY

TRANSACTION

public static final TransactionType TRANSACTION

NOOP

public static final TransactionType NOOP

Since:

0_2

Method Detail

execute

public abstract Object execute(Prevayler p_prevayler,
                               Method p_method,
                               Object[] p_args,
                               TransactionHint p_hint)
                        throws Exception

Throws:

Exception

Since:

0_2

toString

public String toString()

Overrides:

toString in class Object