io.daobab.transaction

Enum Propagation

java.lang.Object

java.lang.Enum<Propagation>

io.daobab.transaction.Propagation

All Implemented Interfaces:

Serializable, Comparable<Propagation>

public enum Propagation
extends Enum<Propagation>

Enum Constant Summary

Enum Constants

Enum Constant and Description
MANDATORY Support a current transaction, throw an exception if none exists.
NESTED Execute within a nested transaction if a current transaction exists, behave like PROPAGATION_REQUIRED else.
NEVER Execute non-transactionally, throw an exception if a transaction exists.
NOT_SUPPORTED Execute non-transactionally, suspend the current transaction if one exists.
REQUIRED Support a current transaction, create a new one if none exists.
REQUIRED_NEW Create a new transaction, suspend the current transaction if one exists.
SUPPORTS Support a current transaction, execute non-transactionally if none exists.

Method Summary

Modifier and Type	Method and Description
TransactionIndicator	mayBeProceeded(Target target)
static Propagation	valueOf(String name) Returns the enum constant of this type with the specified name.
static Propagation[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

MANDATORY

public static final Propagation MANDATORY

Support a current transaction, throw an exception if none exists. Does not start a new Transaction, just checks whether a transaction is active

NESTED

public static final Propagation NESTED

Execute within a nested transaction if a current transaction exists, behave like PROPAGATION_REQUIRED else.

Start a nested transaction if a transaction exists, start a new transaction otherwise.

NEVER

public static final Propagation NEVER

Execute non-transactionally, throw an exception if a transaction exists.

Does not start a transaction. Fails if a transaction is present.

NOT_SUPPORTED

public static final Propagation NOT_SUPPORTED

Execute non-transactionally, suspend the current transaction if one exists.

Does not start a transaction. Suspends any existing transaction.

REQUIRED

public static final Propagation REQUIRED

Support a current transaction, create a new one if none exists.

If a transaction exists, use that, if not, create a new one. In 95% of cases, this is what you need.

REQUIRED_NEW

public static final Propagation REQUIRED_NEW

Create a new transaction, suspend the current transaction if one exists.

Always creates a new transaction, no matter if an existing transaction is present. If there is, it will be suspended for the duration of this method execution.

SUPPORTS

public static final Propagation SUPPORTS

Support a current transaction, execute non-transactionally if none exists.

Can use a transaction if one is present, but doesn't need one (and won't start a new one either)

Method Detail

values

public static Propagation[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Propagation c : Propagation.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static Propagation valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

mayBeProceeded

public TransactionIndicator mayBeProceeded(Target target)