Package javax.persistence
Enum SynchronizationType
- java.lang.Object
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- java.lang.Enum<SynchronizationType>
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- javax.persistence.SynchronizationType
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Comparable<SynchronizationType>
public enum SynchronizationType extends java.lang.Enum<SynchronizationType>
Describes how a persistence context will be synchronized to the database in sync with JTA transactions- Since:
- Java Persistence 2.1
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Enum Constant Summary
Enum Constants Enum Constant Description SYNCHRONIZED
Indicates the persistence context is automatically enlisted in (joined to) the current JTA transaction.UNSYNCHRONIZED
Indicates the persistence context is not enlisted in any JTA transaction unless explicitly joined to that transaction by invocation of the EntityManagerEntityManager.joinTransaction()
method.
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Constructor Summary
Constructors Modifier Constructor Description private
SynchronizationType()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static SynchronizationType
valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name.static SynchronizationType[]
values()
Returns an array containing the constants of this enum type, in the order they are declared.
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Enum Constant Detail
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SYNCHRONIZED
public static final SynchronizationType SYNCHRONIZED
Indicates the persistence context is automatically enlisted in (joined to) the current JTA transaction.
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UNSYNCHRONIZED
public static final SynchronizationType UNSYNCHRONIZED
Indicates the persistence context is not enlisted in any JTA transaction unless explicitly joined to that transaction by invocation of the EntityManagerEntityManager.joinTransaction()
method. The persistence context remains joined to the transaction until the transaction commits or rolls back. After the transaction commits or rolls back, the persistence context will not be joined to any subsequent transaction unless the joinTransaction method is invoked in the scope of that subsequent transaction. Such a persistence context must not be flushed to the database unless it is joined to a transaction. The application's use of queries with pessimistic locks, bulk update or delete queries, etc. result in the provider throwingTransactionRequiredException
. After the persistence context has been joined to the JTA transaction, these operations are again allowed.
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Method Detail
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values
public static SynchronizationType[] 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 (SynchronizationType c : SynchronizationType.values()) System.out.println(c);
- Returns:
- an array containing the constants of this enum type, in the order they are declared
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valueOf
public static SynchronizationType valueOf(java.lang.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:
java.lang.IllegalArgumentException
- if this enum type has no constant with the specified namejava.lang.NullPointerException
- if the argument is null
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