Enum Class Isolation

java.lang.Object
java.lang.Enum<Isolation>
org.springframework.transaction.annotation.Isolation
All Implemented Interfaces:
Serializable, Comparable<Isolation>, Constable

public enum Isolation extends Enum<Isolation>
Enumeration that represents transaction isolation levels for use with the @Transactional annotation, corresponding to the TransactionDefinition interface.
Since:
1.2
Author:
Colin Sampaleanu, Juergen Hoeller
  • Enum Constant Details

    • DEFAULT

      public static final Isolation DEFAULT
      Use the default isolation level of the underlying data store.

      All other levels correspond to the JDBC isolation levels.

      See Also:
    • READ_UNCOMMITTED

      public static final Isolation READ_UNCOMMITTED
      A constant indicating that dirty reads, non-repeatable reads, and phantom reads can occur.

      This level allows a row changed by one transaction to be read by another transaction before any changes in that row have been committed (a "dirty read"). If any of the changes are rolled back, the second transaction will have retrieved an invalid row.

      See Also:
    • READ_COMMITTED

      public static final Isolation READ_COMMITTED
      A constant indicating that dirty reads are prevented; non-repeatable reads and phantom reads can occur.

      This level only prohibits a transaction from reading a row with uncommitted changes in it.

      See Also:
    • REPEATABLE_READ

      public static final Isolation REPEATABLE_READ
      A constant indicating that dirty reads and non-repeatable reads are prevented; phantom reads can occur.

      This level prohibits a transaction from reading a row with uncommitted changes in it, and it also prohibits the situation where one transaction reads a row, a second transaction alters the row, and the first transaction re-reads the row, getting different values the second time (a "non-repeatable read").

      See Also:
    • SERIALIZABLE

      public static final Isolation SERIALIZABLE
      A constant indicating that dirty reads, non-repeatable reads, and phantom reads are prevented.

      This level includes the prohibitions in #ISOLATION_REPEATABLE_READ and further prohibits the situation where one transaction reads all rows that satisfy a WHERE condition, a second transaction inserts a row that satisfies that WHERE condition, and the first transaction re-reads for the same condition, retrieving the additional "phantom" row in the second read.

      See Also:
  • Method Details

    • values

      public static Isolation[] values()
      Returns an array containing the constants of this enum class, in the order they are declared.
      Returns:
      an array containing the constants of this enum class, in the order they are declared
    • valueOf

      public static Isolation valueOf(String name)
      Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name
      NullPointerException - if the argument is null
    • value

      public int value()