Enum Isolation

Enum Constant Detail

• DEFAULT

  public static final Isolation DEFAULT

  Use the default isolation level of the underlying datastore. All other levels correspond to the JDBC isolation levels.

  See Also:

  Connection

• 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:

  Connection.TRANSACTION_READ_UNCOMMITTED

• 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:

  Connection.TRANSACTION_READ_COMMITTED

• 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 rereads the row, getting different values the second time (a "non-repeatable read").

  See Also:

  Connection.TRANSACTION_REPEATABLE_READ

• 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 rereads for the same condition, retrieving the additional "phantom" row in the second read.

  See Also:

  Connection.TRANSACTION_SERIALIZABLE

Method Detail

• values

  public static Isolation[] 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 (Isolation c : Isolation.values())
      System.out.println(c);
  

  Returns:

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

• valueOf

  public static Isolation 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

• value

  public int value()