Package io.micronaut.transaction

Enum TransactionDefinition.Isolation

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      DEFAULT
      Use the default isolation level of the underlying datastore.
      READ_COMMITTED
      Indicates that dirty reads are prevented; non-repeatable reads and phantom reads can occur.
      READ_UNCOMMITTED
      Indicates that dirty reads, non-repeatable reads and phantom reads can occur.
      REPEATABLE_READ
      Indicates that dirty reads and non-repeatable reads are prevented; phantom reads can occur.
      SERIALIZABLE
      Indicates that dirty reads, non-repeatable reads and phantom reads are prevented.

    • Enum Constant Detail

      • DEFAULT

        public static final TransactionDefinition.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 TransactionDefinition.Isolation READ_UNCOMMITTED
        Indicates 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 TransactionDefinition.Isolation READ_COMMITTED
        Indicates 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 TransactionDefinition.Isolation REPEATABLE_READ
        Indicates 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:
        Connection.TRANSACTION_REPEATABLE_READ

      • SERIALIZABLE

        public static final TransactionDefinition.Isolation SERIALIZABLE
        Indicates that dirty reads, non-repeatable reads and phantom reads are prevented.

        This level includes the prohibitions in 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:
        Connection.TRANSACTION_SERIALIZABLE

    • Method Detail

      • values

        public static TransactionDefinition.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 (TransactionDefinition.Isolation c : TransactionDefinition.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 TransactionDefinition.Isolation 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 name
        java.lang.NullPointerException - if the argument is null

      • getCode

        public int getCode()
        Returns:
        The isolation code

      • valueOf

        public static TransactionDefinition.Isolation valueOf​(int code)
        Isolation level for the given code.
        Parameters:
        code - The code
        Returns:
        The isolation