Enum TransactionIsolation

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<TransactionIsolation>

    public enum TransactionIsolation
    extends java.lang.Enum<TransactionIsolation>
    Transaction isolation enumeration
    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      READ_COMMITTED
      dirty reads are prevented; non-repeatable reads and phantom reads can occur.
      READ_UNCOMMITTED
      dirty reads, non-repeatable reads and phantom reads can occur.
      REPEATABLE_READ
      dirty reads and non-repeatable reads are prevented; phantom reads can occur.
      SERIALIZABLE
      dirty reads, non-repeatable reads and phantom reads are prevented.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private int level  
      private java.lang.String value  
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private TransactionIsolation​(java.lang.String value, int level)  
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static TransactionIsolation from​(java.lang.String value)
      Get TransactionIsolation from value
      int getLevel()
      Get transaction isolation level
      java.lang.String getValue()
      Get transaction isolation command
      static TransactionIsolation valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static TransactionIsolation[] 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

      • REPEATABLE_READ

        public static final TransactionIsolation REPEATABLE_READ
        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").
      • READ_COMMITTED

        public static final TransactionIsolation READ_COMMITTED
        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.
      • READ_UNCOMMITTED

        public static final TransactionIsolation READ_UNCOMMITTED
        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.
      • SERIALIZABLE

        public static final TransactionIsolation SERIALIZABLE
        dirty reads, non-repeatable reads and phantom reads are prevented. This level includes the prohibitions in TRANSACTION_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.
    • Field Detail

      • value

        private final java.lang.String value
      • level

        private final int level
    • Constructor Detail

      • TransactionIsolation

        private TransactionIsolation​(java.lang.String value,
                                     int level)
    • Method Detail

      • values

        public static TransactionIsolation[] 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 (TransactionIsolation c : TransactionIsolation.values())
            System.out.println(c);
        
        Returns:
        an array containing the constants of this enum type, in the order they are declared
      • valueOf

        public static TransactionIsolation 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
      • from

        public static TransactionIsolation from​(java.lang.String value)
        Get TransactionIsolation from value
        Parameters:
        value - value
        Returns:
        transaction isolation
      • getValue

        public java.lang.String getValue()
        Get transaction isolation command
        Returns:
        transaction isolation command
      • getLevel

        public int getLevel()
        Get transaction isolation level
        Returns:
        transaction isolation level