Enum TransactionIsolation

java.lang.Object
java.lang.Enum<TransactionIsolation>
io.vertx.jdbcclient.TransactionIsolation
All Implemented Interfaces:
Serializable, Comparable<TransactionIsolation>
public enum TransactionIsolation extends Enum<TransactionIsolation>
Represents a Transaction Isolation Level
Author:
Paulo Lopes

  • Enum Constant Summary

    Enum Constants
    Enum Constant
    Description
    NONE
    For engines that support it, none isolation means that each statement would essentially be its own transaction.
    READ_COMMITTED
    Specifies that shared locks are held while the data is being read to avoid dirty reads, but the data can be changed before the end of the transaction, resulting in nonrepeatable reads or phantom data.
    READ_UNCOMMITTED
    Implements dirty read, or isolation level 0 locking, which means that no shared locks are issued and no exclusive locks are honored.
    REPEATABLE_READ
    Locks are placed on all data that is used in a query, preventing other users from updating the data, but new phantom rows can be inserted into the data set by another user and are included in later reads in the current transaction.
    SERIALIZABLE
    Places a range lock on the data set, preventing other users from updating or inserting rows into the data set until the transaction is complete.

  • Method Summary

    Modifier and Type
    Method
    Description
    static TransactionIsolation
    from(int level)
     
    static TransactionIsolation
    from(String level)
     
    int
    getType()
     
    static TransactionIsolation
    valueOf(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 Enum

    clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

    Methods inherited from class Object

    getClass, notify, notifyAll, wait, wait, wait

  • Enum Constant Details

    • READ_UNCOMMITTED

      public static final TransactionIsolation READ_UNCOMMITTED
      Implements dirty read, or isolation level 0 locking, which means that no shared locks are issued and no exclusive locks are honored. When this option is set, it is possible to read uncommitted or dirty data; values in the data can be changed and rows can appear or disappear in the data set before the end of the transaction. This is the least restrictive of the four isolation levels.

    • READ_COMMITTED

      public static final TransactionIsolation READ_COMMITTED
      Specifies that shared locks are held while the data is being read to avoid dirty reads, but the data can be changed before the end of the transaction, resulting in nonrepeatable reads or phantom data.

    • REPEATABLE_READ

      public static final TransactionIsolation REPEATABLE_READ
      Locks are placed on all data that is used in a query, preventing other users from updating the data, but new phantom rows can be inserted into the data set by another user and are included in later reads in the current transaction. Because concurrency is lower than the default isolation level, use this option only when necessary.

    • SERIALIZABLE

      public static final TransactionIsolation SERIALIZABLE
      Places a range lock on the data set, preventing other users from updating or inserting rows into the data set until the transaction is complete. This is the most restrictive of the four isolation levels. Because concurrency is lower, use this option only when necessary.

    • NONE

      public static final TransactionIsolation NONE
      For engines that support it, none isolation means that each statement would essentially be its own transaction.

  • Method Details

    • values

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

    • valueOf

      public static TransactionIsolation 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

    • getType

      public int getType()

    • from

      public static TransactionIsolation from(int level)

    • from

      public static TransactionIsolation from(String level)