org.noear.solon.data.tran

Enum TranIsolation

java.lang.Object

java.lang.Enum<TranIsolation>

org.noear.solon.data.tran.TranIsolation

All Implemented Interfaces:

Serializable, Comparable<TranIsolation>

public enum TranIsolation
extends Enum<TranIsolation>

事务隔离级别

Since:

1.0

Author:

noear

Enum Constant Summary

Enum Constants

Enum Constant and Description
read_committed 只读取提交数据：其它事务，只能读取已提交数据
read_uncommitted 脏读：其它事务，可读取未提交数据
repeatable_read 可重复读：保证在同一个事务中多次读取同样数据的结果是一样的。
serializable 可串行化读：要求事务串行化执行，事务只能一个接着一个地执行，不能并发执行
unspecified 未申明（默认）

Field Summary

Fields

Modifier and Type	Field and Description
int	level

Method Summary

Modifier and Type	Method and Description
static TranIsolation	valueOf(String name) Returns the enum constant of this type with the specified name.
static TranIsolation[]	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

unspecified

public static final TranIsolation unspecified

未申明（默认）

read_uncommitted

public static final TranIsolation read_uncommitted

脏读：其它事务，可读取未提交数据

read_committed

public static final TranIsolation read_committed

只读取提交数据：其它事务，只能读取已提交数据

repeatable_read

public static final TranIsolation repeatable_read

可重复读：保证在同一个事务中多次读取同样数据的结果是一样的。可避免脏读、不可重复读的发生

serializable

public static final TranIsolation serializable

可串行化读：要求事务串行化执行，事务只能一个接着一个地执行，不能并发执行

Field Detail

level

public final int level

Method Detail

values

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

Returns:

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

valueOf

public static TranIsolation 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