Package org.mariadb.jdbc
Enum TransactionIsolation
- java.lang.Object
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- java.lang.Enum<TransactionIsolation>
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- org.mariadb.jdbc.TransactionIsolation
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- All Implemented Interfaces:
Serializable
,Comparable<TransactionIsolation>
public enum TransactionIsolation extends Enum<TransactionIsolation>
Transaction isolation enumeration
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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.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static TransactionIsolation
from(String value)
Get TransactionIsolation from valueint
getLevel()
Get transaction isolation levelString
getValue()
Get transaction isolation commandstatic 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.
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Enum Constant Detail
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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").
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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.
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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.
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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.
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Method Detail
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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
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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 nameNullPointerException
- if the argument is null
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getValue
public String getValue()
Get transaction isolation command- Returns:
- transaction isolation command
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getLevel
public int getLevel()
Get transaction isolation level- Returns:
- transaction isolation level
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from
public static TransactionIsolation from(String value)
Get TransactionIsolation from value- Parameters:
value
- value- Returns:
- transaction isolation
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