Package org.mariadb.jdbc
Enum Class TransactionIsolation
- All Implemented Interfaces:
Serializable
,Comparable<TransactionIsolation>
,Constable
Transaction isolation enumeration
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Nested Class Summary
Nested classes/interfaces inherited from class java.lang.Enum
Enum.EnumDesc<E extends Enum<E>>
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Enum Constant Summary
Enum ConstantsEnum ConstantDescriptiondirty reads are prevented; non-repeatable reads and phantom reads can occur.dirty reads, non-repeatable reads and phantom reads can occur.dirty reads and non-repeatable reads are prevented; phantom reads can occur.dirty reads, non-repeatable reads and phantom reads are prevented. -
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic TransactionIsolation
Get TransactionIsolation from valueint
getLevel()
Get transaction isolation levelgetValue()
Get transaction isolation commandstatic TransactionIsolation
Returns the enum constant of this class with the specified name.static TransactionIsolation[]
values()
Returns an array containing the constants of this enum class, in the order they are declared.
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Enum Constant Details
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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
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
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
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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Field Details
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value
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level
private final int level
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Constructor Details
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TransactionIsolation
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Method Details
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values
Returns an array containing the constants of this enum class, in the order they are declared.- Returns:
- an array containing the constants of this enum class, in the order they are declared
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valueOf
Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified nameNullPointerException
- if the argument is null
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from
Get TransactionIsolation from value- Parameters:
value
- value- Returns:
- transaction isolation
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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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