Package org.h2.engine
Enum IsolationLevel
- java.lang.Object
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- java.lang.Enum<IsolationLevel>
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- org.h2.engine.IsolationLevel
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Comparable<IsolationLevel>
public enum IsolationLevel extends java.lang.Enum<IsolationLevel>
Level of isolation.
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Enum Constant Summary
Enum Constants Enum Constant Description READ_COMMITTED
Dirty reads aren't allowed; non-repeatable reads and phantom reads are allowed.READ_UNCOMMITTED
Dirty reads, non-repeatable reads and phantom reads are allowed.REPEATABLE_READ
Dirty reads and non-repeatable reads aren't allowed; phantom reads are allowed.SERIALIZABLE
Dirty reads, non-repeatable reads and phantom reads are'n allowed.SNAPSHOT
Dirty reads, non-repeatable reads and phantom reads are'n allowed.
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Constructor Summary
Constructors Modifier Constructor Description private
IsolationLevel(int jdbc, int lockMode)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
allowNonRepeatableRead()
Returns whether a non-repeatable read phenomena is allowed.static IsolationLevel
fromJdbc(int level)
Returns the isolation level from LOCK_MODE equivalent for PageStore and old versions of H2.static IsolationLevel
fromLockMode(int lockMode)
Returns the isolation level from LOCK_MODE equivalent for PageStore and old versions of H2.static IsolationLevel
fromSql(java.lang.String sql)
Returns the isolation level from its SQL name.int
getJdbc()
Returns the JDBC constant for this isolation level.int
getLockMode()
Returns the LOCK_MODE equivalent for PageStore and old versions of H2.java.lang.String
getSQL()
Returns the SQL representation of this isolation level.static IsolationLevel
valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name.static IsolationLevel[]
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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READ_UNCOMMITTED
public static final IsolationLevel READ_UNCOMMITTED
Dirty reads, non-repeatable reads and phantom reads are allowed.
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READ_COMMITTED
public static final IsolationLevel READ_COMMITTED
Dirty reads aren't allowed; non-repeatable reads and phantom reads are allowed.
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REPEATABLE_READ
public static final IsolationLevel REPEATABLE_READ
Dirty reads and non-repeatable reads aren't allowed; phantom reads are allowed.
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SNAPSHOT
public static final IsolationLevel SNAPSHOT
Dirty reads, non-repeatable reads and phantom reads are'n allowed.
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SERIALIZABLE
public static final IsolationLevel SERIALIZABLE
Dirty reads, non-repeatable reads and phantom reads are'n allowed. Concurrent and serial execution of transactions with this isolation level should have the same effect.
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Method Detail
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values
public static IsolationLevel[] 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 (IsolationLevel c : IsolationLevel.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 IsolationLevel 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 namejava.lang.NullPointerException
- if the argument is null
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fromJdbc
public static IsolationLevel fromJdbc(int level)
Returns the isolation level from LOCK_MODE equivalent for PageStore and old versions of H2.- Parameters:
level
- the LOCK_MODE value- Returns:
- the isolation level
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fromLockMode
public static IsolationLevel fromLockMode(int lockMode)
Returns the isolation level from LOCK_MODE equivalent for PageStore and old versions of H2.- Parameters:
lockMode
- the LOCK_MODE value- Returns:
- the isolation level
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fromSql
public static IsolationLevel fromSql(java.lang.String sql)
Returns the isolation level from its SQL name.- Parameters:
sql
- the SQL name- Returns:
- the isolation level from its SQL name
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getSQL
public java.lang.String getSQL()
Returns the SQL representation of this isolation level.- Returns:
- SQL representation of this isolation level
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getJdbc
public int getJdbc()
Returns the JDBC constant for this isolation level.- Returns:
- the JDBC constant for this isolation level
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getLockMode
public int getLockMode()
Returns the LOCK_MODE equivalent for PageStore and old versions of H2.- Returns:
- the LOCK_MODE equivalent
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allowNonRepeatableRead
public boolean allowNonRepeatableRead()
Returns whether a non-repeatable read phenomena is allowed.- Returns:
- whether a non-repeatable read phenomena is allowed
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