Package org.multiverse.api
Enum LockMode
- java.lang.Object
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- java.lang.Enum<LockMode>
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- org.multiverse.api.LockMode
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Comparable<LockMode>
,MultiverseConstants
public enum LockMode extends java.lang.Enum<LockMode> implements MultiverseConstants
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Enum Constant Summary
Enum Constants Enum Constant Description Exclusive
The ExclusiveLock can be compared with the writelock of a traditional read/write lock.None
No locking is done.Read
The LockMode.Read prevents others to acquire the Write/Exclusive-lock, but it allows others to acquire the Read lock.Write
The LockMode.Write prevents others to acquire the Read/Write/Exclusive-lock.
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Field Summary
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Fields inherited from interface org.multiverse.MultiverseConstants
LOCKMODE_EXCLUSIVE, LOCKMODE_NONE, LOCKMODE_READ, LOCKMODE_WRITE, SHAKE_BUGS, SPIN_YIELD, TRACING_ENABLED
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description int
asInt()
static LockMode
valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name.static LockMode[]
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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None
public static final LockMode None
No locking is done.
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Read
public static final LockMode Read
The LockMode.Read prevents others to acquire the Write/Exclusive-lock, but it allows others to acquire the Read lock. Unlike a traditional read/write-lock, it doesn't have to mean that other transactions can't write, it only prevents others from committing.
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Write
public static final LockMode Write
The LockMode.Write prevents others to acquire the Read/Write/Exclusive-lock. Unlike a traditional read-write lock, it doesn't have to mean that other transactions can't read or write, they only can't commit since the Exclusive lock is acquired for that (managed by the STM).
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Exclusive
public static final LockMode Exclusive
The ExclusiveLock can be compared with the writelock of a traditional read/write lock. once the Exclusive lock is acquired no other transaction can acquire any lock or can do any reading/writing (unless the transaction previously has read the transactional object).The ExclusiveLock is the Lock acquired by the STM once a Txn is prepared for writing changes to a TxnObject.
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Method Detail
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values
public static LockMode[] 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 (LockMode c : LockMode.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 LockMode 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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asInt
public int asInt()
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