java.lang.Object
- org.multiverse.stms.gamma.transactions.GammaTxnConfig

All Implemented Interfaces:

TxnConfig, MultiverseConstants, GammaConstants
```
public final class GammaTxnConfig
extends Object
implements TxnConfig, GammaConstants
```
A configuration object that contains the configuration for a GammaTxn.
GammaTxnConfig object is considered to be immutable. The only mutable part if the speculative configuration that can get upgraded if enabled and speculations failed.

Field Summary

Fields
Modifier and Type	Field	Description
`BackoffPolicy`	`backoffPolicy`
`boolean`	`blockingAllowed`
`boolean`	`controlFlowErrorsReused`
`boolean`	`dirtyCheck`
`String`	`familyName`
`GlobalConflictCounter`	`globalConflictCounter`
`static AtomicLong`	`idGenerator`
`boolean`	`inconsistentReadAllowed`
`boolean`	`interruptible`
`boolean`	`isAnonymous`
`boolean`	`isFat`
`IsolationLevel`	`isolationLevel`
`int`	`maxFixedLengthTransactionSize`
`int`	`maximumPoorMansConflictScanLength`
`int`	`maxRetries`
`int`	`minimalArrayTreeSize`
`ArrayList<TxnListener>`	`permanentListeners`
`PropagationLevel`	`propagationLevel`
`LockMode`	`readLockMode`
`int`	`readLockModeAsInt`
`boolean`	`readonly`
`boolean`	`speculative`
`AtomicReference<SpeculativeGammaConfiguration>`	`speculativeConfiguration`
`int`	`spinCount`
`GammaStm`	`stm`
`long`	`timeoutNs`
`TraceLevel`	`traceLevel`
`boolean`	`trackReads`
`boolean`	`unrepeatableReadAllowed`
`LockMode`	`writeLockMode`
`int`	`writeLockModeAsInt`
`boolean`	`writeSkewAllowed`

Fields inherited from interface org.multiverse.MultiverseConstants
LOCKMODE_EXCLUSIVE, LOCKMODE_NONE, LOCKMODE_READ, LOCKMODE_WRITE, SHAKE_BUGS, SPIN_YIELD, TRACING_ENABLED

Constructor Summary

Constructors
Constructor	Description
`GammaTxnConfig(GammaStm stm)`
`GammaTxnConfig(GammaStm stm, int maxFixedLengthTransactionSize)`
`GammaTxnConfig(GammaStm stm, GammaStmConfig config)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`GammaTxnConfig`	`addPermanentListener(TxnListener listener)`
`BackoffPolicy`	`getBackoffPolicy()`	Returns the BackoffPolicy used by the Stm when a transaction conflicts with another transaction.
`String`	`getFamilyName()`	Returns the family name of this Txn.
`GlobalConflictCounter`	`getGlobalConflictCounter()`
`IsolationLevel`	`getIsolationLevel()`	Gets the IsolationLevel used.
`int`	`getMaxRetries()`	Returns the maximum number of times this Txn be retried before failing.
`List<TxnListener>`	`getPermanentListeners()`	Returns an unmodifiable list containing all permanent TxnListener.
`PropagationLevel`	`getPropagationLevel()`	Returns the PropagationLevel used.
`LockMode`	`getReadLockMode()`	Gets the current LockMode for all reads.
`SpeculativeGammaConfiguration`	`getSpeculativeConfiguration()`
`int`	`getSpinCount()`	Returns the maximum number of times the transaction is allowed to spin on a read to become readable (perhaps it is locked).
`GammaStm`	`getStm()`	Returns the Stm that creates transactions based on this configuration.
`long`	`getTimeoutNs()`	Returns the total timeout in nanoseconds.
`TraceLevel`	`getTraceLevel()`	Returns the TraceLevel.
`LockMode`	`getWriteLockMode()`	Gets the current LockMode for all writes.
`GammaTxnConfig`	`init()`
`boolean`	`isBlockingAllowed()`	If an explicit retry (so a blocking transaction) is allowed.
`boolean`	`isControlFlowErrorsReused()`	Checks if the `ControlFlowError` is cached or a new one is used.
`boolean`	`isDirtyCheckEnabled()`	Checks if dirty check is enabled on writes when a transaction commits.
`boolean`	`isInterruptible()`	Checks if the Txn can be interrupted if it is blocking.
`boolean`	`isReadonly()`	Checks if this Txn is readonly.
`boolean`	`isReadTrackingEnabled()`	Checks if this transaction does automatic read tracking.
`boolean`	`isSpeculative()`	Checks if speculative configuration is enabled.
`GammaTxnConfig`	`setBackoffPolicy(BackoffPolicy backoffPolicy)`
`GammaTxnConfig`	`setBlockingAllowed(boolean blockingAllowed)`
`GammaTxnConfig`	`setControlFlowErrorsReused(boolean controlFlowErrorsReused)`
`GammaTxnConfig`	`setDirtyCheckEnabled(boolean dirtyCheck)`
`GammaTxnConfig`	`setFamilyName(String familyName)`
`GammaTxnConfig`	`setFat()`
`GammaTxnConfig`	`setInterruptible(boolean interruptible)`
`GammaTxnConfig`	`setIsolationLevel(IsolationLevel isolationLevel)`
`GammaTxnConfig`	`setMaximumPoorMansConflictScanLength(int maximumPoorMansConflictScanLength)`
`GammaTxnConfig`	`setMaxRetries(int maxRetries)`
`GammaTxnConfig`	`setPropagationLevel(PropagationLevel propagationLevel)`
`GammaTxnConfig`	`setReadLockMode(LockMode readLockMode)`
`GammaTxnConfig`	`setReadonly(boolean readonly)`
`GammaTxnConfig`	`setReadTrackingEnabled(boolean trackReads)`
`GammaTxnConfig`	`setSpeculative(boolean speculativeConfigEnabled)`
`GammaTxnConfig`	`setSpinCount(int spinCount)`
`GammaTxnConfig`	`setTimeoutNs(long timeoutNs)`
`GammaTxnConfig`	`setTraceLevel(TraceLevel traceLevel)`
`GammaTxnConfig`	`setWriteLockMode(LockMode writeLockMode)`
`String`	`toString()`
`void`	`updateSpeculativeConfigurationToUseCommute()`
`void`	`updateSpeculativeConfigurationToUseConstructedObjects()`
`void`	`updateSpeculativeConfigurationToUseEnsure()`
`void`	`updateSpeculativeConfigurationToUseExplicitLocking()`
`void`	`updateSpeculativeConfigurationToUseListeners()`
`void`	`updateSpeculativeConfigurationToUseMinimalTransactionLength(int newLength)`
`void`	`updateSpeculativeConfigurationToUseNonRefType()`
`void`	`updateSpeculativeConfigurationToUseRichMansConflictScan()`
`void`	`updateSpeculativeConfigureToUseAbortOnly()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - idGenerator
```
public static final AtomicLong idGenerator
```
  - speculativeConfiguration
```
public final AtomicReference<SpeculativeGammaConfiguration> speculativeConfiguration
```
  - stm
```
public final GammaStm stm
```
  - globalConflictCounter
```
public final GlobalConflictCounter globalConflictCounter
```
  - propagationLevel
```
public PropagationLevel propagationLevel
```
  - isolationLevel
```
public IsolationLevel isolationLevel
```
  - writeSkewAllowed
```
public boolean writeSkewAllowed
```
  - inconsistentReadAllowed
```
public boolean inconsistentReadAllowed
```
  - readLockMode
```
public LockMode readLockMode
```
  - writeLockMode
```
public LockMode writeLockMode
```
  - readLockModeAsInt
```
public int readLockModeAsInt
```
  - writeLockModeAsInt
```
public int writeLockModeAsInt
```
  - familyName
```
public String familyName
```
  - isAnonymous
```
public boolean isAnonymous
```
  - interruptible
```
public boolean interruptible
```
  - readonly
```
public boolean readonly
```
  - spinCount
```
public int spinCount
```
  - dirtyCheck
```
public boolean dirtyCheck
```
  - minimalArrayTreeSize
```
public int minimalArrayTreeSize
```
  - trackReads
```
public boolean trackReads
```
  - blockingAllowed
```
public boolean blockingAllowed
```
  - maxRetries
```
public int maxRetries
```
  - speculative
```
public boolean speculative
```
  - maxFixedLengthTransactionSize
```
public int maxFixedLengthTransactionSize
```
  - backoffPolicy
```
public BackoffPolicy backoffPolicy
```
  - timeoutNs
```
public long timeoutNs
```
  - traceLevel
```
public TraceLevel traceLevel
```
  - controlFlowErrorsReused
```
public boolean controlFlowErrorsReused
```
  - isFat
```
public boolean isFat
```
  - maximumPoorMansConflictScanLength
```
public int maximumPoorMansConflictScanLength
```
  - permanentListeners
```
public ArrayList<TxnListener> permanentListeners
```
  - unrepeatableReadAllowed
```
public boolean unrepeatableReadAllowed
```
- Constructor Detail
  - GammaTxnConfig
```
public GammaTxnConfig(GammaStm stm)
```
  - GammaTxnConfig
```
public GammaTxnConfig(GammaStm stm,
                      GammaStmConfig config)
```
  - GammaTxnConfig
```
public GammaTxnConfig(GammaStm stm,
                      int maxFixedLengthTransactionSize)
```
- Method Detail
  - getReadLockMode
```
public LockMode getReadLockMode()
```
    Description copied from interface: TxnConfig
    
    Gets the current LockMode for all reads.
    
    Specified by:
    
    getReadLockMode in interface TxnConfig
    
    Returns:
    
    the current LockMode for all reads.
    
    See Also:
    
    TxnFactoryBuilder.setReadLockMode(LockMode)
  - getWriteLockMode
```
public LockMode getWriteLockMode()
```
    Description copied from interface: TxnConfig
    
    Gets the current LockMode for all writes.
    
    Specified by:
    
    getWriteLockMode in interface TxnConfig
    
    Returns:
    
    the current LockMode for all writes.
    
    See Also:
    
    TxnFactoryBuilder.setWriteLockMode(LockMode)
  - getIsolationLevel
```
public IsolationLevel getIsolationLevel()
```
    Description copied from interface: TxnConfig
    
    Gets the IsolationLevel used. With the IsolationLevel you have control on the isolated behavior between transactions.
    
    Specified by:
    
    getIsolationLevel in interface TxnConfig
    
    Returns:
    
    the IsolationLevel.
    
    See Also:
    
    TxnFactoryBuilder.setIsolationLevel(IsolationLevel)
  - isControlFlowErrorsReused
```
public boolean isControlFlowErrorsReused()
```
    Description copied from interface: TxnConfig
    
    Checks if the ControlFlowError is cached or a new one is used.
    Exception creation can be very expensive, so by default the ControlFlowError is reused, but this can be problematic when debugging.
    
    Specified by:
    
    isControlFlowErrorsReused in interface TxnConfig
    
    Returns:
    
    true if the ControlFlowError is reused.
    
    See Also:
    
    TxnFactoryBuilder.setControlFlowErrorsReused(boolean)
  - getSpeculativeConfiguration
```
public SpeculativeGammaConfiguration getSpeculativeConfiguration()
```
  - getTimeoutNs
```
public long getTimeoutNs()
```
    Description copied from interface: TxnConfig
    
    Returns the total timeout in nanoseconds. Long.MAX_VALUE indicates that there is no timeout.
    
    Specified by:
    
    getTimeoutNs in interface TxnConfig
    
    Returns:
    
    the total remaining timeout.
    
    See Also:
    
    TxnFactoryBuilder.setTimeoutNs(long)
  - getTraceLevel
```
public TraceLevel getTraceLevel()
```
    Description copied from interface: TxnConfig
    
    Returns the TraceLevel. With the TraceLevel you have control on the logging.
    
    Specified by:
    
    getTraceLevel in interface TxnConfig
    
    Returns:
    
    the TraceLevel.
    
    See Also:
    
    TxnFactoryBuilder.setTraceLevel(TraceLevel)
  - isInterruptible
```
public boolean isInterruptible()
```
    Description copied from interface: TxnConfig
    
    Checks if the Txn can be interrupted if it is blocking.
    
    Specified by:
    
    isInterruptible in interface TxnConfig
    
    Returns:
    
    true if the Txn can be interrupted if it is blocking, false otherwise.
    
    See Also:
    
    TxnFactoryBuilder.setInterruptible(boolean)
  - getBackoffPolicy
```
public BackoffPolicy getBackoffPolicy()
```
    Description copied from interface: TxnConfig
    
    Returns the BackoffPolicy used by the Stm when a transaction conflicts with another transaction.
    
    Specified by:
    
    getBackoffPolicy in interface TxnConfig
    
    Returns:
    
    the BackoffPolicy used.
    
    See Also:
    
    TxnFactoryBuilder.setBackoffPolicy(BackoffPolicy)
  - isSpeculative
```
public boolean isSpeculative()
```
    Description copied from interface: TxnConfig
    
    Checks if speculative configuration is enabled. When enabled the STM is able to select better performing/scalable implementations at the cost of some SpeculativeConfigurationError. This will be caught by the TxnExecutor and the transaction will be retried, so in most cases this is not something to worry about, but it can be confusing in the beginning because of unexpected failures in the execution of transactions.
    
    Specified by:
    
    isSpeculative in interface TxnConfig
    
    Returns:
    
    true if speculative configuration is enabled.
    
    See Also:
    
    TxnFactoryBuilder.setSpeculative(boolean)
  - getFamilyName
```
public String getFamilyName()
```
    Description copied from interface: TxnConfig
    
    Returns the family name of this Txn. Every transaction in principle should have a family name. This information can be used for debugging/logging purposes but also other techniques that rely to know something about similar types of transactions like profiling.
    
    Specified by:
    
    getFamilyName in interface TxnConfig
    
    Returns:
    
    the familyName. The returned value can be null.
    
    See Also:
    
    TxnFactoryBuilder.setFamilyName(String)
  - isReadonly
```
public boolean isReadonly()
```
    Description copied from interface: TxnConfig
    
    Checks if this Txn is readonly. With a readonly transaction you can prevent any updates or new objects being created.
    
    Specified by:
    
    isReadonly in interface TxnConfig
    
    Returns:
    
    true if readonly, false otherwise.
    
    See Also:
    
    TxnFactoryBuilder.setReadonly(boolean)
  - getSpinCount
```
public int getSpinCount()
```
    Description copied from interface: TxnConfig
    
    Returns the maximum number of times the transaction is allowed to spin on a read to become readable (perhaps it is locked).
    
    Specified by:
    
    getSpinCount in interface TxnConfig
    
    Returns:
    
    the maximum number of spins
    
    See Also:
    
    TxnFactoryBuilder.setSpinCount(int)
  - isDirtyCheckEnabled
```
public boolean isDirtyCheckEnabled()
```
    Description copied from interface: TxnConfig
    
    Checks if dirty check is enabled on writes when a transaction commits. Turning of saves time, but forces writes that cause no change.
    
    Specified by:
    
    isDirtyCheckEnabled in interface TxnConfig
    
    Returns:
    
    true of dirty check is enabled.
    
    See Also:
    
    TxnFactoryBuilder.setDirtyCheckEnabled(boolean)
  - getStm
```
public GammaStm getStm()
```
    Description copied from interface: TxnConfig
    
    Returns the Stm that creates transactions based on this configuration.
    
    Specified by:
    
    getStm in interface TxnConfig
    
    Returns:
    
    the stm.
  - getGlobalConflictCounter
```
public GlobalConflictCounter getGlobalConflictCounter()
```
  - isReadTrackingEnabled
```
public boolean isReadTrackingEnabled()
```
    Description copied from interface: TxnConfig
    
    Checks if this transaction does automatic read tracking. Read tracking is needed for blocking transactions, but also for writeskew detection. Disadvantage of read tracking is that it is more expensive because the reads not to be registered on some datastructure so that they are tracked.
    
    Specified by:
    
    isReadTrackingEnabled in interface TxnConfig
    
    Returns:
    
    true if the transaction does automatic read tracking, false otherwise.
    
    See Also:
    
    TxnFactoryBuilder.setReadTrackingEnabled(boolean)
  - isBlockingAllowed
```
public boolean isBlockingAllowed()
```
    Description copied from interface: TxnConfig
    
    If an explicit retry (so a blocking transaction) is allowed. With this property one can prevent that a Txn is able to block waiting for some change.
    
    Specified by:
    
    isBlockingAllowed in interface TxnConfig
    
    Returns:
    
    true if explicit retry is allowed, false otherwise.
    
    See Also:
    
    TxnFactoryBuilder.setBlockingAllowed(boolean)
  - getMaxRetries
```
public int getMaxRetries()
```
    Description copied from interface: TxnConfig
    
    Returns the maximum number of times this Txn be retried before failing. The returned value will always be equal or larger than 0. If the value is getAndSet high and you are encountering a lot of TooManyRetryExceptions it could be that the objects are just not concurrent enough.
    
    Specified by:
    
    getMaxRetries in interface TxnConfig
    
    Returns:
    
    the maxRetries.
    
    See Also:
    
    TxnFactoryBuilder.setMaxRetries(int)
  - getPropagationLevel
```
public PropagationLevel getPropagationLevel()
```
    Description copied from interface: TxnConfig
    
    Returns the PropagationLevel used. With the PropagationLevel you have control on how the transaction is dealing with nesting of transactions.
    
    Specified by:
    
    getPropagationLevel in interface TxnConfig
    
    Returns:
    
    the PropagationLevel used.
    
    See Also:
    
    TxnFactoryBuilder.setPropagationLevel(PropagationLevel)
  - getPermanentListeners
```
public List<TxnListener> getPermanentListeners()
```
    Description copied from interface: TxnConfig
    
    Returns an unmodifiable list containing all permanent TxnListener.
    
    Specified by:
    
    getPermanentListeners in interface TxnConfig
    
    Returns:
    
    unmodifiable List containing all permanent TxnListeners.
    
    See Also:
    
    TxnFactoryBuilder.addPermanentListener(org.multiverse.api.lifecycle.TxnListener)
  - updateSpeculativeConfigurationToUseNonRefType
```
public void updateSpeculativeConfigurationToUseNonRefType()
```
  - updateSpeculativeConfigurationToUseListeners
```
public void updateSpeculativeConfigurationToUseListeners()
```
  - updateSpeculativeConfigureToUseAbortOnly
```
public void updateSpeculativeConfigureToUseAbortOnly()
```
  - updateSpeculativeConfigurationToUseCommute
```
public void updateSpeculativeConfigurationToUseCommute()
```
  - updateSpeculativeConfigurationToUseExplicitLocking
```
public void updateSpeculativeConfigurationToUseExplicitLocking()
```
  - updateSpeculativeConfigurationToUseConstructedObjects
```
public void updateSpeculativeConfigurationToUseConstructedObjects()
```
  - updateSpeculativeConfigurationToUseRichMansConflictScan
```
public void updateSpeculativeConfigurationToUseRichMansConflictScan()
```
  - updateSpeculativeConfigurationToUseMinimalTransactionLength
```
public void updateSpeculativeConfigurationToUseMinimalTransactionLength(int newLength)
```
  - updateSpeculativeConfigurationToUseEnsure
```
public void updateSpeculativeConfigurationToUseEnsure()
```
  - init
```
public GammaTxnConfig init()
```
  - setTimeoutNs
```
public GammaTxnConfig setTimeoutNs(long timeoutNs)
```
  - setFamilyName
```
public GammaTxnConfig setFamilyName(String familyName)
```
  - setMaxRetries
```
public GammaTxnConfig setMaxRetries(int maxRetries)
```
  - setMaximumPoorMansConflictScanLength
```
public GammaTxnConfig setMaximumPoorMansConflictScanLength(int maximumPoorMansConflictScanLength)
```
  - setReadTrackingEnabled
```
public GammaTxnConfig setReadTrackingEnabled(boolean trackReads)
```
  - setSpeculative
```
public GammaTxnConfig setSpeculative(boolean speculativeConfigEnabled)
```
  - setReadonly
```
public GammaTxnConfig setReadonly(boolean readonly)
```
  - setDirtyCheckEnabled
```
public GammaTxnConfig setDirtyCheckEnabled(boolean dirtyCheck)
```
  - setBlockingAllowed
```
public GammaTxnConfig setBlockingAllowed(boolean blockingAllowed)
```
  - setInterruptible
```
public GammaTxnConfig setInterruptible(boolean interruptible)
```
  - setControlFlowErrorsReused
```
public GammaTxnConfig setControlFlowErrorsReused(boolean controlFlowErrorsReused)
```
  - setSpinCount
```
public GammaTxnConfig setSpinCount(int spinCount)
```
  - setBackoffPolicy
```
public GammaTxnConfig setBackoffPolicy(BackoffPolicy backoffPolicy)
```
  - setTraceLevel
```
public GammaTxnConfig setTraceLevel(TraceLevel traceLevel)
```
  - setPropagationLevel
```
public GammaTxnConfig setPropagationLevel(PropagationLevel propagationLevel)
```
  - setIsolationLevel
```
public GammaTxnConfig setIsolationLevel(IsolationLevel isolationLevel)
```
  - setWriteLockMode
```
public GammaTxnConfig setWriteLockMode(LockMode writeLockMode)
```
  - setReadLockMode
```
public GammaTxnConfig setReadLockMode(LockMode readLockMode)
```
  - setFat
```
public GammaTxnConfig setFat()
```
  - addPermanentListener
```
public GammaTxnConfig addPermanentListener(TxnListener listener)
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class GammaTxnConfig

Field Summary

Fields inherited from interface org.multiverse.stms.gamma.GammaConstants

Fields inherited from interface org.multiverse.MultiverseConstants

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

idGenerator

speculativeConfiguration

stm

globalConflictCounter

propagationLevel

isolationLevel

writeSkewAllowed

inconsistentReadAllowed

readLockMode

writeLockMode

readLockModeAsInt

writeLockModeAsInt

familyName

isAnonymous

interruptible

readonly

spinCount

dirtyCheck

minimalArrayTreeSize

trackReads

blockingAllowed

maxRetries

speculative

maxFixedLengthTransactionSize

backoffPolicy

timeoutNs

traceLevel

controlFlowErrorsReused

isFat

maximumPoorMansConflictScanLength

permanentListeners

unrepeatableReadAllowed

Constructor Detail

GammaTxnConfig

GammaTxnConfig

GammaTxnConfig

Method Detail

getReadLockMode

getWriteLockMode

getIsolationLevel

isControlFlowErrorsReused

getSpeculativeConfiguration

getTimeoutNs

getTraceLevel

isInterruptible

getBackoffPolicy

isSpeculative

getFamilyName

isReadonly

getSpinCount

isDirtyCheckEnabled

getStm

getGlobalConflictCounter

isReadTrackingEnabled

isBlockingAllowed

getMaxRetries

getPropagationLevel

getPermanentListeners

updateSpeculativeConfigurationToUseNonRefType

updateSpeculativeConfigurationToUseListeners

updateSpeculativeConfigureToUseAbortOnly

updateSpeculativeConfigurationToUseCommute

updateSpeculativeConfigurationToUseExplicitLocking

updateSpeculativeConfigurationToUseConstructedObjects

updateSpeculativeConfigurationToUseRichMansConflictScan

updateSpeculativeConfigurationToUseMinimalTransactionLength

updateSpeculativeConfigurationToUseEnsure

init

setTimeoutNs

setFamilyName

setMaxRetries

setMaximumPoorMansConflictScanLength