public class SpeculativeConfigurationError extends ControlFlowError
ControlFlowError
thrown for dealing with the speculative configuration mechanism.
Multiverse uses a speculative configuration mechanism if enabled makes certain optimizations possible. E.g. one of the optimizations
is to use different Txn
implementations that are optimized for certain transaction lengths. As
long as the speculation is not violated, you will get better performance than when a more heavy weight transaction/configuration.
So ControlFlowErrors are not something bad, but just a way for the STM to figure out what the cheapest settings are for performance/scalability.
Because a transaction can fail on a speculative failure more than once, it could be that the transaction is retried. Normally
this is not an issue, since the transaction will be retried, so is invisible. And once the TxnExecutor
has learned, it will not make the same mistakes again, but if you do io (e.g. print to the System.out or do logging) you can expect
to see aborts, even though there is no other reason to.
Speculative behavior can be turned of (either on the Txn or STM level) but you will not get the best out of performance. For
the speculative behavior to learn, it is important that the TxnExecutor
is reused.
TxnFactoryBuilder.setSpeculative(boolean)
,
Serialized FormModifier and Type | Field and Description |
---|---|
static SpeculativeConfigurationError |
INSTANCE |
Constructor and Description |
---|
SpeculativeConfigurationError(boolean fillStackTrace)
Creates a SpeculativeConfigurationError.
|
SpeculativeConfigurationError(String message)
Creates a SpeculativeConfigurationError with the provided message.
|
SpeculativeConfigurationError(String message,
Throwable cause)
Creates a SpeculativeConfigurationError with the provided message and cause.
|
getStackTrace
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
public static final SpeculativeConfigurationError INSTANCE
public SpeculativeConfigurationError(boolean fillStackTrace)
fillStackTrace
- if the StackTrace should be filled.public SpeculativeConfigurationError(String message)
message
- the message of the exception.Copyright © 2020. All rights reserved.