Class SpeculativeConfigurationError
- java.lang.Object
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- java.lang.Throwable
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- java.lang.Error
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- org.multiverse.api.exceptions.ControlFlowError
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- org.multiverse.api.exceptions.SpeculativeConfigurationError
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- All Implemented Interfaces:
Serializable
public class SpeculativeConfigurationError extends ControlFlowError
AControlFlowError
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.
Unexpected retries
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 theTxnExecutor
is reused.
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Field Summary
Fields Modifier and Type Field Description static SpeculativeConfigurationError
INSTANCE
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Constructor Summary
Constructors Constructor 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.
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Method Summary
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Methods inherited from class org.multiverse.api.exceptions.ControlFlowError
getStackTrace
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Methods inherited from class java.lang.Throwable
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
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Field Detail
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INSTANCE
public static final SpeculativeConfigurationError INSTANCE
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Constructor Detail
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SpeculativeConfigurationError
public SpeculativeConfigurationError(boolean fillStackTrace)
Creates a SpeculativeConfigurationError.- Parameters:
fillStackTrace
- if the StackTrace should be filled.
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SpeculativeConfigurationError
public SpeculativeConfigurationError(String message)
Creates a SpeculativeConfigurationError with the provided message.- Parameters:
message
- the message of the exception.
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