public class PooledOptimizer extends AbstractOptimizer implements InitialValueAwareOptimizer
Optimizer which uses a pool of values, storing the next low value of the
range in the database.
<p/>
Note that this optimizer works essentially the same as the
HiLoOptimizer
except that here the bucket ranges are actually
encoded into the database structures.
<p/>
Note if you prefer that the database value be interpreted as the bottom end of our current range,
then use the PooledLoOptimizer
strategy
PooledLoOptimizer
incrementSize, returnClass
Constructor and Description |
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PooledOptimizer(Class returnClass,
int incrementSize)
Constructs a PooledOptimizer
|
Modifier and Type | Method and Description |
---|---|
boolean |
applyIncrementSizeToSourceValues()
Are increments to be applied to the values stored in the underlying
value source?
|
Serializable |
generate(AccessCallback callback)
Generate an identifier value accounting for this specific optimization.
|
IntegralDataTypeHolder |
getLastSourceValue()
A common means to access the last value obtained from the underlying
source.
|
IntegralDataTypeHolder |
getLastValue()
Getter for property 'lastValue'.
|
void |
injectInitialValue(long initialValue)
Reports the user specified initial value to the optimizer.
|
getIncrementSize, getReturnClass
public PooledOptimizer(Class returnClass, int incrementSize)
Constructs a PooledOptimizer
returnClass
- The Java type of the values to be generatedincrementSize
- The increment size.public Serializable generate(AccessCallback callback)
Optimizer
Generate an identifier value accounting for this specific optimization.
All known implementors are synchronized. Consider carefully if a new implementation could drop this requirement.
public IntegralDataTypeHolder getLastSourceValue()
Optimizer
A common means to access the last value obtained from the underlying source. This is intended for testing purposes, since accessing the underlying database source directly is much more difficult.
getLastSourceValue
in interface Optimizer
public boolean applyIncrementSizeToSourceValues()
Optimizer
Are increments to be applied to the values stored in the underlying value source?
applyIncrementSizeToSourceValues
in interface Optimizer
public IntegralDataTypeHolder getLastValue()
Getter for property 'lastValue'. <p/> Exposure intended for testing purposes.
public void injectInitialValue(long initialValue)
InitialValueAwareOptimizer
Reports the user specified initial value to the optimizer. <p/> <tt>-1</tt> is used to indicate that the user did not specify.
injectInitialValue
in interface InitialValueAwareOptimizer
initialValue
- The initial value specified by the user, or <tt>-1</tt> to indicate that the
user did not specify.Copyright © 2001-2018 Red Hat, Inc. All Rights Reserved.