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com.sigmadynamics.sdo.rules
Interface RuleCache

public interface RuleCache

An external rule cache interface. External rule metadata is converted to java source files and then compiled during runtime. Once an external rule is compiled, the associated bytecode is cached for fast evaluation the subsequent times the same rule is encountered.

Since:

3.0

Method Summary

void	clear() clear the RuleCache.
Rule	get(RuleDefinition def)
int	getNumberOfRules()
int	getSizeInBytes()
Rule	put(RuleDefinition def, byte[] byteCode)
Rule	putInvalid(RuleDefinition def)
void	removeInactiveRules(double hours)

Method Detail

put

Rule put(RuleDefinition def,
         byte[] byteCode)

Parameters:

def - The RuleDefinition to be cached.

byteCode - Compiled bytecode version of the rule stored in def.

Returns:

Rule An instance of Rule that can be evaluated. Put this rule in the cache.

get

Rule get(RuleDefinition def)

Parameters:

def - The RuleDefinition to be retrieved from the cache.

Returns:

Rule An instance of Rule that can be evaluated. Get the Rule that corresponds to def from the cache.

putInvalid

Rule putInvalid(RuleDefinition def)

Parameters:

def - RuleDefinition that has been detected as invalid.

Returns:

a Rule instance rule, such that rule.isInvalid == true.

getSizeInBytes

int getSizeInBytes()

Returns:

estimated cache size in bytes.

clear

void clear()

clear the RuleCache.

removeInactiveRules

void removeInactiveRules(double hours)

Parameters:

hours - remove the rules from the cache that have not been accessed for specified number of hours.

getNumberOfRules

int getNumberOfRules()

Returns:

the number of rules (including invalid rules) in this RuleCache.

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