org.yamcs.parameter

Interface ParameterCache

All Known Implementing Classes:

ArrayParameterCache, ParameterCacheImpl

public interface ParameterCache

Method Summary

Modifier and Type	Method and Description
void	clear() Remove all the parameters from the cache
List<ParameterValue>	getAllValues(Parameter p) Returns all values from the cache for the parameter or null if there is no value cached The parameter are returned in descending order (newest parameter is returned first)
List<ParameterValue>	getAllValues(Parameter p, long start, long stop) Same as above but return all values that have the generation time in the (start, stop] interval
ParameterValue	getLastValue(Parameter p) Returns last cached value for parameter or null if there is no value in the cache
List<ParameterValue>	getValues(List<Parameter> plist) Returns cached value for parameter or an empty list if there is no value in the cache
void	update(Collection<ParameterValue> pvs) update the parameters in the cache

Method Detail

update

void update(Collection<ParameterValue> pvs)

update the parameters in the cache

Parameters:

pvs - - parameter value list

getValues

List<ParameterValue> getValues(List<Parameter> plist)

Returns cached value for parameter or an empty list if there is no value in the cache

Parameters:

plist -

Returns:

getLastValue

ParameterValue getLastValue(Parameter p)

Returns last cached value for parameter or null if there is no value in the cache

Parameters:

p - - parameter for which the last value is returned

Returns:

getAllValues

List<ParameterValue> getAllValues(Parameter p)

Returns all values from the cache for the parameter or null if there is no value cached The parameter are returned in descending order (newest parameter is returned first)

Parameters:

p - - parameter for which all values are returned

Returns:

all values from the cache for the parameter or null if there is no value cached

getAllValues

List<ParameterValue> getAllValues(Parameter p,
                                  long start,
                                  long stop)

Same as above but return all values that have the generation time in the (start, stop] interval

Parameters:

p -

start -

stop -

Returns:

clear

void clear()

Remove all the parameters from the cache