Package org.yamcs.parameter

Class ArrayParameterCache

java.lang.Object

org.yamcs.parameter.ArrayParameterCache

All Implemented Interfaces:

ParameterCache

public class ArrayParameterCache
extends Object
implements ParameterCache

This is another implementation of the parameter cache using arrays to store primitive values (instead of storing Value).

It should consume less memory than ParameterCacheImpl in case of large number of parameter values.

Method Summary

Modifier and Type	Method	Description
void	clear()	Remove all the parameters from the cache
List<ParameterValue>	getAllValues(Parameter pdef)	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 pdef, long start, long stop)	Same as above but return all values that have the generation time in the (start, stop] interval
ParameterValue	getLastValue(Parameter pdef)	Returns last cached value for parameter or null if there is no value in the cache
ParameterValue	getLastValue1(Parameter p)
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

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

update

public void update(Collection<ParameterValue> pvs)

Description copied from interface: ParameterCache

update the parameters in the cache

Specified by:

update in interface ParameterCache

Parameters:

pvs - - parameter value list

getLastValue

public ParameterValue getLastValue(Parameter pdef)

Description copied from interface: ParameterCache

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

Specified by:

getLastValue in interface ParameterCache

Parameters:

pdef - - parameter for which the last value is returned

Returns:

getLastValue1

public ParameterValue getLastValue1(Parameter p)

getValues

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

Description copied from interface: ParameterCache

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

Specified by:

getValues in interface ParameterCache

Returns:

getAllValues

public List<ParameterValue> getAllValues(Parameter pdef)

Description copied from interface: ParameterCache

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)

Specified by:

getAllValues in interface ParameterCache

Parameters:

pdef - - 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

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

Description copied from interface: ParameterCache

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

Specified by:

getAllValues in interface ParameterCache

Returns:

clear

public void clear()

Description copied from interface: ParameterCache

Remove all the parameters from the cache

Specified by:

clear in interface ParameterCache