com.pervasive.datarush.monitoring

Class StatisticsMap

java.lang.Object

com.pervasive.datarush.monitoring.StatisticsMap

All Implemented Interfaces:

Serializable

public final class StatisticsMap
extends Object
implements Serializable

Utility that provides a mapping from StatisticDefinition to StatisticSupplier. This map is backed by a LinkedHashMap so that insertion order is preserved. As values are added to the map, we check that the supplier is of an appropriate type so that on read we then get a type-safe lookup.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
StatisticsMap() Create an empty map.
StatisticsMap(List<RuntimeStatistic<?>> entries) Creates a map consisting of the specified entries

Method Summary

Methods

Modifier and Type	Method and Description
List<RuntimeStatistic<?>>	entries() Returns the list of statistic pairs
StatisticsMap	finalSnapshot() Returns a map of all the statistics in this map, converting to final snapshots.
<T extends StatisticSupplier> T	get(StatisticDefinition<T> definition) Returns the value corresponding to the given definition
Set<StatisticDefinition<?>>	keys() Returns the set of keys.
<T extends StatisticSupplier> void	put(RuntimeStatistic<T> statistic) Type-safe put that adds a pair of statistic and definition
void	put(StatisticDefinition<?> definition, StatisticSupplier supplier) Adds a value to the map.
int	size() Returns the number of entries in the map

Methods inherited from class java.lang.Object

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

Constructor Detail

StatisticsMap

public StatisticsMap()

Create an empty map.

StatisticsMap

public StatisticsMap(List<RuntimeStatistic<?>> entries)

Creates a map consisting of the specified entries

Parameters:

entries - the list of entries

Method Detail

put

public <T extends StatisticSupplier> void put(RuntimeStatistic<T> statistic)

Type-safe put that adds a pair of statistic and definition

Type Parameters:

T - the type of supplier

Parameters:

statistic - the statistic to add

put

public void put(StatisticDefinition<?> definition,
       StatisticSupplier supplier)

Adds a value to the map.

Parameters:

definition - the definition.

supplier - the supplier

Throws:

ClassCastException - If the supplier is not of a type appropriate for the definition.

get

public <T extends StatisticSupplier> T get(StatisticDefinition<T> definition)

Returns the value corresponding to the given definition

Type Parameters:

T - the type of supplier that corresponds to the definition.

Parameters:

definition - the definition

Returns:

the value. will never be null but may be "unavailable"

keys

public Set<StatisticDefinition<?>> keys()

Returns the set of keys. This will be returned in the order in which the values were added to the map.

Returns:

the set of keys

entries

public List<RuntimeStatistic<?>> entries()

Returns the list of statistic pairs

Returns:

the entries in the map

size

public int size()

Returns the number of entries in the map

Returns:

the number of entries in the map

finalSnapshot

public StatisticsMap finalSnapshot()

Returns a map of all the statistics in this map, converting to final snapshots.

Returns:

a final snapshot of this map