com.bigdata.counters.query

Class CounterSetBTreeSelector

java.lang.Object

com.bigdata.counters.query.CounterSetBTreeSelector

All Implemented Interfaces:

ICounterSelector

public class CounterSetBTreeSelector
extends Object
implements ICounterSelector

Reads the relevant performance counter data from the store.

Author:

Bryan Thompson

Constructor Summary

Constructors

Constructor and Description
CounterSetBTreeSelector(CounterSetBTree btree)

Method Summary

Methods

Modifier and Type	Method and Description
ICounter[]	selectCounters(int depth, Pattern pattern, long fromTime, long toTime, PeriodEnum period, boolean historyRequiredIsIgnored) Selects and returns a collection of performance counters with history.

Methods inherited from class java.lang.Object

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

Constructor Detail

CounterSetBTreeSelector

public CounterSetBTreeSelector(CounterSetBTree btree)

Parameters:

btree - The CounterSetBTree.

Method Detail

selectCounters

public ICounter[] selectCounters(int depth,
                        Pattern pattern,
                        long fromTime,
                        long toTime,
                        PeriodEnum period,
                        boolean historyRequiredIsIgnored)

Description copied from interface: ICounterSelector

Selects and returns a collection of performance counters with history.

Specified by:

selectCounters in interface ICounterSelector

Parameters:

depth - When GT ZERO, this specifies a constraint on the maximum depth for a counter may can be selected.

pattern - A regular expression which must be satisified (optional).

fromTime - The inclusive lower bound in milliseconds of the performance counter timestamps which will be selected.

toTime - The exclusive upper bound in milliseconds of the performance counter timestamps which will be selected.

period - The unit of aggregation for the selected performance counters.

historyRequiredIsIgnored - When true the ICounter will be ignored unless it is associated with a HistoryInstrument. (This used to be the default behavior, but there are use cases where we do not need to have history.)

Returns:

The selected performance counters.