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.

Version:

$Id: CounterSetBTreeSelector.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

Field Summary

protected static org.apache.log4j.Logger

log

Constructor Summary

CounterSetBTreeSelector(CounterSetBTree btree)

Method Summary

ICounter[]

selectCounters(int depth, Pattern pattern, long fromTime, long toTime, PeriodEnum period) 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

Field Detail

log

protected static final org.apache.log4j.Logger log

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)

Description copied from interface: ICounterSelector

Selects and returns a collection of performance counters with history.

Specified by:

selectCounters in interface ICounterSelector

Parameters:

depth - When non-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.

Returns:

The selected performance counters.