org.rhq.server.metrics.aggregation

Class IndexEntriesLoader

java.lang.Object

org.rhq.server.metrics.aggregation.IndexEntriesLoader

public class IndexEntriesLoader
extends Object

Loads index entries during aggregation.

Author:

John Sanda

Constructor Summary

Constructors

Constructor and Description
IndexEntriesLoader(org.joda.time.DateTime currentTimeSlice, org.joda.time.DateTime currentDay, MetricsDAO dao)

Method Summary

Methods

Modifier and Type	Method and Description
List<CacheIndexEntry>	loadCurrentCacheIndexEntries(int pageSize, MetricsTable table) Returns cache index entries for the current time slice.
List<CacheIndexEntry>	loadPastIndexEntries(org.joda.time.DateTime startDay) We store a configurable amount of past data where the amount is specified as a duration in days.

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexEntriesLoader

public IndexEntriesLoader(org.joda.time.DateTime currentTimeSlice,
                  org.joda.time.DateTime currentDay,
                  MetricsDAO dao)

Method Detail

loadPastIndexEntries

public List<CacheIndexEntry> loadPastIndexEntries(org.joda.time.DateTime startDay)

We store a configurable amount of past data where the amount is specified as a duration in days. Suppose that the duration is set at 4 days, and the current time is 14:00 Friday. This method will query the index as far back as 14:00 on Monday, and each day up to the current time slice of today will be queried for past data.

Returns:

The past cache index entries

loadCurrentCacheIndexEntries

public List<CacheIndexEntry> loadCurrentCacheIndexEntries(int pageSize,
                                                 MetricsTable table)

Returns cache index entries for the current time slice.

Parameters:

pageSize - The limit of rows to return per query

table - One of raw, 1 hr, or 6hr

Returns:

The cache index entries for the current time slice