org.rhq.server.metrics.aggregation

Class IndexIterator

java.lang.Object

org.rhq.server.metrics.aggregation.IndexIterator

All Implemented Interfaces:

Iterator<IndexEntry>

public class IndexIterator
extends Object
implements Iterator<IndexEntry>

An iterator for the index with paging support. The iterator will scan through all partitions for a particular date range, one page at a time. If a query results in a read timeout, the iterator simply logs the exception and queries the next page.

Author:

John Sanda

Constructor Summary

Constructors

Constructor and Description
IndexIterator(org.joda.time.DateTime startTime, org.joda.time.DateTime endTime, IndexBucket bucket, MetricsDAO dao, MetricsConfiguration configuration)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	hasNext()
IndexEntry	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexIterator

public IndexIterator(org.joda.time.DateTime startTime,
             org.joda.time.DateTime endTime,
             IndexBucket bucket,
             MetricsDAO dao,
             MetricsConfiguration configuration)

Parameters:

startTime - The start time inclusive of the date range to query

endTime - The end time exlusive of the date range to query

bucket - Either raw, 1 hour, or 6 hour

dao - Used for querying the index

configuration - The metrics configuration which provides the total number of partitions and page size

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<IndexEntry>

next

public IndexEntry next()

Specified by:

next in interface Iterator<IndexEntry>

remove

public void remove()

Specified by:

remove in interface Iterator<IndexEntry>