Package org.opennms.netmgt.measurements.impl

Class RrdtoolXportFetchStrategy

java.lang.Object

org.opennms.netmgt.measurements.impl.AbstractRrdBasedFetchStrategy

org.opennms.netmgt.measurements.impl.RrdtoolXportFetchStrategy

All Implemented Interfaces:

MeasurementFetchStrategy

public class RrdtoolXportFetchStrategy
extends AbstractRrdBasedFetchStrategy

Used to fetch measurements from RRD files by invoking rrdtool via exec. As of Feb 24th the jrrd library does not support 'xport' commands. See http://issues.opennms.org/browse/JRRD-3.

Author:

Jesse White , Dustin Frisch

Field Summary

Fields

Modifier and Type	Field	Description
static long	XPORT_TIMEOUT_MS	Maximum runtime of 'rrdtool xport' in milliseconds before failing and throwing an exception.

Constructor Summary

Constructors

Constructor	Description
RrdtoolXportFetchStrategy()

Method Summary

Modifier and Type	Method	Description
protected FetchResults	fetchMeasurements(long start, long end, long step, int maxrows, Map<Source,String> rrdsBySource, Map<String,Object> constants, QueryMetadata metadata)	Performs the actual retrieval of the values from the RRD/JRB files.

Methods inherited from class org.opennms.netmgt.measurements.impl.AbstractRrdBasedFetchStrategy

fetch

Methods inherited from class java.lang.Object

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

Field Detail

XPORT_TIMEOUT_MS

public static final long XPORT_TIMEOUT_MS

Maximum runtime of 'rrdtool xport' in milliseconds before failing and throwing an exception.

See Also:

Constant Field Values

Constructor Detail

RrdtoolXportFetchStrategy

public RrdtoolXportFetchStrategy()

Method Detail

fetchMeasurements

protected FetchResults fetchMeasurements(long start,
                                         long end,
                                         long step,
                                         int maxrows,
                                         Map<Source,String> rrdsBySource,
                                         Map<String,Object> constants,
                                         QueryMetadata metadata)
                                  throws org.jrobin.core.RrdException

Performs the actual retrieval of the values from the RRD/JRB files.

Specified by:

fetchMeasurements in class AbstractRrdBasedFetchStrategy

Throws:

org.jrobin.core.RrdException