org.ow2.jasmine.probe.collectors.df.internal
Class DfCollector

java.lang.Object
  org.ow2.jasmine.probe.collectors.JCollector
      org.ow2.jasmine.probe.collectors.df.internal.DfCollector

All Implemented Interfaces:

JasmineCollector

public class DfCollector
extends JCollector

Collector implementation for df. This implementation works with a separate thread used to pre collect the results. A simpler implementation could be done by not using a thread. Using a thread is interesting when we do not want to be stuck in case info cannot be got.

Author:

durieuxp

Field Summary

Fields inherited from class org.ow2.jasmine.probe.collectors.JCollector

hostName, indicator, logger, MISC_TARGET, NO_TARGET, period, probeId, probeManager

Constructor Summary

DfCollector(String probeId, JasmineIndicator indicator, int period)
Constructor

Method Summary

void	addResult(JasmineIndicatorValue value) Add a new result to the list.
Collection<String>	getDiskList() Get the disk to be observed null if we are interested on all disks
JasmineIndicatorValue	getLastResult() Retrieve the last results for this indicator This method return a List of results in case indicator represents actually a list of value (for example: df for ALL the disks)
boolean	needResult() Check if this Collector needs a new result.
void	startPolling() Restart polling
void	stopPolling() Stop polling

Methods inherited from class org.ow2.jasmine.probe.collectors.JCollector

addJsr, addLongJsr, addLongValues, addValues, averageJsr, diffJsr, diffLongValues, diffValues, divideJsr, divideLongValues, divideValues, getDefaultTarget, getDomainName, getIndicator, getIndicatorName, getJsr, getProbeId, getServerName, isRemoved, jsrProps, longValue, maxJsr, minJsr, multiplyJsr, multiplyLongValues, multiplyValues, remove, setProbeManager

Methods inherited from class java.lang.Object

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

Constructor Detail

DfCollector

public DfCollector(String probeId,
                   JasmineIndicator indicator,
                   int period)

Constructor

Parameters:

indicator - definition

Method Detail

getDiskList

public Collection<String> getDiskList()

Get the disk to be observed null if we are interested on all disks

Returns:

getLastResult

public JasmineIndicatorValue getLastResult()
                                    throws JasmineCollectorException

Retrieve the last results for this indicator This method return a List of results in case indicator represents actually a list of value (for example: df for ALL the disks)

Specified by:

getLastResult in interface JasmineCollector

Specified by:

getLastResult in class JCollector

Returns:

List of JasmineIndicatorValue

Throws:

JasmineCollectorException

stopPolling

public void stopPolling()

Stop polling

Specified by:

stopPolling in interface JasmineCollector

Specified by:

stopPolling in class JCollector

startPolling

public void startPolling()

Restart polling

Specified by:

startPolling in interface JasmineCollector

Specified by:

startPolling in class JCollector

needResult

public boolean needResult()

Check if this Collector needs a new result. A stopped collector returns false. Otherwise, it returns true if the cache is empty or outdated regarding to the poll period and the OBSOLATE_TIME constant.

Returns:

true if it needs one

addResult

public void addResult(JasmineIndicatorValue value)

Add a new result to the list.

Parameters:

value -