org.globus.mds.usefulrp
Class AccumulatorResourceProperty

java.lang.Object
  org.globus.wsrf.impl.BaseResourceProperty
      org.globus.wsrf.impl.ReflectionResourceProperty
          org.globus.mds.usefulrp.AccumulatorResourceProperty

All Implemented Interfaces:

ResourceProperty

public class AccumulatorResourceProperty

extends ReflectionResourceProperty

An MDS ResourceProperty that will allow services to easily publish metrics about their load.
This RP is specfically designed for measuring cumulative quantities (such as number of hits, number of bytes transferred), with the TODO ability to publish derived statistics such as average rate of change of the accumulator (which will provide, for example, hits/second or bytes/second).
Note that this RP implements no persistence (in order to have minimal dependencies on other configuration) but will TODO indicate in its output when it began making the present set of measurements.

Field Summary

(package private) java.util.Date	lastCalculation keeps track of when we last performed decays.
private static org.apache.commons.logging.Log	logger
(package private) Accumulator	publishedValue The stub type that will be serialised to go over the wire.

Fields inherited from class org.globus.wsrf.impl.ReflectionResourceProperty

Fields inherited from class org.globus.wsrf.impl.BaseResourceProperty

metaData

Constructor Summary

AccumulatorResourceProperty(javax.xml.namespace.QName name)

Method Summary

void	accumulate(long amount)
java.lang.Object	getDynamicValue()
(package private) void	performDecays(double q)

Methods inherited from class org.globus.wsrf.impl.ReflectionResourceProperty

add, clear, get, getValueSimple, initialize, isArray, isEmpty, iterator, remove, set, setObject, setPropertyName, size, toElements, toSOAPElements

Methods inherited from class org.globus.wsrf.impl.BaseResourceProperty

convert, convertObject, convertPrimitive, getMetaData, setMetaData

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static org.apache.commons.logging.Log logger

publishedValue

Accumulator publishedValue

The stub type that will be serialised to go over the wire.

lastCalculation

java.util.Date lastCalculation

keeps track of when we last performed decays. This is different from the output schema lastChange value.

Constructor Detail

AccumulatorResourceProperty

public AccumulatorResourceProperty(javax.xml.namespace.QName name)
                            throws java.lang.Exception

Throws:

java.lang.Exception - passes along any exception encountered during construction of underlying ReflectionResourceProperty.

Method Detail

getDynamicValue

public java.lang.Object getDynamicValue()

accumulate

public void accumulate(long amount)

performDecays

void performDecays(double q)