uk.org.ogsadai.activity.delivery
Class DeliverToResourcePropertyActivity

java.lang.Object
  |
  +--uk.org.ogsadai.activity.Activity
        |
        +--uk.org.ogsadai.activity.delivery.DeliverToResourcePropertyActivity

public class DeliverToResourcePropertyActivity

extends Activity

This activity writes its input to a resource property. The activity can be added to the end of an activity pipeline to turn a sychronous request into an asynchronous one. When the request is completed the client can retrieve the result from the resource property. See the activity user documentation for more details: OGSADAI/doc/interaction/activities/delivery/deliverToResourceProperty.html

Author:

OGSA-DAI team

Field Summary

private static java.lang.String	COPYRIGHT_NOTICE Copyright statement
private static DAILogger	LOG Logger object for logging in this class
private java.lang.StringBuffer	mBuffer String buffer used to build resource property value
private BlockReader	mInput Activity input - output from another activity
private boolean	mIsSessionSpecific Is resource property to be a session specific resource property?
private javax.xml.namespace.QName	mResourcePropName Resource property name

Fields inherited from class uk.org.ogsadai.activity.Activity

mContext, mExternalInputs, mExternalOutputs, mInternalInputs, mInternalOutputs

Constructor Summary

DeliverToResourcePropertyActivity(org.w3c.dom.Element element)

Method Summary

void	initialise() This method should be overridden by subclasses to perform any initialisation they require before the process method invocations begin.
void	processBlock() Performs an iteration of the processing of an activity.

Methods inherited from class uk.org.ogsadai.activity.Activity

cleanUp, connectsTo, createOutputPipe, getActivityConfiguration, getActivityName, getCause, getName, getObservableStatus, getProperties, getSession, getStatus, hasActivityConfiguration, hasProperties, process, processFirst, setActivityName, setCompleted, setError

Methods inherited from class java.lang.Object

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

Field Detail

COPYRIGHT_NOTICE

private static final java.lang.String COPYRIGHT_NOTICE

Copyright statement

See Also:

Constant Field Values

LOG

private static final DAILogger LOG

Logger object for logging in this class

mInput

private BlockReader mInput

Activity input - output from another activity

mResourcePropName

private javax.xml.namespace.QName mResourcePropName

Resource property name

mIsSessionSpecific

private boolean mIsSessionSpecific

Is resource property to be a session specific resource property?

mBuffer

private java.lang.StringBuffer mBuffer

String buffer used to build resource property value

Constructor Detail

DeliverToResourcePropertyActivity

public DeliverToResourcePropertyActivity(org.w3c.dom.Element element)
                                  throws ActivityCreationException,
                                         ActivitySpecificationException

Method Detail

initialise

public void initialise()
                throws ActivitySpecificationException,
                       ActivityExecutionException

Description copied from class: Activity

This method should be overridden by subclasses to perform any initialisation they require before the process method invocations begin. This might be used for setting up convenient fields to reference objects contained in the context. It shouldn't be used for opening resources. That should be done in processFirst.

Overrides:

initialise in class Activity

Throws:

ActivityExecutionException - If some system problem prevents the activity from initialising.

ActivitySpecificationException - If a problem with settings provided by a client prevents the activity from initialising.

processBlock

public void processBlock()

Description copied from class: Activity

Performs an iteration of the processing of an activity. This may involve reading a block of input data and writing a block of output data, or may involve some other kind of processing. When an activity is processed by the OGSA-DAI engine, this method will be invoked repeatedly until the activity either completes or stops due to an error or termination call. An implementation of this method should invoke the setCompleted method to indicate that processing is complete, or the setError method if an error occurs that will prevent the processing from completing.

Specified by:

processBlock in class Activity