DeliverFromGFTPActivity (OGSA-DAI -- (c) International Business Machines Corporation, 2002-2006, The University of Edinburgh, 2002-2006)

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uk.org.ogsadai.activity.delivery.wsrf
Class DeliverFromGFTPActivity

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

public class DeliverFromGFTPActivity
extends Activity

This activity gets data from a GridFTP server.

Server-side, OGSA-DAI will use the client's GSI credential during the transfer. If no credential is provided then the activity will fail.

For information on this activity see the OGSA-DAI user doc: OGSA-DAI/doc/interaction/activities/delivery/deliverFromGFTP.html

Author:: The OGSA-DAI Project Team

Field Summary
`private static java.lang.String`	`COPYRIGHT_NOTICE` Copyright statement.
`private static DAILogger`	`LOG` Logger object for logging in this class.
`private org.ietf.jgss.GSSCredential`	`mCredentials` Security credential
`private java.lang.String`	`mFile` GridFTP file name
`private org.globus.io.streams.GridFTPInputStream`	`mGFTPInputStream` Input stream from GridFTP
`private java.lang.String`	`mHost` GridFTP host
`private BlockWriter`	`mOutput` Activity output - data from GridFTP
`private int`	`mPort` GridFTP port

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

mContext, mExternalInputs, mExternalOutputs, mInternalInputs, mInternalOutputs

Constructor Summary
`DeliverFromGFTPActivity(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.
`void`	`processFirst()` This method is called during the first iteration of processing 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, 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

See Also:: Constant Field Values

LOG

private static DAILogger LOG

Logger object for logging in this class.

mOutput

private BlockWriter mOutput

Activity output - data from GridFTP

mGFTPInputStream

private org.globus.io.streams.GridFTPInputStream mGFTPInputStream

Input stream from GridFTP

mHost

private java.lang.String mHost

GridFTP host

mPort

private int mPort

GridFTP port

mFile

private java.lang.String mFile

GridFTP file name

mCredentials

private org.ietf.jgss.GSSCredential mCredentials

Security credential

Constructor Detail

DeliverFromGFTPActivity

public DeliverFromGFTPActivity(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.

processFirst

public void processFirst()

Description copied from class: Activity

This method is called during the first iteration of processing an activity. It can be overridden by subclasses to define some processing that should be done only once during the first iteration of the activity processing, for example evaluating a database query.

Overrides:: processFirst in class Activity

See Also:: Activity.processFirst()

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.