org.apache.taverna.activities.stringconstant

Class StringConstantActivity

java.lang.Object

org.apache.taverna.annotation.AbstractAnnotatedThing<Activity<?>>

org.apache.taverna.workflowmodel.processor.activity.AbstractActivity<ConfigType>

org.apache.taverna.workflowmodel.processor.activity.AbstractAsynchronousActivity<com.fasterxml.jackson.databind.JsonNode>

org.apache.taverna.activities.stringconstant.StringConstantActivity

All Implemented Interfaces:

Annotated<Activity<?>>, Configurable<com.fasterxml.jackson.databind.JsonNode>, Activity<com.fasterxml.jackson.databind.JsonNode>, AsynchronousActivity<com.fasterxml.jackson.databind.JsonNode>, WorkflowItem

public class StringConstantActivity
extends AbstractAsynchronousActivity<com.fasterxml.jackson.databind.JsonNode>

An Activity that holds a constant string value.

It is automatically configured to have no input ports and only one output port named value.

Author:

Stuart Owen, David Withers

Field Summary

Fields

Modifier and Type	Field and Description
static String	URI

Fields inherited from class org.apache.taverna.workflowmodel.processor.activity.AbstractActivity

inputPortMapping, inputPorts, outputPortMapping, outputPorts

Constructor Summary

Constructors

Constructor and Description
StringConstantActivity()

Method Summary

Modifier and Type	Method and Description
void	configure(com.fasterxml.jackson.databind.JsonNode json) Called immediately after object construction by the deserialisation framework with a configuration bean built from the auto-generated XML.
void	executeAsynch(Map<String,T2Reference> data, AsynchronousActivityCallback callback) Request an asynchronous invocation of the activity on the specified data.
com.fasterxml.jackson.databind.JsonNode	getConfiguration() Get a configuration bean representing the definition of the activity.
String	getExtraDescription()
String	getStringValue()

Methods inherited from class org.apache.taverna.workflowmodel.processor.activity.AbstractActivity

addInput, addOutput, addOutput, configurePorts, getEdits, getInputPortMapping, getInputPorts, getOutputPortMapping, getOutputPorts, removeInputs, removeOutputs, setEdits

Methods inherited from class org.apache.taverna.annotation.AbstractAnnotatedThing

getAddAnnotationEdit, getAnnotations, getRemoveAnnotationEdit, setAnnotations

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.taverna.workflowmodel.processor.activity.Activity

getInputPortMapping, getInputPorts, getOutputPortMapping, getOutputPorts, setEdits

Methods inherited from interface org.apache.taverna.annotation.Annotated

getAddAnnotationEdit, getAnnotations, getRemoveAnnotationEdit, setAnnotations

Field Detail

URI

public static final String URI

See Also:

Constant Field Values

Constructor Detail

StringConstantActivity

public StringConstantActivity()

Method Detail

configure

public void configure(com.fasterxml.jackson.databind.JsonNode json)
               throws ActivityConfigurationException

Description copied from class: AbstractAsynchronousActivity

Called immediately after object construction by the deserialisation framework with a configuration bean built from the auto-generated XML.

This method is responsible for the creation of input and output ports, something that is currently done in the constructor of the Taverna 1 Processor class.

Specified by:

configure in interface Configurable<com.fasterxml.jackson.databind.JsonNode>

Specified by:

configure in interface Activity<com.fasterxml.jackson.databind.JsonNode>

Specified by:

configure in class AbstractAsynchronousActivity<com.fasterxml.jackson.databind.JsonNode>

Throws:

ActivityConfigurationException

See Also:

Activity.configure(java.lang.Object)

getStringValue

public String getStringValue()

getConfiguration

public com.fasterxml.jackson.databind.JsonNode getConfiguration()

Description copied from class: AbstractAsynchronousActivity

Get a configuration bean representing the definition of the activity. This bean should contain enough information to rebuild the input and output port sets, mappings are explicitly handled by the serialisation framework but the ports are assumed to be generated during the configuration stage rather than explicitly stored.

Specified by:

getConfiguration in interface Configurable<com.fasterxml.jackson.databind.JsonNode>

Specified by:

getConfiguration in class AbstractAsynchronousActivity<com.fasterxml.jackson.databind.JsonNode>

See Also:

Configurable.getConfiguration()

executeAsynch

public void executeAsynch(Map<String,T2Reference> data,
                          AsynchronousActivityCallback callback)

Description copied from class: AbstractAsynchronousActivity

Request an asynchronous invocation of the activity on the specified data. The data items are named relative to the input port names of the activity (as opposed to the parent processor), the invocation layer is responsible for translating these appropriately before this method is called. The callback object provides access to a DataManager instance that can be used to resolve the entity identifiers in the data map, push results up and signal failure conditions.

This method must not block! However it happens this method must return immediately after creating the new activity invocation. Do not do any heavy lifting in the body of this method without creating a new thread specifically for it.

Specified by:

executeAsynch in interface AsynchronousActivity<com.fasterxml.jackson.databind.JsonNode>

Specified by:

executeAsynch in class AbstractAsynchronousActivity<com.fasterxml.jackson.databind.JsonNode>

getExtraDescription

public String getExtraDescription()