Jerzy Orlowski wrote:
Hi
From what I see, nested workflows are not yet implemented in t2.
Do you know more or less how will they look like in t2flow XML files?
Will they be another dataflows in a workflow with other role than "top"?
Is it decided how datalinks between "top" dataflow and other dataflows
will look like?
Nested workflows are implemented in Taverna 2.0. I've attached a simple
example.
The nested workflows are modelled as workflow services that refer to the
definition of the nested workflow. The nested workflow has the
attribute role="nested".
Jerzy Orlowski
Alan
<workflow xmlns="http://taverna.sf.net/2008/xml/t2flow"; version="1"><dataflow
id="f42f8da2-f0ca-4679-9cd6-45444da5c0b4"
role="top"><name>dataflow1</name><inputPorts
/><outputPorts><port><name>reply</name></port></outputPorts><processors><processor><name>Nested_workflow</name><inputPorts><port><name>message</name><depth>0</depth></port><port><name>title</name><depth>0</depth></port></inputPorts><outputPorts><port><name>answer</name><depth>0</depth><granularDepth>0</granularDepth></port></outputPorts><annotations
/><activities><activity><raven><group>net.sf.taverna.t2.activities</group><artifact>dataflow-activity</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.activities.dataflow.DataflowActivity</class><inputMap><map
from="title" to="title" /><map from="message" to="message"
/></inputMap><outputMap><map from="answer" to="answer"
/></outputMap><configBean encoding="dataflow"><dataflow
ref="98f47eaa-a64a-4cf8-a0f5-f8bb20b60a3e" /></configBean><annotations
/></activity></activities><dispatchStack><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Parallelize</class><configBean
encoding="xstream"><net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ParallelizeConfig
xmlns="">
<maxJobs>1</maxJobs>
</net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ParallelizeConfig></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ErrorBounce</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Failover</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Retry</class><configBean
encoding="xstream"><net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.RetryConfig
xmlns="">
<backoffFactor>1.0</backoffFactor>
<initialDelay>1000</initialDelay>
<maxDelay>5000</maxDelay>
<maxRetries>0</maxRetries>
</net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.RetryConfig></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Invoke</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer></dispatchStack><iterationStrategyStack><iteration><strategy><cross><port
name="message" depth="0" /><port name="title" depth="0"
/></cross></strategy></iteration></iterationStrategyStack></processor><processor><name>String_Constant</name><inputPorts
/><outputPorts><port><name>value</name><depth>0</depth><granularDepth>0</granularDepth></port></outputPorts><annotations
/><activities><activity><raven><group>net.sf.taverna.t2.activities</group><artifact>stringconstant-activity</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.activities.stringconstant.StringConstantActivity</class><inputMap
/><outputMap><map from="value" to="value" /></outputMap><configBean
encoding="xstream"><net.sf.taverna.t2.activities.stringconstant.StringConstantConfigurationBean
xmlns="">
<value>Hello George</value>
</net.sf.taverna.t2.activities.stringconstant.StringConstantConfigurationBean></configBean><annotations
/></activity></activities><dispatchStack><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Parallelize</class><configBean
encoding="xstream"><net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ParallelizeConfig
xmlns="">
<maxJobs>1</maxJobs>
</net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ParallelizeConfig></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ErrorBounce</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Failover</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Retry</class><configBean
encoding="xstream"><net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.RetryConfig
xmlns="">
<backoffFactor>1.0</backoffFactor>
<initialDelay>1000</initialDelay>
<maxDelay>5000</maxDelay>
<maxRetries>0</maxRetries>
</net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.RetryConfig></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Invoke</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer></dispatchStack><iterationStrategyStack><iteration><strategy
/></iteration></iterationStrategyStack></processor><processor><name>String_Constant0</name><inputPorts
/><outputPorts><port><name>value</name><depth>0</depth><granularDepth>0</granularDepth></port></outputPorts><annotations
/><activities><activity><raven><group>net.sf.taverna.t2.activities</group><artifact>stringconstant-activity</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.activities.stringconstant.StringConstantActivity</class><inputMap
/><outputMap><map from="value" to="value" /></outputMap><configBean
encoding="xstream"><net.sf.taverna.t2.activities.stringconstant.StringConstantConfigurationBean
xmlns="">
<value>Nested workflow call</value>
</net.sf.taverna.t2.activities.stringconstant.StringConstantConfigurationBean></configBean><annotations
/></activity></activities><dispatchStack><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Parallelize</class><configBean
encoding="xstream"><net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ParallelizeConfig
xmlns="">
<maxJobs>1</maxJobs>
</net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ParallelizeConfig></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ErrorBounce</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Failover</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Retry</class><configBean
encoding="xstream"><net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.RetryConfig
xmlns="">
<backoffFactor>1.0</backoffFactor>
<initialDelay>1000</initialDelay>
<maxDelay>5000</maxDelay>
<maxRetries>0</maxRetries>
</net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.RetryConfig></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Invoke</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer></dispatchStack><iterationStrategyStack><iteration><strategy
/></iteration></iterationStrategyStack></processor></processors><conditions
/><datalinks><datalink><sink
type="processor"><processor>Nested_workflow</processor><port>message</port></sink><source
type="processor"><processor>String_Constant</processor><port>value</port></source></datalink><datalink><sink
type="processor"><processor>Nested_workflow</processor><port>title</port></sink><source
type="processor"><processor>String_Constant0</processor><port>value</port></source></datalink><datalink><sink
type="dataflow"><port>reply</port></sink><source
type="processor"><processor>Nested_workflow</processor><port>answer</port></source></datalink></datalinks><annotations
/></dataflow><dataflow id="98f47eaa-a64a-4cf8-a0f5-f8bb20b60a3e"
role="nested"><name>dataflow0</name><inputPorts><port><name>title</name><depth>0</depth><granularDepth>0</granularDepth></port><port><name>message</name><depth>0</depth><granularDepth>0</granularDepth></port></inputPorts><outputPorts><port><name>answer</name></port></outputPorts><processors><processor><name>Ask</name><inputPorts><port><name>title</name><depth>0</depth></port><port><name>message</name><depth>0</depth></port></inputPorts><outputPorts><port><name>answer</name><depth>0</depth><granularDepth>0</granularDepth></port></outputPorts><annotations
/><activities><activity><raven><group>net.sf.taverna.t2.activities</group><artifact>localworker-activity</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.activities.localworker.LocalworkerActivity</class><inputMap><map
from="title" to="title" /><map from="message" to="message"
/></inputMap><outputMap><map from="answer" to="answer"
/></outputMap><configBean
encoding="xstream"><net.sf.taverna.t2.activities.localworker.LocalworkerActivityConfigurationBean
xmlns="">
<script>import javax.swing.JOptionPane;
answer = JOptionPane.showInputDialog(null, (message == void ? null : message),
(title == void ? null : title), JOptionPane.QUESTION_MESSAGE);
</script>
<dependencies />
<classLoaderSharing>workflow</classLoaderSharing>
<localDependencies />
<artifactDependencies />
<inputs>
<net.sf.taverna.t2.workflowmodel.processor.activity.config.ActivityInputPortDefinitionBean>
<handledReferenceSchemes />
<translatedElementType>java.lang.String</translatedElementType>
<allowsLiteralValues>true</allowsLiteralValues>
<name>title</name>
<depth>0</depth>
<mimeTypes>
<string>'text/plain'</string>
</mimeTypes>
</net.sf.taverna.t2.workflowmodel.processor.activity.config.ActivityInputPortDefinitionBean>
<net.sf.taverna.t2.workflowmodel.processor.activity.config.ActivityInputPortDefinitionBean>
<handledReferenceSchemes />
<translatedElementType>java.lang.String</translatedElementType>
<allowsLiteralValues>true</allowsLiteralValues>
<name>message</name>
<depth>0</depth>
<mimeTypes>
<string>'text/plain'</string>
</mimeTypes>
</net.sf.taverna.t2.workflowmodel.processor.activity.config.ActivityInputPortDefinitionBean>
</inputs>
<outputs>
<net.sf.taverna.t2.workflowmodel.processor.activity.config.ActivityOutputPortDefinitionBean>
<granularDepth>0</granularDepth>
<name>answer</name>
<depth>0</depth>
<mimeTypes>
<string>'text/plain'</string>
</mimeTypes>
</net.sf.taverna.t2.workflowmodel.processor.activity.config.ActivityOutputPortDefinitionBean>
</outputs>
</net.sf.taverna.t2.activities.localworker.LocalworkerActivityConfigurationBean></configBean><annotations
/></activity></activities><dispatchStack><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Parallelize</class><configBean
encoding="xstream"><net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ParallelizeConfig
xmlns="">
<maxJobs>1</maxJobs>
</net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ParallelizeConfig></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.ErrorBounce</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Failover</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Retry</class><configBean
encoding="xstream"><net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.RetryConfig
xmlns="">
<backoffFactor>1.0</backoffFactor>
<initialDelay>1000</initialDelay>
<maxDelay>5000</maxDelay>
<maxRetries>0</maxRetries>
</net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.RetryConfig></configBean></dispatchLayer><dispatchLayer><raven><group>net.sf.taverna.t2</group><artifact>workflowmodel-impl</artifact><version>0.4</version></raven><class>net.sf.taverna.t2.workflowmodel.processor.dispatch.layers.Invoke</class><configBean
encoding="xstream"><null xmlns=""
/></configBean></dispatchLayer></dispatchStack><iterationStrategyStack><iteration><strategy><cross><port
name="title" depth="0" /><port name="message" depth="0"
/></cross></strategy></iteration></iterationStrategyStack></processor></processors><conditions
/><datalinks><datalink><sink
type="processor"><processor>Ask</processor><port>title</port></sink><source
type="dataflow"><port>title</port></source></datalink><datalink><sink
type="processor"><processor>Ask</processor><port>message</port></sink><source
type="dataflow"><port>message</port></source></datalink><datalink><sink
type="dataflow"><port>answer</port></sink><source
type="processor"><processor>Ask</processor><port>answer</port></source></datalink></datalinks><annotations
/></dataflow></workflow>------------------------------------------------------------------------------
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