Example of conditional invocation

Created: 2011-11-15 10:20:10 Last updated: 2011-11-15 10:20:11

This workflow demonstrates how nested workflows can be conditionally invoked

Option 1:

Authors (1)

Titles (1)

Descriptions (1)

Dependencies (0)

Inputs (1)

Name	Description
condition	The condition that determines which of the two nested workflows is invoked

Processors (5)

Name	Type	Description
condition_checker	beanshell	This service checks if the condition is "true" and if so outputs a value in the pass_flags list and leaves the fail_flags empty. If the condition is not true then the service outputs a value in the fail_flags list and leaves the pass_flags empty. Script import java.util.ArrayList; ArrayList pass_flags = new ArrayList(); ArrayList fail_flags = new ArrayList(); if (condition.equals("true")) { pass_flags.add(condition); } else { fail_flags.add(condition); }
if_condition_passed	workflow
if_condition_failed	workflow
Flatten_List	localworker	Script flatten(inputs, outputs, depth) { for (i = inputs.iterator(); i.hasNext();) { element = i.next(); if (element instanceof Collection && depth > 0) { flatten(element, outputs, depth - 1); } else { outputs.add(element); } } } outputlist = new ArrayList(); flatten(inputlist, outputlist, 1);
Merge_String_List_to_a_String	localworker	Script String seperatorString = "\n"; if (seperator != void) { seperatorString = seperator; } StringBuffer sb = new StringBuffer(); for (Iterator i = stringlist.iterator(); i.hasNext();) { String item = (String) i.next(); sb.append(item); if (i.hasNext()) { sb.append(seperatorString); } } concatenated = sb.toString();

Beanshells (1)

Name	Description	Inputs	Outputs
condition_checker	This service checks if the condition is "true" and if so outputs a value in the pass_flags list and leaves the fail_flags empty. If the condition is not true then the service outputs a value in the fail_flags list and leaves the pass_flags empty.	condition	pass_flags fail_flags

Outputs (1)

Name	Description
message

Datalinks (7)

Source	Sink
condition	condition_checker:condition
condition_checker:pass_flags	if_condition_passed:sentinel
condition_checker:fail_flags	if_condition_failed:sentinel
Flatten_List:outputlist	Merge_String_List_to_a_String:stringlist
if_condition_passed:message	Flatten_List:inputlist
if_condition_failed:message	Flatten_List:inputlist
Merge_String_List_to_a_String:concatenated	message