YAWL - User Manual - Polytechnic of Namibia - Mirrors

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36 CHAPTER 3. GETTING STARTED WITH YAWLparameter AppplicationAmount. When running our specification, a participant will be offered a work-itemfor an instance of this task. They will be given an application identifier, and will work outside of the system,eventually generating an application amount for that application. Figure 3.12 shows how the defaultworklist handler displays an instance of this task for a participant to work with.Figure 3.11: Establishing Parameters on a Task DecompositionFigure 3.12: A Determine Credit Requirements work-item shown on a dynamic form
3.4. ADVANCED WORKFLOW CONCEPTS 37Attaining an application amount may be as trivial as reading the number from the relevant form, or asinvolved as considering the business’s current risk exposure, running calculations, and adjusting the figureto something the insurance company is more willing to accept. The exact nature of the work to be done isleft to the participant and the business rules of the organisation, and only that data relevant to progressingthe workflow needs to be passed back into the system once they are done.Because we can’t transfer data directly between tasks, we’re also going to need a number of local parametersfor the decomposition of our starting net. Specifically, we’ll need matching ApplicationID and Application-Amount local parameters at the net level, and another called CreditReportRef that will be used by a couple ofother tasks in the workflow.Figure 3.13: Data Mappings for Determine Credit Requirements ParametersWith these local net parameters in place, we now need to specify how data is passed between the net andtasks with XPath expressions. The XPath expressions needed are fairly straightforward. For a task inputparameter, we need the expression to fetch and populate the value of this parameter with that of its correspondingnet parameter. For a task output parameter, the matching net parameter needs an expression toretrieve the value of the task parameter. Figure 3.13 shows an example of the queries needed for the DetermineCredit Requirements task (note that XPath expressions of this kind are generated with a couple of mouseclicks in the Editor). A similar exercise can then be conducted for the parameters of the remaining tasks.The only thing remaining to do with data in our specification is to deal with the XOR-Split. XOR-splits needa boolean XPath expression to be associated with each outgoing flow of the split 5 . These expressions areevaluated once a task instance completes. Thus, the expressions can only interrogate the state of a net that arecently completed task has updated. Expressions that evaluate to true indicate that a flow is to be taken. Inthe case of an XOR-Split, the flows have an ordered priority specified. The first flow in order whose XPathexpression evaluates to true will be the only flow taken from a completed task.The only task we need to consider in this regard is Choose approval process. Consulting our transcript again,5 Each XOR-split and OR-split has one flow specified as the default, and is assumed to always have true value, to ensure that theworkflow can continue even when all other flow conditions evaluate to false.
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4.6. CONNECTIONS 87registered with
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4.7. VALIDATING AND SAVING A SPECIF
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4.8. SPECIFICATION ANALYSIS 91lows
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4.8. SPECIFICATION ANALYSIS 93Figur
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4.10. AUTOMATED TASK 95Figure 4.53:
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4.11. RESOURCE MANAGEMENT (MANUAL T
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4.12. TASK TIMER 101Figure 4.59: St
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4.12. TASK TIMER 103Figure 4.62: Th
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4.14. CUSTOM FORMS 105map it to and
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4.15. CONFIGURABLE YAWL 107Figure 4
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4.15. CONFIGURABLE YAWL 109• all
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4.16. CONFIGURABLE LOGGING 111Figur
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4.16. CONFIGURABLE LOGGING 113${now
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4.17. EXTENDED ATTRIBUTES 115Figure
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4.17. EXTENDED ATTRIBUTES 117Attrib
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4.17. EXTENDED ATTRIBUTES 119• in
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4.17. EXTENDED ATTRIBUTES 121eterna
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4.17. EXTENDED ATTRIBUTES 123keys.
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Chapter 5How to Manipulate Data in
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5.3. DATA TRANSFER 1275.3 Data Tran
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5.4. DATA-RELATED ISSUES 129Figure
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5.5. ILLUSTRATIVE EXAMPLES 131Figur
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5.5. ILLUSTRATIVE EXAMPLES 133Now w
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5.5. ILLUSTRATIVE EXAMPLES 137param
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Chapter 6The Runtime EnvironmentThi
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6.2. RESOURCE SERVICE CONFIGURATION
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6.3. LOGGING ON 151• InterfaceS B
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6.4. ADMINISTRATION 153The launchin
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6.4. ADMINISTRATION 155custom servi
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6.4. ADMINISTRATION 157Figure 6.7:
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6.4. ADMINISTRATION 159ample, bank
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6.4. ADMINISTRATION 161At any time,
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6.4. ADMINISTRATION 1636.4.7 Task P
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6.5. MANAGING NON-HUMAN RESOURCES 1
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6.6. RESOURCE CALENDAR MANAGEMENT 1
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6.7. WORK QUEUES 1696.7 Work Queues
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6.7. WORK QUEUES 1716.7.2 The Alloc
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6.8. USER PROFILES 173Figure 6.23:
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6.9. TEAM QUEUES 1756.9 Team Queues
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6.10. YAWL WORKLIST IGOOGLE GADGET
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Chapter 7The Monitor ServiceThe Mon
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7.4. PARAMETERS 181• the informat
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Chapter 8The Worklet ServiceThis ch
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8.2. INSTALLATION 1858.2 Installati
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8.3. USING THE WORKLET SELECTION SE
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8.4. USING THE WORKLET EXCEPTION SE
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8.5. WORKLET RULE SETS AND THE RULE
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8.6. WALKTHROUGH - USING THE WORKLE
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8.7. DEFINING NEW FUNCTIONS FOR RUL
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8.7. DEFINING NEW FUNCTIONS FOR RUL
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8.8. SAMPLE LOG (GENERATED BY WALKT
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Chapter 9The Proclet ServiceIn this
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9.1. INTER-WORKFLOW SUPPORT 239clas
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9.1. INTER-WORKFLOW SUPPORT 241In o
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9.1. INTER-WORKFLOW SUPPORT 243curr
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9.1. INTER-WORKFLOW SUPPORT 247lab1
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9.1. INTER-WORKFLOW SUPPORT 2759.1.
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9.1. INTER-WORKFLOW SUPPORT 289Even
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Chapter 10Other ServicesBecause of
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10.4. MAIL SERVICE 293Like the WSIn
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10.6. DIGITAL SIGNATURE SERVICE 295
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10.7. EMAIL SENDER SERVICE 303Figur
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10.7. EMAIL SENDER SERVICE 305Figur
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Chapter 11Seeking HelpManuals, like
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Bibliography[1] W.M.P. van der Aals
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BIBLIOGRAPHY 311[26] N. Russell, A.
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