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Workflow Pattern - Structured Loop (2)

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This workflow is a GWorkflowDL representation of a structured loop that updates the variable "x" in each iteration. This workflow is equivalent to the following pseudo code: x:=0; for ( i:=0; i<=99; i++) { x:=x+i; } x_result:=x; Please remark that this demonstration workflow does not invoke any external services at all. The calculation is done only by using the GWorkflowDL's syntax and semantics.

Created: 2008-12-09

Credits: Andreas Hoheisel

Workflow Pattern - Structured Loop (B) (2)

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This workflow is an alternative GWorkflowDL representation of a structured loop that updates the variable "x" in each iteration and which models the control flow separately from the index "i". Here a version of the graph with manual graph layout: This workflow is equivalent to the following pseudo code: x:=0; for ( i:=0; i<=99; i++) { x:=x+i; } x_result:=x; Please remark that this demonstration workflow does not invoke any external services at all. The c...

Created: 2008-12-09

Credits: Andreas Hoheisel

Attributions: Workflow Pattern - Structured Loop

Workflow Pattern - Structured Loop (C) (2)

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This workflow is a GWorkflowDL representation of a structured loop that counts from 0 to 99.   This workflow is equivalent to the following pseudo code: for ( i:=0; i Please remark that this demonstration workflow does not invoke any external services at all.

Created: 2008-12-09

Credits: Andreas Hoheisel

Attributions: Workflow Pattern - Structured Loop (B)

Workflow Pattern - Sequence (1)

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This workflow is a GWorkflowDL representation of a sequence that sequentially invokes A and B. This workflow is equivalent to the following pseudo code: end_A = A(); end_B = B(end_A);

Created: 2008-12-03

Credits: Andreas Hoheisel

Workflow Pattern - Parallel Split (AND-Split) (1)

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This workflow is a GWorkflowDL representation of a parallel split that invokes A and B recurrently without synchronization. This workflow is equivalent to the following pseudo code: new Thread( end_A = A() ); new Thread( end_B = B() );

Created: 2008-12-03 | Last updated: 2008-12-03

Credits: Andreas Hoheisel

Workflow Pattern - Synchronization (AND-Join) (2)

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This workflow is a GWorkflowDL representation of a synchronization (AND Join) that waits until A and B finish their execution. This workflow is equivalent to the following pseudo code: threadA = new Thread( end_A = A() ); threadB = new Thread( end_B = B() ); threadA.join(); threadB.join();

Created: 2009-01-19

Credits: Andreas Hoheisel

Workflow Pattern - Exclusive Choice (XOR-S... (2)

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This workflow is a GWorkflowDL representation of an exclusive choice (XOR Split) that invokes either A or B. This workflow is equivalent to the following pseudo code: x = XOR_Split; if (x=="true") { end_A = A(x); } else { end_B = B(x); }

Created: 2008-12-09

Credits: Andreas Hoheisel

Workflow Pattern - Simple Merge (XOR-Join) (1)

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This workflow is a GWorkflowDL representation of a simple merge (XOR Join) that invokes C when either A or B has been invoked. The structure of the GWorkflowDL representation of a simple merge is identical to the multi merge pattern!

Created: 2008-12-03 | Last updated: 2009-01-19

Credits: Andreas Hoheisel

Workflow Pattern - Multi Choice (OR Split) (2)

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This workflow is a GWorkflowDL representation of a multi choice (OR Split) that invokes either A or B or A and B.

Created: 2008-12-09

Credits: Andreas Hoheisel

Workflow Pattern - Structured Synchronizin... (2)

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This workflow is a GWorkflowDL representation of a structured synchronizing merge that invokes either A or B or A and B and merges to one branch afterwards.

Created: 2009-01-19

Credits: Andreas Hoheisel

Workflow Pattern - Multi Merge (2)

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This workflow is a GWorkflowDL representation of a multi merge that invokes C after each invocation of A or B.

Created: 2009-01-19 | Last updated: 2009-01-19

Credits: Andreas Hoheisel

Workflow Pattern - Structured Discriminator (2)

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This workflow is a GWorkflowDL representation of a structured discriminator (1-out-of-M Join) that invokes C after the first invocation of A or B (M=2). All next (M-1) invocations of A or B are ignored. This is only one out of various possibilities to model this workflow pattern. Notice alternative representation of this pattern at http://www.myexperiment.org/workflows/632

Created: 2009-01-19 | Last updated: 2009-01-19

Credits: Andreas Hoheisel

Workflow Pattern - Cancelling Discriminator (1)

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This workflow is a GWorkflowDL representation of a cancelling discriminator that cancels the invocation of B if A has been executed and vice versa. This is only one out of various possibilities to model this workflow pattern. Please regard that this workflow example uses a separate method for cancelling the invocation of the activity. This is very useful if the invocation of the activity is done asynchronously as it is often implemented for long running methods. It may be necessary to propag...

Created: 2009-01-06

Credits: Andreas Hoheisel

Workflow Pattern - Structured Partial Join (1)

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This workflow is a GWorkflowDL representation of a structured partial join (N-out-of-M join) that invokes D after N=2 invocations of A or B or C (M=3). All next (M-N) invocations of A or B or C are ignored. This is only one out of various possibilities to model this workflow pattern.

Created: 2009-01-06

Credits: Andreas Hoheisel

Workflow Pattern - Structured Discriminato... (1)

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This workflow is an alternative GWorkflowDL representation of a structured discriminator (1-out-of-M Join) that invokes C after the first invocation of A or B (M=2). All next (M-1) invocations of A or B are ignored. The pattern is resets if both, A and B have been invoked. Please note that the transitions "C", "ignore", and "release" have different priorities (not shown in the graph) that make the net deterministic (except the occurrence of "A" and &q...

Created: 2009-01-19 | Last updated: 2009-01-20

Credits: Andreas Hoheisel

Workflow Pattern - Blocking Discriminator ... (1)

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This workflow is a GWorkflowDL representation of a blocking discriminator (1-out-of-M Join) that invokes C after the first invocation of A or B (M=2). All next (M-1) invocations of A or B are ignored and the AND transition is blocked. The pattern is resets if both, A and B have been invoked. Then the next token on "begin" can be processed. Please note that the transitions "C", "ignore", and "release" have different priorities (represented by p0, p1, an...

Created: 2009-01-20

Credits: Andreas Hoheisel

Workflow Pattern - Structured Discriminato... (1)

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This workflow is an alternative GWorkflowDL representation of a structured discriminator (1-out-of-M Join) that invokes C after the first invocation of A or B (M=2). All next (M-1) invocations of A or B are ignored for the same data group. Other tokens on the place "begin" can be processed recurrently if they belong to another data group. Please note that the transitions "C" and "ignore" have different priorities (not shown in the graph) that make the net determ...

Created: 2009-01-20

Credits: Andreas Hoheisel

WCP-04 Exclusive choice - if/else branching (1)

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The choice of executing choiceA or choiceB is determined by using String_List_Intersection and String_List_Difference. If in="true" then the intersection will yield a non-empty list, triggering execution of choiceA. This list will however not differ from the input, and so choiceB will iterate over an empty list (ie. not execute). Note how using 'difference' for the else-case here means that if you run the workflow with in="bob", choiceB would still run. Some early if/el...

Created: 2012-02-20 | Last updated: 2012-02-20

Credits: Stian Soiland-Reyes

Attributions: Example of a conditional execution workflow Example of conditional invocation