Humantask Assignment: Names and Expressions Assignment via Rules

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This blog post is part of a series of posts about humantask assignment. You can find the starting point of this series by following the next link.

In this post I will give an example of task assignment by Names And Expressions using Oracle Business Rules. I will use the same BPM process as in most of the other posts in this series.
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Now we have the process, we can assign the task to a representative, group of representatives or role. For this open the taskfile and select the assignment tab.
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Edit the default.DefaultPerformer. Select Rule-based and specify the ruleset e.g. NamesAndExpressionsRule.
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After selecting OK, the business rules can be specified. Because the process does not have a payload it is not possible to use input data to influence the behavior of the business rules. For this reason I have used priority, one of the many task properties, to control the bussiness rule behavior.
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The picture below shows the two implemented rules. The first rule “High Priority” assigns the task to taskGroup1 when the priority has the value 1 or 2. The second rule “Low Priority” assigns the task to taskGroup2 when the priority has a value of three or higher.
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The priority can be set on the General tab of the task. This is during development time. This means that the process must be redeployed when the priority is changed.
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After deployment of the process we can start new instances via the EM.
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As a first example I will test it with priority = 2. The task is assigned to TaskGroup1.
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As you can see in the trace of the rules the High Priority rule is executed.
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And a second example with the priority = 4.
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The Low Priority rule is executed. Which means that the task is assigned to taskGroup2.
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And the task trace …
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The example shows a very basic implementation of task assignment with the help of Oracle Business Rules. From here you can download the sample project.

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About Author

As a SOA and BPM professional, Marcel is an experienced consultant in the field of process design and process modeling. Within this field system integration and IT-transcending business processes have Marcel's special interest.

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