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| <h1>Qompass container development</h1> |
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| A container encapsules a component, i.e. it encloses an existing components and delegates ports to |
| it. The following figure depicts a container enclosing an component. The principal idea is that the |
| container handles the treatment of non-functional properties. Therefore, the existing component can |
| focus on the implementation of the business logic. It is therefore also called executor, a term |
| introduced by the OMG standard CORBA component model (CCM).<br></br> |
| There are two different ways how a container can influence the execution of an executor. Either via |
| interception or via extension. The two variants are shown in the sequel. |
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| <h2>How to create a container interceptor</h2> |
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| A container interceptor is basically a connector between a port of the . Thus, it can be defined in the same way as a |
| connector, but needs to carry the stereotype interceptor. |
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| <h2>How to create a container extension</h2> |
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| A container extension is a |
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| <h2>How to create a container rule</h2> |
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| Before you create a container rule, you typically create either a interceptor or a container |
| extension (see above). |
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| There are two different kinds of rules: |
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| <li>local rules that are only visible to a component owning them |
| <li>global rules that are visible for all models that import the model library. In both |
| cases, the container rule is principally a stereotyped UML class. In the first case, it is a |
| sub-class owned by the component, which is typically created by the container rule dialog available |
| for the package. In the second the container rule is a normal class owned by a package; use the Qompass |
| palette to create the rule. Then, right on the rule to edit its properties. |
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