Integrate Software AG Products Using Digital Event Services 10.4 | Integrate Software AG Products Using Digital Event Services | MashZone NextGen Help | Appendix | Legacy Presto components | Apps and Workspaces | Custom Apps | Create Fully Custom Apps in the App Editor | Tightly Coupled Interaction for Custom Apps
 
Tightly Coupled Interaction for Custom Apps
With tightly-coupled interactions, both publisher and subscriber apps know the topic name involved in an interaction and the topic payload for that type of event. Generally, both apps must be developed together to sustain tightly-coupled interactions.
In most cases, the apps involved in a tightly-coupled interaction are all custom apps. Basic apps created in the App Maker wizard can be used as publishers in a tightly-coupled interaction, but they cannot be subscribers.
There are two requirements to implement a tightly-coupled interaction:
*The publish and subscribe API methods. See Publisher App for Tightly Coupled Interactions and Subscriber App for Tightly Coupled Interactions for instructions and examples.
*Bundle the tightly-coupled apps together for end use in either:
*A workspace app created in Mashboard.
Simply create a new workspace in Mashboard (see Create Workspace Apps with Mashboard for instructions). Then add the tightly-coupled apps to the workspace or to one tab or page of a multi-tab or multi-page workspace.
No wiring is needed to enabled interactions between tightly-coupled apps that are bundled within a workspace app.
Save the workspace app. You can then publish the workspace to the AppDepot or publish or embed the workspace in other destinations to allow you and other users to use the tightly-coupled apps.
*External HTML pages.
You can simply directly embed each app involved in a tightly-coupled interaction in any HTML page using <script> tags. You must use specific parameters in the <script> tags in this case. See Embedding Tightly Coupled Apps for details.
Subscribers can also use Wildcard Subscriptions for Tightly-Coupled Interactions to subscribe to a set of topics.
Note: For links to other app examples, click More... above.

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