Apama Documentation : Connecting Apama Applications to External Components : Using Message Services : Using Universal Messaging in Apama Applications : Overview of using UM in Apama applications : General steps for using UM in Apama applications
General steps for using UM in Apama applications
Before you perform the steps required to use UM in an Apama application, consider how your application uses channels. You should know which components need to communicate with each other, which events travel outside a correlator, and which events stay in a single correlator. Understand what channels you need and decide which channels should be UM channels and which, if any, should be Apama channels.
For an Apama application to use UM, the tasks you must accomplish are:
1. Install and configure UM separately from Apama.
2. Make UM libraries available to Apama. See the Universal Messaging documentation and Setting up UM for use by Apama.
3. In your UM installation, create UM channels for use in your Apama application. Alternatively, see Enabling automatic creation of UM channels.
4. Start each correlator with specification of UM options. See Starting correlators that use UM.
5. Optionally, configure adapters to connect to UM. See Configuring adapters to use UM.
6. In your EPL code, subscribe to receive events delivered on UM channels. See Subscribing to channels.
7. In your EPL code, specify UM channels when sending events. See Generating events with the send command.
8. Optionally, create a UM properties file for use when starting a correlator. See Defining UM properties for Apama applications.
9. Monitor the Apama application's use of UM. See Monitoring Apama application use of UM.
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