AF TagEventListener
The AF TagEventListener activity publishes notification messages each time values of the tags that you listen to are changed. Therefore, by using this activity, you can listen to tag updates and fetch the changed entries.
General
In the General tab, you can specify the name of the activity in the process, establish a connection to the PI AF server, select the tags to listen to, and define how often the tag updates are to be checked.
Description
In the Description tab, you can type a short description for the AF TagEventListener activity.
Advanced
In the Advanced tab, you can specify the object class of the entry that you want to search for.
Field | Module Property? | Description |
---|---|---|
Sequence Key | No | This field contains an XPath expression that specifies the order in which the process runs. Process instances with sequencing keys that have the same value are executed sequentially in the order in which the process instances were created. |
Custom Job Id | No | This field contains an XPath expression that specifies a custom job ID for the process instance. This ID is displayed in the TIBCO Administrator View Service dialog, and it is also available in the $_processContext process variable. |
Conversations
A conversation represents two or more related message exchanges in the same process that are correlated by the BusinessWorks engine. In the
Conversations tab, you can initiate a conversation by clicking the
Add New Conversation
icon
.
For more information about how to use conversations, see TIBCO ActiveMatrix BusinessWorks Application Development.
Output
In the Output tab, you can find the published changes of the tag values.
For descriptions of all the attributes in the previous three items, see Attributes in the Output Items.
- Attributes in the Output Items
In this section, you can find the descriptions of all the attributes for the header, serverName, and tagList items in the Output tab.