WebSphere

Common Event Infrastructure components

Common Event Infrastructure components are installed as a set of applications, services, and resources on the server.

When you configure Common Event Infrastructure, a number of components are created and deployed on your server.

Common Event Infrastructure service
A service installed into the server, that enables applications and clients to use Common Event Infrastructure. You can view the configuration of the Common Event Infrastructure service in the administrative console, as follows:
  • For a server, select Servers > Application Servers > server_name > Business Integration > Common Event Infrastructure > Common Event Infrastructure Service.
  • For a cluster, select Servers > Clusters > cluster_name > Business Integration > Common Event Infrastructure > Common Event Infrastructure Service.

If the check box labeled "Enable the event infrastructure server" is selected, then the service is installed and running or it will start after you restart your server or cluster. If it is cleared, then the service is not installed or will be uninstalled after you restart your server or cluster

Event service settings
A set of properties used by the event service that enable event distribution and persistence using the data store. Typically, no configuration is necessary for this resource, but you might need to create additional event service settings if you want to set up multiple event services in the same cell. To view the event service settings, click Service integration > Event service > Event service settings.
Event messaging configuration
The resources that support asynchronous event transmission to the event service using the Java™ Messaging Service (JMS). The default messaging configuration uses the server embedded messaging. You can optionally configure an external JMS provider for event messaging.
Event database
The event database is used to persistently store events received by the event service. The Derby database is included as part of the server, but is not recommended for use in production environments. Instead, you can configure an external event database on the following products: DB2®, Oracle, SQLServer, and Informix®.
Event filter plug-in
A filter plug-in is used to filter events at the source using XPath event selectors. To configure the filter properties, click Service Integration > Common Event Infrastructure > Event Emitter Factories > Event Filter Settings.
Emitter factory
An emitter factory is an object used by event sources to create emitters; an emitter is used to send events to the event service. The properties of an emitter factory affect the behavior of any emitter that is created using that emitter factory. To view the available emitter factories, click Service Integration > Common Event Infrastructure > Event Emitter Factories.
Event service transmission
An event service transmission is an object defining properties that determine how emitters access the event service synchronously using EJB calls; these properties are used by emitter factories when creating new emitters. You can view or change the available event service transmissions from the emitter factory settings.
JMS transmission
A JMS transmission is an object that defines properties that determine how emitters access the event service asynchronously using a JMS queue; these properties are used by emitter factories when creating new emitters. You can view or change the available JMS transmissions from the emitter factory settings.
Event group

An event group is a logical collection of events used to categorize events according to their content. When querying events from the event service or subscribing to event distribution, an event consumer can specify an event group to retrieve only the events in that group. Event groups can also be used to specify which events should be stored in the persistent data store. To view the available event groups in the administrative console, click Service integration > Common Event Infrastructure > Event service > Event services > event_service > Event groups.


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Timestamp icon Last updated: 22 June 2010


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