Each Cellar node embeds a cluster event producer. The producer is used when the node has to send an event to the other nodes.
The producer is responsible for the following functions:
To create the cluster event message.
To send the cluster event message in a target distributed queue. The queue is unique and can be identified by the cluster group and the type of resource. For instance, a possible queue name is
book.bundles, wherebookis the cluster group's name andbundlesis the type of the resource. Thanks to this, Cellar is able to send a cluster event per resource and is able to target this cluster event only to a given cluster group.
It's possible to manage the producer of a node from any node.
For instance, we can see the current status of the producer using the following cluster:producer-status command:
karaf@root> cluster:producer-status Node Status [node2:5702 ] [ON ] * [node1:5701 ] [ON ]
Here, we can see the status...