Each instance of the application has a service ID, whose value can be set using spring.cloud.bus.id, and whose value is expected to be a colon-separated list of identifiers, in order of least specific to most specific. The default value is constructed from the environment as a combination of the spring.application.name and server.port (or spring.application.index if set). The default value of the ID is constructed in the form app:index:id where:
app is the vcap.application.name if it exists, or spring.application.nameindex is the vcap.application.instance_index if it exists, or else spring.application.index, or else local.server.port (or server.port or 0).id is the vcap.application.instance_id if it exists, or else a random value.The HTTP endpoints accept a "destination" parameter, e.g. "/bus/refresh?destination=customers:9000", where the destination is a service ID. If the ID is owned by an instance on the Bus then it will process the message and all other instances will ignore it.