Members and Member Roles
Entities that need access to a space join the space as members.
Members can join a space as a seeder or as a leech:
- Seeders
Seeder applications join the space and indicate their willingness to lend some of the resources of the host where they are deployed to scale the service provided by ActiveSpaces. In effect, the seeding applications have a portion of the Space embedded in their process. - Leeches
An application can also join a space as a leech, without contributing any of its host's resources to the scalability of the space, and without experiencing any limitation in functionality or in its ability to use the space. A leech (as opposed to a seeder) is a peer of the space that is not considered by the distribution algorithm and therefore can join or leave the space without causing redistribution of the data. - ActiveSpacesSerializer
The default serializer used to deserialize ActiveSpaces tuple to a simple event in TIBCO BusinessEvents and to serialize an event in TIBCO BusinessEvents to an ActiveSpaces tuple. You must configure the serializer (com.tibco.cep.driver.as.serializers.ActiveSpacesSerializer) for every destination created on the ActiveSpaces channel. - Distribution role
- Consumption mode
ActiveSpaces can proactively notify applications of changes to the tuples stored in a space. You can choose one of the consumption modes: Event Listener, Entry Browser, or Router. - Tuple
A tuple is similar to a row in a database table: it is a container for data. Specifically, it is a sequence of named elements called fields (similar to the columns in a database table) that contain values of a specific type. Each tuple in a space represents a set of related data. - Filters
Filters can be applied to both listeners and browsers, and also be used to evaluate a tuple against a filter. Filters allow your application to further refine the set of tuples it wants to work with using a space browser or event listener. - Operators Supported in Filters
- Formats for Filter Values
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