user particles

This section aims to provide an overview of the fundamental user particles of casual and their relationships.

That is, the entities that are involved from a user code perspective, during runtime.

particles

The following diagram illustrates the relationship between the user particles

resource

• Configuration of a specific resource

• servers and executables uses this to “connect” to resources (if they’re built with a resource)

group

• Groups server and executables.

• Dependencies to other groups

• Determine the boot and shutdown ordering

• Has 0..* resources dependencies, which give members of the group implicit dependencies

server

• executable that casual can communicate whith, i.e. it has a message pump.

• Scales with instances

• Is a member of 0..* groups.

• Has 0..* explicit resources dependencies

instance (server)

• Running process of a given server

• Advertises 0..* services

• Is a member of 0..* groups.

executable

• Arbitary executable

• casual communicates only with SIGINT to shutdown the executable

• Has 0..* explicit resources dependencies

instance (executable)

• Running process of a given executable

service

• XATMI service

• entry point for 0..* instances (that could be from different servers)