Contents specifies how user-defined contents need to be serializable and mergeable.
The user need to provide:
to_json and of_json functions, to be used by the REST interface.size_of, write and read functions, to serialize data on disk or to send it over the network.merge function, to handle conflicts between multiple versions of the same contents.Default contents for idempotent string, JSON and C-buffers like values are provided.
module type S0 = sig ... endBase Contents
module type Conv = sig ... endConv is the signature for contents which can be converted back and forth from the command-line.
module type S = sig ... endString values where only the last modified value is kept on merge. If the value has been modified concurrently, the merge function conflicts. Assume that update operations are idempotent.
Cstruct values where only the last modified value is kept on merge. If the value has been modified concurrently, the merge function conflicts. Assume that update operations are idempotent.
module type STORE = sig ... endContents store.