Add multi-raft extension support

Cargo.toml

@@ -33,6 +33,7 @@ default = [
 members = [
     "datacake-node",
     "datacake-eventual-consistency",
+    "datacake-multi-raft",
     "datacake-crdt",
     "datacake-sqlite",
     "datacake-rpc",

datacake-multi-raft/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "datacake-multi-raft"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tracing = "0.1.36"
+bytecheck = "0.6.9"
+thiserror = "1"
+flume = "0.10.14"
+slog = "2.7.0"
+
+puppet = { version = "0.4.0", default-features = false }
+raft = { git = "https://github.com/lnx-search/raft-rs.git", default-features = false, features = ["protobuf-codec"] }
+tokio = { version = "1", default-features = false, features = ["sync", "time"] }
+rkyv = { version = "0.7.9", features = ["validation"] }
+
+datacake-rpc = { path = "../datacake-rpc", version = "0.2" }
+datacake-node = { path = "../datacake-node", version = "0.1" }
+datacake-crdt = { path = "../datacake-crdt", version = "0.3", features = ["rkyv-support"] }

datacake-multi-raft/src/lib.rs

@@ -0,0 +1,5 @@
+mod membership;
+mod node;
+
+
+

datacake-multi-raft/src/membership.rs

@@ -0,0 +1,13 @@
+
+#[derive(Debug)]
+/// The type of membership behaviour the cluster should exhibit.
+pub enum MembershipMode {
+    /// Uses a fixed subset of nodes within the system to create the raft cluster.
+    Fixed(Vec<String>),
+    /// Similar to [MembershipMode::Fixed] however, this allows for dynamic adding
+    /// and removal of nodes from the cluster.
+    Dynamic(Vec<String>),
+    /// Automatically include all nodes in the system and add nodes which join the
+    /// cluster.
+    Auto,
+}