kafka provider template

wasm-component-template/kafka-component-stream/wit/deps/wasmcloud-messaging-0.2.0/package.wit

@@ -0,0 +1,29 @@
+package wasmcloud:messaging@0.2.0;
+
+/// Types common to message broker interactions
+interface types {
+  /// A message sent to or received from a broker
+  record broker-message {
+    subject: string,
+    body: list<u8>,
+    reply-to: option<string>,
+  }
+}
+
+interface handler {
+  use types.{broker-message};
+
+  /// Callback handled to invoke a function when a message is received from a subscription
+  handle-message: func(msg: broker-message) -> result<_, string>;
+}
+
+interface consumer {
+  use types.{broker-message};
+
+  /// Perform a request operation on a subject
+  request: func(subject: string, body: list<u8>, timeout-ms: u32) -> result<broker-message, string>;
+
+  /// Publish a message to a subject without awaiting a response
+  publish: func(msg: broker-message) -> result<_, string>;
+}
+