kafka provider template

wasm-component-template/kafka-component-stream/wit/deps/wasi-logging-0.1.0-draft/package.wit

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+package wasi:logging@0.1.0-draft;
+
+/// WASI Logging is a logging API intended to let users emit log messages with
+/// simple priority levels and context values.
+interface logging {
+  /// A log level, describing a kind of message.
+  enum level {
+    /// Describes messages about the values of variables and the flow of
+    /// control within a program.
+    trace,
+    /// Describes messages likely to be of interest to someone debugging a
+    /// program.
+    debug,
+    /// Describes messages likely to be of interest to someone monitoring a
+    /// program.
+    info,
+    /// Describes messages indicating hazardous situations.
+    warn,
+    /// Describes messages indicating serious errors.
+    error,
+    /// Describes messages indicating fatal errors.
+    critical,
+  }
+
+  /// Emit a log message.
+  ///
+  /// A log message has a `level` describing what kind of message is being
+  /// sent, a context, which is an uninterpreted string meant to help
+  /// consumers group similar messages, and a string containing the message
+  /// text.
+  log: func(level: level, context: string, message: string);
+}
+
+world imports {
+  import logging;
+}

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

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+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>;
+}
+

wasm-component-template/kafka-component-stream/wit/world.wit

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+package wasmcloud:hello;
+
+world hello {
+  import wasi:logging/logging@0.1.0-draft;
+  import wasmcloud:messaging/consumer@0.2.0;
+
+  export wasmcloud:messaging/handler@0.2.0;
+}