add logging; update readme

Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Fluence Labs"]
 edition = "2018"
 
 [lib]
-name = "multi_module_example"
+name = "mm"
 path = "src/lib.rs"
 crate-type = ["cdylib"]
 

README.md

@@ -32,15 +32,15 @@ $> module successfully registered in Frank
 Finally, you could execute requests inside FCE CLI:
 
 ```bush
->> execute redis SET A 1
+$> >> execute redis SET A 1
 result: +OK
->> execute redis GET A
+$> >> execute redis GET A
 result: $1
 1
->> execute sqlite CREATE VIRTUAL TABLE users USING FTS5(body)
+$> >> execute sqlite CREATE VIRTUAL TABLE users USING FTS5(body)
 result: OK
->> execute sqlite INSERT INTO users(body) VALUES('AB'), ('BC'), ('CD'), ('DE')
+$> >> execute sqlite INSERT INTO users(body) VALUES('AB'), ('BC'), ('CD'), ('DE')
 result: OK
->> execute sqlite SELECT * FROM users WHERE users MATCH 'A* OR B*'
+$> >> execute sqlite SELECT * FROM users WHERE users MATCH 'A* OR B*'
 result: AB|BC
 ```

src/lib.rs

@@ -4,18 +4,24 @@ fn init() {
     logger::WasmLogger::init_with_level(log::Level::Info).unwrap();
 }
 
-#[invocation_handler(init_fn = init, side_modules = (sqlite, redis))]
+#[invocation_handler(init_fn = init, side_modules = (redis, sqlite))]
 fn run(arg: String) -> Vec<u8> {
     let cmd: Vec<_> = arg.split(" ").collect();
     if cmd.len() < 2 {
-        return "incorrect command".as_bytes().to_vec();
+        return "please specify module and argument".as_bytes().to_vec();
     }
 
     let arg = cmd[1..].join(" ");
 
     match cmd[0] {
-        "redis" => redis::call(arg.as_bytes()),
-        "sqlite" => sqlite::call(arg.as_bytes()),
+        "redis" => {
+            log::info!("calling redis");
+            redis::call(arg.as_bytes())
+        },
+        "sqlite" => {
+            log::info!("calling sqlite");
+            sqlite::call(arg.as_bytes())
+        },
         _ => "unknown_command".as_bytes().to_vec(),
     }
 }