Implement base operator (#1)

Add base operator logic

Reviewed-on: #1

src/minio_test_server.rs

@@ -0,0 +1,117 @@
+//! # Minio server controller
+//!
+//! Used for testing only
+
+use crate::minio::MinioService;
+use crate::utils::rand_str;
+use rand::RngCore;
+use std::io::ErrorKind;
+use std::process::{Child, Command};
+use std::time::Duration;
+
+pub struct MinioTestServer {
+    #[allow(dead_code)]
+    storage_base_dir: mktemp::Temp,
+    child: Child,
+    pub api_port: u16,
+    pub root_user: String,
+    pub root_password: String,
+}
+
+impl MinioTestServer {
+    pub async fn start() -> anyhow::Result<Self> {
+        let storage_dir = mktemp::Temp::new_dir()?;
+
+        let root_user = rand_str(30);
+        let root_password = rand_str(30);
+        let api_port = (2000 + rand::thread_rng().next_u64() % 5000) as u16;
+        log::info!(
+            "Spwan a new Minio server on port {} with root credentials {}:{}",
+            api_port,
+            root_user,
+            root_password
+        );
+
+        let child = Command::new("minio")
+            .current_dir(storage_dir.clone())
+            .arg("server")
+            .arg("--address")
+            .arg(format!(":{api_port}"))
+            .arg(storage_dir.to_str().unwrap())
+            .env("MINIO_ROOT_USER", &root_user)
+            .env("MINIO_ROOT_PASSWORD", &root_password)
+            .spawn()?;
+
+        let instance = Self {
+            storage_base_dir: storage_dir,
+            child,
+            api_port,
+            root_user,
+            root_password,
+        };
+
+        // Wait for Minio to become ready
+        std::thread::sleep(Duration::from_millis(500));
+        let mut check_count = 0;
+        loop {
+            if check_count >= 100 {
+                log::error!("Minio failed to respond properly in time!");
+                return Err(std::io::Error::new(
+                    ErrorKind::Other,
+                    "Minio failed to respond in time!",
+                )
+                .into());
+            }
+            check_count += 1;
+
+            std::thread::sleep(Duration::from_millis(100));
+
+            if instance.as_service().is_ready().await {
+                break;
+            }
+        }
+
+        Ok(instance)
+    }
+
+    pub fn base_url(&self) -> String {
+        format!("http://127.0.0.1:{}", self.api_port)
+    }
+
+    /// Get a MinioService instance of this temporary server
+    pub fn as_service(&self) -> MinioService {
+        MinioService {
+            hostname: self.base_url(),
+            access_key: self.root_user.clone(),
+            secret_key: self.root_password.clone(),
+        }
+    }
+}
+
+impl Drop for MinioTestServer {
+    fn drop(&mut self) {
+        if let Err(e) = self.child.kill() {
+            log::error!("Failed to kill child server! {}", e);
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use crate::minio_test_server::MinioTestServer;
+
+    #[tokio::test]
+    async fn start_minio() {
+        let _ = env_logger::builder().is_test(true).try_init();
+
+        let server = MinioTestServer::start().await.unwrap();
+        let service = server.as_service();
+        println!("{:?}", service);
+
+        assert!(service.is_ready().await);
+
+        // Check if minio properly exit
+        drop(server);
+        assert!(!service.is_ready().await);
+    }
+}