Brought in SQL statements to create the tables

src/bin/data_node.rs

@@ -2,5 +2,4 @@ extern crate a03;
 
 use a03::*;
 
-fn main() {
-}
+fn main() {}

src/bin/ls.rs

@@ -1,4 +1,3 @@
-
 fn main() {
     println!("Hello, world!");
 }

src/bin/meta_data.rs

@@ -1,7 +1,9 @@
 extern crate a03;
 extern crate rusqlite;
+#[macro_use]
+extern crate serde_json;
 
-use a03::*;
+// use a03::*;
 use rusqlite::types::ToSql;
 use rusqlite::{Connection, NO_PARAMS};
 
@@ -10,52 +12,97 @@ fn main() {
 }
 
 #[derive(Debug)]
-struct Dnode {
+struct DataNode {
+    id: i32,
+    address: String,
+    port: i32,
+}
+
+#[derive(Debug)]
+struct INode {
+    id: i32,
+    name: String,
+    size: i32,
+}
+
+#[derive(Debug)]
+struct Block {
     id : i32,
-    address : String,
-    port : i32,
+    file_id : i32,
+    node_id : i32,
+    c_id : String,
 }
 
-fn create_tables(conn : &Connection) {
+fn create_tables(conn: &Connection) {
     conn.execute(
-    	"CREATE TABLE dnode (nid INTEGER PRIMARY KEY ASC AUTOINCREMENT, address TEXT NOT NULL DEFAULT \" \", port INTEGER NOT NULL DEFAULT \"0\")",
-    	NO_PARAMS);
+        "CREATE TABLE inode (
+fid INTEGER PRIMARY KEY ASC AUTOINCREMENT,
+fname TEXT UNIQUE NOT NULL DEFAULT \" \",
+fsize INTEGER NOT NULL default \"0\")",
+        NO_PARAMS,
+    ).unwrap();
+
+    conn.execute(
+        "CREATE TABLE dnode (
+nid INTEGER PRIMARY KEY ASC AUTOINCREMENT,
+address TEXT NOT NULL DEFAULT \" \",
+port INTEGER NOT NULL DEFAULT \"0\")",
+        NO_PARAMS,
+    ).unwrap();
+
+    conn.execute(
+        "CREATE TABLE block (
+bid INTEGER PRIMARY KEY ASC AUTOINCREMENT,
+fid INTEGER NOT NULL DEFAULT \"0\",
+nid INTEGER NOT NULL DEFAULT \"0\",
+cid TEXT NOT NULL DEFAULT \"0\")",
+        NO_PARAMS,
+    ).unwrap();
+
+    // Create UNIQUE tuple for block
+    conn.execute("CREATE UNIQUE INDEX blocknc ON block(nid, cid)", NO_PARAMS)
+        .unwrap();
 }
 
-fn add_data_node(conn : &Connection, address : &str, port : i32) {
-    let dn = Dnode {
-        id : 0,
-        address : address.to_string(),
-        port,
-    };
+fn add_data_node(conn: &Connection, address: &str, port: i32) {
     match conn.execute(
         "INSERT INTO dnode (address, port) VALUES (?1, ?2)",
-        &[&dn.address as &ToSql, &dn.port]) {
+        &[&address as &ToSql, &port],
+    ) {
         Ok(n) => println!("{} rows updated", n),
-        Err(e) => println!("INSERT error: {}", e)
+        Err(e) => println!("INSERT error: {}", e),
+    };
+}
+
+fn check_node(conn: &Connection, address: &str, port: i32) -> DataNode {
+    let mut stmt = conn
+        .prepare("SELECT nid, address, port FROM dnode WHERE address=?1 AND port=?2")
+        .unwrap();
+    stmt.query_row(
+        &[&address as &ToSql, &port],
+        |row| DataNode {
+            id: row.get(0),
+            address: row.get(1),
+            port: row.get(2),
+        })
+        .unwrap()
+}
+
+ fn get_data_nodes(conn: &Connection) {
+     let mut stmt = conn.prepare("SELECT address, port FROM dnode WHERE 1");
  }
-}
 
-fn check_node(conn : Connection, address : String, port : usize) {
-}
+ fn insert_file(conn: &Connection, fname: String, fsize: usize) {
+     let mut stmt = conn.prepare("INSERT INTO inode (fname, fsize) VALUES (\"?1\", ?2)");
+ }
 
-fn get_data_nodes(conn : Connection) {
-}
+// fn get_file_info(conn: &Connection, fname: String) {}
 
-fn insert_file(conn : Connection, fname : String, fsize : usize) {
-}
+// fn get_files(conn: &Connection) {}
 
-fn get_file_info(conn : Connection, fname : String) {
-}
+// fn add_block_to_inode(conn: &Connection, fname: String, blocks: usize) {}
 
-fn get_files(conn : Connection) {
-}
-
-fn add_block_to_inode(conn : Connection, fname : String, blocks : usize) {
-}
-
-fn get_file_inode(conn : Connection, fname : String) {
-}
+// fn get_file_inode(conn: &Connection, fname: String) {}
 
 #[cfg(test)]
 mod tests {
@@ -68,20 +115,14 @@ mod tests {
     }
 
     #[test]
-    fn inserts_dnode() {
+    fn inserts_dnode_with_correct_ip_and_port() {
         let conn = get_test_db();
-        add_data_node(&conn, "127.0.0.1", 65533);
-        let mut stmt = conn.prepare("SELECT * FROM dnode").unwrap();
-        let result = stmt.query_map(
-            NO_PARAMS, |row| Dnode {
-                id : row.get(0), address : row.get(1), port : row.get(2),
-            }).unwrap();
-        for d in result {
-            let dnode = d.unwrap();
+        let ip = "127.0.0.1";
+        add_data_node(&conn, &ip, 65533);
+        let dnode = check_node(&conn, &ip, 65533);
         assert_eq!(dnode.id, 1);
-            assert_eq!(dnode.address, "127.0.0.1");
+        assert_eq!(dnode.address, ip);
         assert_eq!(dnode.port, 65533);
     }
-    }
 
 }

src/lib.rs

@@ -1 +1,2 @@
-
+#[macro_use]
+extern crate serde_json;