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Index: src/main.rs
===================================================================
--- src/main.rs
+++ src/main.rs
@@ -20,10 +20,13 @@
#[macro_use]
extern crate router;
+extern crate sqlite3;
+
/* -------------------------------------------------------------
Modules
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+mod store;
mod http_server;
mod web_handlers;
Index: src/store.rs
===================================================================
--- /dev/null
+++ src/store.rs
@@ -0,0 +1,194 @@
+/* -------------------------------------------------------------
+ Servers log microservice
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+ Project: Nasqueron
+ Created: 2016-11-11
+ License: BSD-2-Clause
+ ------------------------------------------------------------- */
+
+use sqlite3::DatabaseConnection;
+use sqlite3::SqliteResult;
+use sqlite3::StatementUpdate;
+use sqlite3::ToSql;
+use sqlite3::access::ByFilename;
+
+use std::env;
+use std::fs;
+use std::io;
+
+/* -------------------------------------------------------------
+ Log entry
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+pub struct LogEntry {
+ date: String,
+ emitter: String,
+ source: String,
+ component: String,
+ entry: String,
+}
+
+/* -------------------------------------------------------------
+ Data store context
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+pub struct DataStore {
+ /// The path to the SQLite database filename
+ filename: String,
+
+ /// The connexion to the database
+ connection: DatabaseConnection,
+}
+
+impl DataStore {
+ /// Initializes a new instance of the DataStore object.
+ pub fn new () -> Result<DataStore, String> {
+ let path = ::store::get_path();
+ match ::store::get_connection() {
+ Ok(database_connection) => {
+ let mut store = DataStore {
+ filename: path,
+ connection: database_connection
+ };
+ store.init();
+ Ok(store)
+ },
+ Err(err) => Err(err.desc.to_string())
+ }
+ }
+
+ /// Initializes the data store.
+ pub fn init(&mut self) {
+ self.connection.exec(::store::get_schema()).unwrap();
+ }
+
+ /// Destroys the data store.
+ pub fn destroy (&self) -> Result<(), io::Error> {
+ try!(fs::remove_file(&*self.filename));
+ info!("Destroyed {}", self.filename);
+ Ok(())
+ }
+
+ /// Executes a prepared statement.
+ /// - query: the SQL query, each parameter replaced by $1, $2, etc.
+ /// - parameters: the parameters to put in the query
+ pub fn exec_prepared_statement (&self, query: &str, parameters: &[&ToSql]) -> Result<u64, String> {
+ match self.connection.prepare(query).unwrap().update(parameters) {
+ Ok(rows_updated) => Ok(rows_updated),
+ Err(err) => Err(err.desc.to_string()),
+ }
+ }
+
+ /// Inserts an entry to the log.
+ pub fn insert (&self, entry: LogEntry) -> Result<u64, String> {
+ self.exec_prepared_statement(
+ "INSERT INTO log (date, emitter, source, component, entry)
+ VALUES ($1, $2, $3, $4, $5);",
+ &[&entry.date, &entry.emitter, &entry.source, &entry.component, &entry.entry]
+ )
+ }
+}
+
+/* -------------------------------------------------------------
+ Helper functions — Database
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+/// Opens a connection to the database.
+fn get_connection () -> SqliteResult<DatabaseConnection> {
+ let path = &*get_path();
+ info!("Open database {}", path);
+
+ DatabaseConnection::new(
+ ByFilename {
+ filename: path,
+ flags: Default::default(),
+ }
+ )
+}
+
+/// Gets the SQL tables schema for the log store.
+pub fn get_schema<'a> () -> &'a str {
+ include_str!("../sql/schema.sql")
+}
+
+/* -------------------------------------------------------------
+ Helper functions
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+/// Gets the path to the store to use.
+fn get_path() -> String {
+ env::var("STORE").unwrap_or("log.db".to_string())
+}
+
+/* -------------------------------------------------------------
+ Tests
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+#[cfg(test)]
+mod tests {
+
+ use super::get_path;
+ use super::get_schema;
+ use super::DataStore;
+ use super::LogEntry;
+
+ use std::path::Path;
+
+ //
+ // SQL schema tests
+ //
+
+ #[test]
+ fn get_schema_creates_a_table() {
+ assert!(get_schema().contains("CREATE TABLE"))
+ }
+
+ #[test]
+ fn get_schema_wont_fail_if_table_already_exists() {
+ assert!(get_schema().contains("IF NOT EXISTS"))
+ }
+
+ //
+ // SQLite file tests
+ //
+
+ /// Determines if the store exists.
+ fn store_exists () -> bool {
+ Path::new(&get_path()).exists()
+ }
+
+ #[test]
+ fn get_store_path_returns_expected_default_value() {
+ assert_eq!("log.db", get_path());
+ }
+
+ #[test]
+ fn store_exists_when_initialized_but_not_after_destroy() {
+ let store = DataStore::new().unwrap();
+ assert_eq!(true, store_exists(), "Store doesn't exist after initialization.");
+
+ store.destroy().unwrap();
+ assert_eq!(false, store_exists(), "Store still exists after being destroyed.");
+ }
+
+
+ //
+ // CRUD tests
+ //
+
+ #[test]
+ fn insert_adds_a_row() {
+ let store = DataStore::new().unwrap();
+ let rows_updated = store.insert(
+ LogEntry {
+ date: String::from("2016-03-30T13:03:00Z"),
+ emitter: String::from("Sandlayth"),
+ source: String::from("#nasqueron-ops"),
+ component: String::from("Dwellers"),
+ entry: String::from("docker start wolfphab"),
+ }
+ ).unwrap();
+ assert_eq!(1, rows_updated);
+ }
+
+}

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