huge refactor of rust modules/files

Taking advantage of new Rust 2018 crate/module path changes, and
re-organizing things. Somewhat optimistic this could help with partial
rebuild speed also.

1 files changed, 81 insertions, 0 deletions

diff --git a/rust/src/server.rs b/rust/src/server.rs
new file mode 100644
index 00000000..70e667be
--- /dev/null
+++ b/rust/src/server.rs
@@ -0,0 +1,81 @@
+//! API endpoint handlers
+
+use crate::auth::*;
+use crate::errors::*;
+use chrono;
+use diesel;
+use diesel::pg::PgConnection;
+use diesel::r2d2::ConnectionManager;
+use dotenv::dotenv;
+use rand::Rng;
+use std::process::Command;
+use std::{env, thread, time};
+
+#[cfg(feature = "postgres")]
+embed_migrations!("../migrations/");
+
+pub type ConnectionPool = diesel::r2d2::Pool<ConnectionManager<diesel::pg::PgConnection>>;
+
+pub type DbConn =
+    diesel::r2d2::PooledConnection<diesel::r2d2::ConnectionManager<diesel::PgConnection>>;
+
+/// Instantiate a new API server with a pooled database connection
+pub fn database_worker_pool() -> Result<ConnectionPool> {
+    dotenv().ok();
+    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
+    let manager = ConnectionManager::<PgConnection>::new(database_url);
+    let pool = diesel::r2d2::Pool::builder()
+        .build(manager)
+        .expect("Failed to create database pool.");
+    Ok(pool)
+}
+
+#[derive(Clone)]
+pub struct Server {
+    pub db_pool: ConnectionPool,
+    pub auth_confectionary: AuthConfectionary,
+}
+
+/// Instantiate a new API server with a pooled database connection
+pub fn create_server() -> Result<Server> {
+    dotenv().ok();
+    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
+    let manager = ConnectionManager::<PgConnection>::new(database_url);
+    let pool = diesel::r2d2::Pool::builder()
+        .build(manager)
+        .expect("Failed to create database pool.");
+    let confectionary = env_confectionary()?;
+    Ok(Server {
+        db_pool: pool,
+        auth_confectionary: confectionary,
+    })
+}
+
+/// Generates a server for testing. Calls an external bash script to generate a random postgres
+/// database, which will be unique to this process but common across threads and connections. The
+/// database will automagically get cleaned up (deleted) after 60 seconds.
+/// Currently, start times are staggered by up to 200ms to prevent internal postgres concurrency
+/// errors; if this fails run the tests serially (one at a time), which is slower but more robust.
+/// CI should run tests serially.
+pub fn create_test_server() -> Result<Server> {
+    dotenv().ok();
+    // sleep a bit so we don't have thundering herd collisions, resuliting in
+    // "pg_extension_name_index" or "pg_proc_proname_args_nsp_index" or "pg_type_typname_nsp_index"
+    // duplicate key violations.
+    thread::sleep(time::Duration::from_millis(
+        rand::thread_rng().gen_range(0, 200),
+    ));
+    let pg_tmp = Command::new("./tests/pg_tmp.sh")
+        .output()
+        .expect("run ./tests/pg_tmp.sh to get temporary postgres DB");
+    let database_url = String::from_utf8_lossy(&pg_tmp.stdout).to_string();
+    env::set_var("DATABASE_URL", database_url);
+
+    let mut server = create_server()?;
+    server.auth_confectionary = AuthConfectionary::new_dummy();
+    let conn = server.db_pool.get().expect("db_pool error");
+
+    // run migrations; this is a fresh/bare database
+    diesel_migrations::run_pending_migrations(&conn).unwrap();
+    Ok(server)
+}