* Change `client::{future, sync}, server::{future, sync}` to `future::{client, server}, sync::{client, server}`
This reflects the most common usage pattern and allows for some types to not need to be fully qualified when used together (e.g. the previously-named `client::future::Options` and `server::future::Options` can now be `client::Options` and `server::Options`).
* sync::client: create a RequestHandler struct to encapsulate logic of processing client requests.
The largest benefit is that unit testing becomes easier, e.g. testing that the request processing stops when all request senders are dropped.
* Rename Serialize error variants to make sense.
* Rename tarpc_service_ConnectFuture__ => Connect (because it's public)
* Use tokio proto's ClientProxy.
Rather than reimplement the same logic. Curiously, this commit
isn't a net loss in LOC. Oh well.
* Factor out os-specific functionality in listener() into their own fns
* Remove service-fn dep
* Add server::Handle::shutdown
* Hybrid approach: lameduck + total shutdown when all clients disconnect.
* The future handle has addr() and shutdown(), but not run().
* Return a concrete type from `server::listen`.
* Change `FutureServiceExt::listen` to return `(SocketAddr, Listen)`, where `Listen` is a struct created by the `service!` macro that `impls Future<Item=(), Error=()>` and represents server execution.
* Disable `conservative_impl_trait` as it's no longer used.
* Update `FutureServiceExt` doc comment.
* Update `SyncServiceExt` doc comment. Also annotate `server::Handle` with `#[must_use]`.
* `cargo fmt`
* Make a reactor handle mandatory for server.
This removes the Send bound from FutureService. The Send bound
is still required for SyncService, since clones are sent to
new threads for each request. (This is more fodder for the argument
that there should be a distinct Options struct for each combination of
async/sync and client/server.)
This commit also makes FutureService::listen return an io::Result
rather than a Future; the future was never really necessary and
had the unintended consequence of making SyncService::listen
deadlock when the options specified a handle (because that means
the reactor driving the service lives on the same thread that
SyncService is waiting on).
`SyncClient` is no longer `Clone` because it needs to create
a new `reactor::Core` when cloning. Tokio Clients are `Clone` but
they don't allow moving the cloned client onto a new reactor.
* Change pubsub to use Rc<Refcell<>> instead of Arc<Mutex<>>.
This is possible since services no longer need to be Send.
* Remove some unnecessary unstable features.
There 3 remaining unstable features. The hardest to remove is plugin, because
we rely on compiler plugins to rewrite types from snake case to camel. It's
possible this can be removed before the proc macros rewrite lands if
impl Trait is extended to work with traits.
* Clean up example
* Sync servers now spawn a reactor on a thread. It's decided that
sync users should not have to know about tokio at all.
* Don't allow specifying a reactor::Core on client options.
* Fail fast in server::listen if local_addr() returns Err.
It's strictly more flexible, because everything that impls Future impls IntoFuture, and it
additionally allows returning types like Result. Which is nice.
