THRIFT-2945 Add Rust support
Client: Rust
Patch: Allen George <allen.george@gmail.com>
This closes #1147
diff --git a/lib/rs/src/transport/passthru.rs b/lib/rs/src/transport/passthru.rs
new file mode 100644
index 0000000..60dc3a6
--- /dev/null
+++ b/lib/rs/src/transport/passthru.rs
@@ -0,0 +1,73 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+use std::cell::RefCell;
+use std::rc::Rc;
+use std::io;
+use std::io::{Read, Write};
+
+use super::TTransport;
+
+/// Proxy that wraps an inner `TTransport` and delegates all calls to it.
+///
+/// Unlike other `TTransport` wrappers, `TPassThruTransport` is generic with
+/// regards to the wrapped transport. This allows callers to use methods
+/// specific to the type being wrapped instead of being constrained to methods
+/// on the `TTransport` trait.
+///
+/// # Examples
+///
+/// Create and use a `TPassThruTransport`.
+///
+/// ```no_run
+/// use std::cell::RefCell;
+/// use std::rc::Rc;
+/// use thrift::transport::{TPassThruTransport, TTcpTransport};
+///
+/// let t = TTcpTransport::new();
+/// let t = TPassThruTransport::new(Rc::new(RefCell::new(Box::new(t))));
+///
+/// // since the type parameter is maintained, we are able
+/// // to use functions specific to `TTcpTransport`
+/// t.inner.borrow_mut().open("localhost:9090").unwrap();
+/// ```
+pub struct TPassThruTransport<I: TTransport> {
+ pub inner: Rc<RefCell<Box<I>>>,
+}
+
+impl<I: TTransport> TPassThruTransport<I> {
+ /// Create a `TPassThruTransport` that wraps an `inner` TTransport.
+ pub fn new(inner: Rc<RefCell<Box<I>>>) -> TPassThruTransport<I> {
+ TPassThruTransport { inner: inner }
+ }
+}
+
+impl<I: TTransport> Read for TPassThruTransport<I> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.borrow_mut().read(buf)
+ }
+}
+
+impl<I: TTransport> Write for TPassThruTransport<I> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.borrow_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.borrow_mut().flush()
+ }
+}