Struct persistent::Write
[−]
[src]
pub struct Write<P: Key> {
// some fields omitted
}Middleware for data that persists between Requests for data which mostly needs to be written instead of read.
The data is stored behind a Mutex, so only one request at a time can
access the data. This is more performant than State in the case where
most uses of the data require a write lock.
Write can be linked as BeforeMiddleware to add data to the Request
extensions and it can be linked as an AfterMiddleware to add data to
the Response extensions.
Write also implements Plugin, so the data stored within can be
accessed through request.get::<Write<P>>() as an Arc<Mutex<P::Value>>.
Methods
impl<P: Key> Write<P> where P::Value: Send
fn both(start: P::Value) -> (Write<P>, Write<P>)
Construct a new pair of Write that can be passed directly to Chain::link.
The data is initialized with the passed-in value.
fn one(start: P::Value) -> Write<P>
Construct a new Write that can be passed directly to
Chain::link_before or Chain::link_after.
The data is initialized with the passed-in value.