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< / pre > < pre class = "rust" >
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< span class = "kw" > use< / span > < span class = "ident" > std::collections::VecDeque< / span > ;
< span class = "kw" > use< / span > < span class = "ident" > std::io< / span > ;
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< span class = "kw" > use< / span > < span class = "ident" > actix::prelude< / span > ::< span class = "kw-2" > *< / span > ;
< span class = "kw" > use< / span > < span class = "ident" > actix_rt::net::TcpStream< / span > ;
< span class = "kw" > use< / span > < span class = "ident" > actix_service::boxed< / span > ::{< span class = "ident" > service< / span > , < span class = "ident" > BoxService< / span > };
< span class = "kw" > use< / span > < span class = "ident" > actix_tls::connect< / span > ::{< span class = "ident" > default_connector< / span > , < span class = "ident" > Connect< / span > , < span class = "ident" > ConnectError< / span > , < span class = "ident" > Connection< / span > };
< span class = "kw" > use< / span > < span class = "ident" > backoff::backoff::Backoff< / span > ;
< span class = "kw" > use< / span > < span class = "ident" > backoff::ExponentialBackoff< / span > ;
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< span class = "kw" > use< / span > < span class = "ident" > log< / span > ::{< span class = "ident" > error< / span > , < span class = "ident" > info< / span > , < span class = "ident" > warn< / span > };
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< span class = "kw" > use< / span > < span class = "ident" > redis_async::error::Error< / span > < span class = "kw" > as< / span > < span class = "ident" > RespError< / span > ;
< span class = "kw" > use< / span > < span class = "ident" > redis_async::resp< / span > ::{< span class = "ident" > RespCodec< / span > , < span class = "ident" > RespValue< / span > };
< span class = "kw" > use< / span > < span class = "ident" > tokio::io< / span > ::{< span class = "ident" > split< / span > , < span class = "ident" > WriteHalf< / span > };
< span class = "kw" > use< / span > < span class = "ident" > tokio::sync::oneshot< / span > ;
< span class = "kw" > use< / span > < span class = "ident" > tokio_util::codec::FramedRead< / span > ;
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< span class = "kw" > use< / span > < span class = "kw" > crate< / span > < span class = "ident" > ::Error< / span > ;
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< span class = "doccomment" > /// Command for send data to Redis< / span >
< span class = "attribute" > #[< span class = "ident" > derive< / span > (< span class = "ident" > Debug< / span > )]< / span >
< span class = "kw" > pub< / span > < span class = "kw" > struct< / span > < span class = "ident" > Command< / span > (< span class = "kw" > pub< / span > < span class = "ident" > RespValue< / span > );
< span class = "kw" > impl< / span > < span class = "ident" > Message< / span > < span class = "kw" > for< / span > < span class = "ident" > Command< / span > {
< span class = "kw" > type< / span > < span class = "prelude-ty" > Result< / span > < span class = "op" > =< / span > < span class = "prelude-ty" > Result< / span > < span class = "op" > < < / span > < span class = "ident" > RespValue< / span > , < span class = "ident" > Error< / span > < span class = "op" > > < / span > ;
}
< span class = "doccomment" > /// Redis communication actor< / span >
< span class = "kw" > pub< / span > < span class = "kw" > struct< / span > < span class = "ident" > RedisActor< / span > {
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< span class = "ident" > addr< / span > : < span class = "ident" > String< / span > ,
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< span class = "ident" > connector< / span > : < span class = "ident" > BoxService< / span > < span class = "op" > < < / span > < span class = "ident" > Connect< / span > < span class = "op" > < < / span > < span class = "ident" > String< / span > < span class = "op" > > < / span > , < span class = "ident" > Connection< / span > < span class = "op" > < < / span > < span class = "ident" > String< / span > , < span class = "ident" > TcpStream< / span > < span class = "op" > > < / span > , < span class = "ident" > ConnectError< / span > < span class = "op" > > < / span > ,
< span class = "ident" > backoff< / span > : < span class = "ident" > ExponentialBackoff< / span > ,
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< span class = "ident" > cell< / span > : < span class = "prelude-ty" > Option< / span > < span class = "op" > < < / span > < span class = "ident" > actix::io::FramedWrite< / span > < span class = "op" > < < / span > < span class = "ident" > RespValue< / span > , < span class = "ident" > WriteHalf< / span > < span class = "op" > < < / span > < span class = "ident" > TcpStream< / span > < span class = "op" > > < / span > , < span class = "ident" > RespCodec< / span > < span class = "op" > > < / span > < span class = "op" > > < / span > ,
< span class = "ident" > queue< / span > : < span class = "ident" > VecDeque< / span > < span class = "op" > < < / span > < span class = "ident" > oneshot::Sender< / span > < span class = "op" > < < / span > < span class = "prelude-ty" > Result< / span > < span class = "op" > < < / span > < span class = "ident" > RespValue< / span > , < span class = "ident" > Error< / span > < span class = "op" > > < / span > < span class = "op" > > < / span > < span class = "op" > > < / span > ,
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}
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< span class = "kw" > impl< / span > < span class = "ident" > RedisActor< / span > {
< span class = "doccomment" > /// Start new `Supervisor` with `RedisActor`.< / span >
< span class = "kw" > pub< / span > < span class = "kw" > fn< / span > < span class = "ident" > start< / span > < span class = "op" > < < / span > < span class = "ident" > S< / span > : < span class = "ident" > Into< / span > < span class = "op" > < < / span > < span class = "ident" > String< / span > < span class = "op" > > < / span > < span class = "op" > > < / span > (< span class = "ident" > addr< / span > : < span class = "ident" > S< / span > ) < span class = "op" > -< / span > < span class = "op" > > < / span > < span class = "ident" > Addr< / span > < span class = "op" > < < / span > < span class = "ident" > RedisActor< / span > < span class = "op" > > < / span > {
< span class = "kw" > let< / span > < span class = "ident" > addr< / span > < span class = "op" > =< / span > < span class = "ident" > addr< / span > .< span class = "ident" > into< / span > ();
< span class = "kw" > let< / span > < span class = "ident" > backoff< / span > < span class = "op" > =< / span > < span class = "ident" > ExponentialBackoff< / span > {
< span class = "ident" > max_elapsed_time< / span > : < span class = "prelude-val" > None< / span > ,
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..< span class = "ident" > Default::default< / span > ()
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};
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< span class = "ident" > Supervisor::start< / span > (< span class = "op" > |< / span > < span class = "kw" > _< / span > < span class = "op" > |< / span > < span class = "ident" > RedisActor< / span > {
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< span class = "ident" > addr< / span > ,
< span class = "ident" > connector< / span > : < span class = "ident" > service< / span > (< span class = "ident" > default_connector< / span > ()),
< span class = "ident" > cell< / span > : < span class = "prelude-val" > None< / span > ,
< span class = "ident" > backoff< / span > ,
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< span class = "ident" > queue< / span > : < span class = "ident" > VecDeque::new< / span > (),
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})
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}
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}
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< span class = "kw" > impl< / span > < span class = "ident" > Actor< / span > < span class = "kw" > for< / span > < span class = "ident" > RedisActor< / span > {
< span class = "kw" > type< / span > < span class = "ident" > Context< / span > < span class = "op" > =< / span > < span class = "ident" > Context< / span > < span class = "op" > < < / span > < span class = "self" > Self< / span > < span class = "op" > > < / span > ;
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< span class = "kw" > fn< / span > < span class = "ident" > started< / span > (< span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "self" > self< / span > , < span class = "ident" > ctx< / span > : < span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "ident" > Context< / span > < span class = "op" > < < / span > < span class = "self" > Self< / span > < span class = "op" > > < / span > ) {
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< span class = "kw" > let< / span > < span class = "ident" > req< / span > < span class = "op" > =< / span > < span class = "ident" > Connect::new< / span > (< span class = "self" > self< / span > .< span class = "ident" > addr< / span > .< span class = "ident" > to_owned< / span > ());
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< span class = "self" > self< / span > .< span class = "ident" > connector< / span >
.< span class = "ident" > call< / span > (< span class = "ident" > req< / span > )
.< span class = "ident" > into_actor< / span > (< span class = "self" > self< / span > )
.< span class = "ident" > map< / span > (< span class = "op" > |< / span > < span class = "ident" > res< / span > , < span class = "ident" > act< / span > , < span class = "ident" > ctx< / span > < span class = "op" > |< / span > < span class = "kw" > match< / span > < span class = "ident" > res< / span > {
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< span class = "prelude-val" > Ok< / span > (< span class = "ident" > conn< / span > ) < span class = "op" > =< / span > < span class = "op" > > < / span > {
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< span class = "kw" > let< / span > < span class = "ident" > stream< / span > < span class = "op" > =< / span > < span class = "ident" > conn< / span > .< span class = "ident" > into_parts< / span > ().< span class = "number" > 0< / span > ;
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< span class = "macro" > info!< / span > (< span class = "string" > " Connected to redis server: {}" < / span > , < span class = "ident" > act< / span > .< span class = "ident" > addr< / span > );
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< span class = "kw" > let< / span > (< span class = "ident" > r< / span > , < span class = "ident" > w< / span > ) < span class = "op" > =< / span > < span class = "ident" > split< / span > (< span class = "ident" > stream< / span > );
< span class = "comment" > // configure write side of the connection< / span >
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< span class = "kw" > let< / span > < span class = "ident" > framed< / span > < span class = "op" > =< / span > < span class = "ident" > actix::io::FramedWrite::new< / span > (< span class = "ident" > w< / span > , < span class = "ident" > RespCodec< / span > , < span class = "ident" > ctx< / span > );
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< span class = "ident" > act< / span > .< span class = "ident" > cell< / span > < span class = "op" > =< / span > < span class = "prelude-val" > Some< / span > (< span class = "ident" > framed< / span > );
< span class = "comment" > // read side of the connection< / span >
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< span class = "ident" > ctx< / span > .< span class = "ident" > add_stream< / span > (< span class = "ident" > FramedRead::new< / span > (< span class = "ident" > r< / span > , < span class = "ident" > RespCodec< / span > ));
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< span class = "ident" > act< / span > .< span class = "ident" > backoff< / span > .< span class = "ident" > reset< / span > ();
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}
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< span class = "prelude-val" > Err< / span > (< span class = "ident" > err< / span > ) < span class = "op" > =< / span > < span class = "op" > > < / span > {
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< span class = "macro" > error!< / span > (< span class = "string" > " Can not connect to redis server: {}" < / span > , < span class = "ident" > err< / span > );
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< span class = "comment" > // re-connect with backoff time.< / span >
< span class = "comment" > // we stop current context, supervisor will restart it.< / span >
< span class = "kw" > if< / span > < span class = "kw" > let< / span > < span class = "prelude-val" > Some< / span > (< span class = "ident" > timeout< / span > ) < span class = "op" > =< / span > < span class = "ident" > act< / span > .< span class = "ident" > backoff< / span > .< span class = "ident" > next_backoff< / span > () {
< span class = "ident" > ctx< / span > .< span class = "ident" > run_later< / span > (< span class = "ident" > timeout< / span > , < span class = "op" > |< / span > < span class = "kw" > _< / span > , < span class = "ident" > ctx< / span > < span class = "op" > |< / span > < span class = "ident" > ctx< / span > .< span class = "ident" > stop< / span > ());
}
}
})
.< span class = "ident" > wait< / span > (< span class = "ident" > ctx< / span > );
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}
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}
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< span class = "kw" > impl< / span > < span class = "ident" > Supervised< / span > < span class = "kw" > for< / span > < span class = "ident" > RedisActor< / span > {
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< span class = "kw" > fn< / span > < span class = "ident" > restarting< / span > (< span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "self" > self< / span > , < span class = "kw" > _< / span > : < span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "self" > Self< / span > < span class = "ident" > ::Context< / span > ) {
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< span class = "self" > self< / span > .< span class = "ident" > cell< / span > .< span class = "ident" > take< / span > ();
< span class = "kw" > for< / span > < span class = "ident" > tx< / span > < span class = "kw" > in< / span > < span class = "self" > self< / span > .< span class = "ident" > queue< / span > .< span class = "ident" > drain< / span > (..) {
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< span class = "kw" > let< / span > < span class = "kw" > _< / span > < span class = "op" > =< / span > < span class = "ident" > tx< / span > .< span class = "ident" > send< / span > (< span class = "prelude-val" > Err< / span > (< span class = "ident" > Error::Disconnected< / span > ));
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}
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}
}
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< span class = "kw" > impl< / span > < span class = "ident" > actix::io::WriteHandler< / span > < span class = "op" > < < / span > < span class = "ident" > io::Error< / span > < span class = "op" > > < / span > < span class = "kw" > for< / span > < span class = "ident" > RedisActor< / span > {
< span class = "kw" > fn< / span > < span class = "ident" > error< / span > (< span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "self" > self< / span > , < span class = "ident" > err< / span > : < span class = "ident" > io::Error< / span > , < span class = "kw" > _< / span > : < span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "self" > Self< / span > < span class = "ident" > ::Context< / span > ) < span class = "op" > -< / span > < span class = "op" > > < / span > < span class = "ident" > Running< / span > {
< span class = "macro" > warn!< / span > (< span class = "string" > " Redis connection dropped: {} error: {}" < / span > , < span class = "self" > self< / span > .< span class = "ident" > addr< / span > , < span class = "ident" > err< / span > );
< span class = "ident" > Running::Stop< / span >
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}
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}
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< span class = "kw" > impl< / span > < span class = "ident" > StreamHandler< / span > < span class = "op" > < < / span > < span class = "prelude-ty" > Result< / span > < span class = "op" > < < / span > < span class = "ident" > RespValue< / span > , < span class = "ident" > RespError< / span > < span class = "op" > > < / span > < span class = "op" > > < / span > < span class = "kw" > for< / span > < span class = "ident" > RedisActor< / span > {
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< span class = "kw" > fn< / span > < span class = "ident" > handle< / span > (< span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "self" > self< / span > , < span class = "ident" > msg< / span > : < span class = "prelude-ty" > Result< / span > < span class = "op" > < < / span > < span class = "ident" > RespValue< / span > , < span class = "ident" > RespError< / span > < span class = "op" > > < / span > , < span class = "ident" > ctx< / span > : < span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "self" > Self< / span > < span class = "ident" > ::Context< / span > ) {
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< span class = "kw" > match< / span > < span class = "ident" > msg< / span > {
< span class = "prelude-val" > Err< / span > (< span class = "ident" > e< / span > ) < span class = "op" > =< / span > < span class = "op" > > < / span > {
< span class = "kw" > if< / span > < span class = "kw" > let< / span > < span class = "prelude-val" > Some< / span > (< span class = "ident" > tx< / span > ) < span class = "op" > =< / span > < span class = "self" > self< / span > .< span class = "ident" > queue< / span > .< span class = "ident" > pop_front< / span > () {
< span class = "kw" > let< / span > < span class = "kw" > _< / span > < span class = "op" > =< / span > < span class = "ident" > tx< / span > .< span class = "ident" > send< / span > (< span class = "prelude-val" > Err< / span > (< span class = "ident" > e< / span > .< span class = "ident" > into< / span > ()));
}
< span class = "ident" > ctx< / span > .< span class = "ident" > stop< / span > ();
}
< span class = "prelude-val" > Ok< / span > (< span class = "ident" > val< / span > ) < span class = "op" > =< / span > < span class = "op" > > < / span > {
< span class = "kw" > if< / span > < span class = "kw" > let< / span > < span class = "prelude-val" > Some< / span > (< span class = "ident" > tx< / span > ) < span class = "op" > =< / span > < span class = "self" > self< / span > .< span class = "ident" > queue< / span > .< span class = "ident" > pop_front< / span > () {
< span class = "kw" > let< / span > < span class = "kw" > _< / span > < span class = "op" > =< / span > < span class = "ident" > tx< / span > .< span class = "ident" > send< / span > (< span class = "prelude-val" > Ok< / span > (< span class = "ident" > val< / span > ));
}
}
}
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}
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}
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< span class = "kw" > impl< / span > < span class = "ident" > Handler< / span > < span class = "op" > < < / span > < span class = "ident" > Command< / span > < span class = "op" > > < / span > < span class = "kw" > for< / span > < span class = "ident" > RedisActor< / span > {
< span class = "kw" > type< / span > < span class = "prelude-ty" > Result< / span > < span class = "op" > =< / span > < span class = "ident" > ResponseFuture< / span > < span class = "op" > < < / span > < span class = "prelude-ty" > Result< / span > < span class = "op" > < < / span > < span class = "ident" > RespValue< / span > , < span class = "ident" > Error< / span > < span class = "op" > > < / span > < span class = "op" > > < / span > ;
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< span class = "kw" > fn< / span > < span class = "ident" > handle< / span > (< span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "self" > self< / span > , < span class = "ident" > msg< / span > : < span class = "ident" > Command< / span > , < span class = "kw" > _< / span > : < span class = "kw-2" > & < / span > < span class = "kw-2" > mut< / span > < span class = "self" > Self< / span > < span class = "ident" > ::Context< / span > ) < span class = "op" > -< / span > < span class = "op" > > < / span > < span class = "self" > Self< / span > < span class = "ident" > ::Result< / span > {
< span class = "kw" > let< / span > (< span class = "ident" > tx< / span > , < span class = "ident" > rx< / span > ) < span class = "op" > =< / span > < span class = "ident" > oneshot::channel< / span > ();
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< span class = "kw" > if< / span > < span class = "kw" > let< / span > < span class = "prelude-val" > Some< / span > (< span class = "kw-2" > ref< / span > < span class = "kw-2" > mut< / span > < span class = "ident" > cell< / span > ) < span class = "op" > =< / span > < span class = "self" > self< / span > .< span class = "ident" > cell< / span > {
< span class = "self" > self< / span > .< span class = "ident" > queue< / span > .< span class = "ident" > push_back< / span > (< span class = "ident" > tx< / span > );
< span class = "ident" > cell< / span > .< span class = "ident" > write< / span > (< span class = "ident" > msg< / span > .< span class = "number" > 0< / span > );
} < span class = "kw" > else< / span > {
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< span class = "kw" > let< / span > < span class = "kw" > _< / span > < span class = "op" > =< / span > < span class = "ident" > tx< / span > .< span class = "ident" > send< / span > (< span class = "prelude-val" > Err< / span > (< span class = "ident" > Error::NotConnected< / span > ));
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}
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< span class = "ident" > Box::pin< / span > (< span class = "kw" > async< / span > < span class = "kw" > move< / span > { < span class = "ident" > rx< / span > .< span class = "kw" > await< / span > .< span class = "ident" > map_err< / span > (< span class = "op" > |< / span > < span class = "kw" > _< / span > < span class = "op" > |< / span > < span class = "ident" > Error::Disconnected< / span > )< span class = "question-mark" > ?< / span > })
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}
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}
< / pre > < / div >
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< / section > < section id = "search" class = "content hidden" > < / section > < div id = "rustdoc-vars" data-root-path = "../../" data-current-crate = "actix_redis" data-search-index-js = "../../search-index.js" data-search-js = "../../search.js" > < / div >
< script src = "../../main.js" > < / script > < script src = "../../source-script.js" > < / script > < script src = "../../source-files.js" > < / script >
< / body > < / html >
