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engine: Adds shutdown method to exchange manager and unload all exchanges when engine is stopped (#1112)
* engine: shutdown and unload exchange when engine is stopped * linter: fixes * engine/exchMan: add nil check * engine/exchanges: add shutdown method to exchanges, rm len check lock not needed, expanded code coverage, address some nits * exchMan: report all failed shutdowns across exchanges, implement timer and monitoring routines. * exchMan: improve shutdown sequence and aloc. * further improvement * exchman: log from warn to error * websockconnection: Suppress error return when closure is caused by library * linter: fix * fix racies * add note on why not parallel tests * glorious: nits * spelling kween * thrasher: nits * engine: change print of setting using reflection, I keep forgetting to implement this so program around forgetfulness * engine/exchange_management: remove wait group and just rely on intermediary lock * glorious: nits * Update common/common.go Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io> * Update main.go Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io> --------- Co-authored-by: Ryan O'Hara-Reid <ryan.oharareid@thrasher.io> Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io>
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@@ -26,6 +26,8 @@ const (
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var (
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// ErrSubscriptionFailure defines an error when a subscription fails
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ErrSubscriptionFailure = errors.New("subscription failure")
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// ErrNotConnected defines an error when websocket is not connected
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ErrNotConnected = errors.New("websocket is not connected")
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errAlreadyRunning = errors.New("connection monitor is already running")
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errExchangeConfigIsNil = errors.New("exchange config is nil")
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@@ -423,10 +425,12 @@ func (w *Websocket) Shutdown() error {
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defer w.m.Unlock()
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if !w.IsConnected() {
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return fmt.Errorf("%v websocket: cannot shutdown a disconnected websocket",
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w.exchangeName)
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return fmt.Errorf("%v websocket: cannot shutdown %w",
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w.exchangeName,
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ErrNotConnected)
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}
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// TODO: Interrupt connection and or close connection when it is re-established.
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if w.IsConnecting() {
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return fmt.Errorf("%v websocket: cannot shutdown, in the process of reconnection",
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w.exchangeName)
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