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Merge pull request #59 from spiral/feature/fsm
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| MIT License | ||
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| Copyright (c) 2020 Spiral Scout | ||
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| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
|
|
||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
|
|
||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,7 +1,7 @@ | ||
| test: | ||
| go test -v -race ./tests/backoff | ||
| go test -v -race ./tests/happy_scenarios | ||
| go test -v -race ./tests/interfaces | ||
| go test -v -race ./tests/issues | ||
| go test -v -race ./tests/stress | ||
| go test -v -race ./tests/disabled_vertices | ||
| go test -v -race -tags=debug ./tests/backoff | ||
| go test -v -race -tags=debug ./tests/happy_scenarios | ||
| go test -v -race -tags=debug ./tests/interfaces | ||
| go test -v -race -tags=debug ./tests/issues | ||
| go test -v -race -tags=debug ./tests/stress | ||
| go test -v -race -tags=debug ./tests/disabled_vertices |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| package endure | ||
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| import ( | ||
| "reflect" | ||
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| "github.com/cenkalti/backoff/v4" | ||
| "github.com/spiral/errors" | ||
| "go.uber.org/zap" | ||
| ) | ||
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| func (e *Endure) sendResultToUser(res *result) { | ||
| e.userResultsCh <- &Result{ | ||
| Error: res.err, | ||
| VertexID: res.vertexID, | ||
| } | ||
| } | ||
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| // traverseBackStop used to visit every Prev node and internalStop vertices | ||
| func (e *Endure) traverseBackStop(n *DllNode) { | ||
| const op = errors.Op("traverse_back_stop") | ||
| e.logger.Debug("stopping vertex in the first Serve call", zap.String("vertex id", n.Vertex.ID)) | ||
| nCopy := n | ||
| err := e.shutdown(nCopy, false) | ||
| if err != nil { | ||
| nCopy.Vertex.SetState(Error) | ||
| // ignore errors from internal_stop | ||
| e.logger.Error("failed to traverse vertex back", zap.String("vertex id", nCopy.Vertex.ID), zap.Error(errors.E(op, err))) | ||
| } | ||
| } | ||
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| func (e *Endure) retryHandler(res *result) { | ||
| const op = errors.Op("internal_retry_handler") | ||
| // get vertex from the graph | ||
| vertex := e.graph.GetVertex(res.vertexID) | ||
| if vertex == nil { | ||
| e.logger.Error("failed to get vertex from the graph, vertex is nil", zap.String("vertex id from the handleErrorCh channel", res.vertexID)) | ||
| e.userResultsCh <- &Result{ | ||
| Error: errors.E(op, errors.Traverse, errors.Str("failed to get vertex from the graph, vertex is nil")), | ||
| VertexID: res.vertexID, | ||
| } | ||
| return | ||
| } | ||
|
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| // stop without setting Stopped state to the Endure | ||
| n := e.runList.Head | ||
| err := e.shutdown(n, true) | ||
| if err != nil { | ||
| e.logger.Error("error happened during shutdown", zap.Error(err)) | ||
| } | ||
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| // reset vertex and dependencies to the initial state | ||
| // numOfDeps and visited/visiting | ||
| vertices := e.graph.Reset(vertex) | ||
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| // Topologically sort the graph | ||
| sorted, err := TopologicalSort(vertices) | ||
| if err != nil { | ||
| e.logger.Error("error sorting the graph", zap.Error(err)) | ||
| return | ||
| } | ||
| if sorted == nil { | ||
| e.logger.Error("sorted list should not be nil", zap.String("vertex id from the handleErrorCh channel", res.vertexID)) | ||
| e.userResultsCh <- &Result{ | ||
| Error: errors.E(op, errors.Traverse, errors.Str("failed to topologically sort the graph")), | ||
| VertexID: res.vertexID, | ||
| } | ||
| return | ||
| } | ||
|
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| // Init backoff | ||
| b := backoff.NewExponentialBackOff() | ||
| b.MaxElapsedTime = e.maxInterval | ||
| b.InitialInterval = e.initialInterval | ||
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| affectedRunList := NewDoublyLinkedList() | ||
| for i := 0; i <= len(sorted)-1; i++ { | ||
| affectedRunList.Push(sorted[i]) | ||
| } | ||
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| // call internal_init | ||
| headCopy := affectedRunList.Head | ||
| for headCopy != nil { | ||
| berr := backoff.Retry(e.backoffInit(headCopy.Vertex), b) | ||
| if berr != nil { | ||
| e.logger.Error("backoff failed", zap.String("vertex id", headCopy.Vertex.ID), zap.Error(berr)) | ||
| e.userResultsCh <- &Result{ | ||
| Error: errors.E(op, errors.FunctionCall, errors.Errorf("error during the Init function call")), | ||
| VertexID: headCopy.Vertex.ID, | ||
| } | ||
| return | ||
| } | ||
| headCopy = headCopy.Next | ||
| } | ||
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| // call serveInternal | ||
| headCopy = affectedRunList.Head | ||
| for headCopy != nil { | ||
| err := e.serveInternal(headCopy) | ||
| if err != nil { | ||
| e.userResultsCh <- &Result{ | ||
| Error: errors.E(op, errors.FunctionCall, errors.Errorf("error during the Serve function call")), | ||
| VertexID: headCopy.Vertex.ID, | ||
| } | ||
| e.logger.Error("fatal error during the serveInternal in the main thread", zap.String("vertex id", headCopy.Vertex.ID), zap.Error(err)) | ||
| return | ||
| } | ||
| headCopy = headCopy.Next | ||
| } | ||
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| e.sendResultToUser(res) | ||
| } | ||
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| func (e *Endure) backoffInit(v *Vertex) func() error { | ||
| return func() error { | ||
| const op = errors.Op("internal_backoff_init") | ||
| // we already checked the Interface satisfaction | ||
| // at this step absence of Init() is impossible | ||
| init, _ := reflect.TypeOf(v.Iface).MethodByName(InitMethodName) | ||
| v.SetState(Initializing) | ||
| err := e.callInitFn(init, v) | ||
| if err != nil { | ||
| v.SetState(Error) | ||
| e.logger.Error("error occurred during the call INIT function", zap.String("vertex id", v.ID), zap.Error(err)) | ||
| return errors.E(op, errors.FunctionCall, err) | ||
| } | ||
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| v.SetState(Initialized) | ||
| return nil | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package endure | ||
|
|
||
| /* | ||
| MIT License | ||
| Copyright (c) 2020 Spiral Scout | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. | ||
| */ |
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