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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| // The MIT License | ||
| // | ||
| // Copyright (c) 2020 Temporal Technologies Inc. All rights reserved. | ||
| // | ||
| // Copyright (c) 2020 Uber Technologies, Inc. | ||
| // | ||
| // 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. | ||
|
|
||
| package queues | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
|
|
||
| "go.temporal.io/server/common/headers" | ||
| "go.temporal.io/server/common/persistence" | ||
| "go.temporal.io/server/service/history/tasks" | ||
| ) | ||
|
|
||
| type ( | ||
| // DLQWriter can be used to write tasks to the DLQ. | ||
| DLQWriter struct { | ||
| w QueueWriter | ||
| } | ||
| // QueueWriter is a subset of persistence.HistoryTaskQueueManager. | ||
| QueueWriter interface { | ||
| CreateQueue( | ||
| ctx context.Context, | ||
| request *persistence.CreateQueueRequest, | ||
| ) (*persistence.CreateQueueResponse, error) | ||
| EnqueueTask( | ||
| ctx context.Context, | ||
| request *persistence.EnqueueTaskRequest, | ||
| ) (*persistence.EnqueueTaskResponse, error) | ||
| } | ||
| EnqueueDLQTaskRequest struct { | ||
| SourceCluster string | ||
| TargetCluster string | ||
| Task tasks.Task | ||
| } | ||
| ) | ||
|
|
||
| func NewDLQWriter(w QueueWriter) *DLQWriter { | ||
| return &DLQWriter{ | ||
| w: w, | ||
| } | ||
| } | ||
|
|
||
| // EnqueueTask sends a task to the DLQ, creating the queue if it doesn't already exist. | ||
| func (q *DLQWriter) EnqueueTask(ctx context.Context, req *EnqueueDLQTaskRequest) error { | ||
| // This task experienced a terminal failure, so we should try to send it to the DLQ. | ||
| ctx = headers.SetCallerInfo(ctx, headers.SystemPreemptableCallerInfo) | ||
| // TODO: use clock.ContextWithTimeout here instead | ||
| ctx, cancel := context.WithTimeout(ctx, sendToDLQTimeout) | ||
| defer cancel() | ||
| queueKey := persistence.QueueKey{ | ||
| QueueType: persistence.QueueTypeHistoryDLQ, | ||
| Category: req.Task.GetCategory(), | ||
| SourceCluster: req.SourceCluster, | ||
| TargetCluster: req.TargetCluster, | ||
| } | ||
| _, err := q.w.CreateQueue(ctx, &persistence.CreateQueueRequest{ | ||
| QueueKey: queueKey, | ||
| }) | ||
| if err != nil { | ||
| if !errors.Is(err, persistence.ErrQueueAlreadyExists) { | ||
| return fmt.Errorf("%w: %v", ErrCreateDLQ, err) | ||
| } | ||
| } | ||
| _, err = q.w.EnqueueTask(ctx, &persistence.EnqueueTaskRequest{ | ||
| QueueType: queueKey.QueueType, | ||
| SourceCluster: queueKey.SourceCluster, | ||
| TargetCluster: queueKey.TargetCluster, | ||
| Task: req.Task, | ||
| }) | ||
| if err != nil { | ||
| return fmt.Errorf("%w: %v", ErrSendTaskToDLQ, err) | ||
| } | ||
| return nil | ||
| } |
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