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test_workflow.go
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test_workflow.go
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package saga
// This file is just a test workflow that is used in saga_test.go
// No tests are actually run in this file
import (
"context"
"sync"
"time"
"go.temporal.io/sdk/workflow"
)
type testResults struct {
// used for basic workflow
Count int
CompensationOrder []int
}
type testWorkflow struct {
Count int
CompensationOrder []int
mu sync.Mutex
}
type testSagaOptions struct {
ParallelCompensation bool
ContinueOnError bool
}
func (w *testWorkflow) basicSagaWorkflow(ctx workflow.Context, sagaOpts testSagaOptions) (testResults, error) {
// logger := temporallog.WorkflowLogger(ctx)
var emptyResults testResults
ao := workflow.ActivityOptions{
ScheduleToStartTimeout: time.Minute,
StartToCloseTimeout: time.Minute,
}
ctx = workflow.WithActivityOptions(ctx, ao)
var saga Saga
if sagaOpts.ParallelCompensation {
saga = NewParallelCompensator(ctx)
} else {
saga = NewSerialCompensator(ctx, sagaOpts.ContinueOnError)
}
err := workflow.SetQueryHandler(ctx, "count", func(input []byte) (int, error) {
return w.Count, nil
})
if err != nil {
return emptyResults, err
}
err = workflow.SetQueryHandler(ctx, "compensationOrder", func(input []byte) ([]int, error) {
return w.CompensationOrder, nil
})
if err != nil {
return emptyResults, err
}
err = workflow.ExecuteActivity(ctx, w.add, 10).Get(ctx, nil)
if err != nil {
// logger.Err(err).Error("activity failed")
handleSagaErr(ctx, saga.Compensate())
return emptyResults, err
}
saga.AddCompensation(w.minus, 5)
err = workflow.ExecuteActivity(ctx, w.add, 20).Get(ctx, nil)
if err != nil {
// logger.Err(err).Error("activity failed")
handleSagaErr(ctx, saga.Compensate())
return emptyResults, err
}
saga.AddCompensation(w.minus, 10)
err = workflow.ExecuteActivity(ctx, w.add, 30).Get(ctx, nil)
if err != nil {
// logger.Err(err).Error("activity failed")
handleSagaErr(ctx, saga.Compensate())
return emptyResults, err
}
return testResults{Count: w.Count, CompensationOrder: w.CompensationOrder}, nil
}
func (w *testWorkflow) add(ctx context.Context, n int) error {
w.Count += n
return nil
}
func (w *testWorkflow) minus(ctx context.Context, n int) error {
w.mu.Lock()
defer w.mu.Unlock()
w.Count -= n
w.CompensationOrder = append(w.CompensationOrder, n)
return nil
}
func handleSagaErr(ctx workflow.Context, err error) {
// logger := temporallog.WorkflowLogger(ctx)
// if err != nil {
// logger.Err(err).Warn("Error(s) in saga compensation")
// }
}