Add attempt and firstAttemptTimestamp to context (#30)

Author: longquanzheng

integ/basic_workflow_state1.go

@@ -14,10 +14,22 @@ func (b basicWorkflowState1) GetStateId() string {
 }
 
 func (b basicWorkflowState1) Start(ctx iwf.WorkflowContext, input iwf.Object, persistence iwf.Persistence, communication iwf.Communication) (*iwf.CommandRequest, error) {
+	if ctx.GetAttempt() <= 0 {
+		panic("attempt should be greater than zero")
+	}
+	if ctx.GetFirstAttemptTimestampSeconds() <= 0 {
+		panic("GetFirstAttemptTimestampSeconds should be greater than zero")
+	}
 	return iwf.EmptyCommandRequest(), nil
 }
 
 func (b basicWorkflowState1) Decide(ctx iwf.WorkflowContext, input iwf.Object, commandResults iwf.CommandResults, persistence iwf.Persistence, communication iwf.Communication) (*iwf.StateDecision, error) {
+	if ctx.GetAttempt() <= 0 {
+		panic("attempt should be greater than zero")
+	}
+	if ctx.GetFirstAttemptTimestampSeconds() <= 0 {
+		panic("GetFirstAttemptTimestampSeconds should be greater than zero")
+	}
 	var i int
 	err := input.Get(&i)
 	if err != nil {

iwf/worker_service_impl.go

@@ -17,7 +17,9 @@ func (w *workerServiceImpl) HandleWorkflowStateStart(ctx context.Context, reques
 	stateDef := w.registry.getWorkflowStateDef(wfType, request.GetWorkflowStateId())
 	input := NewObject(request.StateInput, w.options.ObjectEncoder)
 	reqContext := request.GetContext()
-	wfCtx := newWorkflowContext(ctx, reqContext.GetWorkflowId(), reqContext.GetWorkflowRunId(), reqContext.GetStateExecutionId(), reqContext.GetWorkflowStartedTimestamp())
+	wfCtx := newWorkflowContext(
+		ctx, reqContext.GetWorkflowId(), reqContext.GetWorkflowRunId(), reqContext.GetStateExecutionId(), reqContext.GetWorkflowStartedTimestamp(),
+		int(reqContext.GetAttempt()), reqContext.GetFirstAttemptTimestamp())
 
 	pers, err := newPersistence(w.options.ObjectEncoder, w.registry.getWorkflowDataObjectKeyStore(wfType), w.registry.getSearchAttributeTypeStore(wfType), request.DataObjects, request.SearchAttributes, nil)
 	if err != nil {
@@ -96,7 +98,9 @@ func (w *workerServiceImpl) HandleWorkflowStateDecide(ctx context.Context, reque
 	stateDef := w.registry.getWorkflowStateDef(wfType, request.GetWorkflowStateId())
 	input := NewObject(request.StateInput, w.options.ObjectEncoder)
 	reqContext := request.GetContext()
-	wfCtx := newWorkflowContext(ctx, reqContext.GetWorkflowId(), reqContext.GetWorkflowRunId(), reqContext.GetStateExecutionId(), reqContext.GetWorkflowStartedTimestamp())
+	wfCtx := newWorkflowContext(
+		ctx, reqContext.GetWorkflowId(), reqContext.GetWorkflowRunId(), reqContext.GetStateExecutionId(), reqContext.GetWorkflowStartedTimestamp(),
+		int(reqContext.GetAttempt()), reqContext.GetFirstAttemptTimestamp())
 
 	commandResults, err := fromIdlCommandResults(request.CommandResults, w.options.ObjectEncoder)
 	if err != nil {

iwf/workflow_context.go

@@ -8,4 +8,10 @@ type WorkflowContext interface {
 	GetWorkflowStartTimestampSeconds() int64
 	GetStateExecutionId() string
 	GetWorkflowRunId() string
+	// GetFirstAttemptTimestampSeconds returns the start time of the first attempt of the API call. It's from ScheduledTimestamp of Cadence/Temporal activity.GetInfo
+	// require server version 1.2.2+, return 0 if server version is lower
+	GetFirstAttemptTimestampSeconds() int64
+	// GetAttempt returns an attempt number, which starts from 1, and increased by 1 for every retry if retry policy is specified. It's from Attempt of Cadence/Temporal activity.GetInfo
+	// require server version 1.2.2+, return 0 if server version is lower
+	GetAttempt() int
 }

iwf/workflow_context_impl.go

@@ -8,15 +8,22 @@ type workflowContextImpl struct {
 	workflowRunId                 string
 	stateExecutionId              string
 	workflowStartTimestampSeconds int64
+	attempt                       int
+	firstAttemptTimestampSeconds  int64
 }
 
-func newWorkflowContext(ctx context.Context, workflowId string, workflowRunId string, stateExecutionId string, workflowStartTimestampSeconds int64) WorkflowContext {
+func newWorkflowContext(
+	ctx context.Context, workflowId string, workflowRunId string, stateExecutionId string, workflowStartTimestampSeconds int64,
+	attempt int, firstAttemptTimestampSeconds int64,
+) WorkflowContext {
 	return &workflowContextImpl{
 		Context:                       ctx,
 		workflowId:                    workflowId,
 		workflowRunId:                 workflowRunId,
 		stateExecutionId:              stateExecutionId,
 		workflowStartTimestampSeconds: workflowStartTimestampSeconds,
+		attempt:                       attempt,
+		firstAttemptTimestampSeconds:  firstAttemptTimestampSeconds,
 	}
 }
 
@@ -35,3 +42,11 @@ func (w workflowContextImpl) GetStateExecutionId() string {
 func (w workflowContextImpl) GetWorkflowRunId() string {
 	return w.workflowRunId
 }
+
+func (w workflowContextImpl) GetFirstAttemptTimestampSeconds() int64 {
+	return w.firstAttemptTimestampSeconds
+}
+
+func (w workflowContextImpl) GetAttempt() int {
+	return w.attempt
+}