feat(go): migrated dynamic activities (#27)

Author: flippedcoder

go-sandbox/activities/dynamic/activity.go

@@ -0,0 +1,24 @@
+package dynamic
+
+import (
+	"context"
+	"fmt"
+
+	"go.temporal.io/sdk/activity"
+	"go.temporal.io/sdk/converter"
+)
+
+// @@@SNIPSTART go-dynamic-activity-definition
+func DynamicActivity(ctx context.Context, args converter.EncodedValues) (string, error) {
+	var arg1, arg2 string
+	err := args.Get(&arg1, &arg2)
+	if err != nil {
+		return "", fmt.Errorf("failed to decode arguments: %w", err)
+	}
+
+	info := activity.GetInfo(ctx)
+	result := fmt.Sprintf("%s - %s - %s", info.WorkflowType.Name, arg1, arg2)
+
+	return result, nil
+}
+// @@@SNIPEND

go-sandbox/activities/dynamic/dynamic_test.go

@@ -0,0 +1,34 @@
+package dynamic_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"go.temporal.io/sdk/activity"
+	"go.temporal.io/sdk/testsuite"
+
+	"my-org/quickstart/activities/dynamic"
+)
+
+type DynamicActivityTestSuite struct {
+	suite.Suite
+	testsuite.WorkflowTestSuite
+}
+
+func TestDynamicActivityTestSuite(t *testing.T) {
+	suite.Run(t, new(DynamicActivityTestSuite))
+}
+
+func (s *DynamicActivityTestSuite) Test_UnregisteredActivityRunsDynamicActivity() {
+	env := s.NewTestWorkflowEnvironment()
+	env.RegisterWorkflow(dynamic.CallUnregisteredActivityWorkflow)
+	env.RegisterDynamicActivity(dynamic.DynamicActivity, activity.DynamicRegisterOptions{})
+
+	env.ExecuteWorkflow(dynamic.CallUnregisteredActivityWorkflow, "first", "second")
+	s.True(env.IsWorkflowCompleted())
+	s.NoError(env.GetWorkflowError())
+
+	var result string
+	s.NoError(env.GetWorkflowResult(&result))
+	s.Equal("CallUnregisteredActivityWorkflow - first - second", result)
+}

go-sandbox/activities/dynamic/worker/main.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"log"
+
+	"go.temporal.io/sdk/activity"
+	"go.temporal.io/sdk/client"
+	"go.temporal.io/sdk/worker"
+
+	"my-org/quickstart/activities/dynamic"
+)
+
+func main() {
+	temporalClient, err := client.Dial(client.Options{})
+	if err != nil {
+		log.Fatalln("Unable to create client", err)
+	}
+	defer temporalClient.Close()
+
+	w := worker.New(temporalClient, dynamic.TaskQueue, worker.Options{})
+	w.RegisterWorkflow(dynamic.CallUnregisteredActivityWorkflow)
+	// @@@SNIPSTART go-dynamic-activity-register
+	w.RegisterDynamicActivity(dynamic.DynamicActivity, activity.DynamicRegisterOptions{})
+	// @@@SNIPEND
+
+	if err := w.Run(worker.InterruptCh()); err != nil {
+		log.Fatalln("Unable to start Worker", err)
+	}
+}

go-sandbox/activities/dynamic/workflow.go

@@ -0,0 +1,21 @@
+package dynamic
+
+import (
+	"time"
+
+	"go.temporal.io/sdk/workflow"
+)
+
+const TaskQueue = "dynamic-activity"
+
+// CallUnregisteredActivityWorkflow calls an Activity Type that no Activity is
+// registered under, so the Worker runs the Dynamic Activity instead.
+func CallUnregisteredActivityWorkflow(ctx workflow.Context, arg1, arg2 string) (string, error) {
+	ctx = workflow.WithActivityOptions(ctx, workflow.ActivityOptions{
+		StartToCloseTimeout: 10 * time.Second,
+	})
+
+	var result string
+	err := workflow.ExecuteActivity(ctx, "UnregisteredActivityType", arg1, arg2).Get(ctx, &result)
+	return result, err
+}