/
random_dog_workflow.go
141 lines (123 loc) · 4.25 KB
/
random_dog_workflow.go
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package workflows
import (
"context"
"encoding/json"
"errors"
"fmt"
"github.com/jtorvald/temporal-dispatch-poc/schema"
"go.temporal.io/sdk/activity"
"go.temporal.io/sdk/workflow"
"net/http"
"path"
"time"
)
func init(){
if availableWorkflows == nil {
availableWorkflows = make(map[string]interface{})
}
availableWorkflows["random_dog"] = RandomDogWorkflow
}
// RandomDogWorkflow is a Hello World workflow definition.
func RandomDogWorkflow(ctx workflow.Context, params map[string]interface{}) (*schema.WorkflowInstanceUpdate, error) {
/*
params:
{
"key": "value",
"incident_id": 32,
"incident_name": "dispatch-singlesproject-default-32",
"instance_id": 25
}
*/
result := &schema.WorkflowInstanceUpdate{
CreatedAt: workflow.Now(ctx).UTC().Format(format),
Artifacts: []*schema.DocumentCreate{},
Parameters: nil,
ResourceId: "",
ResourceType: "",
RunReason: "",
Status: "Failed",
UpdatedAt: workflow.Now(ctx).UTC().Format(format),
Weblink: "https://dog.ceo/",
}
ao := workflow.ActivityOptions{
StartToCloseTimeout: 10 * time.Second,
}
ctx = workflow.WithActivityOptions(ctx, ao)
logger := workflow.GetLogger(ctx)
logger.Info("workflow started", "name", params["workflow_instance_id"])
// setup query handler for query type "state"
err := workflow.SetQueryHandler(ctx, "state", func() (*schema.WorkflowInstanceUpdate, error) {
return result, nil
})
if err != nil {
logger.Info("SetQueryHandler failed: " + err.Error())
return nil, err
}
// we have setup everything, now we go into a running state
result.Status = "Running"
result.UpdatedAt = workflow.Now(ctx).UTC().Format(format)
// to simulate workflow been blocked on something, in reality, workflow could wait on anything like activity, signal or timer
_ = workflow.NewTimer(ctx, time.Second*15).Get(ctx, nil)
logger.Info("Timer fired")
var artifact1 *schema.DocumentCreate
err = workflow.ExecuteActivity(ctx, FetchRandomDogActivity, params).Get(ctx, &artifact1)
if err != nil {
result.Status = "Failed"
logger.Error("FetchRandomDogActivity failed.", "Error", err)
return nil, err
}
artifact1.Description = "Dog 1"
result.Artifacts = append(result.Artifacts, artifact1)
result.UpdatedAt = workflow.Now(ctx).UTC().Format(format)
// to simulate workflow been blocked on something, in reality, workflow could wait on anything like activity, signal or timer
_ = workflow.NewTimer(ctx, time.Second*15).Get(ctx, nil)
var artifact2 *schema.DocumentCreate
err = workflow.ExecuteActivity(ctx, FetchRandomDogActivity, params).Get(ctx, &artifact2)
if err != nil {
result.Status = "Failed"
logger.Error("FetchRandomDogActivity failed.", "Error", err)
return nil, err
}
artifact2.Description = "Dog 2"
result.Artifacts = append(result.Artifacts, artifact2)
result.UpdatedAt = workflow.Now(ctx).UTC().Format(format)
result.Status = "Completed"
logger.Info("Random Dog workflow completed.", "result", result)
return result, nil
}
//FetchRandomDogActivity calls the dog.ceo api for a random dog picture
func FetchRandomDogActivity(ctx context.Context, params map[string]interface{}) (*schema.DocumentCreate, error) {
logger := activity.GetLogger(ctx)
logger.Info("FetchRandomDogActivity", "name", params["workflow_instance_id"])
c := http.Client{Timeout: time.Duration(1) * time.Second}
resp, err := c.Get("https://dog.ceo/api/breeds/image/random")
if err != nil {
fmt.Printf("Error %s", err)
return nil, err
}
defer resp.Body.Close()
randomDog := &dogResponse{}
err = json.NewDecoder(resp.Body).Decode(randomDog)
if err != nil {
return nil, err
}
if randomDog.Status != "success" {
return nil, errors.New(randomDog.Message)
}
artifact := &schema.DocumentCreate{
CreatedAt: time.Now().UTC().Format(format),
Description: "Random dog",
Evergreen: false,
Name: path.Base(randomDog.Message),
ResourceId: path.Base(randomDog.Message),
ResourceType: "",
Filters: []*schema.SearchFilterRead{},
UpdatedAt: time.Now().UTC().Format(format),
Weblink: randomDog.Message,
}
return artifact, nil
}
type dogResponse struct {
Message string `json:"message"`
Status string `json:"status"`
}