feat: support NewJobWithNonAnonymousFunc

job.go

@@ -1,6 +1,12 @@
 package dcron
 
-import "context"
+import (
+	"context"
+	"reflect"
+	"regexp"
+	"runtime"
+	"strings"
+)
 
 type JobMeta interface {
 	Key() string
@@ -29,6 +35,18 @@ func NewJob(key, spec string, run RunFunc, options ...JobOption) Job {
 	}
 }
 
+// NewJobWithNonAnonymousFunc return a new Job with the 'run' function's name as key.
+// Be careful, the 'run' should be a non-anonymous function,
+// or returned Job will has a emtpy key, and can not be added to a Cron.
+func NewJobWithNonAnonymousFunc(spec string, run RunFunc, options ...JobOption) Job {
+	return &wrappedJob{
+		key:     funcName(run),
+		spec:    spec,
+		run:     run,
+		options: options,
+	}
+}
+
 func (j *wrappedJob) Key() string {
 	return j.key
 }
@@ -47,3 +65,16 @@ func (j *wrappedJob) Run(ctx context.Context) error {
 func (j *wrappedJob) Options() []JobOption {
 	return j.options
 }
+
+func funcName(run RunFunc) string {
+	if run != nil {
+		name := runtime.FuncForPC(reflect.ValueOf(run).Pointer()).Name()
+		splits := strings.Split(name, ".")
+		name = strings.TrimSuffix(splits[len(splits)-1], "-fm") // method closures have a "-fm" suffix
+		if regexp.MustCompile("^func[0-9]+$").MatchString(name) {
+			return ""
+		}
+		return name
+	}
+	return ""
+}

job_test.go

@@ -203,3 +203,80 @@ func Test_wrappedJob_Spec(t *testing.T) {
 		})
 	}
 }
+
+func TestNewJobWithNonAnonymousFunc(t *testing.T) {
+	type args struct {
+		spec    string
+		run     RunFunc
+		options []JobOption
+	}
+	tests := []struct {
+		name  string
+		args  args
+		check func(t *testing.T, job Job)
+	}{
+		{
+			name: "regular",
+			args: args{
+				run: Func,
+			},
+			check: func(t *testing.T, job Job) {
+				if job.Key() != "Func" {
+					t.Fatal(job.Key())
+				}
+			},
+		},
+		{
+			name: "method",
+			args: args{
+				run: Foo{}.Method,
+			},
+			check: func(t *testing.T, job Job) {
+				if job.Key() != "Method" {
+					t.Fatal(job.Key())
+				}
+			},
+		},
+		{
+			name: "nil",
+			args: args{
+				run: nil,
+			},
+			check: func(t *testing.T, job Job) {
+				if job.Key() != "" {
+					t.Fatal(job.Key())
+				}
+			},
+		},
+		{
+			name: "anonymous func",
+			args: args{
+				run: func(ctx context.Context) error {
+					return nil
+				},
+			},
+			check: func(t *testing.T, job Job) {
+				if job.Key() != "" {
+					t.Fatal(job.Key())
+				}
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := NewJobWithNonAnonymousFunc(tt.args.spec, tt.args.run, tt.args.options...)
+			tt.check(t, got)
+		})
+	}
+}
+
+func Func(ctx context.Context) error {
+	return nil
+}
+
+type Foo struct {
+}
+
+func (Foo) Method(ctx context.Context) error {
+	return nil
+}