Feat: provide stage field for TraitDefinition (#4570)

* Feat: provide stage field for TraitDefinition

Signed-off-by: ZhongsJie <zhongsjie@gmail.com>

* Feat: Refactor the collect health status fn

Signed-off-by: ZhongsJie <zhongsjie@gmail.com>

Signed-off-by: ZhongsJie <zhongsjie@gmail.com>

apis/core.oam.dev/common/types.go

@@ -249,6 +249,12 @@ type ApplicationComponentStatus struct {
 	Scopes             []corev1.ObjectReference `json:"scopes,omitempty"`
 }
 
+// Equal check if two ApplicationComponentStatus are equal
+func (in ApplicationComponentStatus) Equal(r ApplicationComponentStatus) bool {
+	return in.Name == r.Name && in.Namespace == r.Namespace &&
+		in.Cluster == r.Cluster && in.Env == r.Env
+}
+
 // ApplicationTraitStatus records the trait health status
 type ApplicationTraitStatus struct {
 	Type    string `json:"type"`

apis/core.oam.dev/v1beta1/core_types.go

@@ -158,8 +158,29 @@ type TraitDefinitionSpec struct {
 	// ControlPlaneOnly defines which cluster is dispatched to
 	// +optional
 	ControlPlaneOnly bool `json:"controlPlaneOnly,omitempty"`
+
+	// Stage defines the stage information to which this trait resource processing belongs.
+	// Currently, PreDispatch and PostDispatch are provided, which are used to control resource
+	// pre-process and post-process respectively.
+	// +optional
+	Stage StageType `json:"stage,omitempty"`
 }
 
+// StageType describes how the manifests should be dispatched.
+// Only one of the following stage types may be specified.
+// If none of the following types is specified, the default one
+// is DefaultDispatch.
+type StageType string
+
+const (
+	// PreDispatch means that pre dispatch for manifests
+	PreDispatch StageType = "PreDispatch"
+	// DefaultDispatch means that default dispatch for manifests
+	DefaultDispatch StageType = "DefaultDispatch"
+	// PostDispatch means that post dispatch for manifests
+	PostDispatch StageType = "PostDispatch"
+)
+
 // TraitDefinitionStatus is the status of TraitDefinition
 type TraitDefinitionStatus struct {
 	// ConditionedStatus reflects the observed status of a resource