refactor monitoring (#1751)

Signed-off-by: huanggze <loganhuang@yunify.com>

pkg/kapis/monitoring/v1alpha2/handler.go

@@ -0,0 +1,145 @@
+/*
+
+ Copyright 2019 The KubeSphere Authors.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+*/
+
+package v1alpha2
+
+import (
+	"github.com/emicklei/go-restful"
+	"kubesphere.io/kubesphere/pkg/api"
+	"kubesphere.io/kubesphere/pkg/api/monitoring/v1alpha2"
+	model "kubesphere.io/kubesphere/pkg/models/monitoring"
+	"kubesphere.io/kubesphere/pkg/simple/client/k8s"
+	"kubesphere.io/kubesphere/pkg/simple/client/monitoring"
+)
+
+type handler struct {
+	k  k8s.Client
+	mo model.MonitoringOperator
+}
+
+func newHandler(k k8s.Client, m monitoring.Interface) *handler {
+	return &handler{k, model.NewMonitoringOperator(m)}
+}
+
+func (h handler) handleClusterMetricsQuery(req *restful.Request, resp *restful.Response) {
+	p, err := h.parseRequestParams(req, monitoring.LevelCluster)
+	if err != nil {
+		api.HandleBadRequest(resp, err)
+		return
+	}
+	h.handleNamedMetricsQuery(resp, p)
+}
+
+func (h handler) handleNodeMetricsQuery(req *restful.Request, resp *restful.Response) {
+	p, err := h.parseRequestParams(req, monitoring.LevelNode)
+	if err != nil {
+		api.HandleBadRequest(resp, err)
+		return
+	}
+	h.handleNamedMetricsQuery(resp, p)
+}
+
+func (h handler) handleWorkspaceMetricsQuery(req *restful.Request, resp *restful.Response) {
+	p, err := h.parseRequestParams(req, monitoring.LevelWorkspace)
+	if err != nil {
+		api.HandleBadRequest(resp, err)
+		return
+	}
+	h.handleNamedMetricsQuery(resp, p)
+}
+
+func (h handler) handleNamespaceMetricsQuery(req *restful.Request, resp *restful.Response) {
+	p, err := h.parseRequestParams(req, monitoring.LevelNamespace)
+	if err != nil {
+		api.HandleBadRequest(resp, err)
+		return
+	}
+	h.handleNamedMetricsQuery(resp, p)
+}
+
+func (h handler) handleWorkloadMetricsQuery(req *restful.Request, resp *restful.Response) {
+	p, err := h.parseRequestParams(req, monitoring.LevelWorkload)
+	if err != nil {
+		api.HandleBadRequest(resp, err)
+		return
+	}
+	h.handleNamedMetricsQuery(resp, p)
+}
+
+func (h handler) handlePodMetricsQuery(req *restful.Request, resp *restful.Response) {
+	p, err := h.parseRequestParams(req, monitoring.LevelPod)
+	if err != nil {
+		api.HandleBadRequest(resp, err)
+		return
+	}
+	h.handleNamedMetricsQuery(resp, p)
+}
+
+func (h handler) handleContainerMetricsQuery(req *restful.Request, resp *restful.Response) {
+	p, err := h.parseRequestParams(req, monitoring.LevelContainer)
+	if err != nil {
+		api.HandleBadRequest(resp, err)
+		return
+	}
+	h.handleNamedMetricsQuery(resp, p)
+}
+
+func (h handler) handlePVCMetricsQuery(req *restful.Request, resp *restful.Response) {
+	p, err := h.parseRequestParams(req, monitoring.LevelPVC)
+	if err != nil {
+		api.HandleBadRequest(resp, err)
+		return
+	}
+	h.handleNamedMetricsQuery(resp, p)
+}
+
+func (h handler) handleComponentMetricsQuery(req *restful.Request, resp *restful.Response) {
+	p, err := h.parseRequestParams(req, monitoring.LevelComponent)
+	if err != nil {
+		api.HandleBadRequest(resp, err)
+		return
+	}
+	h.handleNamedMetricsQuery(resp, p)
+}
+
+func (h handler) handleNamedMetricsQuery(resp *restful.Response, p params) {
+	var res v1alpha2.APIResponse
+	var err error
+
+	if p.isRangeQuery() {
+		res, err = h.mo.GetNamedMetricsOverTime(p.start, p.end, p.step, p.option)
+		if err != nil {
+			api.HandleInternalError(resp, err)
+			return
+		}
+	} else {
+		res, err = h.mo.GetNamedMetrics(p.time, p.option)
+		if err != nil {
+			api.HandleInternalError(resp, err)
+			return
+		}
+
+		if p.shouldSort() {
+			var rows int
+			res, rows = h.mo.SortMetrics(res, p.target, p.order, p.identifier)
+			res = h.mo.PageMetrics(res, p.page, p.limit, rows)
+		}
+	}
+
+	resp.WriteAsJson(res)
+}