/
mem.go
61 lines (50 loc) · 1.8 KB
/
mem.go
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// Copyright 2018 Istio 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 topics defines several canonical ControlZ topics.
package topics
import (
"html/template"
"net/http"
"runtime"
"istio.io/istio/pkg/ctrlz/fw"
)
type memTopic struct {
}
// MemTopic returns a ControlZ topic that allows visualization of process memory usage.
func MemTopic() fw.Topic {
return memTopic{}
}
func (memTopic) Title() string {
return "Memory Usage"
}
func (memTopic) Prefix() string {
return "mem"
}
func (memTopic) Activate(context fw.TopicContext) {
tmpl := template.Must(context.Layout().Parse(string(MustAsset("assets/templates/mem.html"))))
_ = context.HTMLRouter().StrictSlash(true).NewRoute().Path("/").HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
ms := &runtime.MemStats{}
runtime.ReadMemStats(ms)
fw.RenderHTML(w, tmpl, ms)
})
_ = context.JSONRouter().StrictSlash(true).NewRoute().Methods("GET").Path("/").HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
ms := &runtime.MemStats{}
runtime.ReadMemStats(ms)
fw.RenderJSON(w, http.StatusOK, ms)
})
_ = context.JSONRouter().StrictSlash(true).NewRoute().Methods("PUT").Path("/forcecollection").HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
runtime.GC()
w.WriteHeader(http.StatusAccepted)
})
}