// Copyright 2013 Prometheus Team // 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 web import ( "github.com/prometheus/prometheus/storage/raw/leveldb" "net/http" "sync" ) type DatabasesHandler struct { States []leveldb.DatabaseState Incoming chan []leveldb.DatabaseState mutex sync.RWMutex } func (h *DatabasesHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { select { case states := <-h.Incoming: h.mutex.Lock() defer h.mutex.Unlock() h.States = states default: h.mutex.RLock() defer h.mutex.RUnlock() } executeTemplate(w, "databases", h) }