github.com/cloud-foundations/dominator@v0.0.0-20221004181915-6e4fee580046/fleetmanager/httpd/api.go (about)

     1  package httpd
     2  
     3  import (
     4  	"fmt"
     5  	"io"
     6  	"net"
     7  	"net/http"
     8  	"sync"
     9  
    10  	"github.com/Cloud-Foundations/Dominator/fleetmanager/topology"
    11  	"github.com/Cloud-Foundations/Dominator/lib/html"
    12  	"github.com/Cloud-Foundations/Dominator/lib/log"
    13  )
    14  
    15  type HtmlWriter interface {
    16  	WriteHtml(writer io.Writer)
    17  }
    18  
    19  type Server struct {
    20  	htmlWriters []HtmlWriter
    21  	logger      log.DebugLogger
    22  	mutex       sync.RWMutex
    23  	_topology   *topology.Topology
    24  }
    25  
    26  func StartServer(portNum uint, logger log.DebugLogger) (*Server, error) {
    27  	listener, err := net.Listen("tcp", fmt.Sprintf(":%d", portNum))
    28  	if err != nil {
    29  		return nil, err
    30  	}
    31  	server := &Server{logger: logger}
    32  	html.HandleFunc("/", server.statusHandler)
    33  	go http.Serve(listener, nil)
    34  	return server, nil
    35  }
    36  
    37  func (s *Server) AddHtmlWriter(htmlWriter HtmlWriter) {
    38  	s.htmlWriters = append(s.htmlWriters, htmlWriter)
    39  }
    40  
    41  func (s *Server) UpdateTopology(t *topology.Topology) {
    42  	s.mutex.Lock()
    43  	defer s.mutex.Unlock()
    44  	s._topology = t
    45  }