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41143b3b78
peers in order to avoid the same volume id being assigned twice 1. moving raft.Server to topology 2. adding max volume id command for raft
60 lines
2 KiB
Go
60 lines
2 KiB
Go
package weed_server
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import (
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"code.google.com/p/weed-fs/go/glog"
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"encoding/json"
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"github.com/goraft/raft"
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"io/ioutil"
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"net/http"
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"strings"
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)
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// Handles incoming RAFT joins.
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func (s *RaftServer) joinHandler(w http.ResponseWriter, req *http.Request) {
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glog.V(0).Infoln("Processing incoming join. Current Leader", s.raftServer.Leader(), "Self", s.raftServer.Name(), "Peers", s.raftServer.Peers())
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command := &raft.DefaultJoinCommand{}
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commandText, _ := ioutil.ReadAll(req.Body)
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glog.V(0).Info("Command:", string(commandText))
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if err := json.NewDecoder(strings.NewReader(string(commandText))).Decode(&command); err != nil {
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glog.V(0).Infoln("Error decoding json message:", err)
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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glog.V(0).Infoln("join command from Name", command.Name, "Connection", command.ConnectionString)
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if _, err := s.raftServer.Do(command); err != nil {
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switch err {
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case raft.NotLeaderError:
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s.redirectToLeader(w, req)
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default:
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glog.V(0).Infoln("Error processing join:", err)
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http.Error(w, err.Error(), http.StatusInternalServerError)
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}
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}
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}
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func (s *RaftServer) HandleFunc(pattern string, handler func(http.ResponseWriter, *http.Request)) {
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s.router.HandleFunc(pattern, handler)
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}
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func (s *RaftServer) redirectToLeader(w http.ResponseWriter, req *http.Request) {
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if s.topo.Leader() != "" {
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//http.StatusMovedPermanently does not cause http POST following redirection
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glog.V(0).Infoln("Redirecting to", http.StatusMovedPermanently, "http://"+s.topo.Leader()+req.URL.Path)
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http.Redirect(w, req, "http://"+s.topo.Leader()+req.URL.Path, http.StatusMovedPermanently)
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} else {
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glog.V(0).Infoln("Error: Leader Unknown")
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http.Error(w, "Leader unknown", http.StatusInternalServerError)
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}
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}
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func (s *RaftServer) statusHandler(w http.ResponseWriter, r *http.Request) {
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m := make(map[string]interface{})
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m["IsLeader"] = s.topo.IsLeader()
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m["Leader"] = s.topo.Leader()
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m["Peers"] = s.Peers()
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writeJsonQuiet(w, r, m)
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}
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