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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
2.0 KiB
Go
60 lines
2.0 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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