F #4809: API methods leader_only attribute. List, Info and Raft methods

are not leader only.

include/Request.h

@@ -177,6 +177,8 @@ protected:
 
     bool log_method_call; //Write method call and result to the log
 
+    bool leader_only; //Method can be only execute by leaders or solo servers
+
     /* ---------------------------------------------------------------------- */
     /* Class Constructors                                                     */
     /* ---------------------------------------------------------------------- */
@@ -189,6 +191,8 @@ protected:
         hidden_params.clear();
 
         log_method_call = true;
+
+        leader_only     = true;
     };
 
     virtual ~Request(){};

include/RequestManagerInfo.h

@@ -34,6 +34,8 @@ protected:
         :Request(method_name, "A:si", help)
     {
         auth_op = AuthRequest::USE;
+
+        leader_only = false;
     };
 
     ~RequestManagerInfo(){};

include/RequestManagerPoolInfoFilter.h

@@ -63,7 +63,9 @@ protected:
                                  const string& help,
                                  const string& signature)
         :Request(method_name,signature,help)
-    {};
+    {
+        leader_only = false;
+    };
 
     ~RequestManagerPoolInfoFilter(){};
 

include/RequestManagerZone.h

@@ -92,6 +92,7 @@ public:
                 "A:siiiiiiis")
     {
         log_method_call = false;
+        leader_only     = false;
     };
 
     ~ZoneReplicateLog(){};
@@ -106,9 +107,11 @@ public:
 class ZoneVoteRequest : public RequestManagerZone
 {
 public:
-    ZoneVoteRequest():
+    ZoneVoteRequest(): RequestManagerZone("one.zone.voterequest",
-        RequestManagerZone("one.zone.voterequest",
+        "Request vote from a candidate", "A:siiii")
-                "Request vote from a candidate", "A:siiii"){};
+    {
+        leader_only = false;
+    };
 
     ~ZoneVoteRequest(){};
 
@@ -122,9 +125,11 @@ public:
 class ZoneRaftStatus : public RequestManagerZone
 {
 public:
-    ZoneRaftStatus():
+    ZoneRaftStatus(): RequestManagerZone("one.zone.raftstatus",
-        RequestManagerZone("one.zone.raftstatus", "Returns Raft status",
+        "Returns Raft status", "A:s")
-                "A:s"){};
+    {
+        leader_only = false;
+    };
 
     ~ZoneRaftStatus(){};
 

src/rm/Request.cc

@@ -273,22 +273,31 @@ void Request::execute(
     att.req_id = (reinterpret_cast<uintptr_t>(this) * rand()) % 10000;
 
     Nebula& nd = Nebula::instance();
-    UserPool* upool = nd.get_upool();
 
-    bool authenticated = upool->authenticate(att.session,
+    UserPool* upool     = nd.get_upool();
-                                             att.password,
+    RaftManager * raftm = nd.get_raftm();
-                                             att.uid,
+
-                                             att.gid,
-                                             att.uname,
-                                             att.gname,
-                                             att.group_ids,
-                                             att.umask);
     if ( log_method_call )
     {
         log_method_invoked(att, _paramList, format_str, method_name,
                 hidden_params);
     }
 
+    if ( raftm->is_follower() && leader_only)
+    {
+        att.resp_msg = "Cannot process request, server is a follower";
+        failure_response(INTERNAL, att);
+    }
+    else if ( raftm->is_candidate() && leader_only)
+    {
+        att.resp_msg = "Cannot process request, oned cluster in election mode";
+        failure_response(INTERNAL, att);
+    }
+    else //leader or solo or !leader_only
+    {
+        bool authenticated = upool->authenticate(att.session, att.password,
+            att.uid, att.gid, att.uname, att.gname, att.group_ids, att.umask);
+
         if ( authenticated == false )
         {
             failure_response(AUTHENTICATION, att);
@@ -297,6 +306,7 @@ void Request::execute(
         {
             request_execute(_paramList, att);
         }
+    }
 
     if ( log_method_call )
     {