Implement the server failure rehash mechanism

[awesomized/libmemcached] / libmemcached / memcached_connect.c

diff --git a/libmemcached/memcached_connect.c b/libmemcached/memcached_connect.c
index 74469870e1ad94d22d40791737a755f1989b4b64..f2549dc75157877fb23a8e79244a7e2b465298e4 100644 (file)
--- a/libmemcached/memcached_connect.c
+++ b/libmemcached/memcached_connect.c
@@ -45,30 +45,43 @@ static memcached_return set_socket_options(memcached_server_st *ptr)
   if (ptr->type == MEMCACHED_CONNECTION_UDP)
     return MEMCACHED_SUCCESS;
 
-  if (ptr->root->flags & MEM_NO_BLOCK)
+  if (ptr->root->snd_timeout)
   {
     int error;
-    struct linger linger;
     struct timeval waittime;
 
-    waittime.tv_sec= 10;
-    waittime.tv_usec= 0;
-
-    linger.l_onoff= 1; 
-    linger.l_linger= MEMCACHED_DEFAULT_TIMEOUT; 
-    error= setsockopt(ptr->fd, SOL_SOCKET, SO_LINGER, 
-                      &linger, (socklen_t)sizeof(struct linger));
-    WATCHPOINT_ASSERT(error == 0);
+    waittime.tv_sec= 0;
+    waittime.tv_usec= ptr->root->snd_timeout;
 
     error= setsockopt(ptr->fd, SOL_SOCKET, SO_SNDTIMEO, 
                       &waittime, (socklen_t)sizeof(struct timeval));
     WATCHPOINT_ASSERT(error == 0);
+  }
+
+  if (ptr->root->rcv_timeout)
+  {
+    int error;
+    struct timeval waittime;
+
+    waittime.tv_sec= 0;
+    waittime.tv_usec= ptr->root->rcv_timeout;
 
     error= setsockopt(ptr->fd, SOL_SOCKET, SO_RCVTIMEO, 
                       &waittime, (socklen_t)sizeof(struct timeval));
     WATCHPOINT_ASSERT(error == 0);
   }
 
+  {
+    int error;
+    struct linger linger;
+
+    linger.l_onoff= 1; 
+    linger.l_linger= MEMCACHED_DEFAULT_TIMEOUT; 
+    error= setsockopt(ptr->fd, SOL_SOCKET, SO_LINGER, 
+                      &linger, (socklen_t)sizeof(struct linger));
+    WATCHPOINT_ASSERT(error == 0);
+  }
+
   if (ptr->root->flags & MEM_TCP_NODELAY)
   {
     int flag= 1;
@@ -159,6 +172,11 @@ static memcached_return network_connect(memcached_server_st *ptr)
   {
     struct addrinfo *use;
 
+    if(ptr->root->server_failure_limit != 0) {
+      if(ptr->server_failure_counter >= ptr->root->server_failure_limit) {
+          server_remove(ptr);
+      }
+    }
     /* Old connection junk still is in the structure */
     WATCHPOINT_ASSERT(ptr->cursor_active == 0);
 
@@ -211,13 +229,27 @@ test_connect:
             {
               goto handle_retry;
             }
-            else if (error != 1)
+            else if (error != 1 || fds[0].revents & POLLERR)
             {
               ptr->cached_errno= errno;
               WATCHPOINT_ERRNO(ptr->cached_errno);
               WATCHPOINT_NUMBER(ptr->root->connect_timeout);
               close(ptr->fd);
               ptr->fd= -1;
+              if (ptr->address_info)
+              {
+                freeaddrinfo(ptr->address_info);
+                ptr->address_info= NULL;
+              }
+
+          if (ptr->root->retry_timeout)
+          {
+            struct timeval next_time;
+
+            gettimeofday(&next_time, NULL);
+            ptr->next_retry= next_time.tv_sec + ptr->root->retry_timeout;
+          }
+              ptr->server_failure_counter+= 1;
               return MEMCACHED_ERRNO;
             }
 
@@ -231,7 +263,6 @@ test_connect:
         default:
 handle_retry:
           ptr->cached_errno= errno;
-          WATCHPOINT_ERRNO(ptr->cached_errno);
           close(ptr->fd);
           ptr->fd= -1;
           if (ptr->root->retry_timeout)
@@ -246,15 +277,19 @@ handle_retry:
       else
       {
         WATCHPOINT_ASSERT(ptr->cursor_active == 0);
+        ptr->server_failure_counter= 0;
         return MEMCACHED_SUCCESS;
       }
       use = use->ai_next;
     }
   }
 
-  if (ptr->fd == -1)
+  if (ptr->fd == -1) {
+    ptr->server_failure_counter+= 1;
     return MEMCACHED_ERRNO; /* The last error should be from connect() */
+  }
 
+  ptr->server_failure_counter= 0;
   return MEMCACHED_SUCCESS; /* The last error should be from connect() */
 }
 
@@ -290,9 +325,6 @@ memcached_return memcached_connect(memcached_server_st *ptr)
     WATCHPOINT_ASSERT(0);
   }
 
-  if (rc != MEMCACHED_SUCCESS)
-    WATCHPOINT_ERROR(rc);
-
   LIBMEMCACHED_MEMCACHED_CONNECT_END();
 
   return rc;