memcached_return memcached_delete(memcached_st *ptr, char *key, size_t key_length,
time_t expiration)
{
- size_t send_length, sent_length;
- memcached_return rc;
+ return memcached_delete_by_key(ptr, key, key_length,
+ key, key_length, expiration);
+}
+
+memcached_return memcached_delete_by_key(memcached_st *ptr,
+ char *master_key, size_t master_key_length,
+ char *key, size_t key_length,
+ time_t expiration)
+{
+ char to_write;
+ size_t send_length;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
unsigned int server_key;
+ uint8_t replicas= 0;
+ memcached_return rc[MEMCACHED_MAX_REPLICAS];
- LIBMEMCACHED_MEMCACHED_DELETE_START();
+ if (key_length == 0)
+ return MEMCACHED_NO_KEY_PROVIDED;
- rc= memcached_connect(ptr);
+ if (ptr->hosts == NULL || ptr->number_of_hosts == 0)
+ return MEMCACHED_NO_SERVERS;
- if (rc != MEMCACHED_SUCCESS)
- return rc;
-
- server_key= memcached_generate_hash(key, key_length) % ptr->number_of_hosts;
+ server_key= memcached_generate_hash(ptr, master_key, master_key_length);
if (expiration)
send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
"delete %.*s\r\n", (int)key_length, key);
if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
- return MEMCACHED_WRITE_FAILURE;
+ {
+ rc[replicas]= MEMCACHED_WRITE_FAILURE;
+ goto error;
+ }
+
+ to_write= (ptr->flags & MEM_BUFFER_REQUESTS) ? 0 : 1;
- sent_length= send(ptr->hosts[server_key].fd, buffer, send_length, 0);
+ do
+ {
+ rc[replicas]= memcached_do(&ptr->hosts[server_key], buffer, send_length, to_write);
+ if (rc[replicas] != MEMCACHED_SUCCESS)
+ goto error;
- if (sent_length == -1 || sent_length != send_length)
- return MEMCACHED_WRITE_FAILURE;
+ if ((ptr->flags & MEM_BUFFER_REQUESTS))
+ {
+ rc[replicas]= MEMCACHED_BUFFERED;
+ }
+ else
+ {
+ rc[replicas]= memcached_response(&ptr->hosts[server_key], buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
+ if (rc[replicas] == MEMCACHED_DELETED)
+ rc[replicas]= MEMCACHED_SUCCESS;
+ }
- rc= memcached_response(ptr, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, server_key);
- LIBMEMCACHED_MEMCACHED_DELETE_END();
+ /* On error we just jump to the next potential server */
+error:
+ if (replicas > 1 && ptr->distribution == MEMCACHED_DISTRIBUTION_CONSISTENT)
+ {
+ if (server_key == (ptr->number_of_hosts - 1))
+ server_key= 0;
+ else
+ server_key++;
+ }
+ } while ((++replicas) < ptr->number_of_replicas);
- if (rc == MEMCACHED_DELETED)
- rc= MEMCACHED_SUCCESS;
+ /* As long as one object gets stored, we count this as a success */
+ while (replicas--)
+ {
+ if (rc[replicas] == MEMCACHED_DELETED)
+ return MEMCACHED_SUCCESS;
+ else if (rc[replicas] == MEMCACHED_DELETED)
+ rc[replicas]= MEMCACHED_BUFFERED;
+ }
- return rc;
+ return rc[0];
}