git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/memcached_behavior.c

   1 #include "common.h"
   2 #include <time.h>
   3 #include <sys/types.h>
   4 #include <sys/socket.h>
   5 #include <netinet/tcp.h>
   6
   7 /*
   8   This function is used to modify the behabior of running client.
   9
  10   We quit all connections so we can reset the sockets.
  11 */
  12
  13 static void set_behavior_flag(memcached_st *ptr, memcached_flags temp_flag, uint64_t data)
  14 {
  15   if (data)
  16     ptr->flags|= temp_flag;
  17   else
  18     ptr->flags&= ~temp_flag;
  19 }
  20
  21 memcached_return memcached_behavior_set(memcached_st *ptr,
  22                                         memcached_behavior flag,
  23                                         uint64_t data)
  24 {
  25   switch (flag)
  26   {
  27   case MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK:
  28     ptr->io_msg_watermark= (int32_t)data;
  29     break;
  30   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
  31     ptr->io_bytes_watermark= (int32_t)data;
  32     break;
  33   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
  34     ptr->snd_timeout= (int32_t)data;
  35     break;
  36   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
  37     ptr->rcv_timeout= (int32_t)data;
  38     break;
  39   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
  40     ptr->server_failure_limit= (uint32_t)data;
  41     break;
  42   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
  43     if (data)
  44         set_behavior_flag(ptr, MEM_VERIFY_KEY, 0);
  45     set_behavior_flag(ptr, MEM_BINARY_PROTOCOL, data);
  46     break;
  47   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
  48     set_behavior_flag(ptr, MEM_SUPPORT_CAS, data);
  49     break;
  50   case MEMCACHED_BEHAVIOR_NO_BLOCK:
  51     set_behavior_flag(ptr, MEM_NO_BLOCK, data);
  52     memcached_quit(ptr);
  53   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
  54     set_behavior_flag(ptr, MEM_BUFFER_REQUESTS, data);
  55     memcached_quit(ptr);
  56     break;
  57   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
  58     set_behavior_flag(ptr, MEM_TCP_NODELAY, data);
  59     memcached_quit(ptr);
  60     break;
  61   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
  62     {
  63       ptr->distribution= (memcached_server_distribution)(data);
  64       if (ptr->distribution == MEMCACHED_DISTRIBUTION_RANDOM)
  65       {
  66         srandom(time(NULL));
  67       }
  68       run_distribution(ptr);
  69       break;
  70     }
  71   case MEMCACHED_BEHAVIOR_KETAMA:
  72     {
  73       if (data)
  74       {
  75         ptr->hash= MEMCACHED_HASH_MD5;
  76         ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
  77       }
  78       else
  79       {
  80         ptr->hash= 0;
  81         ptr->distribution= 0;
  82       }
  83       run_distribution(ptr);
  84       break;
  85     }
  86   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
  87     {
  88       ptr->hash= MEMCACHED_HASH_MD5;
  89       ptr->distribution= MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA;
  90       set_behavior_flag(ptr, MEM_KETAMA_WEIGHTED, data);
  91       run_distribution(ptr);
  92       break;
  93     }
  94   case MEMCACHED_BEHAVIOR_HASH:
  95     ptr->hash= (memcached_hash)(data);
  96     break;
  97   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
  98     ptr->hash_continuum= (memcached_hash)(data);
  99     run_distribution(ptr);
 100     break;
 101   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 102     set_behavior_flag(ptr, MEM_USE_CACHE_LOOKUPS, data);
 103     memcached_quit(ptr);
 104     break;
 105   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 106     if (ptr->flags & MEM_BINARY_PROTOCOL)
 107         break;
 108     set_behavior_flag(ptr, MEM_VERIFY_KEY, data);
 109     break;
 110   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 111     {
 112       set_behavior_flag(ptr, MEM_USE_SORT_HOSTS, data);
 113       run_distribution(ptr);
 114
 115       break;
 116     }
 117   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 118     ptr->poll_timeout= (int32_t)data;
 119     break;
 120   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 121     ptr->connect_timeout= (int32_t)data;
 122     break;
 123   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 124     ptr->retry_timeout= (int32_t)data;
 125     break;
 126   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 127     ptr->send_size= (int32_t)data;
 128     memcached_quit(ptr);
 129     break;
 130   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 131     ptr->recv_size= (int32_t)data;
 132     memcached_quit(ptr);
 133     break;
 134   case MEMCACHED_BEHAVIOR_USER_DATA:
 135     return MEMCACHED_FAILURE;
 136   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 137     set_behavior_flag(ptr, MEM_HASH_WITH_PREFIX_KEY, data);
 138     break;
 139   }
 140
 141   return MEMCACHED_SUCCESS;
 142 }
 143
 144 uint64_t memcached_behavior_get(memcached_st *ptr,
 145                                 memcached_behavior flag)
 146 {
 147   memcached_flags temp_flag= 0;
 148
 149   switch (flag)
 150   {
 151   case MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK:
 152     temp_flag = ptr->io_msg_watermark;
 153     break;
 154   case MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK:
 155     temp_flag = ptr->io_bytes_watermark;
 156     break;
 157   case MEMCACHED_BEHAVIOR_BINARY_PROTOCOL:
 158     temp_flag= MEM_BINARY_PROTOCOL;
 159     break;
 160   case MEMCACHED_BEHAVIOR_SUPPORT_CAS:
 161     temp_flag= MEM_SUPPORT_CAS;
 162     break;
 163   case MEMCACHED_BEHAVIOR_CACHE_LOOKUPS:
 164     temp_flag= MEM_USE_CACHE_LOOKUPS;
 165     break;
 166   case MEMCACHED_BEHAVIOR_NO_BLOCK:
 167     temp_flag= MEM_NO_BLOCK;
 168     break;
 169   case MEMCACHED_BEHAVIOR_BUFFER_REQUESTS:
 170     temp_flag= MEM_BUFFER_REQUESTS;
 171     break;
 172   case MEMCACHED_BEHAVIOR_TCP_NODELAY:
 173     temp_flag= MEM_TCP_NODELAY;
 174     break;
 175   case MEMCACHED_BEHAVIOR_VERIFY_KEY:
 176     temp_flag= MEM_VERIFY_KEY;
 177     break;
 178   case MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED:
 179     temp_flag= MEM_KETAMA_WEIGHTED;
 180     break;
 181   case MEMCACHED_BEHAVIOR_DISTRIBUTION:
 182     return ptr->distribution;
 183   case MEMCACHED_BEHAVIOR_KETAMA:
 184     return (ptr->distribution == MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA) ? 1 : 0;
 185   case MEMCACHED_BEHAVIOR_HASH:
 186     return ptr->hash;
 187   case MEMCACHED_BEHAVIOR_KETAMA_HASH:
 188     return ptr->hash_continuum;
 189   case MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT:
 190     return ptr->server_failure_limit;
 191   case MEMCACHED_BEHAVIOR_SORT_HOSTS:
 192     temp_flag= MEM_USE_SORT_HOSTS;
 193     break;
 194   case MEMCACHED_BEHAVIOR_POLL_TIMEOUT:
 195     {
 196       return (uint64_t)ptr->poll_timeout;
 197     }
 198   case MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT:
 199     {
 200       return (uint64_t)ptr->connect_timeout;
 201     }
 202   case MEMCACHED_BEHAVIOR_RETRY_TIMEOUT:
 203     {
 204       return (uint64_t)ptr->retry_timeout;
 205     }
 206   case MEMCACHED_BEHAVIOR_SND_TIMEOUT:
 207     return (uint64_t)ptr->snd_timeout;
 208   case MEMCACHED_BEHAVIOR_RCV_TIMEOUT:
 209     return (uint64_t)ptr->rcv_timeout;
 210   case MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE:
 211     {
 212       int sock_size;
 213       socklen_t sock_length= sizeof(int);
 214
 215       /* REFACTOR */
 216       /* We just try the first host, and if it is down we return zero */
 217       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 218         return 0;
 219
 220       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 221                      SO_SNDBUF, &sock_size, &sock_length))
 222         return 0; /* Zero means error */
 223
 224       return sock_size;
 225     }
 226   case MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE:
 227     {
 228       int sock_size;
 229       socklen_t sock_length= sizeof(int);
 230
 231       /* REFACTOR */
 232       /* We just try the first host, and if it is down we return zero */
 233       if ((memcached_connect(&ptr->hosts[0])) != MEMCACHED_SUCCESS)
 234         return 0;
 235
 236       if (getsockopt(ptr->hosts[0].fd, SOL_SOCKET,
 237                      SO_RCVBUF, &sock_size, &sock_length))
 238         return 0; /* Zero means error */
 239
 240       return sock_size;
 241     }
 242   case MEMCACHED_BEHAVIOR_USER_DATA:
 243     return MEMCACHED_FAILURE;
 244   case MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY:
 245     temp_flag= MEM_HASH_WITH_PREFIX_KEY;
 246     break;
 247   }
 248
 249   WATCHPOINT_ASSERT(temp_flag); /* Programming mistake if it gets this far */
 250   if (ptr->flags & temp_flag)
 251     return 1;
 252   else
 253     return 0;
 254
 255   return MEMCACHED_SUCCESS;
 256 }