git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/flush.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached library
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *
   7  *  Redistribution and use in source and binary forms, with or without
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   9  *  met:
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  11  *      * Redistributions of source code must retain the above copyright
  12  *  notice, this list of conditions and the following disclaimer.
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  14  *      * Redistributions in binary form must reproduce the above
  15  *  copyright notice, this list of conditions and the following disclaimer
  16  *  in the documentation and/or other materials provided with the
  17  *  distribution.
  18  *
  19  *      * The names of its contributors may not be used to endorse or
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  21  *  written permission.
  22  *
  23  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  33  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  35  */
  36
  37 #include <libmemcached/common.h>
  38
  39 static memcached_return_t memcached_flush_binary(Memcached *ptr,
  40                                                  time_t expiration,
  41                                                  const bool reply)
  42 {
  43   protocol_binary_request_flush request= {};
  44
  45   request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
  46   request.message.header.request.extlen= 4;
  47   request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
  48   request.message.header.request.bodylen= htonl(request.message.header.request.extlen);
  49   request.message.body.expiration= htonl((uint32_t) expiration);
  50
  51   memcached_return_t rc= MEMCACHED_SUCCESS;
  52
  53   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
  54   {
  55     memcached_instance_st* instance= memcached_instance_fetch(ptr, x);
  56     initialize_binary_request(instance, request.message.header);
  57
  58     if (reply)
  59     {
  60       request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSH;
  61     }
  62     else
  63     {
  64       request.message.header.request.opcode= PROTOCOL_BINARY_CMD_FLUSHQ;
  65     }
  66
  67     libmemcached_io_vector_st vector[]=
  68     {
  69       { NULL, 0 },
  70       { request.bytes, sizeof(request.bytes) }
  71     };
  72
  73     memcached_return_t rrc;
  74     if (memcached_failed(rrc= memcached_vdo(instance, vector, 2, true)))
  75     {
  76       if (instance->error_messages == NULL or instance->root->error_messages == NULL)
  77       {
  78         memcached_set_error(*instance, rrc, MEMCACHED_AT);
  79       }
  80       memcached_io_reset(instance);
  81       rc= MEMCACHED_SOME_ERRORS;
  82     }
  83   }
  84
  85   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
  86   {
  87     memcached_instance_st* instance= memcached_instance_fetch(ptr, x);
  88
  89     if (instance->response_count() > 0)
  90     {
  91       (void)memcached_response(instance, NULL, 0, NULL);
  92     }
  93   }
  94
  95   return rc;
  96 }
  97
  98 static memcached_return_t memcached_flush_textual(Memcached *ptr,
  99                                                   time_t expiration,
 100                                                   const bool reply)
 101 {
 102   char buffer[MEMCACHED_MAXIMUM_INTEGER_DISPLAY_LENGTH +1];
 103   int send_length= 0;
 104   if (expiration)
 105   {
 106     send_length= snprintf(buffer, sizeof(buffer), "%llu", (unsigned long long)expiration);
 107   }
 108
 109   if (size_t(send_length) >= sizeof(buffer) or send_length < 0)
 110   {
 111     return memcached_set_error(*ptr, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
 112                                memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
 113   }
 114
 115   memcached_return_t rc= MEMCACHED_SUCCESS;
 116   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
 117   {
 118     memcached_instance_st* instance= memcached_instance_fetch(ptr, x);
 119
 120     libmemcached_io_vector_st vector[]=
 121     {
 122       { NULL, 0 },
 123       { memcached_literal_param("flush_all ") },
 124       { buffer, size_t(send_length) },
 125       { " noreply", reply ? 0 : memcached_literal_param_size(" noreply") },
 126       { memcached_literal_param("\r\n") }
 127     };
 128
 129     memcached_return_t rrc= memcached_vdo(instance, vector, 5, true);
 130     if (memcached_success(rrc) and reply == true)
 131     {
 132       char response_buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
 133       rrc= memcached_response(instance, response_buffer, sizeof(response_buffer), NULL);
 134     }
 135
 136     if (memcached_failed(rrc))
 137     {
 138       // If an error has already been reported, then don't add to it
 139       if (instance->error_messages == NULL or instance->root->error_messages == NULL)
 140       {
 141         memcached_set_error(*instance, rrc, MEMCACHED_AT);
 142       }
 143       rc= MEMCACHED_SOME_ERRORS;
 144     }
 145   }
 146
 147   return rc;
 148 }
 149
 150 memcached_return_t memcached_flush(memcached_st *shell, time_t expiration)
 151 {
 152   Memcached* ptr= memcached2Memcached(shell);
 153   memcached_return_t rc;
 154   if (memcached_failed(rc= initialize_query(ptr, true)))
 155   {
 156     return rc;
 157   }
 158
 159   bool reply= memcached_is_replying(ptr);
 160
 161   LIBMEMCACHED_MEMCACHED_FLUSH_START();
 162   if (memcached_is_binary(ptr))
 163   {
 164     rc= memcached_flush_binary(ptr, expiration, reply);
 165   }
 166   else
 167   {
 168     rc= memcached_flush_textual(ptr, expiration, reply);
 169   }
 170   LIBMEMCACHED_MEMCACHED_FLUSH_END();
 171
 172   return rc;
 173 }