git.m6w6.name Git - m6w6/libmemcached/blob - tests/virtual_buckets.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached Client and Server
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  All rights reserved.
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   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions are
  10  *  met:
  11  *
  12  *      * Redistributions of source code must retain the above copyright
  13  *  notice, this list of conditions and the following disclaimer.
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  15  *      * Redistributions in binary form must reproduce the above
  16  *  copyright notice, this list of conditions and the following disclaimer
  17  *  in the documentation and/or other materials provided with the
  18  *  distribution.
  19  *
  20  *      * The names of its contributors may not be used to endorse or
  21  *  promote products derived from this software without specific prior
  22  *  written permission.
  23  *
  24  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  */
  37
  38 #include <libtest/common.h>
  39
  40 #include <tests/virtual_buckets.h>
  41
  42 #include <libmemcached/memcached.h>
  43
  44 #include <cstring>
  45
  46 struct libtest_string_t {
  47   const char *c_str;
  48   size_t size;
  49 };
  50
  51 static inline libtest_string_t libtest_string(const char *arg, size_t arg_size)
  52 {
  53   libtest_string_t local= { arg, arg_size };
  54   return local;
  55 }
  56
  57 #define make_libtest_string(X) libtest_string((X), static_cast<size_t>(sizeof(X) - 1))
  58
  59 static libtest_string_t libtest_string_t_null= { 0, 0};
  60
  61 static bool libtest_string_is_null(const libtest_string_t &string)
  62 {
  63   if (string.c_str == 0 and string.size == 0)
  64     return true;
  65
  66   return false;
  67 }
  68
  69 struct expect_t {
  70   libtest_string_t key;
  71   uint32_t server_id;
  72   uint32_t bucket_id;
  73 };
  74
  75 expect_t basic_keys[]= {
  76   { make_libtest_string("hello"), 0, 0 },
  77   { make_libtest_string("doctor"), 0, 0 },
  78   { make_libtest_string("name"), 1, 3 },
  79   { make_libtest_string("continue"), 1, 3 },
  80   { make_libtest_string("yesterday"), 0, 0 },
  81   { make_libtest_string("tomorrow"), 1, 1 },
  82   { make_libtest_string("another key"), 2, 2 },
  83   { libtest_string_t_null, 0, 0 }
  84 };
  85
  86 test_return_t virtual_back_map(memcached_st *)
  87 {
  88   memcached_return_t rc;
  89   memcached_server_st *server_pool;
  90   memcached_st *memc;
  91
  92   memc= memcached_create(NULL);
  93   test_true(memc);
  94
  95   uint32_t server_map[] = { 0, 1, 2, 1 };
  96   rc= memcached_bucket_set(memc, server_map, NULL, 4, 2);
  97   test_true(rc == MEMCACHED_SUCCESS);
  98
  99   memcached_server_distribution_t dt;
 100   dt= memcached_behavior_get_distribution(memc);
 101   test_true(dt == MEMCACHED_DISTRIBUTION_VIRTUAL_BUCKET);
 102
 103   memcached_behavior_set_key_hash(memc, MEMCACHED_HASH_CRC);
 104   test_true(rc == MEMCACHED_SUCCESS);
 105
 106   memcached_hash_t hash_type= memcached_behavior_get_key_hash(memc);
 107   test_true(hash_type == MEMCACHED_HASH_CRC);
 108
 109   server_pool = memcached_servers_parse("localhost:11211, localhost1:11210, localhost2:11211");
 110   test_true(server_pool);
 111   memcached_server_push(memc, server_pool);
 112
 113   /* verify that the server list was parsed okay. */
 114   test_true(memcached_server_count(memc) == 3);
 115   test_true(strcmp(server_pool[0].hostname, "localhost") == 0);
 116   test_true(server_pool[0].port == 11211);
 117
 118   test_true(strcmp(server_pool[1].hostname, "localhost1") == 0);
 119   test_true(server_pool[1].port == 11210);
 120
 121   test_true(strcmp(server_pool[2].hostname, "localhost2") == 0);
 122   test_true(server_pool[2].port == 11211);
 123
 124   dt= memcached_behavior_get_distribution(memc);
 125   hash_type= memcached_behavior_get_key_hash(memc);
 126   test_true(dt == MEMCACHED_DISTRIBUTION_VIRTUAL_BUCKET);
 127   test_true(hash_type == MEMCACHED_HASH_CRC);
 128
 129   /* verify the standard ketama set. */
 130   for (expect_t *ptr= basic_keys; not libtest_string_is_null(ptr->key); ptr++)
 131   {
 132     uint32_t server_idx = memcached_generate_hash(memc, ptr->key.c_str, ptr->key.size);
 133
 134     char buffer[1024];
 135     snprintf(buffer, sizeof(buffer), "%.*s:%lu Got/Expected %u == %u", (int)ptr->key.size, ptr->key.c_str, (unsigned long)ptr->key.size, server_idx, ptr->server_id);
 136     test_true_got(server_idx == ptr->server_id, buffer);
 137   }
 138
 139   memcached_server_list_free(server_pool);
 140   memcached_free(memc);
 141
 142   return TEST_SUCCESS;
 143 }