git.m6w6.name Git - m6w6/libmemcached/blob - docs/man/libmemcached_examples.3

   1 .TH "LIBMEMCACHED_EXAMPLES" "3" "July 05, 2012" "1.0.9" "libmemcached"
   2 .SH NAME
   3 libmemcached_examples \- libmemcached Documentation
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  34 Examples for libmemcached
  35 .SH DESCRIPTION
  36 .sp
  37 For full examples, test cases are found in tests/*.c in the main
  38 distribution. These are always up to date, and are used for each test run of
  39 the library.
  40 .SH CONNECTING TO SERVERS
  41 .sp
  42 .nf
  43 .ft C
  44 const char *config_string= "\-\-SERVER=host10.example.com \-\-SERVER=host11.example.com \-\-SERVER=host10.example.com"
  45 memcached_st *memc= memcached(config_string, strlen(config_string);
  46 {
  47 \&...
  48 }
  49  memcached_free(memc);
  50 .ft P
  51 .fi
  52 .sp
  53 In the above code you create a \fBmemcached_st\fP object with three server
  54 by making use of \fBmemcached_create()\fP.
  55 .SH CREATING A POOL OF SERVERS
  56 .sp
  57 .nf
  58 .ft C
  59
  60 .ft P
  61 .fi
  62 .sp
  63 Creating a pool of Servers:
  64 .sp
  65 .nf
  66 .ft C
  67 const char *config_string= "\-\-SERVER=host10.example.com \-\-SERVER=host11.example.com \-\-SERVER=host10.example.com";
  68
  69 memcached_pool_st* pool= memcached_pool(config_string, strlen(config_string));
  70
  71 memcached_return_t rc;
  72
  73 memcached_st *memc= memcached_pool_pop(pool, false, &rc);
  74
  75 \&.... do work
  76
  77 /*
  78   Release the memc_ptr that was pulled from the pool
  79 */
  80 memcached_pool_push(pool, memc);
  81
  82 /*
  83   Destroy the pool.
  84 */
  85 memcached_pool_destroy(pool);
  86 .ft P
  87 .fi
  88 .sp
  89 In the above code you create a \fBmemcached_pool_st\fP object with three
  90 server by making use of \fBmemcached_pool()\fP.
  91 .sp
  92 When \fBmemcached_pool_destroy()\fP all memory will be released that is associated
  93 with the pool.
  94 .SH ADDING A VALUE TO THE SERVER
  95 .sp
  96 .nf
  97 .ft C
  98
  99 .ft P
 100 .fi
 101 .sp
 102 Adding a value to the Server:
 103 .sp
 104 .nf
 105 .ft C
 106 char *key= "foo";
 107 char *value= "value";
 108
 109 memcached_return_t rc= memcached_set(memc, key, strlen(key), value, value_length, (time_t)0, (uint32_t)0);
 110
 111 if (rc != MEMCACHED_SUCCESS)
 112 {
 113 \&... // handle failure
 114 }
 115 .ft P
 116 .fi
 117 .sp
 118 It is best practice to always look at the return value of any operation.
 119 .SH FETCHING MULTIPLE VALUES
 120 .sp
 121 .nf
 122 .ft C
 123 memcached_return_t rc;
 124 char *keys[]= {"fudge", "son", "food"};
 125 size_t key_length[]= {5, 3, 4};
 126 unsigned int x;
 127 uint32_t flags;
 128
 129 char return_key[MEMCACHED_MAX_KEY];
 130 size_t return_key_length;
 131 char *return_value;
 132 size_t return_value_length;
 133
 134 rc= memcached_mget(memc, keys, key_length, 3);
 135
 136 x= 0;
 137 while ((return_value= memcached_fetch(memc, return_key, &return_key_length,
 138                                       &return_value_length, &flags, &rc)))
 139 {
 140   free(return_value);
 141   x++;
 142 }
 143 .ft P
 144 .fi
 145 .sp
 146 Notice that you freed values returned from memcached_fetch(). The define
 147 \fBMEMCACHED_MAX_KEY\fP is provided for usage.
 148 .SH HOME
 149 .sp
 150 To find out more information please check:
 151 \fI\%http://libmemcached.org/\fP
 152 .SH SEE ALSO
 153 .sp
 154 \fImemcached(1)\fP
 155 .SH AUTHOR
 156 Brian Aker
 157 .SH COPYRIGHT
 158 2011, Brian Aker DataDifferential, http://datadifferential.com/
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