5 Examples for libmemcached
12 For full examples, test cases are found in tests/\*.c in the main
13 distribution. These are always up to date, and are used for each test run of
16 ------------------------------
17 Creating and Freeing structure
18 ------------------------------
24 memcached_return_t rc;
26 memc= memcached_create(NULL);
31 The above code would create a connection and then free the connection when
43 memcached_server_st *servers;
44 memcached_st *memc= memcached_create(NULL);
45 char servername[]= "0.example.com";
47 servers= memcached_server_list_append(NULL, servername, 400, &rc);
49 for (x= 0; x < 20; x++)
51 char buffer[SMALL_STRING_LEN];
53 snprintf(buffer, SMALL_STRING_LEN, "%u.example.com", 400+x);
54 servers= memcached_server_list_append(servers, buffer, 401, &rc);
56 rc= memcached_server_push(memc, servers);
57 memcached_server_free(servers);
61 In the above code you create a \ ``memcached_st``\ object that you then feed in a
62 single host into. In the for loop you build a \ ``memcached_server_st``\
63 pointer that you then later feed via memcached_server_push() into the
64 \ ``memcached_st``\ structure.
66 You can reuse the \ ``memcached_server_st``\ object with multile \ ``memcached_st``\
70 ----------------------------
71 Adding a value to the server
72 ----------------------------
80 size_t value_length= 8191;
83 value = (char*)malloc(value_length);
86 for (x= 0; x < value_length; x++)
87 value[x] = (char) (x % 127);
89 for (x= 0; x < 1; x++)
91 rc= memcached_set(memc, key, strlen(key),
93 (time_t)0, (uint32_t)0);
94 assert(rc == MEMCACHED_SUCCESS);
100 It is best practice to always look at the return value of any operation.
103 ------------------------
104 Fetching multiple values
105 ------------------------
111 memcached_return_t rc;
112 char *keys[]= {"fudge", "son", "food"};
113 size_t key_length[]= {5, 3, 4};
117 char return_key[MEMCACHED_MAX_KEY];
118 size_t return_key_length;
120 size_t return_value_length;
122 rc= memcached_mget(memc, keys, key_length, 3);
125 while ((return_value= memcached_fetch(memc, return_key, &return_key_length,
126 &return_value_length, &flags, &rc)))
133 Notice that you freed values returned from memcached_fetch(). The define
134 \ ``MEMCACHED_MAX_KEY``\ is provided for usage.
143 To find out more information please check:
144 `https://launchpad.net/libmemcached <https://launchpad.net/libmemcached>`_
152 :manpage:`memcached(1)`