X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=docs%2Flibmemcached_examples.rst;h=a43ee1a2a11f77a07cffd6614531359ab9e0d13b;hb=8cf5f36e16ecaf6e1e7622a3a7cad81491602b0d;hp=82e2858852f825e9a326d06650b1d5e53941eba3;hpb=1eae35aca01e152e10113cd97b7571ebd6eb5bd9;p=awesomized%2Flibmemcached diff --git a/docs/libmemcached_examples.rst b/docs/libmemcached_examples.rst index 82e28588..a43ee1a2 100644 --- a/docs/libmemcached_examples.rst +++ b/docs/libmemcached_examples.rst @@ -1,128 +1,122 @@ -.. highlight:: perl +======== +Examples +======== +Examples for libmemcached -**** -NAME -**** - - -libmemcached_examples - Examples for libmemcached - - -*********** +----------- DESCRIPTION -*********** +----------- For full examples, test cases are found in tests/\*.c in the main distribution. These are always up to date, and are used for each test run of the library. -Creating and Freeing structure -============================== +--------------------- +Connecting to servers +--------------------- -.. code-block:: perl +.. code-block:: c - memcached_st *memc; - memcached_return_t rc; - - memc= memcached_create(NULL); - ...do stuff... + const char *config_string= "--SERVER=host10.example.com --SERVER=host11.example.com --SERVER=host10.example.com" + memcached_st *memc= memcached(config_string, strlen(config_string); + { + ... + } memcached_free(memc); -The above code would create a connection and then free the connection when -finished. +In the above code you create a :c:type:`memcached_st` object with three server +by making use of :c:func:`memcached_create`. -Connecting to servers -===================== +-------------------------- +Creating a pool of servers +-------------------------- -.. code-block:: perl +.. code-block:: c - memcached_server_st *servers; - memcached_st *memc= memcached_create(NULL); - char servername[]= "0.example.com"; - - servers= memcached_server_list_append(NULL, servername, 400, &rc); - - for (x= 0; x < 20; x++) - { - char buffer[SMALL_STRING_LEN]; - - snprintf(buffer, SMALL_STRING_LEN, "%u.example.com", 400+x); - servers= memcached_server_list_append(servers, buffer, 401, &rc); - } - rc= memcached_server_push(memc, servers); - memcached_server_free(servers); - memcached_free(memc); +Creating a pool of Servers:: + + const char *config_string= "--SERVER=host10.example.com --SERVER=host11.example.com --SERVER=host10.example.com"; + + memcached_pool_st* pool= memcached_pool(config_string, strlen(config_string)); + + memcached_return_t rc; + + memcached_st *memc= memcached_pool_pop(pool, false, &rc); + + .... do work + /* + Release the memc_ptr that was pulled from the pool + */ + memcached_pool_push(pool, memc); -In the above code you create a \ ``memcached_st``\ object that you then feed in a -single host into. In the for loop you build a \ ``memcached_server_st``\ -pointer that you then later feed via memcached_server_push() into the -\ ``memcached_st``\ structure. + /* + Destroy the pool. + */ + memcached_pool_destroy(pool); -You can reuse the \ ``memcached_server_st``\ object with multile \ ``memcached_st``\ -structures. +In the above code you create a :c:type:`memcached_pool_st` object with three +server by making use of :c:func:`memcached_pool()`. + +When :c:func:`memcached_pool_destroy()` all memory will be released that is associated +with the pool. + + +---------------------------- Adding a value to the server -============================ +---------------------------- + +.. code-block:: c -.. code-block:: perl +Adding a value to the Server:: char *key= "foo"; - char *value; - size_t value_length= 8191; - unsigned int x; - - value = (char*)malloc(value_length); - assert(value); - - for (x= 0; x < value_length; x++) - value[x] = (char) (x % 127); - - for (x= 0; x < 1; x++) + char *value= "value"; + + memcached_return_t rc= memcached_set(memc, key, strlen(key), value, value_length, (time_t)0, (uint32_t)0); + + if (rc != MEMCACHED_SUCCESS) { - rc= memcached_set(memc, key, strlen(key), - value, value_length, - (time_t)0, (uint32_t)0); - assert(rc == MEMCACHED_SUCCESS); + ... // handle failure } - - free(value); It is best practice to always look at the return value of any operation. +------------------------ Fetching multiple values -======================== +------------------------ -.. code-block:: perl +.. code-block:: c memcached_return_t rc; char *keys[]= {"fudge", "son", "food"}; size_t key_length[]= {5, 3, 4}; unsigned int x; uint32_t flags; - + char return_key[MEMCACHED_MAX_KEY]; size_t return_key_length; char *return_value; size_t return_value_length; - + rc= memcached_mget(memc, keys, key_length, 3); - + x= 0; while ((return_value= memcached_fetch(memc, return_key, &return_key_length, &return_value_length, &flags, &rc))) @@ -133,31 +127,23 @@ Fetching multiple values Notice that you freed values returned from memcached_fetch(). The define -\ ``MEMCACHED_MAX_KEY``\ is provided for usage. +:c:type:`MEMCACHED_MAX_KEY` is provided for usage. -**** +---- HOME -**** +---- To find out more information please check: -`https://launchpad.net/libmemcached `_ - - -****** -AUTHOR -****** - - -Brian Aker, +`http://libmemcached.org/ `_ -******** +-------- SEE ALSO -******** +-------- -memcached(1) +:manpage:`memcached(1)`