/**
* Places a segment of data before the last piece of data stored.
*
* @param[in] key key of object whose value we will prepend data to
* @param[in] value data to prepend to object's value
* @return true on success; false otherwise
*/
bool prepend(const std::string &key, const std::vector<char> &value)
{
if (key.empty() || value.empty())
{
return false;
}
memcached_return rc= memcached_prepend(&memc, key.c_str(), key.length(),
&value[0], value.size(), 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
/**
* @function memcached.prepend
*
* ### Synopsis
*
* var rc = memcached.prepend(handle, key, value);
* var rc = memcached.prepend(handle, key, value, expiration);
* var rc = memcached.prepend(handle, key, value, expiration, flags);
*
* Prepends the given value string to the value of an existing item.
*
* If an object identified by key does not exist, an error occurs.
*
* @param {object} handle - handle to memcached connection.
* @param {string} key - key of data to set in memcached.
* @param {string} value - value of data to prepend in memcached.
* @param {int} expiration - length of time value is valid (after this it will be removed from memcached automatically).
* @param {int} flags - user defined integer value stored along with the value.
* @return {int} rc - result code; 0 if no error, otherwise the error code.
*/
JSVAL _memcached_prepend (JSARGS args) {
HandleScope scope;
M *handle = HANDLE(args[0]);
String::Utf8Value key(args[1]);
String::Utf8Value value(args[2]);
time_t expiration = 0;
if (args.Length() > 3) {
expiration = args[3]->IntegerValue();
}
uint32_t flags = 0;
if (args.Length() > 4) {
flags = args[4]->IntegerValue();
}
return scope.Close(Integer::New(memcached_prepend(handle, *key, strlen(*key), *value, strlen(*value), expiration, flags)));
}
/*doc Memcached prepend(key, value)
Asks memcached to add this value to an existing key before existing value.
Returns true on success, otherwise raises an exception.
value should be a Sequence.
Supported by memcached 1.2.4+
*/
IoObject *IoMemcached_prepend(IoMemcached *self, IoObject *locals, IoMessage *m)
{
IoSeq *key = IoMessage_locals_seqArgAt_(m, locals, 0);
IoSeq *value = IoMessage_locals_seqArgAt_(m, locals, 1);
memcached_return_t rc;
rc = memcached_prepend(DATA(self)->mc,
CSTRING(key), IOSEQ_LENGTH(key),
CSTRING(value), IOSEQ_LENGTH(value),
0, 0
);
if(rc != MEMCACHED_SUCCESS)
IoState_error_(IOSTATE, m, memcached_strerror(DATA(self)->mc, rc));
return IOSTATE->ioTrue;
}
Memcache_Res CMemcache:: Memcac_Prepend(string strKey, const char* pValue, size_t val_size, time_t expiration)
{
Memcache_Res mRes = MEMCACHED_SUCCESS;
if(strKey.empty() || NULL == pValue)
return static_cast<Memcache_Res>(MEMCACHED_INVALID_ARGUMENTS);
// lock and prepend
pthread_mutex_lock(&m_hmc_mutex);
if(NULL == m_hMc)
return MEMCACHED_SERVER_ERROR;
mRes = memcached_prepend(m_hMc, strKey.c_str(), strKey.length(), pValue, val_size, expiration, 0);
if(MEMCACHED_NOTSTORED == mRes)
mRes = memcached_add(m_hMc, strKey.c_str(), strKey.length(), pValue, val_size, expiration, 0);
pthread_mutex_unlock(&m_hmc_mutex);
return mRes;
}
VALUE mc_prepend(VALUE self, VALUE key, VALUE value) {
memcached_st *mc;
static memcached_return_t result;
Data_Get_Struct(self, memcached_st, mc);
key = StringValue(key);
if (!use_binary(mc)) key = escape_key(key, NULL);
value = StringValue(value);
result = memcached_prepend(mc, RSTRING_PTR(key), RSTRING_LEN(key), RSTRING_PTR(value), RSTRING_LEN(value), 0, 0);
if (result == MEMCACHED_SUCCESS) {
return Qtrue;
} else if(result == MEMCACHED_NOTSTORED) {
return Qfalse;
} else {
return throw_error(&result);
}
}
virtual void execute(memcached_st* mem) {
this->debug && printf("%s %s (%zu): %s (%zu)\n", "PrependJob execute", key.c_str(), key.size(), value.c_str(), value.size());
rc = memcached_prepend(mem, key.c_str(), key.size(), value.c_str(), value.size(), 0, (uint32_t)0);
}
rc= memc_get_servers(&container->memc);
initid->ptr= (char *)container;
return 0;
}
long long memc_prepend(UDF_INIT *initid, UDF_ARGS *args,
__attribute__ ((unused)) char *is_null,
__attribute__ ((unused)) char *error)
{
memcached_return rc;
memc_function_st *container= (memc_function_st *)initid->ptr;
rc= memcached_prepend(&container->memc,
args->args[0], (size_t)args->lengths[0],
args->args[1], (size_t)args->lengths[1],
container->expiration, (uint16_t)0);
return ((long long)rc);
}
void memc_prepend_deinit(UDF_INIT *initid)
{
/* if we allocated initid->ptr, free it here */
memc_function_st *container= (memc_function_st *)initid->ptr;
memcached_free(&container->memc);
free(container);
}
my_bool memc_prepend_by_key_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
