+/*
+ * Summary: C++ interface for memcached server
+ *
+ * Copy: See Copyright for the status of this software.
+ *
+ * Authors: Padraig O'Sullivan <osullivan.padraig@gmail.com>
+ * Patrick Galbraith <patg@patg.net>
+ */
+
+/**
+ * @file memcached.hh
+ * @brief Libmemcached C++ interface
+ */
+
+#ifndef LIBMEMCACHEDPP_H
+#define LIBMEMCACHEDPP_H
+
#include <libmemcached/memcached.h>
+#include <string.h>
+
#include <string>
#include <vector>
+/**
+ * This is the core memcached library (if later, other objects
+ * are needed, they will be created from this class).
+ */
class Memcached
{
public:
memcached_clone(&memc, clone);
}
+ Memcached(const Memcached &rhs)
+ :
+ memc(),
+ result()
+ {
+ memcached_clone(&memc, const_cast<memcached_st *>(&rhs.getImpl()));
+ }
+
~Memcached()
{
memcached_free(&memc);
}
+ /**
+ * Get the internal memcached_st *
+ */
+ memcached_st &getImpl()
+ {
+ return memc;
+ }
+
+ /**
+ * Get the internal memcached_st *
+ */
+ const memcached_st &getImpl() const
+ {
+ return memc;
+ }
+
+ /**
+ * Return an error string for the given return structure.
+ *
+ * @param[in] rc a memcached_return structure
+ * @return error string corresponding to given return code in the library.
+ */
+ const std::string getError(memcached_return rc) const
+ {
+ /* first parameter to strerror is unused */
+ return memcached_strerror(NULL, rc);
+ }
+
bool fetch(std::string &key,
- std::string &ret_val,
- size_t *key_length,
- size_t *value_length,
+ std::vector<char> &ret_val,
uint32_t *flags,
memcached_return *rc)
{
char ret_key[MEMCACHED_MAX_KEY];
- char *value= memcached_fetch(&memc, ret_key, key_length,
- value_length, flags, rc);
+ size_t value_length= 0;
+ size_t key_length= 0;
+ char *value= memcached_fetch(&memc, ret_key, &key_length,
+ &value_length, flags, rc);
if (value)
{
- ret_val.assign(value);
+ ret_val.reserve(value_length);
+ memcpy(&*ret_val.begin(), value, value_length);
key.assign(ret_key);
return true;
}
return false;
}
- std::string get(const std::string &key, size_t *value_length)
+ std::vector<char> &get(const std::string &key,
+ std::vector<char> &ret_val)
{
- uint32_t flags;
+ uint32_t flags= 0;
memcached_return rc;
- std::string ret_val;
+ size_t value_length= 0;
char *value= memcached_get(&memc, key.c_str(), key.length(),
- value_length, &flags, &rc);
- if (value)
+ &value_length, &flags, &rc);
+ if (value != NULL)
{
- ret_val.assign(value);
+ ret_val.reserve(value_length);
+ memcpy(&ret_val[0], value, value_length);
}
return ret_val;
}
- std::string get_by_key(const std::string &master_key,
- const std::string &key,
- size_t *value_length)
+ std::vector<char> &getByKey(const std::string &master_key,
+ const std::string &key,
+ std::vector<char> &ret_val)
{
- uint32_t flags;
+ uint32_t flags= 0;
memcached_return rc;
- std::string ret_val;
+ size_t value_length= 0;
- char *value= memcached_get_by_key(&memc, master_key.c_str(), master_key.length(),
+ char *value= memcached_get_by_key(&memc,
+ master_key.c_str(), master_key.length(),
key.c_str(), key.length(),
- value_length, &flags, &rc);
+ &value_length, &flags, &rc);
if (value)
{
- ret_val.assign(value);
+ ret_val.reserve(value_length);
+ memcpy(&*ret_val.begin(), value, value_length);
}
return ret_val;
}
}
bool set(const std::string &key,
- const std::string &value,
+ const std::vector<char> &value,
time_t expiration,
uint32_t flags)
{
memcached_return rc= memcached_set(&memc,
key.c_str(), key.length(),
- value.c_str(), value.length(),
+ &value[0], value.size(),
expiration, flags);
return (rc == MEMCACHED_SUCCESS || rc == MEMCACHED_BUFFERED);
}
- bool set_all(std::vector<std::string> &keys,
- std::vector<std::string> &values,
- time_t expiration,
- uint32_t flags)
+ bool setAll(std::vector<std::string> &keys,
+ std::vector< std::vector<char> > &values,
+ time_t expiration,
+ uint32_t flags)
{
if (keys.size() != values.size())
{
}
bool retval= true;
std::vector<std::string>::iterator key_it= keys.begin();
- std::vector<std::string>::iterator val_it= values.begin();
+ std::vector< std::vector<char> >::iterator val_it= values.begin();
while (key_it != keys.end())
{
retval= set((*key_it), (*val_it), expiration, flags);
return retval;
}
- bool set_by_key(const std::string &master_key,
- const std::string &key,
- const std::string &value,
- time_t expiration,
- uint32_t flags)
+ bool setByKey(const std::string &master_key,
+ const std::string &key,
+ const std::vector<char> &value,
+ time_t expiration,
+ uint32_t flags)
{
memcached_return rc= memcached_set_by_key(&memc, master_key.c_str(),
master_key.length(),
key.c_str(), key.length(),
- value.c_str(), value.length(),
+ &value[0], value.size(),
expiration,
flags);
return (rc == MEMCACHED_SUCCESS);
}
- bool add(const std::string &key, const std::string &value)
+ bool add(const std::string &key, const std::vector<char> &value)
{
memcached_return rc= memcached_add(&memc, key.c_str(), key.length(),
- value.c_str(), value.length(), 0, 0);
+ &value[0], value.size(), 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
- bool add_by_key(const std::string &master_key,
- const std::string &key,
- const std::string &value)
+ bool addByKey(const std::string &master_key,
+ const std::string &key,
+ const std::vector<char> &value)
{
memcached_return rc= memcached_add_by_key(&memc,
master_key.c_str(),
master_key.length(),
key.c_str(),
key.length(),
- value.c_str(),
- value.length(),
+ &value[0],
+ value.size(),
0, 0);
return (rc == MEMCACHED_SUCCESS);
}
- bool replace(const std::string &key, const std::string &value)
+ bool replace(const std::string &key, const std::vector<char> &value)
{
memcached_return rc= memcached_replace(&memc, key.c_str(), key.length(),
- value.c_str(), value.length(),
+ &value[0], value.size(),
0, 0);
return (rc == MEMCACHED_SUCCESS);
}
- bool replace_by_key(const std::string &master_key,
- const std::string &key,
- const std::string &value)
+ bool replaceByKey(const std::string &master_key,
+ const std::string &key,
+ const std::vector<char> &value)
{
memcached_return rc= memcached_replace_by_key(&memc,
master_key.c_str(),
master_key.length(),
key.c_str(),
key.length(),
- value.c_str(),
- value.length(),
+ &value[0],
+ value.size(),
0, 0);
return (rc == MEMCACHED_SUCCESS);
}
- bool prepend(const std::string &key, const std::string &value)
+ bool prepend(const std::string &key, const std::vector<char> &value)
{
memcached_return rc= memcached_prepend(&memc, key.c_str(), key.length(),
- value.c_str(), value.length(), 0, 0);
+ &value[0], value.size(), 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
- bool prepend_by_key(const std::string &master_key,
- const std::string &key,
- const std::string &value)
+ bool prependByKey(const std::string &master_key,
+ const std::string &key,
+ const std::vector<char> &value)
{
memcached_return rc= memcached_prepend_by_key(&memc,
master_key.c_str(),
master_key.length(),
key.c_str(),
key.length(),
- value.c_str(),
- value.length(),
+ &value[0],
+ value.size(),
0,
0);
return (rc == MEMCACHED_SUCCESS);
}
- bool append(const std::string &key, const std::string &value)
+ bool append(const std::string &key, const std::vector<char> &value)
{
memcached_return rc= memcached_append(&memc,
key.c_str(),
key.length(),
- value.c_str(),
- value.length(),
+ &value[0],
+ value.size(),
0, 0);
return (rc == MEMCACHED_SUCCESS);
}
- bool append_by_key(const std::string &master_key,
- const std::string &key,
- const std::string &value)
+ bool appendByKey(const std::string &master_key,
+ const std::string &key,
+ const std::vector<char> &value)
{
memcached_return rc= memcached_append_by_key(&memc,
master_key.c_str(),
master_key.length(),
key.c_str(),
key.length(),
- value.c_str(),
- value.length(),
+ &value[0],
+ value.size(),
0, 0);
return (rc == MEMCACHED_SUCCESS);
}
bool cas(const std::string &key,
- const std::string &value,
+ const std::vector<char> &value,
uint64_t cas_arg)
{
memcached_return rc= memcached_cas(&memc, key.c_str(), key.length(),
- value.c_str(), value.length(),
+ &value[0], value.size(),
0, 0, cas_arg);
return (rc == MEMCACHED_SUCCESS);
}
- bool cas_by_key(const std::string &master_key,
- const std::string &key,
- const std::string &value,
- uint64_t cas_arg)
+ bool casByKey(const std::string &master_key,
+ const std::string &key,
+ const std::vector<char> &value,
+ uint64_t cas_arg)
{
memcached_return rc= memcached_cas_by_key(&memc,
master_key.c_str(),
master_key.length(),
key.c_str(),
key.length(),
- value.c_str(),
- value.length(),
+ &value[0],
+ value.size(),
0, 0, cas_arg);
return (rc == MEMCACHED_SUCCESS);
}
- // using 'remove' vs. 'delete' since 'delete' is a keyword
bool remove(const std::string &key)
{
memcached_return rc= memcached_delete(&memc, key.c_str(), key.length(), 0);
return (rc == MEMCACHED_SUCCESS);
}
- bool delete_by_key(const std::string &master_key,
- const std::string &key)
+ bool removeByKey(const std::string &master_key,
+ const std::string &key)
{
memcached_return rc= memcached_delete_by_key(&memc,
master_key.c_str(),
return (rc == MEMCACHED_SUCCESS);
}
- bool fetch_execute(memcached_execute_function *callback,
- void *context,
- unsigned int num_of_callbacks)
+ bool fetchExecute(memcached_execute_function *callback,
+ void *context,
+ unsigned int num_of_callbacks)
{
memcached_return rc= memcached_fetch_execute(&memc,
callback,
return (rc == MEMCACHED_SUCCESS);
}
- const std::string lib_version() const
+ /**
+ * Get the library version string.
+ * @return std::string containing a copy of the library version string.
+ */
+ const std::string libVersion() const
{
const char *ver= memcached_lib_version();
const std::string version(ver);
}
private:
+
memcached_st memc;
memcached_result_st result;
};
+
+#endif /* LIBMEMCACHEDPP_H */
void world_destroy(void *p);
}
+static void populate_vector(vector<char> &vec, const string &str)
+{
+ vec.reserve(str.length());
+ memcpy(&*vec.begin(), str.c_str(), str.length());
+}
+
+static void copy_vec_to_string(vector<char> &vec, string &str)
+{
+ str.clear();
+ char *tmp= static_cast<char *>(malloc(vec.size() * sizeof(char)));
+ if (!vec.empty())
+ {
+ memcpy(tmp, &vec[0], vec.size());
+ str.assign(tmp);
+ }
+}
+
test_return basic_test(memcached_st *memc)
{
Memcached foo(memc);
const string value_set("This is some data");
- string value;
- size_t value_length;
+ std::vector<char> value;
+ std::vector<char> test_value;
+
+ populate_vector(value, value_set);
- foo.set("mine", value_set, 0, 0);
- value= foo.get("mine", &value_length);
+ foo.set("mine", value, 0, 0);
+ test_value= foo.get("mine", test_value);
- assert((memcmp(value.c_str(), value_set.c_str(), value_length) == 0));
+ assert((memcmp(&test_value[0], &value[0], test_value.size()) == 0));
return TEST_SUCCESS;
}
{
Memcached mcach(memc);
bool rc;
- const string key("inctest");
+ const string key("blah");
const string inc_value("1");
- string ret_value;
+ std::vector<char> inc_val;
+ vector<char> ret_value;
+ string ret_string;
uint64_t int_inc_value;
uint64_t int_ret_value;
- size_t value_length;
- mcach.set(key, inc_value, 0, 0);
- ret_value= mcach.get(key, &value_length);
- printf("\nretvalue %s\n",ret_value.c_str());
+ populate_vector(inc_val, inc_value);
+
+ rc= mcach.set(key, inc_val, 0, 0);
+ if (rc == false)
+ {
+ return TEST_FAILURE;
+ }
+ ret_value= mcach.get(key, ret_value);
+ if (ret_value.empty())
+ {
+ return TEST_FAILURE;
+ }
+ copy_vec_to_string(ret_value, ret_string);
+
+ printf("string is: %s\n", ret_string.c_str());
+
int_inc_value= uint64_t(atol(inc_value.c_str()));
- int_ret_value= uint64_t(atol(ret_value.c_str()));
+ int_ret_value= uint64_t(atol(ret_string.c_str()));
assert(int_ret_value == int_inc_value);
rc= mcach.increment(key, 1, &int_ret_value);
{
Memcached foo(memc);
const string value_set("Data for server A");
+ vector<char> value;
+ vector<char> test_value;
const string master_key_a("server-a");
const string master_key_b("server-b");
const string key("xyz");
- string value;
- size_t value_length;
- foo.set_by_key(master_key_a, key, value_set, 0, 0);
- value= foo.get_by_key(master_key_a, key, &value_length);
+ populate_vector(value, value_set);
+
+ foo.setByKey(master_key_a, key, value, 0, 0);
+ test_value= foo.getByKey(master_key_a, key, test_value);
+
+ assert((memcmp(&value[0], &test_value[0], value.size()) == 0));
- assert((memcmp(value.c_str(), value_set.c_str(), value_length) == 0));
+ test_value.clear();
- value= foo.get_by_key(master_key_b, key, &value_length);
- assert((memcmp(value.c_str(), value_set.c_str(), value_length) == 0));
+ test_value= foo.getByKey(master_key_b, key, test_value);
+ assert((memcmp(&value[0], &test_value[0], value.size()) == 0));
return TEST_SUCCESS;
}
string key2("son");
string key3("food");
vector<string> keys;
+ vector< vector<char> > values;
+ vector<char> val1;
+ vector<char> val2;
+ vector<char> val3;
+ populate_vector(val1, key1);
+ populate_vector(val2, key2);
+ populate_vector(val3, key3);
keys.reserve(3);
keys.push_back(key1);
keys.push_back(key2);
keys.push_back(key3);
+ values.reserve(3);
+ values.push_back(val1);
+ values.push_back(val2);
+ values.push_back(val3);
unsigned int counter;
memcached_execute_function callbacks[1];
/* We need to empty the server before we continue the test */
rc= mc.flush(0);
- rc= mc.set_all(keys, keys, 50, 9);
+ rc= mc.setAll(keys, values, 50, 9);
assert(rc == true);
rc= mc.mget(keys);
callbacks[0]= &callback_counter;
counter= 0;
- rc= mc.fetch_execute(callbacks, static_cast<void *>(&counter), 1);
+ rc= mc.fetchExecute(callbacks, static_cast<void *>(&counter), 1);
assert(counter == 3);
bool rc;
memcached_return mc_rc;
vector<string> keys;
+ vector< vector<char> > values;
keys.reserve(3);
keys.push_back("fudge");
keys.push_back("son");
keys.push_back("food");
+ vector<char> val1;
+ vector<char> val2;
+ vector<char> val3;
+ populate_vector(val1, "fudge");
+ populate_vector(val2, "son");
+ populate_vector(val3, "food");
+ values.reserve(3);
+ values.push_back(val1);
+ values.push_back(val2);
+ values.push_back(val3);
uint32_t flags;
string return_key;
- size_t return_key_length;
- string return_value;
- size_t return_value_length;
+ vector<char> return_value;
/* We need to empty the server before we continue the test */
rc= mc.flush(0);
rc= mc.mget(keys);
assert(rc == true);
- while (mc.fetch(return_key, return_value, &return_key_length,
- &return_value_length, &flags, &mc_rc))
+ while (mc.fetch(return_key, return_value,
+ &flags, &mc_rc))
{
- assert(return_value.length() != 0);
+ assert(return_value.size() != 0);
+ return_value.clear();
}
- assert(return_value_length == 0);
assert(mc_rc == MEMCACHED_END);
- rc= mc.set_all(keys, keys, 50, 9);
+ rc= mc.setAll(keys, values, 50, 9);
assert(rc == true);
rc= mc.mget(keys);
assert(rc == true);
- while ((mc.fetch(return_key, return_value, &return_key_length,
- &return_value_length, &flags, &mc_rc)))
+ while ((mc.fetch(return_key, return_value,
+ &flags, &mc_rc)))
{
- assert(return_value.length() != 0);
assert(mc_rc == MEMCACHED_SUCCESS);
- assert(return_key_length == return_value_length);
- assert(!memcmp(return_value.c_str(), return_key.c_str(), return_value_length));
+ assert(return_key.length() == return_value.size());
+ assert(!memcmp(&return_value[0], return_key.c_str(), return_value.size()));
}
return TEST_SUCCESS;
projects / awesomized / libmemcached / commitdiff
