* @brief Libmemcached C++ interface
*/
-#ifndef LIBMEMCACHEDPP_H
-#define LIBMEMCACHEDPP_H
+#pragma once
#include <libmemcached/memcached.h>
+#include <libmemcached/exception.hpp>
#include <string.h>
{
public:
- Memcache()
- :
- servers_list(),
- memc(),
- servers(NULL),
- result()
+ Memcache()
{
- memcached_create(&memc);
+ memc= memcached("", 0);
}
- Memcache(const std::string &in_servers_list)
- :
- servers_list(in_servers_list),
- memc(),
- servers(NULL),
- result()
+ Memcache(const std::string &config)
{
- memcached_create(&memc);
- servers= memcached_servers_parse(servers_list.c_str());
+ memc= memcached(config.c_str(), config.size());
}
- Memcache(const std::string &hostname,
- unsigned int port)
- :
- servers_list(),
- memc(),
- servers(NULL),
- result()
+ Memcache(const std::string &hostname, in_port_t port)
{
- memcached_create(&memc);
- servers_list.append(hostname);
- servers_list.append(":");
- std::ostringstream strsmt;
- strsmt << port;
- servers_list.append(strsmt.str());
- servers= memcached_servers_parse(servers_list.c_str());
+ memc= memcached("", 0);
+ if (memc)
+ memcached_server_add(memc, hostname.c_str(), port);
}
- Memcache(memcached_st *clone)
- :
- servers_list(),
- memc(),
- servers(NULL),
- result()
+ Memcache(memcached_st *clone)
{
- memcached_clone(&memc, clone);
+ memc= memcached_clone(NULL, clone);
}
Memcache(const Memcache &rhs)
- :
- servers_list(rhs.servers_list),
- memc(),
- servers(NULL),
- result()
{
- memcached_clone(&memc, const_cast<memcached_st *>(&rhs.getImpl()));
- servers= memcached_servers_parse(servers_list.c_str());
+ memc= memcached_clone(NULL, rhs.getImpl());
}
Memcache &operator=(const Memcache &rhs)
{
if (this != &rhs)
{
- memcached_clone(&memc, const_cast<memcached_st *>(&rhs.getImpl()));
- servers= memcached_servers_parse(servers_list.c_str());
+ memcached_free(memc);
+ memc= memcached_clone(NULL, rhs.getImpl());
}
+
return *this;
}
~Memcache()
{
- memcached_free(&memc);
- memcached_server_list_free(servers);
+ memcached_free(memc);
}
/**
* Get the internal memcached_st *
*/
- memcached_st &getImpl()
- {
- return memc;
- }
-
- /**
- * Get the internal memcached_st *
- */
- const memcached_st &getImpl() const
+ const memcached_st *getImpl() const
{
return memc;
}
/**
* Return an error string for the given return structure.
*
- * @param[in] rc a memcached_return structure
+ * @param[in] rc a memcached_return_t structure
* @return error string corresponding to given return code in the library.
*/
- const std::string getError(memcached_return rc) const
+ const std::string getError(memcached_return_t rc) const
{
/* first parameter to strerror is unused */
return memcached_strerror(NULL, rc);
}
+
+ bool setBehavior(memcached_behavior_t flag, uint64_t data)
+ {
+ return (memcached_success(memcached_behavior_set(memc, flag, data)));
+ }
+
+ uint64_t getBehavior(memcached_behavior_t flag)
+ {
+ return memcached_behavior_get(memc, flag);
+ }
+
/**
- * Return the string which contains the list of memcached servers being
- * used.
+ * Configure the memcache object
*
- * @return a std::string containing the list of memcached servers
+ * @param[in] in_config configuration
+ * @return true on success; false otherwise
*/
- const std::string getServersList() const
+ bool configure(const std::string &configuration)
{
- return servers_list;
+ return (memcached_success(memcached_parse_configuration(memc, configuration.c_str(), configuration.size())));
}
/**
- * Set the list of memcached servers to use.
+ * Add a server to the list of memcached servers to use.
*
- * @param[in] in_servers_list list of servers
+ * @param[in] server_name name of the server to add
+ * @param[in] port port number of server to add
* @return true on success; false otherwise
*/
- bool setServers(const std::string &in_servers_list)
+ bool addServer(const std::string &server_name, in_port_t port)
{
- servers_list.assign(in_servers_list);
- servers= memcached_servers_parse(in_servers_list.c_str());
- return (servers == NULL);
+ memcached_return_t rc;
+
+ rc= memcached_server_add(memc, server_name.c_str(), port);
+
+ return (rc == MEMCACHED_SUCCESS);
}
/**
- * Add a server to the list of memcached servers to use.
+ * Remove a server from the list of memcached servers to use.
*
- * @param[in] server_name name of the server to add
- * @param[in[ port port number of server to add
+ * @param[in] server_name name of the server to remove
+ * @param[in] port port number of server to remove
* @return true on success; false otherwise
*/
- bool addServer(const std::string &server_name, unsigned int port)
+ bool removeServer(const std::string &server_name, in_port_t port)
{
- memcached_return rc;
+ std::string tmp_str;
std::ostringstream strstm;
- servers_list.append(",");
- servers_list.append(server_name);
- servers_list.append(":");
+ tmp_str.append(",");
+ tmp_str.append(server_name);
+ tmp_str.append(":");
strstm << port;
- servers_list.append(strstm.str());
- servers= memcached_server_list_append(servers,
- server_name.c_str(),
- port,
- &rc);
- return (rc == MEMCACHED_SUCCESS);
+ tmp_str.append(strstm.str());
+
+ //memcached_return_t rc= memcached_server_remove(server);
+
+ return false;
}
/**
* @param[out] ret_val store returned object in this vector
* @return a memcached return structure
*/
- memcached_return fetch(std::string &key,
+ memcached_return_t fetch(std::string &key,
std::vector<char> &ret_val)
{
char ret_key[MEMCACHED_MAX_KEY];
size_t value_length= 0;
size_t key_length= 0;
- memcached_return rc;
+ memcached_return_t rc;
uint32_t flags= 0;
- char *value= memcached_fetch(&memc, ret_key, &key_length,
+ char *value= memcached_fetch(memc, ret_key, &key_length,
&value_length, &flags, &rc);
if (value && ret_val.empty())
{
ret_val.reserve(value_length);
ret_val.assign(value, value + value_length);
- key.assign(ret_key);
+ key.assign(ret_key, key_length);
+ free(value);
+ }
+ else if (value)
+ {
+ free(value);
}
+
return rc;
}
* this vector
* @return true on success; false otherwise
*/
- bool get(const std::string &key,
- std::vector<char> &ret_val)
+ bool get(const std::string &key, std::vector<char> &ret_val)
{
uint32_t flags= 0;
- memcached_return rc;
+ memcached_return_t rc;
size_t value_length= 0;
- if (key.empty())
- {
- return false;
- }
- char *value= memcached_get(&memc, key.c_str(), key.length(),
+ char *value= memcached_get(memc, key.c_str(), key.length(),
&value_length, &flags, &rc);
if (value != NULL && ret_val.empty())
{
ret_val.reserve(value_length);
ret_val.assign(value, value + value_length);
+ free(value);
return true;
}
return false;
/**
* Fetches an individual from a server which is specified by
* the master_key parameter that is used for determining which
- * server an object was stored in if key partitioning was
+ * server an object was stored in if key partitioning was
* used for storage.
*
* @param[in] master_key key that specifies server object is stored on
* this vector
* @return true on success; false otherwise
*/
- bool getByKey(const std::string &master_key,
- const std::string &key,
+ bool getByKey(const std::string &master_key,
+ const std::string &key,
std::vector<char> &ret_val)
{
uint32_t flags= 0;
- memcached_return rc;
+ memcached_return_t rc;
size_t value_length= 0;
- if (master_key.empty() || key.empty())
- {
- return false;
- }
- 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);
if (value)
{
ret_val.reserve(value_length);
ret_val.assign(value, value + value_length);
+ free(value);
return true;
}
return false;
}
/*
- * If the std::vector of keys is empty then we cannot
+ * If the std::vector of keys is empty then we cannot
* call memcached_mget as we will get undefined behavior.
*/
if (! real_keys.empty())
{
- memcached_return rc= memcached_mget(&memc, &real_keys[0], &key_len[0],
- real_keys.size());
+ memcached_return_t rc= memcached_mget(memc, &real_keys[0], &key_len[0], real_keys.size());
return (rc == MEMCACHED_SUCCESS);
}
* @param[in] flags flags to store with the object
* @return true on succcess; false otherwise
*/
- bool set(const std::string &key,
+ bool set(const std::string &key,
const std::vector<char> &value,
time_t expiration,
uint32_t flags)
{
- if (key.empty() || value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_set(&memc,
- key.c_str(), key.length(),
- &value[0], value.size(),
- expiration, flags);
+ memcached_return_t rc= memcached_set(memc,
+ key.c_str(), key.length(),
+ &value[0], value.size(),
+ expiration, flags);
return (rc == MEMCACHED_SUCCESS || rc == MEMCACHED_BUFFERED);
}
* @param[in] flags flags to store with the object
* @return true on succcess; false otherwise
*/
- bool setByKey(const std::string &master_key,
- const std::string &key,
+ bool setByKey(const std::string &master_key,
+ const std::string &key,
const std::vector<char> &value,
time_t expiration,
uint32_t flags)
{
- if (master_key.empty() ||
- key.empty() ||
- value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_set_by_key(&memc, master_key.c_str(),
- master_key.length(),
- key.c_str(), key.length(),
- &value[0], value.size(),
- expiration,
- flags);
+ memcached_return_t rc= memcached_set_by_key(memc, master_key.c_str(),
+ master_key.length(),
+ key.c_str(), key.length(),
+ &value[0], value.size(),
+ expiration,
+ flags);
return (rc == MEMCACHED_SUCCESS);
}
time_t expiration,
uint32_t flags)
{
- if (keys.size() != values.size())
- {
- return false;
- }
bool retval= true;
std::vector<std::string>::iterator key_it= keys.begin();
std::vector< std::vector<char> *>::iterator val_it= values.begin();
time_t expiration,
uint32_t flags)
{
- if (key_value_map.empty())
- {
- return false;
- }
bool retval= true;
- std::map<const std::string, std::vector<char> >::iterator it=
- key_value_map.begin();
+ std::map<const std::string, std::vector<char> >::iterator it= key_value_map.begin();
+
while (it != key_value_map.end())
{
retval= set(it->first, it->second, expiration, flags);
if (retval == false)
{
+ // We should tell the user what the key that failed was
return false;
}
++it;
*/
bool increment(const std::string &key, uint32_t offset, uint64_t *value)
{
- if (key.empty())
- {
- return false;
- }
- memcached_return rc= memcached_increment(&memc, key.c_str(), key.length(),
- offset, value);
+ memcached_return_t rc= memcached_increment(memc, key.c_str(), key.length(),
+ offset, value);
return (rc == MEMCACHED_SUCCESS);
}
*/
bool decrement(const std::string &key, uint32_t offset, uint64_t *value)
{
- if (key.empty())
- {
- return false;
- }
- memcached_return rc= memcached_decrement(&memc, key.c_str(),
- key.length(),
- offset, value);
+ memcached_return_t rc= memcached_decrement(memc, key.c_str(),
+ key.length(),
+ offset, value);
return (rc == MEMCACHED_SUCCESS);
}
*/
bool add(const std::string &key, const std::vector<char> &value)
{
- if (key.empty() || value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_add(&memc, key.c_str(), key.length(),
- &value[0], value.size(), 0, 0);
+ memcached_return_t rc= memcached_add(memc, key.c_str(), key.length(),
+ &value[0], value.size(), 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
* @param[in] value of object to add
* @return true on success; false otherwise
*/
- bool addByKey(const std::string &master_key,
- const std::string &key,
+ bool addByKey(const std::string &master_key,
+ const std::string &key,
const std::vector<char> &value)
{
- if (master_key.empty() ||
- key.empty() ||
- value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_add_by_key(&memc,
- master_key.c_str(),
- master_key.length(),
- key.c_str(),
- key.length(),
- &value[0],
- value.size(),
- 0, 0);
+ memcached_return_t rc= memcached_add_by_key(memc,
+ master_key.c_str(),
+ master_key.length(),
+ key.c_str(),
+ key.length(),
+ &value[0],
+ value.size(),
+ 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
*/
bool replace(const std::string &key, const std::vector<char> &value)
{
- if (key.empty() ||
- value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_replace(&memc, key.c_str(), key.length(),
- &value[0], value.size(),
- 0, 0);
+ memcached_return_t rc= memcached_replace(memc, key.c_str(), key.length(),
+ &value[0], value.size(),
+ 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
* @param[in[ value value to replace object with
* @return true on success; false otherwise
*/
- bool replaceByKey(const std::string &master_key,
- const std::string &key,
+ bool replaceByKey(const std::string &master_key,
+ const std::string &key,
const std::vector<char> &value)
{
- if (master_key.empty() ||
- key.empty() ||
- value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_replace_by_key(&memc,
- master_key.c_str(),
- master_key.length(),
- key.c_str(),
- key.length(),
- &value[0],
- value.size(),
- 0, 0);
+ memcached_return_t rc= memcached_replace_by_key(memc,
+ master_key.c_str(),
+ master_key.length(),
+ key.c_str(),
+ key.length(),
+ &value[0],
+ value.size(),
+ 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
*/
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);
+ memcached_return_t rc= memcached_prepend(memc, key.c_str(), key.length(),
+ &value[0], value.size(), 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
* @param[in] value data to prepend to object's value
* @return true on success; false otherwise
*/
- bool prependByKey(const std::string &master_key,
- const std::string &key,
+ bool prependByKey(const std::string &master_key,
+ const std::string &key,
const std::vector<char> &value)
{
- if (master_key.empty() ||
- key.empty() ||
- value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_prepend_by_key(&memc,
- master_key.c_str(),
- master_key.length(),
- key.c_str(),
- key.length(),
- &value[0],
- value.size(),
- 0,
- 0);
+ memcached_return_t rc= memcached_prepend_by_key(memc,
+ master_key.c_str(),
+ master_key.length(),
+ key.c_str(),
+ key.length(),
+ &value[0],
+ value.size(),
+ 0,
+ 0);
return (rc == MEMCACHED_SUCCESS);
}
*/
bool append(const std::string &key, const std::vector<char> &value)
{
- if (key.empty() || value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_append(&memc,
- key.c_str(),
- key.length(),
- &value[0],
- value.size(),
- 0, 0);
+ memcached_return_t rc= memcached_append(memc,
+ key.c_str(),
+ key.length(),
+ &value[0],
+ value.size(),
+ 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
* @param[in] value data to append to object's value
* @return true on success; false otherwise
*/
- bool appendByKey(const std::string &master_key,
- const std::string &key,
+ bool appendByKey(const std::string &master_key,
+ const std::string &key,
const std::vector<char> &value)
{
- if (master_key.empty() ||
- key.empty() ||
- value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_append_by_key(&memc,
- master_key.c_str(),
- master_key.length(),
- key.c_str(),
- key.length(),
- &value[0],
- value.size(),
- 0, 0);
+ memcached_return_t rc= memcached_append_by_key(memc,
+ master_key.c_str(),
+ master_key.length(),
+ key.c_str(),
+ key.length(),
+ &value[0],
+ value.size(),
+ 0, 0);
return (rc == MEMCACHED_SUCCESS);
}
* @param[in] value value to store for object in server
* @param[in] cas_arg "cas" value
*/
- bool cas(const std::string &key,
- const std::vector<char> &value,
+ bool cas(const std::string &key,
+ const std::vector<char> &value,
uint64_t cas_arg)
{
- if (key.empty() || value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_cas(&memc, key.c_str(), key.length(),
- &value[0], value.size(),
- 0, 0, cas_arg);
+ memcached_return_t rc= memcached_cas(memc, key.c_str(), key.length(),
+ &value[0], value.size(),
+ 0, 0, cas_arg);
return (rc == MEMCACHED_SUCCESS);
}
* @param[in] value value to store for object in server
* @param[in] cas_arg "cas" value
*/
- bool casByKey(const std::string &master_key,
- const std::string &key,
- const std::vector<char> &value,
+ bool casByKey(const std::string &master_key,
+ const std::string &key,
+ const std::vector<char> &value,
uint64_t cas_arg)
{
- if (master_key.empty() ||
- key.empty() ||
- value.empty())
- {
- return false;
- }
- memcached_return rc= memcached_cas_by_key(&memc,
- master_key.c_str(),
- master_key.length(),
- key.c_str(),
- key.length(),
- &value[0],
- value.size(),
- 0, 0, cas_arg);
+ memcached_return_t rc= memcached_cas_by_key(memc,
+ master_key.c_str(),
+ master_key.length(),
+ key.c_str(),
+ key.length(),
+ &value[0],
+ value.size(),
+ 0, 0, cas_arg);
return (rc == MEMCACHED_SUCCESS);
}
*/
bool remove(const std::string &key)
{
- if (key.empty())
- {
- return false;
- }
- memcached_return rc= memcached_delete(&memc, key.c_str(), key.length(), 0);
+ memcached_return_t rc= memcached_delete(memc, key.c_str(), key.length(), 0);
return (rc == MEMCACHED_SUCCESS);
}
* @param[in] expiration time to delete the object after
* @return true on success; false otherwise
*/
- bool remove(const std::string &key,
- time_t expiration)
+ bool remove(const std::string &key, time_t expiration)
{
- if (key.empty())
- {
- return false;
- }
- memcached_return rc= memcached_delete(&memc,
- key.c_str(),
- key.length(),
- expiration);
+ memcached_return_t rc= memcached_delete(memc,
+ key.c_str(),
+ key.length(),
+ expiration);
return (rc == MEMCACHED_SUCCESS);
}
/**
- * Delete an object from the server specified by the key given.
+ * Delete an object from the server specified by the key given.
*
* @param[in] master_key specifies server to remove object from
* @param[in] key key of object to delete
* @return true on success; false otherwise
*/
- bool removeByKey(const std::string &master_key,
+ bool removeByKey(const std::string &master_key,
const std::string &key)
{
- if (master_key.empty() || key.empty())
- {
- return false;
- }
- memcached_return rc= memcached_delete_by_key(&memc,
- master_key.c_str(),
- master_key.length(),
- key.c_str(),
- key.length(),
- 0);
+ memcached_return_t rc= memcached_delete_by_key(memc,
+ master_key.c_str(),
+ master_key.length(),
+ key.c_str(),
+ key.length(),
+ 0);
return (rc == MEMCACHED_SUCCESS);
}
/**
- * Delete an object from the server specified by the key given.
+ * Delete an object from the server specified by the key given.
*
* @param[in] master_key specifies server to remove object from
* @param[in] key key of object to delete
* @param[in] expiration time to delete the object after
* @return true on success; false otherwise
*/
- bool removeByKey(const std::string &master_key,
+ bool removeByKey(const std::string &master_key,
const std::string &key,
time_t expiration)
{
- if (master_key.empty() || key.empty())
- {
- return false;
- }
- memcached_return rc= memcached_delete_by_key(&memc,
- master_key.c_str(),
- master_key.length(),
- key.c_str(),
- key.length(),
- expiration);
+ memcached_return_t rc= memcached_delete_by_key(memc,
+ master_key.c_str(),
+ master_key.length(),
+ key.c_str(),
+ key.length(),
+ expiration);
return (rc == MEMCACHED_SUCCESS);
}
*/
bool flush(time_t expiration)
{
- memcached_return rc= memcached_flush(&memc, expiration);
- return (rc == MEMCACHED_SUCCESS);
- }
-
- /**
- * Callback function for result sets. It passes the result
- * sets to the list of functions provided.
- *
- * @param[in] callback list of callback functions
- * @param[in] context pointer to memory reference that is
- * supplied to the calling function
- * @param[in] num_of_callbacks number of callback functions
- * @return true on success; false otherwise
- */
- bool fetchExecute(memcached_execute_function *callback,
- void *context,
- unsigned int num_of_callbacks)
- {
- memcached_return rc= memcached_fetch_execute(&memc,
- callback,
- context,
- num_of_callbacks);
+ memcached_return_t rc= memcached_flush(memc, expiration);
return (rc == MEMCACHED_SUCCESS);
}
return version;
}
-private:
+ /**
+ * Retrieve memcached statistics. Populate a std::map with the retrieved
+ * stats. Each server will map to another std::map of the key:value stats.
+ *
+ * @param[out] stats_map a std::map to be populated with the memcached
+ * stats
+ * @return true on success; false otherwise
+ */
+ bool getStats(std::map< std::string, std::map<std::string, std::string> >
+ &stats_map)
+ {
+ memcached_return_t rc;
+ memcached_stat_st *stats= memcached_stat(memc, NULL, &rc);
- std::string servers_list;
- memcached_st memc;
- memcached_server_st *servers;
- memcached_result_st result;
+ if (rc != MEMCACHED_SUCCESS &&
+ rc != MEMCACHED_SOME_ERRORS)
+ {
+ return false;
+ }
+
+ uint32_t server_count= memcached_server_count(memc);
+
+ /*
+ * For each memcached server, construct a std::map for its stats and add
+ * it to the std::map of overall stats.
+ */
+ for (uint32_t x= 0; x < server_count; x++)
+ {
+ memcached_server_instance_st instance=
+ memcached_server_instance_by_position(memc, x);
+ std::ostringstream strstm;
+ std::string server_name(memcached_server_name(instance));
+ server_name.append(":");
+ strstm << memcached_server_port(instance);
+ server_name.append(strstm.str());
+
+ std::map<std::string, std::string> server_stats;
+ char **list= NULL;
+ char **ptr= NULL;
+
+ list= memcached_stat_get_keys(memc, &stats[x], &rc);
+ for (ptr= list; *ptr; ptr++)
+ {
+ char *value= memcached_stat_get_value(memc, &stats[x], *ptr, &rc);
+ server_stats[*ptr]= value;
+ free(value);
+ }
+
+ stats_map[server_name]= server_stats;
+ free(list);
+ }
+
+ memcached_stat_free(memc, stats);
+ return true;
+ }
+
+private:
+ memcached_st *memc;
};
}
-
-#endif /* LIBMEMCACHEDPP_H */
projects / awesomized / libmemcached / blobdiff