/
pool.go
187 lines (154 loc) · 4.35 KB
/
pool.go
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package gomc
/*
#cgo LDFLAGS: -L/usr/lib -lmemcached -lmemcachedutil
#include <libmemcached/memcached.h>
#include <libmemcached/util.h>
#include <stdlib.h>
#include <stdint.h>
*/
import "C"
import (
"errors"
"time"
"unsafe"
)
type memcachedPool struct {
pool *C.memcached_pool_st
encoding EncodingType
}
func newPool(servers []string, initSize, maxSize int, encoding EncodingType) (self *memcachedPool, err error) {
config := poolConfig(servers, initSize, maxSize)
cs_config := C.CString(config)
defer C.free(unsafe.Pointer(cs_config))
self = new(memcachedPool)
self.pool = C.memcached_pool(cs_config, C.size_t(len(config)))
if self.pool == nil {
err = self.checkError(
C.libmemcached_check_configuration(
cs_config, C.size_t(len(config)), nil, 0))
return
}
self.encoding = encoding
return
}
func (self *memcachedPool) checkError(returnCode C.memcached_return_t) error {
if C.memcached_failed(returnCode) {
return errors.New(C.GoString(C.memcached_strerror(nil, returnCode)))
}
return nil
}
func (self *memcachedPool) SetBehavior(behavior BehaviorType, value uint64) error {
return self.checkError(
C.memcached_pool_behavior_set(
self.pool, C.memcached_behavior_t(behavior), C.uint64_t(value)))
}
func (self *memcachedPool) GetBehavior(behavior BehaviorType) (value uint64, err error) {
err = self.checkError(
C.memcached_pool_behavior_get(
self.pool, C.memcached_behavior_t(behavior), (*C.uint64_t)(&value)))
return
}
func (self *memcachedPool) fetchConnection() (conn *memcached, err error) {
ret := new(C.memcached_return_t)
conn = &memcached{
mc: C.memcached_pool_fetch(self.pool, nil, ret),
encoding: self.encoding,
}
err = self.checkError(*ret)
return
}
func (self *memcachedPool) releaseConnection(conn *memcached) error {
return self.checkError(C.memcached_pool_release(self.pool, conn.mc))
}
func (self *memcachedPool) GenerateHash(key string) (hash uint32, err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
hash, err = conn.GenerateHash(key)
return
}
func (self *memcachedPool) Increment(key string, offset uint32) (value uint64, err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.Increment(key, offset)
}
func (self *memcachedPool) Decrement(key string, offset uint32) (value uint64, err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.Decrement(key, offset)
}
func (self *memcachedPool) Delete(key string, expiration time.Duration) (err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.Delete(key, expiration)
}
func (self *memcachedPool) Exist(key string) (err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.Exist(key)
}
func (self *memcachedPool) Flush(expiration time.Duration) (err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.Flush(expiration)
}
func (self *memcachedPool) Get(key string, value interface{}) (err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.Get(key, value)
}
func (self *memcachedPool) GetMulti(keys []string) (res Result, err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.GetMulti(keys)
}
func (self *memcachedPool) Add(key string, value interface{}, expiration time.Duration) (err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.Add(key, value, expiration)
}
func (self *memcachedPool) Replace(key string, value interface{}, expiration time.Duration) (err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.Replace(key, value, expiration)
}
func (self *memcachedPool) Set(key string, value interface{}, expiration time.Duration) (err error) {
conn, err := self.fetchConnection()
defer self.releaseConnection(conn)
if err != nil {
return
}
return conn.Set(key, value, expiration)
}
func (self *memcachedPool) Close() {
C.memcached_pool_destroy(self.pool)
}