前面已发布了linux memcache的安装,这写了一个小例子,这在不再详细介绍。
安装说明:
http://sunney2010.javaeye.com/blog/656905
Memcached 是一个高性能的分布式内存对象缓存系统,用于动态Web应用以减轻数据库负载。它通过在内存中缓存数据和对象来减少读取数据库的次数,从而提供动态、数据 库驱动网站的速度。Memcached基于一个存储键/值对的hashmap。其守护进程(daemon )是用C写的,但是客户端可以用任何语言来编写,并通过memcached协议与守护进程通信。但是它并不提供冗余(例如,复制其hashmap条目); 当某个服务器S停止运行或崩溃了,所有存放在S上的键/值对都将丢失。
Memcached由Danga Interactive开发,用于提升LiveJournal.com访问速度的。LJ每秒动态页面访问量几千次,用户700万。Memcached将数 据库负载大幅度降低,更好的分配资源,更快速访问。
1
package
com.ctoall.core;
2
3
import
java.io.Serializable;
4
5
public
class
StudentDO
implements
Serializable {
6
7
/**
8
*
9
*/
10
private
static
final
long
serialVersionUID
=
3312721104787630488L
;
11
private
int
Id;
12
private
String Name;
13
private
int
age;
14
private
String address;
15
public
int
getId() {
16
return
Id;
17
}
18
public
void
setId(
int
id) {
19
Id
=
id;
20
}
21
public
String getName() {
22
return
Name;
23
}
24
public
void
setName(String name) {
25
Name
=
name;
26
}
27
public
int
getAge() {
28
return
age;
29
}
30
public
void
setAge(
int
age) {
31
this
.age
=
age;
32
}
33
public
String getAddress() {
34
return
address;
35
}
36
public
void
setAddress(String address) {
37
this
.address
=
address;
38
}
39
40
}
1 package com.ctoall.core;
2
3
import
java.util.Date;
4
5
import
com.danga.MemCached.MemCachedClient;
6
import
com.danga.MemCached.SockIOPool;
7
8
9
public
class
MemCached {
10
//
创建全局的唯一实例
11
protected
static
MemCachedClient mcc
=
new
MemCachedClient();
12
13
protected
static
MemCached memCached
=
new
MemCached();
14
//
设置与缓存服务器的连接池
15
static
{
16
//
服务器列表和其权重
17
String[] servers
=
{
“
192.168.186.128:11211
“
};
18
Integer[] weights
=
{
3
};
19
20
//
获取socke连接池的实例对象
21
SockIOPool pool
=
SockIOPool.getInstance();
22
23
//
设置服务器信息
24
pool.setServers( servers );
25
pool.setWeights( weights );
26
27
//
设置初始连接数、最小和最大连接数以及最大处理时间
28
pool.setInitConn(
5
);
29
pool.setMinConn(
5
);
30
pool.setMaxConn(
250
);
31
pool.setMaxIdle(
1000
*
60
*
60
*
6
);
32
33
//
设置主线程的睡眠时间
34
pool.setMaintSleep(
30
);
35
36
//
设置TCP的参数,连接超时等
37
pool.setNagle(
false
);
38
pool.setSocketTO(
3000
);
39
pool.setSocketConnectTO(
0
);
40
41
//
初始化连接池
42
pool.initialize();
43
44
//
压缩设置,超过指定大小(单位为K)的数据都会被压缩
45
mcc.setCompressEnable(
true
);
46
mcc.setCompressThreshold(
64
*
1024
);
47
}
48
/**
49
* 保护型构造方法,不允许实例化!
50
*
51
*/
52
protected
MemCached()
53
{
54
55
}
56
57
/**
58
* 获取唯一实例.
59
*
@return
60
*/
61
public
static
MemCached getInstance()
62
{
63
return
memCached;
64
}
65
66
/**
67
* 添加一个指定的值到缓存中.
68
*
@param
key
69
*
@param
value
70
*
@return
71
*/
72
public
boolean
add(String key, Object value)
73
{
74
return
mcc.add(key, value);
75
}
76
77
public
boolean
add(String key, Object value, Date expiry)
78
{
79
return
mcc.add(key, value, expiry);
80
}
81
82
public
boolean
replace(String key, Object value)
83
{
84
return
mcc.replace(key, value);
85
}
86
87
public
boolean
replace(String key, Object value, Date expiry)
88
{
89
return
mcc.replace(key, value, expiry);
90
}
91
92
/**
93
* 根据指定的关键字获取对象.
94
*
@param
key
95
*
@return
96
*/
97
public
Object get(String key)
98
{
99
return
mcc.get(key);
100
}
101
102
public
static
void
main(String[] args)
103
{
104
MemCached cache
=
MemCached.getInstance();
105
StudentDO stuDO
=
new
StudentDO();
106
stuDO.setId(
10
);
107
stuDO.setAge(
28
);
108
stuDO.setName(
“
sunney
“
);
109
stuDO.setAddress(
“
广东省深圳市福田区梅华路105号多丽科技楼9楼
“
);
110
cache.add(
“
stu
“
, stuDO);
111
StudentDO stuDO1
=
(StudentDO)cache.get(
“
stu
“
);
112
System.out.println(
“
id:
“
+
stuDO1.getId());
113
System.out.println(
“
name:
“
+
stuDO1.getName());
114
System.out.println(
“
age:
“
+
stuDO1.getAge());
115
System.out.println(
“
adress:
“
+
stuDO1.getAddress());
116
System.out.println(
“
+++++++++++++++++++++++ok++++++++++++++++++++++++
“
);
117
118
}
119
}
memcached demo下载地址:http://sunney2010.javaeye.com/admin/blogs/695106