Hibernate中使用memcached

Hibernate-memcached是CacheProvider接口的memcached实现

http://code.google.com/p/hibernate-memcached/

步骤：

one：下载和安装运行memcache服务器程序即：memcache.exe 下载到c：\

two:增加Hibernate-memcached的相关类库

包括：memcached-2.1.jar http://spymemcached.googlecode.com/files/memcached-2.1.jar

　　　spy-2.4.jar http://bleu.west.spy.net/~dusin/repo/spy/jars/spy-2.4.jar

　　　commons-codec-1.3.jar http://repol.maven.org/maven2/commons-doces/commons-dodec/1.3/commons-dodec-1.3.jar

three:修改hibernate.cfg.xml文件

four：测试Hibernate-memcached

Hibernate.java

代码：

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory>
<property name="dialect">
  org.hibernate.dialect.MySQLDialect
</property>
<property name="connection.url">
  jdbc:mysql://localhost:3307/users
</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property>
<property name="connection.driver_class">
  com.mysql.jdbc.Driver
</property>
<property name="myeclipse.connection.profile">mysqlusers</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="current_session_context_class">thread</property>
<property name="cache.provider_class">
  com.googlecode.hibernate.memcached.MemcachedCacheProvider
</property>
<property name="ibernate.cache.use_query_cache">true</property>
<mapping resource="com/b510/examplex/Category.hbm.xml" />
<mapping resource="com/b510/examplex/Product.hbm.xml" />

</session-factory>

</hibernate-configuration>

HibernateTest.java

代码：

/**
*
*/
package com.b510.examplex;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;

/**
*
* @author XHW
*
* @date 2011-7-17
*
*/
public class HibernateTest {
public static void main(String[] args) {
  new HibernateTest().test();
}
public void test(){
  Session session=HibernateSessionFactoryUtil.getSessionFactory().openSession();
  session.beginTransaction();
  Query query=session.createQuery("from Product");
  //查询
  query.setCacheable(true);
  List<Product> list=query.list();
  for(Product p:list){
   System.out.println(p.getName());
  }
  Query query2=session.createQuery("from Product");
  List<Product> list2=query.list();
  for(Product p2:list2){
   System.out.println(p2.getName());
  }
  session.getTransaction().commit();
}
}

运行结果：

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
31 [main] INFO com.googlecode.hibernate.memcached.MemcachedCacheProvider - Starting MemcachedClient...
2011-07-17 22:15:34.015 INFO net.spy.memcached.MemcachedConnection: Added {QA sa=localhost/127.0.0.1:11211, #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0} to connect queue
2011-07-17 22:15:34.031 INFO net.spy.memcached.MemcachedConnection: Connection state changed for sun.nio.ch.SelectionKeyImpl@17200b4
140 [main] INFO com.googlecode.hibernate.memcached.MemcachedCacheProvider - Building cache for region [com.b510.examplex.Category]
265 [main] INFO com.googlecode.hibernate.memcached.MemcachedCacheProvider - Building cache for region [com.b510.examplex.Category.products]
Hibernate:
    select
        product0_.id as id1_,
        product0_.category_id as category2_1_,
        product0_.name as name1_,
        product0_.price as price1_,
        product0_.descripton as descripton1_
    from
        users.product product0_
java SE应用程序设计
java WEB开发与实战
Hibernate:
    select
        product0_.id as id1_,
        product0_.category_id as category2_1_,
        product0_.name as name1_,
        product0_.price as price1_,
        product0_.descripton as descripton1_
    from
        users.product product0_
java SE应用程序设计
java WEB开发与实战

注意：下面这步应该最先

运行-->cmd-->cd\ 回车-->memcached -vv

显示结果：

C:\Documents and Settings\Administrator>ed\
'ed\' 不是内部或外部命令，也不是可运行的程序
或批处理文件。

C:\Documents and Settings\Administrator>cd\

C:\>memcached -vv
slab class   1: chunk size     80 perslab 13107
slab class   2: chunk size    100 perslab 10485
slab class   3: chunk size    128 perslab 8192
slab class   4: chunk size    160 perslab 6553
slab class   5: chunk size    200 perslab 5242
slab class   6: chunk size    252 perslab 4161
slab class   7: chunk size    316 perslab 3318
slab class   8: chunk size    396 perslab 2647
slab class   9: chunk size    496 perslab 2114
slab class 10: chunk size    620 perslab 1691
slab class 11: chunk size    776 perslab 1351
slab class 12: chunk size    972 perslab 1078
slab class 13: chunk size   1216 perslab   862
slab class 14: chunk size   1520 perslab   689
slab class 15: chunk size   1900 perslab   551
slab class 16: chunk size   2376 perslab   441
slab class 17: chunk size   2972 perslab   352
slab class 18: chunk size   3716 perslab   282
slab class 19: chunk size   4648 perslab   225
slab class 20: chunk size   5812 perslab   180
slab class 21: chunk size   7268 perslab   144
slab class 22: chunk size   9088 perslab   115
slab class 23: chunk size 11360 perslab    92
slab class 24: chunk size 14200 perslab    73
slab class 25: chunk size 17752 perslab    59
slab class 26: chunk size 22192 perslab    47
slab class 27: chunk size 27740 perslab    37
slab class 28: chunk size 34676 perslab    30
slab class 29: chunk size 43348 perslab    24
slab class 30: chunk size 54188 perslab    19
slab class 31: chunk size 67736 perslab    15
slab class 32: chunk size 84672 perslab    12
slab class 33: chunk size 105840 perslab     9
slab class 34: chunk size 132300 perslab     7
slab class 35: chunk size 165376 perslab     6
slab class 36: chunk size 206720 perslab     5
slab class 37: chunk size 258400 perslab     4
slab class 38: chunk size 323000 perslab     3
slab class 39: chunk size 403752 perslab     2
slab class 40: chunk size 504692 perslab     2
<1944 server listening
<1928 new client connection
<1920 new client connection
<1908 new client connection
<1896 new client connection