Configuring Hibernate's Level Two cache

1. Add a level two cache configuration to the Applicationcontex.xml file:

  <!--configuring Hibernate sessionfactory--<BeanId="Sessionfactory"class="Org.springframework.orm.hibernate3.LocalSessionFactoryBean"><PropertyName="DataSource"><Refbean="DataSource"/></Property><PropertyName="Mappingresources"><List><Value>com/persia/model/person.hbm.xml</Value></List></Property><PropertyName="Hibernateproperties"> <value> Hibernate.dialect=org.hibernate.dialect.mysql5dialect hibernate.hbm2ddl.auto=update hibernate.show_sql= False Hibernate.format_sql=false hibernate.cache.use_second_level_cache=true // Use level two cache  hibernate.cache.use_query_cache=false //do not use query caching because the hit ratio is not high  Hibernate.cache.provider_class=org.hibernate.cache.ehcacheprovider //use Ehcache  </value > </property</bean> 

2. Add the ehcache.xml cache configuration file:

<?xml version= "1.0" encoding= "UTF-8"?><!--defaultcache node is the default cache policy maxelementsinmemory the maximum allowable number of objects in memory eternal sets whether objects in the cache will never expire Overflowtodisk To store an overflow object on a hard disk timetoidleseconds specifies how long the cache object is idle, the expired object is erased timetoliveseconds the total lifetime of the specified cache object Diskpersistent when the JVM ends Is whether to persist the object diskexpirythreadintervalseconds specifies the polling time of the listener thread dedicated to purging expired objects--<Ehcache><DiskstorePath="D:\cache"/><Defaultcachemaxelementsinmemory="1000"Eternal="False"overflowtodisk="True"timetoidleseconds="120"timetoliveseconds="180"Diskpersistent="False"diskexpirythreadintervalseconds="60"/><cache name="Com.persia.model.Person" maxelementsinmemory=" eternal=" "false" overflowtodisk="true" timetoidleseconds="timetoliveseconds=" 600 " diskpersistent="false"/></ehcache>        

3. Add cache settings to the entity Bean's mapping file:

<?xml version= "1.0" encoding= "UTF-8"?><! DOCTYPE hibernate-mapping Public "-//hibernate/hibernate mapping DTD 3.0//en" "Http://hibernate.sourceforge. Net/hibernate-mapping-3.0.dtd "><hibernate-MappingPackage="Com.persia.model"><ClassName="Person"table="Person"><CacheUsage="Read-write"region="Com.persia.model.Person"/><IdName="id"><generator class= " Native "/> </id< Span style= "color: #0000ff;" >> <property  "name" length= " "not-null=/> </class> </hibernate-mapping >             

4. Test whether the cache is used

Gets from the database for the first time, then caches, closes the database, makes a second fetch, and sees if it can get it.

@Testvoid Testgetperson () {System.out.println (Ps.getperson (7). GetName ());  try {System.out.println ("catch (interruptedexception e) {//TODO auto-generated catch Blocke.printstacktrace () ;} System.out.println (" get from cache:" +ps.getperson (7). GetName ());}    

Results:

Wisdom Podcast 4
Please close the database within 15 seconds
Get from Cache: Wisdom Podcast 4

To view the cache files for a disk:

Category: Spring