浏览 1854 次
|
锁定老帖子 主题：hibernate 缓存 初试
精华帖 (0) :: 良好帖 (0) :: 新手帖 (0) :: 隐藏帖 (0)
|
|
|---|---|
| 作者 | 正文 |
|
发表时间：2009-11-02
最后修改：2010-01-20
配置二级缓存 hibernate.cfg.xml <?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="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
<property name="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="hibernate.connection.driver_class">net.sourceforge.jtds.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:jtds:sqlserver://localHost:1433/DSO</property>
<property name="hibernate.connection.username">sa</property>
<property name="hibernate.connection.password">sa</property>
<property name="show_sql">false</property>
<mapping resource="ComPermission.hbm.xml" />
</session-factory>
</hibernate-configuration>
ehcache.xml <ehcache>
<diskStore path="java.io.tmpdir" />
<defaultCache
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="1200"
timeToLiveSeconds="1200"
overflowToDisk="true"
/>
</ehcache>
ComPermission.hbm.xml <?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-mapping> <class name="ComPermission" table="JB_COM_PERMISSION" dynamic-insert="true" dynamic-update="true"> <cache usage="read-write" include="all" /> <id name="permissionId" type="java.lang.String"> <column name="PERMISSION_ID" length="5" /> <generator class="assigned"></generator> </id> <property name="permissionCode" type="java.lang.String"> <column name="PERMISSION_CODE" length="5" not-null="true" /> </property> <property name="permissionName" type="java.lang.String"> <column name="PERMISSION_NAME" length="30" not-null="true" /> </property> <property name="remark" type="java.lang.String"> <column name="REMARK" length="255" /> </property> </class> </hibernate-mapping> Java实体类 ComPermission public class ComPermission implements java.io.Serializable {
// Fields
private String permissionId;
private String permissionCode;
private String permissionName;
private String remark;
}
log4j设置 log4j.category.org.hibernate.cache=DEBUG,CA log4j.category.org.hibernate.SQL=DEBUG,CA
测试代码 public static void main(String[] args) {
System.out.println(HibernateSessionFactory.getConfiguration());
System.out.println("|||||||||||||||||||||||||||||||||||||||||||");
Session session = HibernateSessionFactory.getSessionFactory().openSession();
long start = System.currentTimeMillis();
try {
ComPermission permission = (ComPermission) session.load(ComPermission.class, "10001");
System.out.println(permission.getPermissionName());
} catch (RuntimeException re) {
throw re;
} finally {
session.close();
}
System.out.println("time :" + (System.currentTimeMillis() - start));
System.out.println("-----------------------------------------------");
Transaction tran = null;
Session session2 = HibernateSessionFactory.getSessionFactory().openSession();
start = System.currentTimeMillis();
try {
tran = session2.beginTransaction();
ComPermission permission = (ComPermission) session2.load(ComPermission.class, "10001");
permission.setPermissionName(permission.getPermissionName() + "!");
System.out.println(permission.getPermissionName());
session2.update(permission);
tran.commit();
} catch (RuntimeException re) {
tran.rollback();
throw re;
} finally {
session2.close();
}
System.out.println("time :" + (System.currentTimeMillis() - start));
System.out.println("---------------------------------------------------------");
Session session3 = HibernateSessionFactory.getSessionFactory().openSession();
start = System.currentTimeMillis();
try {
ComPermission permission = (ComPermission) session3.load(ComPermission.class, "10001");
System.out.println(permission.getPermissionName());
} catch (RuntimeException re) {
throw re;
} finally {
session3.close();
}
System.out.println("time :" + (System.currentTimeMillis() - start));
System.out.println("---------------------------------------------------------");
Session session4 = HibernateSessionFactory.getSessionFactory().openSession();
start = System.currentTimeMillis();
try {
ComPermission permission = (ComPermission) session4.load(ComPermission.class, "10001");
System.out.println(permission.getPermissionName());
} catch (RuntimeException re) {
throw re;
} finally {
session4.close();
}
System.out.println("time :" + (System.currentTimeMillis() - start));
}
log信息 DEBUG [org.hibernate.cache.CacheFactory.createCache:39] instantiating cache region: ComPermission usage strategy: read-write WARN [org.hibernate.cache.EhCacheProvider.buildCache:103] Could not find configuration [ComPermission]; using defaults. DEBUG [org.hibernate.cache.EhCacheProvider.buildCache:106] started EHCache region: ComPermission org.hibernate.cfg.Configuration@c4fe76 ||||||||||||||||||||||||||||||||||||||||||| DEBUG [org.hibernate.cache.ReadWriteCache.get:75] Cache lookup: ComPermission#10001 //尝试在缓存中查找对象 ComPermission#10001 DEBUG [org.hibernate.cache.EhCache.get:104] key: ComPermission#10001 DEBUG [org.hibernate.cache.EhCache.get:113] Element for ComPermission#10001 is null DEBUG [org.hibernate.cache.ReadWriteCache.get:91] Cache miss: ComPermission#10001 //找不到 DEBUG [org.hibernate.jdbc.AbstractBatcher.log:346] select compermiss0_.PERMISSION_ID as PERMISSION1_0_0_, compermiss0_.PERMISSION_CODE as PERMISSION2_0_0_, compermiss0_.PERMISSION_NAME as PERMISSION3_0_0_, compermiss0_.REMARK as REMARK0_0_ from JB_COM_PERMISSION compermiss0_ where compermiss0_.PERMISSION_ID=? DEBUG [org.hibernate.cache.ReadWriteCache.put:148] Caching: ComPermission#10001 DEBUG [org.hibernate.cache.EhCache.get:104] key: ComPermission#10001 DEBUG [org.hibernate.cache.EhCache.get:113] Element for ComPermission#10001 is null DEBUG [org.hibernate.cache.ReadWriteCache.put:160] Cached: ComPermission#10001 //将查询到的缓存起来 测试信息 time :47 ----------------------------------------------- DEBUG [org.hibernate.cache.ReadWriteCache.get:75] Cache lookup: ComPermission#10001 DEBUG [org.hibernate.cache.EhCache.get:104] key: ComPermission#10001 DEBUG [org.hibernate.cache.ReadWriteCache.get:85] Cache hit: ComPermission#10001 //找到了 测试信息! DEBUG [org.hibernate.cache.ReadWriteCache.lock:113] Invalidating: ComPermission#10001 DEBUG [org.hibernate.cache.EhCache.get:104] key: ComPermission#10001 DEBUG [org.hibernate.jdbc.AbstractBatcher.log:346] update JB_COM_PERMISSION set PERMISSION_NAME=? where PERMISSION_ID=? DEBUG [org.hibernate.cache.ReadWriteCache.release:195] Releasing: ComPermission#10001 //由于对象被更新 将缓存中的对象释放 DEBUG [org.hibernate.cache.EhCache.get:104] key: ComPermission#10001 time :31 --------------------------------------------------------- DEBUG [org.hibernate.cache.ReadWriteCache.get:75] Cache lookup: ComPermission#10001 DEBUG [org.hibernate.cache.EhCache.get:104] key: ComPermission#10001 DEBUG [org.hibernate.cache.ReadWriteCache.get:94] Cached item was locked: ComPermission#10001 //lockable.isGettable(txTimestamp)==false DEBUG [org.hibernate.jdbc.AbstractBatcher.log:346] select compermiss0_.PERMISSION_ID as PERMISSION1_0_0_, compermiss0_.PERMISSION_CODE as PERMISSION2_0_0_, compermiss0_.PERMISSION_NAME as PERMISSION3_0_0_, compermiss0_.REMARK as REMARK0_0_ from JB_COM_PERMISSION compermiss0_ where compermiss0_.PERMISSION_ID=? DEBUG [org.hibernate.cache.ReadWriteCache.put:148] Caching: ComPermission#10001 DEBUG [org.hibernate.cache.EhCache.get:104] key: ComPermission#10001 DEBUG [org.hibernate.cache.ReadWriteCache.put:160] Cached: ComPermission#10001 //重新缓存对象 测试信息! time :0 --------------------------------------------------------- DEBUG [org.hibernate.cache.ReadWriteCache.get:75] Cache lookup: ComPermission#10001 DEBUG [org.hibernate.cache.EhCache.get:104] key: ComPermission#10001 DEBUG [org.hibernate.cache.ReadWriteCache.get:85] Cache hit: ComPermission#10001 //缓存命中 测试信息! time :0
声明：ITeye文章版权属于作者，受法律保护。没有作者书面许可不得转载。
推荐链接
|
| 返回顶楼 | |
