下面讲一下高级部分Compass与Hibernate，Spring的集成。Compass
内部有对Hibernate,Spring
的支持，如果配置好了，可以在建立和更新索引的时候不用Compass
写一句代码。爽吧！～不过集成它们比较麻烦那就看我一步一步的来吧：
1.首先把Hibernate和Spring集成：
来个例子吧：
先看数据库脚本(MySql)：
CREATE TABLE `article` (
`Id` int(11) NOT NULL auto_increment,
`title` varchar(40) NOT NULL default '',
`author` int(11) default '0',
`publish_date` date NOT NULL default '0000-00-00',
PRIMARY KEY (`Id`)
) TYPE=MyISAM;
CREATE TABLE `author` (
`Id` int(11) NOT NULL auto_increment,
`username` varchar(20) NOT NULL default '',
`password` varchar(20) NOT NULL default '',
`age` smallint(6) default '0',
PRIMARY KEY (`Id`)
) TYPE=MyISAM;
建立一个工程叫CompassHibernateSpring
说明一下开发环境：eclipse3.2+myeclipse5.0+springtide+middlegen(注意要在工程上加入MyEcilpse的Hibernate和Spring能力。
然后用Hibernate进行装配，Hibernate有三个配置文件：hibernate.cfg.xml, Article.hbm.xml,Author.hbm.xml
具体的结构请看：
Hibernate.cfg.xml:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//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.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.username">root</property>
<property name="connection.password">java</property>
<property name="connection.url">jdbc:mysql://localhost:3306/test</property>
<property name="show_sql">true</property>
<mapping resource="org/li/compass/shibernate/Article.hbm.xml" />
<mapping resource="org/li/compass/shibernate/Author.hbm.xml" />
</session-factory>
</hibernate-configuration>
Article.hbm.xml:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
<hibernate-mapping>
<!--
Created by the Middlegen Hibernate plugin 2.2
http://boss.bekk.no/boss/middlegen/
http://www.hibernate.org/
-->
<class
name="org.li.compass.shibernate.Article"
table="article"
lazy="false"
>
<id
name="id"
type="java.lang.Integer"
column="Id"
>
<meta attribute="field-description" inherit="false">
auto_increment
</meta>
<generator class="increment" />
</id>
<property
name="title"
type="java.lang.String"
column="title"
not-null="true"
length="40"
/>
<property
name="author"
type="java.lang.String"
column="author"
length="11"
/>
<property
name="publishDate"
type="java.util.Date"
column="publish_date"
not-null="true"
length="10"
/>
<!-- Associations -->
</class>
</hibernate-mapping>
Author.hbm.xml:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
<hibernate-mapping>
<!--
Created by the Middlegen Hibernate plugin 2.2
http://boss.bekk.no/boss/middlegen/
http://www.hibernate.org/
-->
<class
name="org.li.compass.shibernate.Author"
table="author"
lazy="false"
>
<id
name="id"
type="java.lang.Integer"
column="Id"
>
<meta attribute="field-description" inherit="false">
auto_increment
</meta>
<generator class="increment" />
</id>
<property
name="username"
type="java.lang.String"
column="username"
not-null="true"
length="20"
/>
<property
name="password"
type="java.lang.String"
column="password"
not-null="true"
length="20"
/>
<property
name="age"
type="java.lang.Short"
column="age"
length="6"
/>
<!-- Associations -->
</class>
</hibernate-mapping>
具本的POJO类看源代码吧：
由于这里是讲Compass的，有关Hibernate和Spring的内容网上很多中文资料的这里就不介绍了。
下面讲的是跟着我一步一步用Spring把Hibernate和Compass集成起来。
在applicationContext.xml中：
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref local="dataSource" />
</property>
<property name="hibernateProperties">
<props>
<prop key="dialect">
org.hibernate.dialect.MySQLDialect
</prop>
<prop key="show_sql">true</prop>
</props>
</property>
<property name="mappingDirectoryLocations">
<list>
<value>org/li/compass/shibernate</value>
</list>
</property>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost:3306/test</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>java</value>
</property>
</bean>
<bean id="hibernateTemplate"
class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<bean id="articleDAO" class="org.li.compass.shibernate.dao.ArticleDAO">
<property name="hibernateTemplate">
<ref local="hibernateTemplate"/>
</property>
</bean>
<bean id="authorDAO" class="org.li.compass.shibernate.dao.AuthorDAO">
<property name="hibernateTemplate">
<ref local="hibernateTemplate"/>
</property>
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
以上的配置是将Spring和Hibernate集成起来。
下面我们将加入Compass的配置：
由于我们只对文章进行搜索所以只对文章建立索引
Article.cpm.xml:
<!DOCTYPE compass-core-mapping PUBLIC
"-//Compass/Compass Core Mapping DTD 1.0//EN"
"http://www.opensymphony.com/compass/dtd/compass-core-mapping.dtd">
<compass-core-mapping package="org.li.compass.shibernate">
<class name="Article" alias="article">
<!-- 这是必须有的 -->
<id name="id"/>
<!-- 你可以通过这个配置来在底层给这个对象加一个Field("type","java") -->
<constant>
<meta-data>type</meta-data>
<meta-data-value>java</meta-data-value>
</constant>
<!-- 配置一下属性 -->
<property name="title">
<meta-data>titleIndex</meta-data>
</property>
<property name="publishDate">
<meta-data>publishDateIndex</meta-data>
</property>
<property name="author">
<meta-data>author</meta-data>
</property>
</class>
</compass-core-mapping>
然后回到applicationContext.xml里：
看看怎么集成的，在Compass中有个org.compass.gps.impl.SingleCompassGps是对Compass进行实时更新的，而org.compass.spring.device.hibernate.SpringHibernate3GpsDevice
它是和Hibernate集成并且对Hibernate的insert,delete,update进行自动的更新，所以说这样就不
我们为Compass写一句代码了。不过这两个类对Compass和Hibernate的实时功能也可以用Spring
的AOP来实现（这里也不讨论了）。剩下的就是用Spring的IoC来支Compass的初始化功能进行
注入：
第一个是：
<bean id="compassConfiguration"
class="org.compass.core.config.CompassConfiguration" />
第二个是：
<bean id="compass" class="org.compass.spring.LocalCompassBean">
<!-- 这里配置只用作建立索引的类 -->
<property name="classMappings">
<list>
<value>org.li.compass.shibernate.Article</value>
</list>
</property>
<property name="resourceDirectoryLocations">
<list>
<value>org/li/compass/shibernate</value>
</list>
</property>
<property name="compassConfiguration"
ref="compassConfiguration" />
<property name="compassSettings">
<props>
<prop key="compass.engine.connection">target/test</prop>
<prop key="compass.transaction.factory">
org.compass.spring.transaction.SpringSyncTransactionFactory
</prop>
</props>
</property>
<property name="transactionManager" ref="transactionManager" />
</bean>
在上面配置只用作建立索引的类就可以
还有与Hibernate和Spring集成差不多。有个CompassTemplate的DAO模板也要注入
<bean id="compassTemplate" class="org.compass.core.CompassTemplate">
<property name="compass">
<ref local="compass"/>
</property>
</bean>
还有关键的两个类的注入：
<bean id="hibernateGpsDevice"
class="org.compass.spring.device.hibernate.SpringHibernate3GpsDevice">
<property name="name">
<value>hibernateDevice</value>
</property>
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="compassGps" class="org.compass.gps.impl.SingleCompassGps"
init-method="start" destroy-method="stop">
<property name="compass" ref="compass" />
<property name="gpsDevices">
<list>
<ref local="hibernateGpsDevice" />
</list>
</property>
</bean>
最后呢就是要在articleDAO上注入CompassTemplate因为我们要搜索的时候用到CompassTemplate了（CompassTemplate是支持事务的）
<property name="compassImplements">
<ref local="compassImplements"/>
</property>
这样配置就ok了
下面测试一下吧：
新建JUnit测试用例：
publicclass TestCompass extends TestCase
{
private ClassPathXmlApplicationContext context = null;
protectedvoid setUp() throws Exception
{
context = new ClassPathXmlApplicationContext("applicationContext.xml");
}
protectedvoid tearDown() throws Exception
{
}
publicvoid insertTest()
{
ArticleDAO articleDao = (ArticleDAO) context.getBean("articleDAO");
AuthorDAO authorDao = (AuthorDAO) context.getBean("authorDAO");
Article article = new Article();
Author author = new Author();
author.setAge((short)21);
author.setUsername("javafish");
author.setPassword("java");
article.setTitle("Compass学习文档");
article.setPublishDate(new Date());
article.setAuthor("javafish");
authorDao.save(author);
articleDao.save(article);
}
publicvoid find()
{
ArticleDAO articleDao = (ArticleDAO) context.getBean("articleDAO");
Article article = articleDao.find("文档");
System.out.println(article.getPublishDate());
}
}
看到没有在insertTest()里根本看不出用Compass来全是Hibernate和Spring的代码。
在对像article和author被写入数据库的同时，article也被写入索引了。
看到了Compass与Hibernate,Spring集成的威力了吧。
我们可以用Lucene测试一下。
publicvoid lucene() throws IOException, ParseException
{
IndexSearcher indexSearcher = new IndexSearcher("D:""workspace""CompassSpringHibernate""target""test""index""article");
QueryParser queryParser = new QueryParser("titleIndex",new StandardAnalyzer());
Query query = queryParser.parse("学习");
Hits hits = indexSearcher.search(query);
Document doc = null;
for(int i=0;i<hits.length();i++)
{
doc=hits.doc(i);
System.out.println(doc.get("titleIndex"));
System.out.println(doc.get("publishDateIndex"));
}
}
会发现结果搜索成功了～～
而我们查询的时候就可以在DAO类里封装CompassQuery的操作。
其它具体还是看帮助文档吧。^_^
posted on 2007-12-18 11:07
方涛升 阅读(938)
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