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Compass 入门指南

SpringHibernateBean搜索引擎MVC 
阅读更多

    在新架构中打算选择Compass或Hibernate Search作为搜索引擎框架，比较后，感觉Hibernate Search上还是没有Compass成熟，另外考虑到后期对网页的爬取及搜索需求，决定还是基于Compass来作为架构缺省的搜索引擎。网上关于 Compass的文档很多，但说得相对完整其详细的入门文档基本上没有，Compass的官方文档倒是说得很详细，但是例子一塌糊涂，存在很大问题。记录 一下搭建的过程，作为入门的指南。

    Compass 通过OSEM(Object/Search Engine Mapping)允许把应用对象的领域模型映射到搜索引擎，最终通过访问common meta data来达到访问对象的目的。

1、几个核心概念

1.1、annotation vs. xml配置文件

   Compass的配置文件主要分成三类：

    第一类：*.cmd.xml文件*

      .cmd.xml文件是对common meta data进行定义，定义了最终搜索的结果中的最基本的元数据。

    第二类：*.cpm.xml文件

      *.cpm.xml是Object/Search Engine Mapping,提供了POJO到common meta data的映射。

    第三类：*.cfg.xml文件

      Compass的*.cfg.xml定义了Compass的Index存放路径、搜索引擎分词等相关信息。

    与采用xml配置文件相比较，采用Annonation方式还是相对简单，尤其是采用Spring时候，不用写*.cmd.xml文 件、*.cpm.xml、*.cfg.xml，相对很方便，而且不像Hibernate的Annonation很多，Compass的 Annonation的核心标注只有@Searchable、@SearchableId、@SearchableProperty、 @SearchableComponent个，很容易记忆。因此推荐使用Annonation方式

１.2、Compass核心API

Compass的核心API借鉴了Hibernate的术语，因此在操作上基本上与Hibernate类似，以下为Compass的几个核心接口：

    CompassConfiguration(类似Hibernate Configuration)：用来在一些设置参数、配置文件和映射定义上配置Compass。通常用来创建Compass接口。
    Compass(类似Hibernate SessionFactory)：为单线程使用，创建线程安全的实例来打开Compass Seesion。同样还提供了一些搜索引擎索引级别的操作。
    CompassSesssion(类似Hibernate Session)：用来执行像保存、删除、查找、装载这样的搜索操作。很轻量但是并不是线程安全的。
    CompassTransaction(类似Hibernate Transaction)：管理Compass事务的接口。使用它并不需要事务管理环境（像Spring、JTA）。

1.3、Compass与Spring集成

Compass已经对对spring集成做了很好的封装，同时与Spring对Hibernate的支持类似，Compass也提供了 CompassTemplate来简化诸如对Session、Transaction、Exception等操作，尽量充分使用此工具，可以有效提高效 率。例如：

CompassTemplate ct = (CompassTemplate) context.getBean(“compassTemplate”);

Article article = new Article();
article.setTitle(“Compass Test”);
article.setPublishDate(new Date());
article.setAuthor(1);

ct.save(article); //存储对象需要索引的数据到Compass的索引中。

 

2、软件环境

Spring ：2.5

Compas：1.2.1

Hibernate：3.2.5

Mysql ：5.0.5

3、数据库脚本

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;

4、测试用例

从测试用例讲起比较容易把关系理清楚，不然一堆术语和概念很让人晕乎。

import org.apache.log4j.Logger;
import java.util.Date;

import junit.framework.TestCase;

import org.compass.core.Compass;
import org.compass.core.CompassDetachedHits;
import org.compass.core.CompassHit;
import org.compass.core.CompassHits;
import org.compass.core.CompassSession;
import org.compass.core.CompassTemplate;
import org.compass.core.CompassTransaction;
import org.compass.core.support.search.CompassSearchCommand;
import org.compass.core.support.search.CompassSearchResults;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.mobilesoft.esales.dao.hibernate.ArticleDAO;
import com.mobilesoft.esales.dao.hibernate.AuthorDAO;
import com.mobilesoft.esales.model.Article;
import com.mobilesoft.esales.model.Author;
import com.mobilesoft.framework.search.service.CompassSearchService;

/**

 * Compass服务使用的测试用例

 * 

 * @author liangchuan@mobile-soft.cn

 * 

 */


public
 class
 TestCompass extends TestCase {

    private
 static
 final Logger logger = Logger.getLogger(TestCompass.class
);

    private
 static
 ClassPathXmlApplicationContext context = null
;
    private
 static
 CompassTemplate ct;

    static
 {
        context = new
 ClassPathXmlApplicationContext(new
 String[] {
                "applicationContext.xml"
, "applicationContext-resources.xml"
,
                "applicationContext-dao.xml"
, "applicationContext-service.xml"
,
                "applicationContext-compass.xml"
 });
        ct = (CompassTemplate) context.getBean("compassTemplate"
);
    }

    protected
 void
 setUp() throws Exception {

    }

    /**

     * 插入测试数据

     */

    public
 void
 testInsert() {

        ArticleDAO articleDao = (ArticleDAO) context.getBean("articleDAO"
);
        AuthorDAO authorDao = (AuthorDAO) context.getBean("authorDAO"
);
        Article article = new
 Article();
        Author author = new
 Author();
        author.setAge((short
) 27);
        author.setUsername("liangchuan"
);
        author.setPassword("liangchuan"
);
        article.setTitle("Compass Test"
);
        article.setPublishDate(new
 Date());
        article.setAuthor(1);
        authorDao.save(author);
        articleDao.save(article);
        ct.save(article);
        ct.save(author);
    }

    /**

     * 用于测试使用CompassTransaction事务方式

     */

    public
 void
 testTransactionalFind() {

        Compass compass = ct.getCompass();
        CompassSession session = compass.openSession();
        CompassTransaction tx = null
;
        try
 {
            tx = session.beginTransaction();
            CompassHits hits = session.find("Compass*"
);

            logger.error("testTransactionalFind() - CompassHits hits="

                    + hits.getLength());
            for
 (int
 i = 0; i < hits.getLength(); i++) {
                Object hit = hits.data(i);
                if
 (hit instanceof Article) {
                    Article item = (Article) hit;
                    logger.error("testTransactionalFind() - article     hits="

                            + item.getTitle());
                } else
 if
 (hit instanceof Author) {
                    Author item = (Author) hit;
                    logger.error("testTransactionalFind() - author hits="

                            + item.getUsername());
                } else
 {
                    logger.error("testTransactionalFind() - error hits="
);
                }
            }
            tx.commit();
        } catch
 (Exception e) {
            if
 (tx != null
) {
                tx.rollback();
            }
        } finally
 {
            session.close();
        }
    }

    /**

     * 用于演示CompassDetachedHits的使用。

     * 由于CompassTempalte得到的结果集必须在transactionalcontext中才能使用，

     * 因此必须使用CompassDetachedHits方式测试CompassDetachedHits方式

     */

    public
 void
 testDetachedFind() {

        // 由于CompassTempalte得到的结果集必须在transactional

        // context中才能使用，因此必须使用CompassDetachedHits方式

        // 测试CompassDetachedHits方式

        CompassDetachedHits hits = ct.findWithDetach("Compass*"
);

        logger.error("testDetachedFind() - CompassHits hits="

                + hits.getLength());
        for
 (int
 i = 0; i < hits.getLength(); i++) {
            Object hit = hits.data(i);
            if
 (hit instanceof Article) {
                Article item = (Article) hit;
                logger.error("testDetachedFind() - article     hits="

                        + item.getTitle());
            } else
 if
 (hit instanceof Author) {
                Author item = (Author) hit;
                logger.error("testDetachedFind() - author hits="

                        + item.getUsername());
            } else
 {
                logger.error("testDetachedFind() - error hits="
);
            }
        }

    }

    /**

     * 用于演示com.mobilesoft.framework.search.service.CompassSearchService的使用

     * 

     */

    class
 CompassSearch extends CompassSearchService{
        CompassSearch(){
            Compass compass = ct.getCompass();
            CompassSession session = compass.openSession();
            CompassTransaction tx = null
;

            try
 {
                tx = session.beginTransaction();
                CompassSearchCommand command = new
 CompassSearchCommand();
                command.setQuery("Compass"
);
                CompassSearchResults results= performSearch(command,session);
                logger.error("CompassSearch() - CompassHit TotalHits value="
 +results.getTotalHits());

                for
 (int
 i = 0; i < results.getHits().length; i++) {
                    CompassHit hits=results.getHits()[i];
                    Object hit=hits.getData();
                    logger.error("CompassSearch() - CompassHit hit="
 + hit); //$NON-NLS-1$


                    if
 (hit instanceof Article) {
                        Article item = (Article) hit;
                        logger.error("testCompassSearchService() - article     hits="

                                + item.getTitle());
                    } else
 if
 (hit instanceof Author) {
                        Author item = (Author) hit;
                        logger.error("testCompassSearchService() - author hits="

                                + item.getUsername());
                    } else
 {
                        logger.error("testCompassSearchService() - error hits="
);
                    }

                    tx.commit();
                }
            } catch
 (Exception e) {
                if
 (tx != null
) {
                    tx.rollback();
                }
            } finally
 {
                session.close();
            }        

        }

    }
    public
 void
 testCompassSearchService() {
        new
 CompassSearch();
        }

    protected
 void
 tearDown() throws Exception {
    }
}
.csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }

5、配置文件

applicationContext-compass.xml

<?
xml
 version
="1.0"
?>

<!
DOCTYPE
 beans
 PUBLIC
 "-//SPRING//DTD BEAN 2.0//EN"

    "http://www.springframework.org/dtd/spring-beans-2.0.dtd"
>

<
beans
 default-lazy-init
="true"
>

    <
bean
 id
="compassTemplate"
 class
="org.compass.core.CompassTemplate"
>

        <
property
 name
="compass"
 ref
="compass"
/>

    </
bean
>

    <
bean
 id
="annotationConfiguration"

        class
="org.compass.annotations.config.CompassAnnotationsConfiguration"
>

    </
bean
>

    <
bean
 id
="compass"
 class
="org.compass.spring.LocalCompassBean"
>

        <
property
 name
="classMappings"
>

            <
list
>

                <
value
>
com.mobilesoft.esales.model.Article</
value
>

                <
value
>
com.mobilesoft.esales.model.Author</
value
>

            </
list
>

        </
property
>

        <
property
 name
="compassConfiguration"
 ref
="annotationConfiguration"
/>


        <
property
 name
="compassSettings"
>

            <
props
>

                <
prop
 key
="compass.engine.connection"
>
 file://compass </
prop
>

                <
prop
 key
="compass.transaction.factory"
>

                    org.compass.spring.transaction.SpringSyncTransactionFactory
                    </
prop
>

                <
prop

                    key
="compass.engine.highlighter.default.formatter.simple.pre"
>

                    <!
[CDATA[<
font
 color
="red"
><
b
>
]]>

                </
prop
>

                <
prop

                    key
="compass.engine.highlighter.default.formatter.simple.post"
>

                    <!
[CDATA[</
b
></
font
>
]]>

                </
prop
>

            </
props
>

        </
property
>


        <
property
 name
="transactionManager"
 ref
="transactionManager"
/>

    </
bean
>


    <
bean
 id
="hibernateGpsDevice"

        class
="org.compass.gps.device.hibernate.HibernateGpsDevice"
>

        <
property
 name
="name"
>

            <
value
>
hibernateDevice</
value
>

        </
property
>

        <
property
 name
="sessionFactory"
 ref
="sessionFactory"
/>

        <
property
 name
="mirrorDataChanges"
>

            <
value
>
true</
value
>

        </
property
>

    </
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
>

                <
bean

                    class
="org.compass.spring.device.SpringSyncTransactionGpsDeviceWrapper"
>

                    <
property
 name
="gpsDevice"
 ref
="hibernateGpsDevice"
/>

                </
bean
>

            </
list
>

        </
property
>

    </
bean
>

    <
bean
 id
="compassSearchService"
 class
="com.mobilesoft.framework.search.service.CompassSearchService"
>

        <
property
 name
="compass"
 ref
="compass"
/>

        <
property
 name
="pageSize"
 value
="15"
/>

    </
bean
>


    <!-- 定时重建索引(利用quartz)或随Spring ApplicationContext启动而重建索引 -->

    <
bean
 id
="compassIndexBuilder"
 class
="com.mobilesoft.framework.search.service.CompassIndexBuilder"
 lazy-init
="false"
>

        <
property
 name
="compassGps"
 ref
="compassGps"
/>

        <
property
 name
="buildIndex"
 value
="false"
/>

        <
property
 name
="lazyTime"
 value
="10"
/>

    </
bean
>


</
beans
>
.csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }

applicationContext-dao.xml、applicationContext-service.xml、 applicationContext-resources.xml等略去。

 

6、Service层(参考了SpringSide实现)

.csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }

AdvancedSearchCommand.java

package com.mobilesoft.framework.search.service;

import java.util.HashSet;
import java.util.Set;

import org.apache.commons.lang.StringUtils;
import org.compass.core.CompassQuery.SortDirection;
import org.compass.core.CompassQuery.SortPropertyType;
import org.compass.core.support.search.CompassSearchCommand;

import org.springframework.util.Assert;

public
 class
 AdvancedSearchCommand extends CompassSearchCommand {

    /**

     * 封装基于Compass 的排序参数.

     */

    class
 CompassSort {

        private
 String name;

        private
 SortPropertyType type;

        private
 SortDirection direction;

        public
 CompassSort() {
        }

        public
 CompassSort(String sortParamName, String paramType,
                           boolean isAscend) {
            Assert.isTrue(StringUtils.isNotBlank(sortParamName));
            setName(sortParamName);

            if
 ("int"
.equalsIgnoreCase(paramType)) {
                setType(SortPropertyType.INT);
            } else
 if
 ("float"
.equalsIgnoreCase(paramType)) {
                setType(SortPropertyType.FLOAT);
            } else
 if
 ("string"
.equalsIgnoreCase(paramType)) {
                setType(SortPropertyType.STRING);
            } else
 {
                setType(SortPropertyType.AUTO);
            }

            if
 (isAscend) {
                setDirection(SortDirection.AUTO);
            } else
 {
                setDirection(SortDirection.REVERSE);
            }
        }

        public
 String getName() {
            return
 name;
        }

        public
 void
 setName(String name) {
            this
.name = name;
        }

        public
 SortPropertyType getType() {
            return
 type;
        }

        public
 void
 setType(SortPropertyType type) {
            this
.type = type;
        }

        public
 SortDirection getDirection() {
            return
 direction;
        }

        public
 void
 setDirection(SortDirection direction) {
            this
.direction = direction;
        }
    }

    /**

     * 搜索结果排序表.

     */

    private
 Set<CompassSort> sortMap = new
 HashSet<CompassSort>();

    private
 String[] highlightFields;

    /**

     * @param paramType 现定义了三种类型： int string 以及 float。<br>

     *                  除去这三种外，其他会被自动定义为SortPropertyType.AUTO 具体的可见{@link org.compass.core.CompassQuery.SortPropertyType}

     * @param isAscend  顺序还是倒序排序

     * @see org.compass.core.CompassQuery.SortPropertyType#AUTO

     * @see org.compass.core.CompassQuery.SortPropertyType#INT

     * @see org.compass.core.CompassQuery.SortPropertyType#STRING

     * @see org.compass.core.CompassQuery.SortPropertyType#FLOAT

     * @see org.compass.core.CompassQuery.SortDirection#AUTO

     * @see org.compass.core.CompassQuery.SortDirection#REVERSE

     */

    public
 void
 addSort(String sortParamName, String paramType, boolean isAscend) {
        this
.sortMap.add(new
 CompassSort(sortParamName, paramType, isAscend));
    }

    public
 Set<CompassSort> getSortMap() {
        return
 sortMap;
    }

    public
 void
 setSortMap(Set<CompassSort> sortMap) {
        this
.sortMap = sortMap;
    }

    public
 String[] getHighlightFields() {
        return
 highlightFields;
    }

    public
 void
 setHighlightFields(String[] highlightFields) {
        this
.highlightFields = highlightFields;
    }
}

CompassIndexBuilder.java

package com.mobilesoft.framework.search.service;

import org.apache.log4j.Logger;
import org.compass.gps.CompassGps;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.Assert;

/**

 * 通过quartz定时调度定时重建索引或自动随Spring ApplicationContext启动而重建索引的Builder.

 * 会启动后延时数秒新开线程调用compassGps.index()函数.

 * 默认会在Web应用每次启动时重建索引,可以设置buildIndex属性为false来禁止此功能.

 * 也可以不用本Builder, 编写手动调用compassGps.index()的代码.

 *

 */

public
 class
 CompassIndexBuilder implements InitializingBean {

    private
 static
 final Logger log = Logger.getLogger(CompassIndexBuilder.class
);

    // 是否需要建立索引，可被设置为false使本Builder失效.

    private
 boolean buildIndex = false
;

    // 索引操作线程延时启动的时间，单位为秒

    private
 int
 lazyTime = 10;

    // Compass封装

    private
 CompassGps compassGps;

    // 索引线程

    private
 Thread indexThread = new
 Thread() {

        @Override
        public
 void
 run() {
            try
 {
                Thread.sleep(lazyTime * 1000);

                log.info("begin compass index..."
);
                long
 beginTime = System.currentTimeMillis();
                // 重建索引.

                // 如果compass实体中定义的索引文件已存在，索引过程中会建立临时索引，

                // 索引完成后再进行覆盖.

                compassGps.index();
                long
 costTime = System.currentTimeMillis() - beginTime;
                log.info("compss index finished."
);
                log.info("costed "
 + costTime + " milliseconds"
);
            } catch
 (InterruptedException e) {
                // simply proceed

            }
        }
    };

    /**

     * 实现<code>InitializingBean</code>接口，在完成注入后调用启动索引线程.

     *

     * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()

     */

    public
 void
 afterPropertiesSet() throws Exception {
        if
 (buildIndex) {
            Assert.notNull(compassGps, "CompassIndexBuilder not set CompassGps yet."
);
            indexThread.setDaemon(true
);
            indexThread.setName("Compass Indexer"
);
            indexThread.start();
        }
    }

    public
 void
 setBuildIndex(boolean buildIndex) {
        this
.buildIndex = buildIndex;
    }

    public
 void
 setLazyTime(int
 lazyTime) {
        this
.lazyTime = lazyTime;
    }

    public
 void
 setCompassGps(CompassGps compassGps) {
        this
.compassGps = compassGps;
    }
}

CompassSearchService.java

package com.mobilesoft.framework.search.service;

import org.compass.core.Compass;
import org.compass.core.CompassCallback;
import org.compass.core.CompassDetachedHits;
import org.compass.core.CompassHits;
import org.compass.core.CompassQuery;
import org.compass.core.CompassSession;
import org.compass.core.CompassTemplate;
import org.compass.core.CompassTransaction;
import org.compass.core.support.search.CompassSearchCommand;
import org.compass.core.support.search.CompassSearchResults;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.Assert;

import com.mobilesoft.framework.search.service.AdvancedSearchCommand.CompassSort;
/**

 * 仿照 {@link org.compass.spring.web.mvc.CompassSearchController}

 * 中的代码，构建了一个Service，方便不使用Spring MVC 

 *

 * @see org.compass.spring.web.mvc.CompassSearchController

 * @see org.compass.spring.web.mvc.AbstractCompassCommandController

 */

public
 class
 CompassSearchService implements InitializingBean {

    //每页显示的条目数量

    private
 Integer pageSize = 15;

    private
 Compass compass;

    private
 CompassTemplate compassTemplate;

    /**

     * 公开的搜索接口，返回匹配的搜索结果，与

     * {@link org.compass.spring.web.mvc.CompassSearchController#handle(javax.servlet.http.HttpServletRequest,

     *javax.servlet.http.HttpServletResponse,Object,org.springframework.validation.BindException) 处理相似

     *

     * @see org.compass.spring.web.mvc.CompassSearchController#handle(javax.servlet.http.HttpServletRequest,

     *javax.servlet.http.HttpServletResponse,java.lang.Object,org.springframework.validation.BindException)

     */

    public
 CompassSearchResults search(final CompassSearchCommand command) {
        return
 (CompassSearchResults) getCompassTemplate().execute(
                CompassTransaction.TransactionIsolation.READ_ONLY_READ_COMMITTED, new
 CompassCallback() {
            public
 Object doInCompass(CompassSession session) {
                return
 performSearch(command, session);
            }
        });
    }

    /**

     * 通过此方法调用搜索引擎,进行结果匹配搜索.

     *

     * @see org.compass.spring.web.mvc.CompassSearchController#performSearch(

     *org.compass.spring.web.mvc.CompassSearchCommand,org.compass.core.CompassSession)

     */

    protected
 CompassSearchResults performSearch(CompassSearchCommand searchCommand, CompassSession session) {
        long
 time = System.currentTimeMillis();
        CompassQuery query = buildQuery(searchCommand, session);
        CompassHits hits = query.hits();
        CompassDetachedHits detachedHits;
        CompassSearchResults.Page[] pages = null
;
        if
 (pageSize == null
) {
            doProcessBeforeDetach(searchCommand, session, hits, -1, -1);
            detachedHits = hits.detach();
        } else
 {
            int
 iPageSize = pageSize;
            int
 page = 0;
            int
 hitsLength = hits.getLength();
            if
 (searchCommand.getPage() != null
) {
                page = searchCommand.getPage();
            }
            int
 from = page * iPageSize;

            if
 (from > hits.getLength()) {

                // 如果起始的条目大于搜索到的条目

                from = hits.getLength() - iPageSize;
                doProcessBeforeDetach(searchCommand, session, hits, from, hitsLength);
                detachedHits = hits.detach(from, hitsLength);
            } else
 if
 ((from + iPageSize) > hitsLength) {

                // 结束的条目大于搜索到的结果

                doProcessBeforeDetach(searchCommand, session, hits, from, hitsLength);
                detachedHits = hits.detach(from, hitsLength);
            } else
 {

                // 中间的页码，直接取出相应的条目

                doProcessBeforeDetach(searchCommand, session, hits, from, iPageSize);
                detachedHits = hits.detach(from, iPageSize);
            }
            doProcessAfterDetach(searchCommand, session, detachedHits);
            int
 numberOfPages = (int
) Math.ceil((float
) hitsLength / iPageSize);
            pages = new
 CompassSearchResults.Page[numberOfPages];
            for
 (int
 i = 0; i < pages.length; i++) {
                pages[i] = new
 CompassSearchResults.Page();
                pages[i].setFrom(i * iPageSize + 1);
                pages[i].setSize(iPageSize);
                pages[i].setTo((i + 1) * iPageSize);
                if
 (from >= (pages[i].getFrom() - 1) && from < pages[i].getTo()) {
                    pages[i].setSelected(true
);
                } else
 {
                    pages[i].setSelected(false
);
                }
            }
            if
 (numberOfPages > 0) {
                CompassSearchResults.Page lastPage = pages[numberOfPages - 1];
                if
 (lastPage.getTo() > hitsLength) {
                    lastPage.setSize(hitsLength - lastPage.getFrom());
                    lastPage.setTo(hitsLength);
                }
            }
        }
        time = System.currentTimeMillis() - time;
        CompassSearchResults searchResults = new
 CompassSearchResults(detachedHits.getHits(), time, pageSize);
        searchResults.setPages(pages);
        return
 searchResults;
    }

    /**

     * 构建Lucene搜索器.

     */

    protected
 CompassQuery buildQuery(CompassSearchCommand searchCommand, CompassSession session) {
        CompassQuery query = session.queryBuilder().queryString(searchCommand.getQuery().trim()).toQuery();

        if
 (AdvancedSearchCommand.class
.isAssignableFrom(searchCommand.getClass())) {
            AdvancedSearchCommand advancedSearchCommand = (AdvancedSearchCommand) searchCommand;

            for
 (CompassSort sort : advancedSearchCommand.getSortMap()) {
                query.addSort(sort.getName(), sort.getType(), sort.getDirection());
            }
        }
        return
 query;
    }

    /**

     * 在detach 之前，可以做一些操作。比如highlighting...

     *

     * @param from 需要注意的是，如果pageSize 没有指定，那么这里传入的参数为-1

     */

    protected
 void
 doProcessBeforeDetach(CompassSearchCommand searchCommand, CompassSession session, CompassHits hits,
                                         int
 from, int
 size) {
        if
 (AdvancedSearchCommand.class
.isAssignableFrom(searchCommand.getClass())) {
            if
 (from < 0) {
                from = 0;
                size = hits.getLength();
            }
            String[] highlightFields = ((AdvancedSearchCommand) searchCommand).getHighlightFields();

            if
 (highlightFields == null
) {
                return
;
            }

            // highlight fields

            for
 (int
 i = from; i < size; i++) {
                for
 (String highlightField : highlightFields) {
                    hits.highlighter(i).fragment(highlightField);
                }
            }
        }
    }

    /**

     * An option to perform any type of processing before the hits are detached.

     */

    protected
 void
 doProcessAfterDetach(CompassSearchCommand searchCommand, CompassSession session,
                                        CompassDetachedHits hits) {

    }

    public
 void
 afterPropertiesSet() throws Exception {
        Assert.notNull(compass, "Must set compass property"
);
        this
.compassTemplate = new
 CompassTemplate(compass);
    }

    public
 Integer getPageSize() {
        return
 pageSize;
    }

    public
 void
 setPageSize(Integer pageSize) {
        this
.pageSize = pageSize;
    }

    public
 void
 setCompass(Compass compass) {
        this
.compass = compass;
    }

    protected
 CompassTemplate getCompassTemplate() {
        return
 this
.compassTemplate;
    }

}

.csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }

8、Model层

@SearchableId 声明Document的id列；

@SearchableProperty 声明要索引的field；

@SearchableComponent 声明要索引的其他关联对象。

Article.java 

package com.mobilesoft.esales.model;

import java.util.Date;

import org.compass.annotations.Searchable;
import org.compass.annotations.SearchableId;
import org.compass.annotations.SearchableProperty;
import org.compass.core.CompassTemplate;

@Searchable
public
 class
 Article  implements java.io.Serializable {

    @SearchableId
    private
 Integer id;
    @SearchableProperty(name="title"
)
    private
 String title;
    @SearchableProperty(name="author"
)
    private
 Integer author;
    @SearchableProperty(name="publishDate"
)
    private
 Date publishDate;

    /** default constructor */

    public
 Article() {
    }

    /** minimal constructor */

    public
 Article(String title, Date publishDate) {
        this
.title = title;
        this
.publishDate = publishDate;
    }

    /** full constructor */

    public
 Article(String title, Integer author, Date publishDate) {
        this
.title = title;
        this
.author = author;
        this
.publishDate = publishDate;
    }

    public
 Integer getId() {
        return
 this
.id;
    }

    public
 void
 setId(Integer id) {
        this
.id = id;
    }

    public
 String getTitle() {
        return
 this
.title;
    }

    public
 void
 setTitle(String title) {
        this
.title = title;
    }

    public
 Integer getAuthor() {
        return
 this
.author;
    }

    public
 void
 setAuthor(Integer author) {
        this
.author = author;
    }

    public
 Date getPublishDate() {
        return
 this
.publishDate;
    }

    public
 void
 setPublishDate(Date publishDate) {
        this
.publishDate = publishDate;
    }

}
.csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }

Author.java 

package com.mobilesoft.esales.model;

import org.compass.annotations.Searchable;
import org.compass.annotations.SearchableId;
import org.compass.annotations.SearchableProperty;
import org.compass.core.CompassTemplate;

@Searchable
public
 class
 Author  implements java.io.Serializable {

    @SearchableId
    private
 Integer id;
    @SearchableProperty(name="username"
)
    private
 String username;
    private
 String password;
    @SearchableProperty(name="age"
)
    private
 Short age;

    public
 Author() {
    }

    /** minimal constructor */

    public
 Author(String username, String password) {
        this
.username = username;
        this
.password = password;
    }

    /** full constructor */

    public
 Author(String username, String password, Short age) {
        this
.username = username;
        this
.password = password;
        this
.age = age;
    }

    // Property accessors


    public
 Integer getId() {
        return
 this
.id;
    }

    public
 void
 setId(Integer id) {
        this
.id = id;
    }

    public
 String getUsername() {
        return
 this
.username;
    }

    public
 void
 setUsername(String username) {
        this
.username = username;
    }

    public
 String getPassword() {
        return
 this
.password;
    }

    public
 void
 setPassword(String password) {
        this
.password = password;
    }

    public
 Short getAge() {
        return
 this
.age;
    }

    public
 void
 setAge(Short age) {
        this
.age = age;
    }

}
.csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }

9、DAO层

ArticleDAO.java和AuthorDAO.java省略

直接用MyEclipse生成的，没有什么特别的。

10、参考文档

http://www.compass-project.org/docs/1.2.1/reference/html/

The Compass Framework Search made easy.pdf

Compass TSSJS Europe 06.pdf

Hello World Tutorial

InfoQ:  Compass: Integrate Search into your apps

InfoQ: Compass: Simplifying and Extending Lucene to Provide Google-like Search

InfoQ: Compass: 在你的应用中集成搜索功能

Compass 指南

http://www.kimchy.org/

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