一个简单的COMPASS应用

一个简单的COMPASS应用

首先你要下载Compass framework: Download Compass.
你需要在你的class path 中添加4个jarcompass-x/modules/core/compass-core-x.jar, compass/modules/core/lib/commons-logging-x.jar, compass-x/modules/core/lib/log4j-x.jar, compass-x/modules/core/lib/lucene-core-x-rc1-dev.jar.
在你的项目中创建下面的目录(可以根据自己的定义来改动)：
log4j.properties
- org
   - compassframework
     - sample
       - example
           alias.cmd.xml
           compass.cfg.xml
           CompassExample.java
           Phrase.cpm.xml
           Phrase.java
下面说一下几个重要的配置文件

 compass.cfg.xmlcode

指定的target/index 是一个存储目录放索引文件的

（这个类必须有个无参数的构造和id属性）

xml 代码

<!---->


"http://static.compassframework.org/dtd/compass-core-configuration-1.0.dtd">



<

compass-core-configuration>
<compass>

<setting name="compass.engine.connection">target/indexsetting>

<meta-data resource="org/compassframework/sample/example/alias.cmd.xml" />

compass>

compass-core-configuration>

 alias.cmd.xml:

xml 代码

<!---->

xml version="1.0"?>
<!---->
"-//Compass/Compass Core Meta Data DTD 1.0//EN"
"http://static.compassframework.org/dtd/compass-core-meta-data-1.0.dtd">
<compass-core-meta-data>
<meta-data-group id="example" displayName="Example Meta Data">

<description>Example Meta Datadescription>

<uri>http://compass/exampleuri>


<alias id="phrase" displayName="Phrase">

<description>Phrase aliasdescription>

<uri>http://compass/example/phraseuri>

<name>phrasename>

alias>

<meta-data id="author" displayName="Author">

<description>Author aliasdescription>

<uri>http://compass/example/authoruri>

<name>authorname>

meta-data>

<meta-data id="text" displayName="Text">

<description>Text aliasdescription>

<uri>http://compass/example/texturi>

<name>textname>

meta-data>

meta-data-group>

compass-core-meta-data>

Phrase.java

java 代码

package org.compassframework.sample.example;

public class Phrase {

 private String author;

 private String text;

 private Long id;

 public Phrase() {

 }

 public String getAuthor() {
     return author;
 }

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

 public String getText() {
     return text;
 }

 public void setText(String text) {
     this.text = text;
 }

 public Long getId() {
     return id;
 }

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

 public String toString() {

     return text;
 }

}

Phrase.cpm.xml


 

xml 代码

<!---->xml version="1.0"?>
<!---->
"-//Compass/Compass Core Mapping DTD 1.0//EN"
"http://static.compassframework.org/dtd/compass-core-mapping-1.0.dtd">
<compass-core-mapping package="org.compassframework.sample.example">
<class name="Phrase" alias="${example.phrase}">

<id name="id" />

<property name="author">

<meta-data>${example.author}meta-data>

property>

<property name="text">

<meta-data>${example.text}meta-data>

property>

class>

compass-core-mapping>

CompassExample.java

java 代码

package org.compassframework.sample.example;

import org.apache.log4j.Logger;

import org.compassframework.core.Compass;
import org.compassframework.core.Compass;
import org.compassframework.core.CompassSession;
import org.compassframework.core.CompassTransaction;
import org.compassframework.core.config.CompassConfiguration;

public class CompassExample {

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

 private compasscompass;

 public static void main(String[] args){
     new CompassExample().process();
 }

 private void process(){
     CompassConfiguration config = new CompassConfiguration();
     config.configure("org/compassframework/sample/example/compass.cfg.xml");
     config.addClass(Phrase.class);
     compass = config.buildCompass();
     compass.getSearchEngineIndexManager().deleteIndex();
     compass.getSearchEngineIndexManager().createIndex();

     createIndex();
     search("mule AND crazy");
     search("Marisol OR Ramon");
 }

 private void createIndex(){
  CompassSession session = compass.openSession();
     CompassTransaction tx = session.beginTransaction();
     Phrase phrase = new Phrase();
     phrase.setAuthor("Joe");
     phrase.setText("I don't think it's nice you laughing. " +
            "You see my mule don't like people laughing. " +
            "He gets the crazy idea you're laughing at him. " +
            "Now if you apologize like I know you're going to, " +
            "I might convince him that you really didn't mean it...");
     phrase.setId(new Long(1));
     session.save(phrase);
     tx.commit();
     session.close();
 }

 private void search(String query){
     CompassSession session = compass.openSession();
     CompassTransaction tx = session.beginTransaction();
     Compass hits = session.find(query);
     if (logger.isDebugEnabled()) {
        logger.debug("search() - Found " + hits.getLength()+" hits for \""+query+"\"");
     }
     for (int i = 0; i < hits.getLength(); i++) {
        print(hits, i);
     }
     hits.close();
     tx.commit();
     session.close();
     compass.close();
 }

 private void print(Compass hits, int hitNumber) {
     Phrase value = (Phrase)hits.data(hitNumber);
     if (logger.isDebugEnabled()) {
         logger.debug("print() - Phrase by " + value.getAuthor() + ": "
             + value.getText());
     }
 }

}

 

为了保证能打印出我们的测试，需要加入log4j.properties ：
log4j.rootLogger=ERROR, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d %p %c - %m%n
log4j.logger.org.compassframework.sample.example=DEBUG

下面是打印出来的测试结果：
search() - Found 1 hits for "mule AND crazy"
print() - Phrase by Joe: I don't think it's nice you laughing...
search() - Found 0 hits for "Marisol OR Ramon"