BroadLeaf項目搜索功能改進

原創 jackchen10 2018-09-04 21:17

Broadleaf Commerce 是一個開源的Java電子商務平臺，基於Spring框架開發，提供一個可靠、可擴展的架構，可進行深度的定製和快速開發。

關於Solr

Broadleaf項目中關於商品的搜索使用了嵌入式的Solr服務器，這個從配置文件中可以看出來。

從示例網站源代碼的applicationContext.xml文件中可以看到關於solr的配置：

    <bean id="solrEmbedded" class="java.lang.String">
        <constructor-arg value="solrhome"/>
    </bean>

   <bean id="blSearchService" class="org.broadleafcommerce.core.search.service.solr.SolrSearchServiceImpl">
        <constructor-arg name="solrServer" ref="${solr.source}" />
        <constructor-arg name="reindexServer" ref="${solr.source.reindex}" />
    </bean> 
    <bean id="rebuildIndexJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <property name="targetObject" ref="blSearchService" />
        <property name="targetMethod" value="rebuildIndex" />
    </bean> 
    <bean id="rebuildIndexTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerFactoryBean">
        <property name="jobDetail" ref="rebuildIndexJobDetail" />
        <property name="startDelay" value="${solr.index.start.delay}" />
        <property name="repeatInterval" value="${solr.index.repeat.interval}" />
    </bean>
    <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="rebuildIndexTrigger" />
                <!--<ref bean="purgeCartTrigger" />-->
                <!--<ref bean="purgeCustomerTrigger" />-->
            </list>
        </property>
    </bean>

資源配置文件在common.properties:

web.defaultPageSize=15
web.maxPageSize=100

solr.source=solrEmbedded
solr.source.reindex=solrEmbedded
solr.index.start.delay=5000
solr.index.repeat.interval=3600000

從上可以看出使用的Solr是嵌入式服務，Solr配置文件（schema.xml和solrconfig.xml）在 https://github.com/BroadleafCommerce/DemoSite/tree/master/site/src/main/resources目錄下。

從源代碼SolrSearchServiceImpl.java中可以看出,一共啓動了兩個Solr服務，分別對應primary和reindex兩個solrcore，primary用於查詢，reindex用於重建索引。

改進搜索引擎

改進目標

本篇文章只是將嵌入式Solr服務換成獨立運行的Solr服務，你還可以更進一步換成SolrCloud集羣。

  • 單獨搭建搜素引擎服務器
  • 支持增量更新索引
  • 支持手動重建索引

設計思路

  • 1.修改原系統中的嵌入式搜索引擎爲獨立部署的搜索引擎，安裝方法見下文。
  • 2.擴展原系統中的SolrSearchServiceImpl類，添加增加索引的方法。
  • 3.修改原來系統中商品的service類（我這裏調用的是LLCatalogServiceImpl，該類是新添加的），在saveProduct方法中添加往搜索引擎添加索引的方法。
  • 4.修改原系統中solr相關的配置文件。
  • 5.修改原系統中的重建索引的定時任務，以支持手動重建索引。

實現方法

1、搭建獨立運行的solr服務器

你可以參考：Apache Solr介紹及安裝

關鍵在於solr/home的定義，以及在該目錄下創建兩個目錄，分別爲primary和reindex，兩個目錄下的配置文件都一樣，solr/home目錄結構如下：

➜  solrhome-solr  tree -L 3
.
├── primary
│   └── conf
│       ├── schema.xml
│       └── solrconfig.xml
├── reindex
│   └── conf
│       ├── schema.xml
│       └── solrconfig.xml
└── solr.xml

4 directories, 5 files

solr.xml文件內容如下：

<?xml version="1.0" encoding="UTF-8" ?>
<solr persistent="true">
  <cores defaultCoreName="primary" adminPath="/admin/cores">
    <core instanceDir="reindex" name="reindex"/>
    <core instanceDir="primary" name="primary"/>
  </cores>
</solr>

schema.xml內容和原來的基本一樣，只是添加了一行：

<field name="_version_" type="long" indexed="true" stored="true" multiValued="false"/>

solrconfig.xml內容如下：

<?xml version="1.0" encoding="UTF-8" ?>
<config>
  <luceneMatchVersion>4.4</luceneMatchVersion>
  <directoryFactory name="DirectoryFactory" class="${solr.directoryFactory:solr.StandardDirectoryFactory}"/>

  <schemaFactory class="ClassicIndexSchemaFactory"/>

  <updateHandler class="solr.DirectUpdateHandler2">
    <autoCommit>
        <maxDocs>2</maxDocs>
        <maxTime>3000</maxTime>
    </autoCommit>
  </updateHandler>

  <requestHandler name="/get" class="solr.RealTimeGetHandler">
    <lst name="defaults">
      <str name="omitHeader">true</str>
    </lst>
  </requestHandler>

  <requestHandler name="/replication" class="solr.ReplicationHandler" startup="lazy" /> 

  <requestDispatcher handleSelect="true" >
    <requestParsers enableRemoteStreaming="false" multipartUploadLimitInKB="2048" formdataUploadLimitInKB="2048" />
    <httpCaching never304="true" />
  </requestDispatcher>

  <requestHandler name="standard" class="solr.StandardRequestHandler" default="true" />
  <requestHandler name="/analysis/field" startup="lazy" class="solr.FieldAnalysisRequestHandler" />
  <requestHandler name="/update" class="solr.UpdateRequestHandler"  />
  <requestHandler name="/update/csv" class="solr.CSVRequestHandler" startup="lazy" />
  <requestHandler name="/update/json" class="solr.JsonUpdateRequestHandler" startup="lazy" />
  <requestHandler name="/admin/" class="org.apache.solr.handler.admin.AdminHandlers" />

  <requestHandler name="/admin/ping" class="solr.PingRequestHandler">
    <lst name="invariants">
      <str name="q">solrpingquery</str>
    </lst>
    <lst name="defaults">
      <str name="echoParams">all</str>
    </lst>
  </requestHandler>

  <queryResponseWriter name="json" class="solr.JSONResponseWriter">
        <str name="content-type">text/plain; charset=UTF-8</str>
  </queryResponseWriter>

  <!-- config for the admin interface --> 
  <admin>
    <defaultQuery>solr</defaultQuery>
  </admin>
</config>

2、擴展SolrSearchServiceImpl類

在core模塊創建org.broadleafcommerce.core.search.service.solr.ExtSolrSearchService接口，該接口定義如下：

package org.broadleafcommerce.core.search.service.solr;
import java.io.IOException;
import org.broadleafcommerce.common.exception.ServiceException;
import org.broadleafcommerce.core.catalog.domain.Product;
import org.broadleafcommerce.core.search.service.SearchService;

public interface ExtSolrSearchService extends SearchService {
    public void addProductIndex(Product product) throws ServiceException,
            IOException;
}

然後，創建其實現類org.broadleafcommerce.core.search.service.solr.ExtSolrSearchServiceImpl，該實現類定義如下：

package org.broadleafcommerce.core.search.service.solr;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import javax.annotation.Resource;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.solr.client.solrj.SolrServer;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.common.SolrInputDocument;
import org.broadleafcommerce.common.exception.ServiceException;
import org.broadleafcommerce.common.locale.domain.Locale;
import org.broadleafcommerce.common.util.StopWatch;
import org.broadleafcommerce.common.util.TransactionUtils;
import org.broadleafcommerce.core.catalog.domain.Product;
import org.broadleafcommerce.core.search.domain.Field;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;
import org.xml.sax.SAXException;

public class ExtSolrSearchServiceImpl extends SolrSearchServiceImpl implements
        ExtSolrSearchService {
    private static final Log LOG = LogFactory
            .getLog(ExtSolrSearchServiceImpl.class);
    @Resource(name = "blSolrIndexService")
    protected SolrIndexServiceImpl solrIndexServiceImpl;
    public ExtSolrSearchServiceImpl(SolrServer solrServer,
            SolrServer reindexServer) {
        super(solrServer, reindexServer);
    }
    public ExtSolrSearchServiceImpl(SolrServer solrServer) {
        super(solrServer);
    }
    public ExtSolrSearchServiceImpl(String solrServer, String reindexServer)
            throws IOException, ParserConfigurationException, SAXException {
        super(solrServer, reindexServer);
    }
    public ExtSolrSearchServiceImpl(String solrServer) throws IOException,
            ParserConfigurationException, SAXException {
        super(solrServer);
    }
    public void addProductIndex(Product product) throws ServiceException,
            IOException {
        TransactionStatus status = TransactionUtils.createTransaction(
                "saveProduct", TransactionDefinition.PROPAGATION_REQUIRED,
                solrIndexServiceImpl.transactionManager, true);
        StopWatch s = new StopWatch();
        try {
            List<Field> fields = fieldDao.readAllProductFields();
            List<Locale> locales = solrIndexServiceImpl.getAllLocales();
            SolrInputDocument document = solrIndexServiceImpl.buildDocument(
                    product, fields, locales);
            if (LOG.isTraceEnabled()) {
                LOG.trace(document);
            }
            SolrContext.getServer().add(document);
            SolrContext.getServer().commit();
            TransactionUtils.finalizeTransaction(status,
                    solrIndexServiceImpl.transactionManager, false);
        } catch (SolrServerException e) {
            TransactionUtils.finalizeTransaction(status,
                    solrIndexServiceImpl.transactionManager, true);
            throw new ServiceException("Could not rebuild index", e);
        } catch (IOException e) {
            TransactionUtils.finalizeTransaction(status,
                    solrIndexServiceImpl.transactionManager, true);
            throw new ServiceException("Could not rebuild index", e);
        } catch (RuntimeException e) {
            TransactionUtils.finalizeTransaction(status,
                    solrIndexServiceImpl.transactionManager, true);
            throw e;
        }
        LOG.info(String.format("Finished adding index in %s", s.toLapString()));
    }
    protected List<Product> getProducts(QueryResponse response) {
        final List<Long> productIds = new ArrayList<Long>();
        SolrDocumentList docs = response.getResults();
        for (SolrDocument doc : docs) {
            productIds
                    .add((Long) doc.getFieldValue(shs.getProductIdFieldName()));
        }
        /**
         * TODO 請添加緩存相關代碼
         */
        List<Product> products = productDao.readProductsByIds(productIds);
        // We have to sort the products list by the order of the productIds list
        // to maintain sortability in the UI
        if (products != null) {
            Collections.sort(products, new Comparator<Product>() {
                public int compare(Product o1, Product o2) {
                    return new Integer(productIds.indexOf(o1.getId()))
                            .compareTo(productIds.indexOf(o2.getId()));
                }
            });
        }
        return products;
    }
}

3、 修改solr相關配置文件

a. 刪除web模塊中/web/src/main/webapp/WEB-INF/applicationContext.xml的以下代碼：

<bean id="blSearchService" class="org.broadleafcommerce.core.search.service.solr.SolrSearchServiceImpl">
    <constructor-arg name="solrServer" ref="${solr.source}" />
    <constructor-arg name="reindexServer" ref="${solr.source.reindex}" />
</bean>

b.刪除web模塊中web/src/main/resources/runtime-properties/common.properties的以下代碼：

solr.source=solrEmbedded
solr.source.reindex=solrEmbedded

c. 在core模塊中core/src/main/resources/applicationContext.xml添加如下代碼：

<bean id="solrServer" class="org.apache.solr.client.solrj.impl.HttpSolrServer">
    <constructor-arg value="${solr.url}" />
</bean>
<bean id="solrReindexServer" class="org.apache.solr.client.solrj.impl.HttpSolrServer">
    <constructor-arg value="${solr.url.reindex}" />
</bean>
<bean id="blSearchService"
    class="org.broadleafcommerce.core.search.service.solr.ExtSolrSearchServiceImpl">
    <constructor-arg name="solrServer" ref="${solr.source}" />
    <constructor-arg name="reindexServer" ref="${solr.source.reindex}" />
</bean>

d. 在core模塊中core/src/main/resources/runtime-properties/common-shared.properties添加如下代碼：

solr.url=http://localhost:8080/solr
solr.url.reindex=http://localhost:8080/solr/reindex
solr.source=solrServer
solr.source.reindex=solrReindexServer

4、 修改LLCatalogServiceImpl類

添加如下代碼：

@Resource(name = "blSearchService")
private ExtSolrSearchService extSolrSearchService;

修改該類的saveProduct方法如下：

@Override
@Transactional("blTransactionManager")
public Product saveProduct(Product product) {
    Product dbProduct = catalogService.saveProduct(product);
    try {
        extSolrSearchService.addProductIndex(dbProduct);
    } catch (ServiceException e) {
        e.printStackTrace();
        throw new RuntimeException(e);
    } catch (IOException e) {
        e.printStackTrace();
        throw new RuntimeException(e);
    }
    return dbProduct;
}

5、 修改定時任務

a. web系統啓動時候，會查詢數據庫中商品，然後重建索引。該功能在applicationContext.xml中已經定義了定時任務，建議取消該定時任務。去掉以下代碼：

<bean id="rebuildIndexJobDetail"
    class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
    <property name="targetObject" ref="blSearchService" />
    <property name="targetMethod" value="rebuildIndex" />
</bean>
<bean id="rebuildIndexTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean">
    <property name="jobDetail" ref="rebuildIndexJobDetail" />
    <property name="startDelay" value="${solr.index.start.delay}" />
    <property name="repeatInterval" value="${solr.index.repeat.interval}" />
</bean>
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
    <property name="triggers">
        <list>
            <ref bean="rebuildIndexTrigger" />
        </list>
    </property>
</bean>

b. 編寫main方法，打成jar包，然後編寫shell腳本，用於手動重建索引或者設置定時任務。該類需要獲取一個名稱爲blSearchService的bean，然後調用該bean的rebuildIndex方法,主要代碼如下。

@Resource(name = "blSearchService")
private SearchService extSolrSearchService;

public void doRebuild(){
    extSolrSearchService.rebuildIndex();
}
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