6、统计solr目录索引信息

package com.main.java.solr.statistics;

import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexableField;
import org.apache.lucene.search.ScoreDoc;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

/**
 * 统计目录下索引信息
 */
public class SolrIndexInfoStatistics {
    public static final Logger LOG= LoggerFactory.getLogger(SolrIndexInfoStatistics.class);

    private static final String DEFAULT_PATH="/data/index";
    private static String upperDir;

    private static List<SolrIndexInfo> result;

    /**
     * 给出一个上层目录，统计所有子目录的索引信息 （目录名称，索引数目，字段个数，一行字段值和字段名称
     * @param args
     */
    public static void main(String[] args) {

        if(null==args||0==args.length){
            args=new String[]{"F:\\indexTest"};
           // return;
        }
        upperDir=args[0];
        statisticsSolrIndexInfo(upperDir);
        displayIndexInfo(result);
    }

    //计目录下索引信息
    private static void statisticsSolrIndexInfo(String upperDir){
        List<String> list=fetchSubDirs(upperDir);
        result=new ArrayList<>();
        for (String path : list) {
            IndexReader reader=SolrUtil.getReader(path);
            if(null==reader){
                continue;
            }
            ScoreDoc [] scoreDoc=SolrUtil.queryDocs(reader,path);
            if(null ==scoreDoc){
                continue;
            }
            SolrIndexInfo info=new SolrIndexInfo();
            info.setFilePath(path);
            info.setIndexNum(scoreDoc.length);
            Document doc=null;
            try {
                doc=reader.document(scoreDoc[0].doc);
            } catch (IOException e) {
                e.printStackTrace();
            }
            List<IndexableField> fieldsList= doc.getFields();
            String [] fields=new String[fieldsList.size()];
            Object [] values=new Object[fieldsList.size()];
            for(int i=0;i<fieldsList.size();i++){
                fields[i]=fieldsList.get(i).name();
                values[i]=doc.get(fields[i]);
            }
            info.setFields(fields);
            info.setValues(values);
            info.setFieldNum(fieldsList.size());
            result.add(info);
        }
    }
    //展示获取的索引信息
    private static void displayIndexInfo(List<SolrIndexInfo> infos){
        for (SolrIndexInfo info : infos) {
            System.out.println(info.toString());
        }
    }
    //获取子目录
    private static List<String> fetchSubDirs(String upperDir){
        List<String> list=new ArrayList<>();
        //判断目录是否存在
        if(!new File(upperDir).exists()){
            LOG.error("目录不存在：{}",upperDir);
            return list;
        }
        File [] files=new File(upperDir).listFiles();
        for (File file : files) {
            String fileName=file.getName();
            String filePath=upperDir+File.separator+fileName+DEFAULT_PATH;
            if(new File(filePath).exists()){
                list.add(filePath);
            }else{
                LOG.error("目录不存在：{}",filePath);
            }
        }
        return list;
    }
}

package com.main.java.solr.statistics;

/**
 * 索引信息 （目录名称，索引数目，字段个数，三行字段值和字段名称 字段名称s ，一行字段值
 */
public class SolrIndexInfo {

    private String filePath;

    private int indexNum;

    private int fieldNum;

    private String [] fields;

    private Object [] values;

    public String getFilePath() {
        return filePath;
    }

    public void setFilePath(String filePath) {
        this.filePath = filePath;
    }

    public int getIndexNum() {
        return indexNum;
    }

    public void setIndexNum(int indexNum) {
        this.indexNum = indexNum;
    }

    public int getFieldNum() {
        return fieldNum;
    }

    public void setFieldNum(int fieldNum) {
        this.fieldNum = fieldNum;
    }

    public String[] getFields() {
        return fields;
    }

    public void setFields(String[] fields) {
        this.fields = fields;
    }

    public Object[] getValues() {
        return values;
    }

    public void setValues(Object[] values) {
        this.values = values;
    }
    public String toString(){
        StringBuffer sb=new StringBuffer();
        sb.append("索引目录：").append(filePath).append(",")
                .append("索引数目：").append(indexNum).append(",")
                .append("索引字段个数：").append(fieldNum).append(",")
                .append("字段名称和值：");
        for(int i=0;i<fields.length;i++){
            StringBuilder builder=new StringBuilder();
            String fieldInfo=builder.append(fields[i]).append(":").append(values[i]).append(",").toString();
            sb.append(fieldInfo);
        }
        return sb.toString();
    }

}

package com.main.java.solr.statistics;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.queryparser.classic.ParseException;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.NIOFSDirectory;
import org.apache.solr.store.hdfs.HdfsDirectory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.nio.file.Paths;

/**
 * Solr常用方法
 */
public class SolrUtil {
    public static final Logger LOGGER= LoggerFactory.getLogger(SolrUtil.class);

    /**
     *  设置查询条件
     * @param queryDefaultFieldName 查询的字段信息 *:* 表示查询所有字段
     * @return query
     * @throws org.apache.lucene.queryparser.classic.ParseException
     */
    public static Query getQuery(String queryDefaultFieldName) throws ParseException {
        //实例化分析器
        Analyzer analyzer=new StandardAnalyzer();
        //建立查询解析器
        /**
         * 第一个参数是要查询的字段；
         * 第二个参数是分析器Analyzer
         * */
        QueryParser parser=new QueryParser(queryDefaultFieldName, analyzer);
        //根据传进来的queryStr查找
        Query query = parser.parse("*:*");
        return query;
    }

    /**
     * 通过directory得到的路径下的所有的文件
     * @param luceneFileDir lucene文件路径,linux 本地路径"/usr/temp/lucene/index"和hdfs路径 "hdfs://SERVICE-HADOOP-001,hdh184:8020,hdh185:8020/tmp/lucene/index"
     * @return indexReader
     */
    public static IndexReader getReader(String luceneFileDir){
        IndexReader reader=null;
        if(luceneFileDir.contains("hdfs")){
            Configuration conf =new Configuration();
            try {
                HdfsDirectory directory=new HdfsDirectory(new Path(luceneFileDir),conf);
                reader= DirectoryReader.open(directory);
            } catch (IOException e) {
                LOGGER.error(("读取索引目录异常，索引目录：" + luceneFileDir + " 异常信息：" + e.getMessage()));
            }
            return  reader;
        }else{
            try {
                //得到读取索引文件的路径
                Directory dir = NIOFSDirectory.open(Paths.get(luceneFileDir));
                //通过dir得到的路径下的所有的文件
                reader=  DirectoryReader.open(dir);
            }catch (IOException e){
                LOGGER.error(("读取索引目录异常，索引目录："+luceneFileDir+" 异常信息："+e.getMessage()));
            }
            if(null==reader){
                LOGGER.warn("初始化indexReader失败，reader is null");
            }
            return reader;
        }
    }

    /**
     * 获取索引信息
     * @param reader IndexReader
     * @return ScoreDoc[] 存储的为所有索引数据的id
     */
    public static ScoreDoc[] queryDocs(IndexReader reader,String luceneFileDir){
        ScoreDoc[] docs =null;
        if(null!=reader){
            //索引总条数
            int numDocs=reader.numDocs();
            if(0==numDocs){
                return docs;
            }
            //建立索引查询器
            IndexSearcher is=new IndexSearcher(reader);
            //设置查询条件
            Query query;
            try {
                query = SolrUtil.getQuery("*:*");
                if(null!=query){
                    TopDocs hits;
                    /**
                     * 第一个参数是通过传过来的参数来查找得到的query；
                     * 第二个参数是要出查询的行数
                     * */
                    hits = is.search(query, numDocs);
                    if(null!=hits){
                        //获取所有的索引id集合
                        docs= hits.scoreDocs;
                        LOGGER.info("查询到目录"+luceneFileDir+"索引总条数为："+docs.length);
                    } else{
                        LOGGER.error("查询出错，未查询到满足query条件的索引信息");
                    }
                }else{
                    LOGGER.info("indexSearch和query初始化失败,"+"IndexSearch:"+is+"  query:"+query);
                }
            } catch (ParseException e) {
                LOGGER.error("获取查询条件异常，异常信息:{}",e.getMessage());
            }catch (IOException e) {
                LOGGER.error("查询索引信息异常，异常信息：{}",e.getMessage());
            }
        }else{
            LOGGER.warn("reader is null 无法获取索引信息");
        }
        return docs;
    }

    public static void main(String[] args) {
        int [] nums=new int[]{5337424,
        8354699,
        5737071,
        6785709,
        5169227,
        4083041,
        4822605,
        4235623,
        3968948,
        3059084,
        3460965,
        6991442};
        int max=0;
        for (int num : nums) {
            max=max+num;
        }
        System.out.println(max);

    }

}