hbase使用MapReduce操作2（微博表实现）

package com.yjsj.weibo;

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

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.NamespaceDescriptor;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.filter.CompareFilter;
import org.apache.hadoop.hbase.filter.RowFilter;
import org.apache.hadoop.hbase.filter.SubstringComparator;
import org.apache.hadoop.hbase.util.Bytes;

/**
 * 发布微博
 * 互粉
 * 取关
 * 查看微博
 * @author Z
 *
 */
public class WeiBo {
    //HBase的配置对象
    private Configuration conf = HBaseConfiguration.create();
    
    //创建weibo这个业务的命名空间，3张表
    private static final byte[] NS_WEIBO = Bytes.toBytes("ns_weibo");
    private static final byte[] TABLE_CONTENT = Bytes.toBytes("ns_weibo:content");
    private static final byte[] TABLE_RELATION = Bytes.toBytes("ns_weibo:relation");
    private static final byte[] TABLE_INBOX = Bytes.toBytes("ns_weibo:inbox");
    public WeiBo(){
        conf.set("hbase.zookeeper.quorum", "master,node1,node2");
        conf.set("hbase.zookeeper.property.clientPort", "2181");
        conf.set("hbase.master", "master:60000");
    }
    private void init() throws IOException{
        //创建微博业务命名空间
        initNamespace();
        //创建微博内容表
        initTableContent();
        //创建用户关系表
        initTableRelation();
        //创建收件箱表
        initTableInbox();
    }
    
    //创建微博业务命名空间
    private void initNamespace() throws IOException {
        //Connection connection = ConnectionFactory.createConnection(conf);
        //conf = HBaseConfiguration.create();
        conf.set("hbase.zookeeper.quorum", "master,node1,node2");
        conf.set("hbase.zookeeper.property.clientPort", "2181");
        conf.set("hbase.master", "master:60000");

        Connection connection = ConnectionFactory.createConnection(conf);
        Admin admin = connection.getAdmin();
        //创建命名空间描述器
        NamespaceDescriptor ns_weibo = NamespaceDescriptor
                .create("ns_weibo")
                .addConfiguration("creator", "JinJI")
                .addConfiguration("create_time", String.valueOf(System.currentTimeMillis()))
                .build();
        admin.createNamespace(ns_weibo);
        admin.close();
        connection.close();
    }
    
    /**
     * 表名：ns_weibo:content
     * 列族名：info
     * 列名：content
     * rowkey:用户id_时间戳
     * value:微博内容（文字内容，图片URL，视频URL，语音URL）
     * versions:1
     * @throws IOException
     */
    private void initTableContent() throws IOException {
        Connection connection = ConnectionFactory.createConnection(conf);
        Admin admin = connection.getAdmin();
        
        //创建表描述器
        HTableDescriptor contentTableDescriptor = new HTableDescriptor(TableName.valueOf(TABLE_CONTENT));
        //创建列描述器
        HColumnDescriptor infoColumnDescriptor = new HColumnDescriptor("info");
        //设置块缓存
        infoColumnDescriptor.setBlockCacheEnabled(true);
        //设置块缓存大小 2M
        infoColumnDescriptor.setBlocksize(2 * 1024 * 1024);
        //设置版本确界
        infoColumnDescriptor.setMinVersions(1);
        infoColumnDescriptor.setMaxVersions(1);
        
        //将列描述器添加到表描述器中
        contentTableDescriptor.addFamily(infoColumnDescriptor);
        //创建表
        admin.createTable(contentTableDescriptor);
        admin.close();
        connection.close();
    }
    /**
     * 表名：ns_weibo:relation
     * 列族名：attends，fans
     * 列名：用户id
     * value：用户id
     * rowkey：当前操作人的用户id
     * versions:1
     * @throws IOException
     */
    private void initTableRelation() throws IOException {
        Connection connection = ConnectionFactory.createConnection(conf);
        Admin admin = connection.getAdmin();
        //创建用户关系表描述器
        HTableDescriptor relationTableDescriptor = new HTableDescriptor(TableName.valueOf(TABLE_RELATION));
        
        //创建attends列描述器
        HColumnDescriptor attendsColumnDescriptor = new HColumnDescriptor("attends");
        //设置块缓存
        attendsColumnDescriptor.setBlockCacheEnabled(true);
        //设置块缓存大小 2M
        attendsColumnDescriptor.setBlocksize(2 * 1024 * 1024);
        //设置版本
        attendsColumnDescriptor.setMinVersions(1);
        attendsColumnDescriptor.setMaxVersions(1);
                
        //创建fans列描述器
        HColumnDescriptor fansColumnDescriptor = new HColumnDescriptor("fans");
        //设置块缓存
        fansColumnDescriptor.setBlockCacheEnabled(true);
        //设置块缓存大小 2M
        fansColumnDescriptor.setBlocksize(2 * 1024 * 1024);
        //设置版本
        fansColumnDescriptor.setMinVersions(1);
        fansColumnDescriptor.setMaxVersions(1);
        
        //将两个列描述器添加到表描述器中
        relationTableDescriptor.addFamily(attendsColumnDescriptor);
        relationTableDescriptor.addFamily(fansColumnDescriptor);
        
        //创建表
        admin.createTable(relationTableDescriptor);
        admin.close();
        connection.close();
    }
    
    /**
     * 表名：ns_weibo:inbox
     * 列族：info
     * 列：当前用户所关注的人的用户id
     * value：微博rowkey
     * rowkey：用户id
     * versions:100
     * @throws IOException
     */
    private void initTableInbox() throws IOException {
        Connection connection = ConnectionFactory.createConnection(conf);
        Admin admin = connection.getAdmin();
        
        HTableDescriptor inboxTableDescriptor = new HTableDescriptor(TableName.valueOf(TABLE_INBOX));
        HColumnDescriptor infoColumnDescriptor = new HColumnDescriptor("info");
        //设置块缓存
        infoColumnDescriptor.setBlockCacheEnabled(true);
        //设置块缓存大小 2M
        infoColumnDescriptor.setBlocksize(2 * 1024 * 1024);
        //设置版本
        infoColumnDescriptor.setMinVersions(100);
        infoColumnDescriptor.setMaxVersions(100);
        
        inboxTableDescriptor.addFamily(infoColumnDescriptor);
        admin.createTable(inboxTableDescriptor);
        admin.close();
        connection.close();
    }

    /**
     * 发布微博
     * a、向微博内容表中添加刚发布的内容，多了一个微博rowkey
     * b、向发布微博人的粉丝的收件箱表中，添加该微博rowkey
     * @throws IOException
     */
    public void publishContent(String uid, String content) throws IOException{
        Connection connection = ConnectionFactory.createConnection(conf);
        //得到微博表对象
        Table contentTable = connection.getTable(TableName.valueOf(TABLE_CONTENT));
        //a
        //组装rowkey
        long ts = System.currentTimeMillis();
        String rowkey = uid + "_" + ts;
        //添加微博内容到微博表
        Put contentPut = new Put(Bytes.toBytes(rowkey));
        contentPut.addColumn(Bytes.toBytes("info"), Bytes.toBytes("content"), Bytes.toBytes(content));
        contentTable.put(contentPut);
        //b
        //查询用户关系表，得到当前用户的fans用户id
        Table relationTable = connection.getTable(TableName.valueOf(TABLE_RELATION));
        //获取粉丝的用户id
        Get get = new Get(Bytes.toBytes(uid));
        get.addFamily(Bytes.toBytes("fans"));
        
        //先取出所有fans的用户id，存放于一个集合之中
        List<byte[]> fans = new ArrayList<>();
        
        Result result = relationTable.get(get);
        Cell[] cells = result.rawCells();
        for(Cell cell: cells){
            //取出当前用户所有的粉丝uid
            fans.add(CellUtil.cloneValue(cell));
        }
        
        //如果没有粉丝，则不需要操作粉丝的收件箱表
        if(fans.size() <= 0) return;
        
        //开始操作收件箱表
        Table inboxTable = connection.getTable(TableName.valueOf(TABLE_INBOX));
        
        //封装用于操作粉丝收件箱表的Put对象集合
        List<Put> puts = new ArrayList<>();
        for(byte[] fansRowKey : fans){
            Put inboxPut = new Put(fansRowKey);
            inboxPut.addColumn(Bytes.toBytes("info"), Bytes.toBytes(uid), ts, Bytes.toBytes(rowkey));
            puts.add(inboxPut);
        }
        //向收件箱表放置数据
        inboxTable.put(puts);
        
        //关闭表与连接器，释放资源
        inboxTable.close();
        relationTable.close();
        contentTable.close();
        connection.close();
    }
    
    /**
     * a、在用户关系表中，对当前主动操作的用户id进行添加关注的操作
     * b、在用户关系表中，对被关注的人的用户id，添加粉丝操作
     * c、对当前操作的用户的收件箱表中，添加他所关注的人的最近的微博rowkey
     * //@param args
     * @throws IOException
     */
    public void addAttends(String uid, String... attends) throws IOException{
        //参数过滤:如果没有传递关注的人的uid，则直接返回
        if(attends == null || attends.length <= 0 || uid == null) return;
        //a
        Connection connection = ConnectionFactory.createConnection(conf);
        Table relationTable = connection.getTable(TableName.valueOf(TABLE_RELATION));
        List<Put> puts = new ArrayList<>();
        //在微博用户关系表中，添加新关注的好友
        Put attendPut = new Put(Bytes.toBytes(uid));
        for(String attend: attends){
            //为当前用户添加关注人
            attendPut.addColumn(Bytes.toBytes("attends"), Bytes.toBytes(attend), Bytes.toBytes(attend));
            //b 
            //被关注的人，添加粉丝（uid）
            Put fansPut = new Put(Bytes.toBytes(attend));
            fansPut.addColumn(Bytes.toBytes("fans"), Bytes.toBytes(uid), Bytes.toBytes(uid));
            puts.add(fansPut);
        }
        puts.add(attendPut);
        relationTable.put(puts);
        //c
        //取得微博内容表
        Table contentTable = connection.getTable(TableName.valueOf(TABLE_CONTENT));
        Scan scan = new Scan();
        //用于存放扫描出来的我所关注的人的微博rowkey
        List<byte[]> rowkeys = new ArrayList<>();
        
        for(String attend: attends){
            //1002_152321283837374
            //扫描微博rowkey，使用rowfilter过滤器
            RowFilter filter = new RowFilter(CompareFilter.CompareOp.EQUAL, new SubstringComparator(attend + "_"));
            scan.setFilter(filter);
            //通过该scan扫描结果
            ResultScanner resultScanner = contentTable.getScanner(scan);
            Iterator<Result> iterator = resultScanner.iterator();
            while(iterator.hasNext()){
                Result result = iterator.next();
                rowkeys.add(result.getRow());
            }
        }
        //将取出的微博rowkey放置于当前操作的这个用户的收件箱表中
        //如果所关注的人，没有一条微博，则直接返回
        if(rowkeys.size() <= 0) return;
        
        //操作inboxTable
        Table inboxTable = connection.getTable(TableName.valueOf(TABLE_INBOX));
        Put inboxPut = new Put(Bytes.toBytes(uid));
        for(byte[] rowkey: rowkeys){
            String rowkeyString = Bytes.toString(rowkey);
            String attendUID = rowkeyString.split("_")[0];
            String attendWeiboTS = rowkeyString.split("_")[1];
            inboxPut.addColumn(Bytes.toBytes("info"), Bytes.toBytes(attendUID), Long.valueOf(attendWeiboTS), rowkey);
        }
        inboxTable.put(inboxPut);
        
        //关闭，释放资源
        inboxTable.close();
        contentTable.close();
        relationTable.close();
        connection.close();
    }
    
    /**
     * a、在用户关系表中，删除你要取关的那个人的用户id
     * b、在用户关系表中，删除被你取关的那个人的粉丝中的当前操作用户id
     * c、删除微博收件箱表中你取关的人所发布的微博的rowkey
     * 取关操作
     * @throws IOException
     */
    public void removeAttends(String uid, String... attends) throws IOException{
        //参数过滤:如果没有传递关注的人的uid，则直接返回
        if(attends == null || attends.length <= 0 || uid == null) return;
        
        Connection connection = ConnectionFactory.createConnection(conf);
        //a
        //得到用户关系表
        Table relationTable = connection.getTable(TableName.valueOf(TABLE_RELATION));
        Delete attendDelete = new Delete(Bytes.toBytes(uid));
        List<Delete> deletes = new ArrayList<>();
        for(String attend: attends){
            //b 在对面用户关系表中移除粉丝
            attendDelete.addColumn(Bytes.toBytes("attends"), Bytes.toBytes(attend));
            Delete delete = new Delete(Bytes.toBytes(attend));
            delete.addColumn(Bytes.toBytes("fans"), Bytes.toBytes("uid"));
            deletes.add(delete);
        }
        deletes.add(attendDelete);
        relationTable.delete(deletes);
        
        //c
        Table inboxTable = connection.getTable(TableName.valueOf(TABLE_INBOX));
        
        Delete delete = new Delete(Bytes.toBytes(uid));
        for(String attend: attends){
            delete.addColumns(Bytes.toBytes("info"), Bytes.toBytes(attend));
        }
        inboxTable.delete(delete);
        
        //释放资源
        inboxTable.close();
        relationTable.close();
        connection.close();
    }
    
    /**
     * 查看微博内容
     * a、从微博收件箱中获取所有关注的人发布的微博的微博rowkey
     * b、根据得到的微博rowkey，去微博内容表中得到数据
     * c、将取出的数据解码然后封装到Message对象中
     * @throws IOException
     */
    public List<Message> getAttendsContent(String uid) throws IOException{
        //a
        Connection connection = ConnectionFactory.createConnection(conf);
        Table inboxTable = connection.getTable(TableName.valueOf(TABLE_INBOX));
        //从收件箱表中获取微博rowkey
        Get inboxGet = new Get(Bytes.toBytes(uid));
        inboxGet.addFamily(Bytes.toBytes("info"));
        //每个Cell中存储了100个版本，我们只取出最新的5个版本
        inboxGet.setMaxVersions(5);
        
        Result inboxResult = inboxTable.get(inboxGet);
        //准备一个存放所有微博rowkey的集合
        List<byte[]> rowkeys = new ArrayList<>();
        Cell[] inboxCells = inboxResult.rawCells();
        //组装rowkes集合
        for(Cell cell: inboxCells){
            rowkeys.add(CellUtil.cloneValue(cell));
        }
        
        //b
        //根据微博rowkeys，去内容表中取得微博实际内容的数据
        Table contentTable = connection.getTable(TableName.valueOf(TABLE_CONTENT));
        //用于批量获取所有微博数据
        List<Get> contentGets = new ArrayList<>();
        for(byte[] rowkey: rowkeys){
            Get contentGet = new Get(rowkey);
            contentGets.add(contentGet);
        }
        //所有的结果数据
        List<Message> messages = new ArrayList<>();
        Result[] contentResults = contentTable.get(contentGets);
        for(Result r: contentResults){
            Cell[] cs = r.rawCells();
            for(Cell c: cs){
                //取得contentTable中的rowkey
                String rk = Bytes.toString(r.getRow());
                //发布微博人的UID
                String publishUID = rk.split("_")[0];
                long publishTS = Long.valueOf(rk.split("_")[1]);
                
                Message msg = new Message();
                msg.setUid(publishUID);
                msg.setTimestamp(publishTS);
                msg.setContent(Bytes.toString(CellUtil.cloneValue(c)));
                
                messages.add(msg);
            }
        }
        
        contentTable.close();
        inboxTable.close();
        connection.close();
        
        return messages;
    }
    
    /**
     * 测试用例
     * //@param args
     * @throws IOException
     */
    
    //发布微博
    public static void publishWeiBoTest(WeiBo weiBo, String uid, String content) throws IOException{
        weiBo.publishContent(uid, content);
    }
    //关注
    public static void addAttendTest(WeiBo weiBo, String uid, String... attends) throws IOException{
        weiBo.addAttends(uid, attends);
    }
    //取关
    public static void removeAttendTest (WeiBo weiBo, String uid, String... attends) throws IOException{
        weiBo.removeAttends(uid, attends);
    }
    
    //刷微博
    public static void scanWeiBoContentTest(WeiBo weiBo, String uid) throws IOException{
        List<Message> list = weiBo.getAttendsContent(uid);
        System.out.println(list);
    }
    
    
    public static void main(String[] args) throws IOException {
        WeiBo wb = new WeiBo();
        //wb.init();
        
        //publishWeiBoTest(wb, "1002", "哦，我的上帝，我要踢爆他的屁股");
        /*
        publishWeiBoTest(wb, "1002", "哦，我的上帝，我还要踢爆他的屁股");
        publishWeiBoTest(wb, "1002", "哦，我的上帝，我非要踢爆他的屁股");
        publishWeiBoTest(wb, "1003", "哦，我的上帝，我也要踢爆他的屁股");
        */
        //addAttendTest(wb, "1001", "1002", "1003");
        //removeAttendTest(wb, "1001", "1002");
        //scanWeiBoContentTest(wb, "1001");
    /*
        addAttendTest(wb, "1003", "1002", "1001");
        scanWeiBoContentTest(wb, "1003");
        
        publishWeiBoTest(wb, "1001", "嘿嘿嘿11");
        publishWeiBoTest(wb, "1001", "嘿嘿嘿22");
        publishWeiBoTest(wb, "1001", "嘿嘿嘿33");
        publishWeiBoTest(wb, "1001", "嘿嘿嘿44");
        publishWeiBoTest(wb, "1001", "嘿嘿嘿55");
        publishWeiBoTest(wb, "1001", "嘿嘿嘿66");
        scanWeiBoContentTest(wb, "1003");
        */
    }
}