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javaAPI-Hbase异步之批量高效写入数据
2018-12-06 01:40:52 】 浏览:635
Tags:javaAPI-Hbase 异步 批量 高效 写入 数据

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package cn.ngsoc.hbase.util;

import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.filter.PageFilter;
import org.apache.hadoop.hbase.io.compress.Compression;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
import org.apache.hadoop.hbase.util.Bytes;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

/**
* HBase Util
* Created by babylon on 2018/07/26
*/
public class HBaseUtil {

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

private static Configuration conf;
private static Connection conn;

public static void init(String zkHost){
try {
if (conf == null) {
conf = HBaseConfiguration.create();
// conf.set("hbase.zookeeper.property.clientPort", ConfigUtil.getInstance().getConfigVal("zkport", ConstantProperties.COMMON_PROP));
conf.set("hbase.zookeeper.quorum", zkHost);
conf.set("zookeeper.znode.parent", "/hbase");
}
} catch (Exception e) {
logger.error("HBase Configuration Initialization failure !");
throw new RuntimeException(e) ;
}
}

/**
* 获取连接
* @return
*/
public static synchronized Connection getConnection() {
try {
if(conn == null || conn.isClosed()){
conn = ConnectionFactory.createConnection(conf);
}
// System.out.println("---------- " + conn.hashCode());
} catch (IOException e) {
logger.error("HBase 建立连接失败 ", e);
}
return conn;

}

/**
* 创建表
* @param tableName
* @throws Exception
*/
public static void createTable(String tableName, String[] columnFamilies, boolean preBuildRegion) throws Exception {
if(preBuildRegion){
String[] s = new String[] { "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F" };
int partition = 16;
byte[][] splitKeys = new byte[partition - 1][];
for (int i = 1; i < partition; i++) {
splitKeys[i - 1] = Bytes.toBytes(s[i - 1]);
}
createTable(tableName, columnFamilies, splitKeys);
} else {
createTable(tableName, columnFamilies);
}
}

private static void createTable(String tableName, int pNum, boolean only) throws Exception {
String[] s = RandCodeEnum.HBASE_CHAR.getHbaseKeys(pNum,2,only);
byte[][] splitKeys = new byte[pNum][];
for (int i = 1; i <= pNum; i++) {
splitKeys[i - 1] = Bytes.toBytes(s[i - 1]);
}
createTable(tableName, new String[] { "events" }, splitKeys);
}

/**
* 建表
* @param tableName
* @param cfs
* @throws IOException
*/
private static void createTable(String tableName, String[] cfs, byte[][] splitKeys) throws Exception {
Connection conn = getConnection();
HBaseAdmin admin = (HBaseAdmin) conn.getAdmin();
try {
if (admin.tableExists(tableName)) {
logger.warn("Table: {} is exists!", tableName);
return;
}
HTableDescriptor tableDesc = new HTableDescriptor(TableName.valueOf(tableName));
for (int i = 0; i < cfs.length; i++) {
HColumnDescriptor hColumnDescriptor = new HColumnDescriptor(cfs[i]);
hColumnDescriptor.setCompressionType(Compression.Algorithm.SNAPPY);
hColumnDescriptor.setMaxVersions(1);
tableDesc.addFamily(hColumnDescriptor);
}
admin.createTable(tableDesc, splitKeys);
logger.info("Table: {} create success!", tableName);
} finally {
admin.close();
closeConnect(conn);
}
}

/**
* 建表
* @param tableName
* @param cfs
* @throws IOException
*/
private static void createTable(String tableName, String[] cfs) throws Exception {
Connection conn = getConnection();
HBaseAdmin admin = (HBaseAdmin) conn.getAdmin();
try {
if (admin.tableExists(tableName)) {
logger.warn("Table: {} is exists!", tableName);
return;
}
HTableDescriptor tableDesc = new HTableDescriptor(TableName.valueOf(tableName));
for (int i = 0; i < cfs.length; i++) {
HColumnDescriptor hColumnDescriptor = new HColumnDescriptor(cfs[i]);
hColumnDescriptor.setCompressionType(Compression.Algorithm.SNAPPY);
hColumnDescriptor.setMaxVersions(1);
tableDesc.addFamily(hColumnDescriptor);
}
admin.createTable(tableDesc);
logger.info("Table: {} create success!", tableName);
} finally {
admin.close();
closeConnect(conn);
}
}

/**
* 删除表
* @param tablename
* @throws IOException
*/
public static void deleteTable(String tablename) throws IOException {
Connection conn = getConnection();
HBaseAdmin admin = (HBaseAdmin) conn.getAdmin();
try {
if (!admin.tableExists(tablename)) {
logger.warn("Table: {} is not exists!", tablename);
return;
}
admin.disableTable(tablename);
admin.deleteTable(tablename);
logger.info("Table: {} delete success!", tablename);
} finally {
admin.close();
closeConnect(conn);
}
}

/**
* 获取 Table
* @param tableName 表名
* @return
* @throws IOException
*/
public static Table getTable(String tableName){
try {
return getConnection().getTable(TableName.valueOf(tableName));
} catch (Exception e) {
logger.error("Obtain Table failure !", e);
}
return null;
}

/**
* 给 table 创建 snapshot
* @param snapshotName 快照名称
* @param tableName 表名
* @return
* @throws IOException
*/
public static void snapshot(String snapshotName, TableName tableName){
try {
Admin admin = getConnection().getAdmin();
admin.snapshot(snapshotName, tableName);
} catch (Exception e) {
logger.error("Snapshot " + snapshotName + " create failed !", e);
}
}

/**
* 获得现已有的快照
* @param snapshotNameRegex 正则过滤表达式
* @return
* @throws IOException
*/
public static List<HBaseProtos.SnapshotDescription> listSnapshots(String snapshotNameRegex){
try {
Admin admin = getConnection().getAdmin();
if(StringUtils.isNotBlank(snapshotNameRegex))
return admin.listSnapshots(snapshotNameRegex);
else
return admin.listSnapshots();
} catch (Exception e) {
logger.error("Snapshot " + snapshotNameRegex + " get failed !", e);
}
return null;
}

/**
* 批量删除Snapshot
* @param snapshotNameRegex 正则过滤表达式
* @return
* @throws IOException
*/
public static void deleteSnapshots(String snapshotNameRegex){
try {
Admin admin = getConnection().getAdmin();
if(StringUtils.isNotBlank(snapshotNameRegex))
admin.deleteSnapshots(snapshotNameRegex);
else
logger.error("SnapshotNameRegex can't be null !");
} catch (Exception e) {
logger.error("Snapshots " + snapshotNameRegex + " del failed !", e);
}
}

/**
* 单个删除Snapshot
* @param snapshotName 正则过滤表达式
* @return
* @throws IOException
*/
public static void deleteSnapshot(String snapshotName){
try {
Admin admin = getConnection().getAdmin();
if(StringUtils.isNotBlank(snapshotName))
admin.deleteSnapshot(snapshotName);
else
logger.error("SnapshotName can't be null !");
} catch (Exception e) {
logger.error("Snapshot " + snapshotName + " del failed !", e);
}
}

/**
* 分页检索表数据。<br>
* (如果在创建表时为此表指定了非默认的命名空间,则需拼写上命名空间名称,格式为【namespace:tablename】)。
* @param tableName 表名称(*)。
* @param startRowKey 起始行键(可以为空,如果为空,则从表中第一行开始检索)。
* @param endRowKey 结束行键(可以为空)。
* @param filterList 检索条件过滤器集合(不包含分页过滤器;可以为空)。
* @param maxVersions 指定最大版本数【如果为最大整数值,则检索所有版本;如果为最小整数值,则检索最新版本;否则只检索指定的版本数】。
* @param pageModel 分页模型(*)。
* @return 返回HBasePageModel分页对象。
*/
public static HBasePageModel scanResultByPageFilter(String tableName, byte[] startRowKey, byte[] endRowKey, FilterList filterList, int maxVersions, HBasePageModel pageModel) {
if(pageModel == null) {
pageModel = new HBasePageModel(10);
}
if(maxVersions <= 0 ) {
//默认只检索数据的最新版本
maxVersions = Integer.MIN_VALUE;
}
pageModel.initStartTime();
pageModel.initEndTime();
if(StringUtils.isBlank(tableName)) {
return pageModel;
}
Table table = null;

try {
table = getTable(tableName);
int tempPageSize = pageModel.getPageSize();
boolean isEmptyStartRowKey = false;
if(startRowKey == null) {
//则读取表的第一行记录
Result firstResult = selectFirstResultRow(tableName, filterList);
if(firstResult.isEmpty()) {
return pageModel;
}
startRowKey = firstResult.getRow();
}
if(pageModel.getPageStartRowKey() == null) {
isEmptyStartRowKey = true;
pageModel.setPageStartRowKey(startRowKey);
} else {
if(pageModel.getPageEndRowKey() != null) {
pageModel.setPageStartRowKey(pageModel.getPageEndRowKey());
}
//从第二页开始,每次都多取一条记录,因为第一条记录是要删除的。
tempPageSize += 1;
}

Scan scan = new Scan();
scan.setStartRow(pageModel.getPageStartRowKey());
if(endRowKey != null) {
scan.setStopRow(endRowKey);
}
PageFilter pageFilter = new PageFilter(pageModel.getPageSize() + 1);
if(filterList != null) {
filterList.addFilter(pageFilter);
scan.setFilter(filterList);
} else {
scan.setFilter(pageFilter);
}
if(maxVersions == Integer.MAX_VALUE) {
scan.setMaxVersions();
} else if(maxVersions == Integer.MIN_VALUE) {

} else {
scan.setMaxVersions(maxVersions);
}
ResultScanner scanner = table.getScanner(scan);
List<Result> resultList = new ArrayList<Result>();
int index = 0;
for(Result rs : scanner.next(tempPageSize)) {
if(isEmptyStartRowKey == false && index == 0) {
index += 1;
continue;
}
if(!rs.isEmpty()) {
resultList.add(rs);
}
index += 1;
}
scanner.close();
pageModel.setResultList(resultList);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
table.close();
} catch (IOException e) {
e.printStackTrace();
}
}

int pageIndex = pageModel.getPageIndex() + 1;
pageModel.setPageIndex(pageIndex);
if(pageModel.getResultList().size() > 0) {
//获取本次分页数据首行和末行的行键信息
byte[] pageStartRowKey = pageModel.getResultList().get(0).getRow();
byte[] pageEndRowKey = pageModel.getResultList().get(pageModel.getResultList().size() - 1).getRow();
pageModel.setPageStartRowKey(pageStartRowKey);
pageModel.setPageEndRowKey(pageEndRowKey);
}
int queryTotalCount = pageModel.getQueryTotalCount() + pageModel.getResultList().size();
pageModel.setQueryTotalCount(queryTotalCount);
pageModel.initEndTime();
pageModel.printTimeInfo();
return pageModel;
}

/**
* 检索指定表的第一行记录。<br>
* (如果在创建表时为此表指定了非默认的命名空间,则需拼写上命名空间名称,格式为【namespace:tablename】)。
* @param tableName 表名称(*)。
* @param filterList 过滤器集合,可以为null。
* @return
*/
public static Result selectFirstResultRow(String tableName,FilterList filterList) {
if(StringUtils.isBlank(tableName)) return null;
Table table = null;
try {
table = getTable(tableName);
Scan scan = new Scan();
if(filterList != null) {
scan.setFilter(filterList);
}
ResultScanner scanner = table.getScanner(scan);
Iterator<Result> iterator = scanner.iterator();
int index = 0;
while(iterator.hasNext()) {
Result rs = iterator.next();
if(index == 0) {
scanner.close();
return rs;
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
table.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}

/**
* 异步往指定表添加数据
* @param tablename 表名
* @param puts 需要添加的数据
* @return long 返回执行时间
* @throws IOException
*/
public static long put(String tablename, List<SocPut> puts) throws Exception {
long currentTime = System.currentTimeMillis();
Connection conn = getConnection();
final BufferedMutator.ExceptionListener listener = new BufferedMutator.ExceptionListener() {
@Override
public void onException(RetriesExhaustedWithDetailsException e, BufferedMutator mutator) {
for (int i = 0; i < e.getNumExceptions(); i++) {
System.out.println("Failed to sent put " + e.getRow(i) + ".");
logger.error("Failed to sent put " + e.getRow(i) + ".");
}
}
};
BufferedMutatorParams params = new BufferedMutatorParams(TableName.valueOf(tablename))
.listener(listener);
params.writeBufferSize(5 * 1024 * 1024);

final BufferedMutator mutator = conn.getBufferedMutator(params);
try {
mutator.mutate(puts);
mutator.flush();
} finally {
mutator.close();
closeConnect(conn);
}
return System.currentTimeMillis() - currentTime;
}

/**
* 异步往指定表添加数据
* @param tablename 表名
* @param put 需要添加的数据
* @return long 返回执行时间
* @throws IOException
*/
public static long put(String tablename, SocPut put) throws Exception {
return put(tablename, Arrays.asList(put));
}

/**
* 往指定表添加数据
* @param tablename 表名
* @param puts 需要添加的数据
* @return long 返回执行时间
* @throws IOException
*/
public static long putByHTable(String tablename, List<> puts) throws Exception {
long currentTime = System.currentTimeMillis();
Connection conn = getConnection();
HTable htable = (HTable) conn.getTable(TableName.valueOf(tablename));
htable.setAutoFlushTo(false);
htable.setWriteBufferSize(5 * 1024 * 1024);
try {
htable.put((List<Put>)puts);
htable.flushCommits();
} finally {
htable.close();
closeConnect(conn);
}
return System.currentTimeMillis() - currentTime;
}

/**
* 删除单条数据
* @param tablename
* @param row
* @throws IOException
*/
public static void delete(String tablename, String row) throws IOException {
Table table = getTable(tablename);
if(table!=null){
try {
Delete d = new Delete(row.getBytes());
table.delete(d);
} finally {
table.close();
}
}
}

/**
* 删除多行数据
* @param tablename
* @param rows
* @throws IOException
*/
public static void delete(String tablename, String[] rows) throws IOException {
Table table = getTable(tablename);
if (table != null) {
try {
List<Delete> list = new ArrayList<Delete>();
for (String row : rows) {
Delete d = new Delete(row.getBytes());
list.add(d);
}
if (list.size() > 0) {
table.delete(list);
}
} finally {
table.close();
}
}
}

/**
* 关闭连接
* @throws IOException
*/
public static void closeConnect(Connection conn){
if(null != conn){
try {
// conn.close();
} catch (Exception e) {
logger.error("closeConnect failure !", e);
}
}
}

/**
* 获取单条数据
* @param tablename
* @param row
* @return
* @throws IOException
*/
public static Result getRow(String tablename, byte[] row) {
Table table = getTable(tablename);
Result rs = null;
if(table!=null){
try{
Get g = new Get(row);
rs = table.get(g);
} catch (IOException e) {
logger.error("getRow failure !", e);
} finally{
try {
table.close();
} catch (IOException e) {
logger.error("getRow failure !", e);
}
}
}
return rs;
}

/**
* 获取多行数据
* @param tablename
* @param rows
* @return
* @throws Exception
*/
public static <T> Result[] getRows(String tablename, List<T> rows) {
Table table = getTable(tablename);
List<Get> gets = null;
Result[] results = null;
try {
if (table != null) {
gets = new ArrayList<Get>();
for (T row : rows) {
if(row!=null){
gets.add(new Get(Bytes.toBytes(String.valueOf(row))));
}else{
throw new RuntimeException("hbase have no data");
}
}
}
if (gets.size() > 0) {
results = table.get(gets);
}
} catch (IOException e) {
logger.error("getRows failure !", e);
} finally {
try {
table.close();
} catch (IOException e) {
logger.error("table.close() failure !", e);
}
}
return results;
}

/**
* 扫描整张表,注意使用完要释放。
* @param tablename
* @return
* @throws IOException
*/
public static ResultScanner get(String tablename) {
Table table = getTable(tablename);
ResultScanner results = null;
if (table != null) {
try {
Scan scan = new Scan();
scan.setCaching(1000);
results = table.getScanner(scan);
} catch (IOException e) {
logger.error("getResultScanner failure !", e);
} finally {
try {
table.close();
} catch (IOException e) {
logger.error("table.close() failure !", e);
}
}
}
return results;
}

/**
* 格式化输出结果
*/
public static void formatRow(KeyValue[] rs){
for(KeyValue kv : rs){
System.out.println(" column family : " + Bytes.toString(kv.getFamily()));
System.out.println(" column : " + Bytes.toString(kv.getQualifier()));
System.out.println(" value : " + Bytes.toString(kv.getValue()));
System.out.println(" timestamp : " + String.valueOf(kv.getTimestamp()));
System.out.println("--------------------");
}
}

/**
* byte[] 类型的长整形数字转换成 long 类型
* @param byteNum
* @return
*/
public static long bytes2Long(byte[] byteNum) {
long num = 0;
for (int ix = 0; ix < 8; ++ix) {
num <<= 8;
num |= (byteNum[ix] & 0xff);
}
return num;
}

}


javaAPI-Hbase异步之批量高效写入数据 https://www.cppentry.com/bencandy.php?fid=118&id=195159

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