HBase的Thrift API定义,可以通过链接 http://svn.apache.org/viewvc/hbase/trunk/hbase-server/src/main/resources/org/apache/hadoop/hbase/thrift/Hbase.thrift?view=markup看到,我们需要安装Thrift编译器,才能生成HBase跨语言的API。
首先下载上面链接的内容,保存为Hbase.thrift。
然后,执行如下命令,生成不同编程语言的HBase API:
01 |
[hadoop@master hbase]$ thrift --gen cpp Hbase.thrift |
02 |
[hadoop@master hbase]$ thrift --gen java Hbase.thrift |
03 |
[hadoop@master hbase]$ thrift --gen py Hbase.thrift |
04 |
[hadoop@master hbase]$ thrift --gen perl Hbase.thrift |
05 |
[hadoop@master hbase]$ thrift --gen csharp Hbase.thrift |
06 |
[hadoop@master hbase]$ thrift --gen php Hbase.thrift |
07 |
[hadoop@master hbase]$ thrift --gen js Hbase.thrift |
08 |
[hadoop@master hbase]$ thrift --gen go Hbase.thrift |
09 |
[hadoop@master hbase]$ thrift --gen erl Hbase.thrift |
10 |
[hadoop@master hbase]$ thrift --gen delphi Hbase.thrift |
11 |
[hadoop@master hbase]$ thrift --gen hs Hbase.thrift |
12 |
[hadoop@master hbase]$ thrift --gen html Hbase.thrift |
13 |
[hadoop@master hbase]$ thrift --gen c_glib Hbase.thrift |
14 |
[hadoop@master hbase]$ thrift --gen cocoa Hbase.thrift |
15 |
[hadoop@master hbase]$ thrift --gen rb Hbase.thrift |
16 |
[hadoop@master hbase]$ thrift --gen st Hbase.thrift |
17 |
[hadoop@master hbase]$ thrift --gen xsd Hbase.thrift |
18 |
[hadoop@master hbase]$ ls
|
19 |
gen-as3 gen-cocoa gen-csharp gen-erl gen-hs gen-java gen-perl gen-py gen-st Hbase.thrift |
20 |
gen-c_glib gen-cpp gen-delphi gen-go gen-html gen-js gen-php gen-rb gen-xsd |
这里,我们基于Java语言,使用HBase 的Thrift 客户端API访问HBase表。事实上,如果使用Java来实现对HBase表的操作,最好是使用HBase的原生API,无论从性能还是便利性方面,都会提供更好的体验。使用Thrift API访问,实际也是在HBase API之上进行了一层封装,可能初次使用Thrift API感觉很别扭,有时候还要参考Thrift服务端的实现代码。
准备工作如下:
-
- 下载Thrift软件包,解压缩后,拷贝thrift-0.9.0/lib/java/src下面的代码到工作区(开发工具中)
- 将上面生成的gen-java目录中代码拷贝到工作区
- 保证HBase集群正常运行,接着启动HBase的Thrift服务,执行如下命令:
1 |
bin/hbase thrift -b master -p 9090 start |
上面,HBase的Thrift服务端口为9090,下面通过Thrift API访问的时候,需要用到,而不是HBase的服务端口(默认60000)。
接着,实现一个简单的例子,访问Hbase表。
首先,我们通过HBase Shell创建一个表:
1 |
create 'test_info' , 'info'
|
表名为test_info,列簇名称为info。
然后,我们开始基于上面生成的Thrift代码来实现对HBase表的操作。
我们在客户端,进行了一层抽象,更加便于传递各种参数,抽象类为AbstractHBaseThriftService,代码如下所示:
01 |
package org.shirdrn.cloud.hbase.thrift;
|
03 |
import java.util.List;
|
06 |
import org.apache.hadoop.hbase.thrift.generated.Hbase;
|
07 |
import org.apache.hadoop.hbase.thrift.generated.TRowResult;
|
08 |
import org.apache.thrift.TException;
|
09 |
import org.apache.thrift.protocol.TBinaryProtocol;
|
10 |
import org.apache.thrift.protocol.TProtocol;
|
11 |
import org.apache.thrift.transport.TSocket;
|
12 |
import org.apache.thrift.transport.TTransport;
|
13 |
import org.apache.thrift.transport.TTransportException;
|
15 |
public abstract class AbstractHBaseThriftService {
|
17 |
protected static final String CHARSET = "UTF-8" ;
|
18 |
private String host = "localhost" ;
|
19 |
private int port = 9090 ;
|
20 |
private final TTransport transport;
|
21 |
protected final Hbase.Client client;
|
23 |
public AbstractHBaseThriftService() {
|
24 |
transport = new TSocket(host, port);
|
25 |
TProtocol protocol = new TBinaryProtocol(transport, true , true );
|
26 |
client = new Hbase.Client(protocol);
|
29 |
public AbstractHBaseThriftService(String host, int port) {
|
31 |
transport = new TSocket(host, port);
|
32 |
TProtocol protocol = new TBinaryProtocol(transport, true , true );
|
33 |
client = new Hbase.Client(protocol);
|
36 |
public void open() throws TTransportException {
|
37 |
if (transport != null ) {
|
43 |
if (transport != null ) {
|
48 |
public abstract List<String> getTables() throws TException;
|
50 |
public abstract void update(String table, String rowKey, boolean writeToWal,
|
51 |
String fieldName, String fieldValue, Map<String, String> attributes) throws TException;
|
52 |
public abstract void update(String table, String rowKey, boolean writeToWal,
|
53 |
Map<String, String> fieldNameValues, Map<String, String> attributes) throws TException;
|
55 |
public abstract void deleteCell(String table, String rowKey, boolean writeToWal,
|
56 |
String column, Map<String, String> attributes) throws TException;
|
57 |
public abstract void deleteCells(String table, String rowKey, boolean writeToWal,
|
58 |
List<String> columns, Map<String, String> attributes) throws TException;
|
60 |
public abstract void deleteRow(String table, String rowKey,
|
61 |
Map<String, String> attributes) throws TException;
|
63 |
public abstract int scannerOpen(String table, String startRow, List<String> columns,
|
64 |
Map<String, String> attributes) throws TException;
|
65 |
public abstract int scannerOpen(String table, String startRow, String stopRow, List<String> columns,
|
66 |
Map<String, String> attributes) throws TException;
|
67 |
public abstract int scannerOpenWithPrefix(String table, String startAndPrefix,
|
68 |
List<String> columns, Map<String, String> attributes) throws TException;
|
69 |
public abstract int scannerOpenTs(String table, String startRow,
|
70 |
List<String> columns, long timestamp, Map<String, String> attributes) throws TException;
|
71 |
public abstract int scannerOpenTs(String table, String startRow, String stopRow,
|
72 |
List<String> columns, long timestamp, Map<String, String> attributes) throws TException;
|
74 |
public abstract List<TRowResult> scannerGetList( int id, int nbRows) throws TException;
|
75 |
public abstract List<TRowResult> scannerGet( int id) throws TException;
|
77 |
public abstract List<TRowResult> getRow(String table, String row,
|
78 |
Map<String, String> attributes) throws TException;
|
79 |
public abstract List<TRowResult> getRows(String table,
|
80 |
List<String> rows, Map<String, String> attributes) throws TException;
|
81 |
public abstract List<TRowResult> getRowsWithColumns(String table,
|
82 |
List<String> rows, List<String> columns, Map<String, String> attributes) throws TException;
|
84 |
public abstract void scannerClose( int id) throws TException;
|
87 |
* Iterate result rows(just for test purpose)
|
90 |
public abstract void iterateResults(TRowResult result);
|
这里,简单叙述一下,我们提供的客户端API的基本功能:
- 建立到Thrift服务的连接:open()
- 获取到HBase中的所有表名:getTables()
- 更新HBase表记录:update()
- 删除HBase表中一行的记录的数据(cell):deleteCell()和deleCells()
- 删除HBase表中一行记录:deleteRow()
- 打开一个Scanner,返回id:scannerOpen()、scannerOpenWithPrefix()和scannerOpenTs();然后用返回的id迭代记录:scannerGetList()和scannerGet()
- 获取一行记录结果:getRow()、getRows()和getRowsWithColumns()
- 关闭一个Scanner:scannerClose()
- 迭代结果,用于调试:iterateResults()
比如,我们想要实现分页的逻辑,可能和传统的关系型数据库操作有些不同。基于HBase表的实现是,首先打开一个Scanner实例(例如调用scannerOpen()),返回一个id,然后再使用该id,调用scannerGetList()方法(可以指定每次返回几条记录的变量nbRows的值),返回一个记录列表,反复调用该scannerGetList()方法,直到此次没有结果返回为止。后面会通过测试用例来实际体会。
现在,我们基于上抽象出来的客户端操作接口,给出一个基本的实现,代码如下所示:
001 |
package org.shirdrn.cloud.hbase.thrift;
|
003 |
import java.io.UnsupportedEncodingException;
|
004 |
import java.nio.ByteBuffer;
|
005 |
import java.util.ArrayList;
|
006 |
import java.util.HashMap;
|
007 |
import java.util.Iterator;
|
008 |
import java.util.List;
|
009 |
import java.util.Map;
|
010 |
import java.util.Map.Entry;
|
012 |
import org.apache.hadoop.hbase.thrift.generated.IOError;
|
013 |
import org.apache.hadoop.hbase.thrift.generated.Mutation;
|
014 |
import org.apache.hadoop.hbase.thrift.generated.TCell;
|
015 |
import org.apache.hadoop.hbase.thrift.generated.TRowResult;
|
016 |
import org.apache.thrift.TException;
|
019 |
public class HBaseThriftClient extends AbstractHBaseThriftService {
|
021 |
public HBaseThriftClient() {
|
025 |
public HBaseThriftClient(String host, int port) {
|
030 |
public List<String> getTables() throws TException {
|
031 |
List<String> list = new ArrayList<String>( 0 );
|
032 |
for (ByteBuffer buf : client.getTableNames()) {
|
033 |
byte [] name = decode(buf);
|
034 |
list.add( new String(name));
|
039 |
static ByteBuffer wrap(String value) {
|
040 |
ByteBuffer bb = null ;
|
042 |
bb = ByteBuffer.wrap(value.getBytes(CHARSET));
|
043 |
} catch (UnsupportedEncodingException e) {
|
049 |
protected byte [] decode(ByteBuffer buffer) {
|
050 |
byte [] bytes = new byte [buffer.limit()];
|
051 |
for ( int i = 0 ; i < buffer.limit(); i++) {
|
052 |
bytes[i] = buffer.get();
|
058 |
public void update(String table, String rowKey, boolean writeToWal,
|
059 |
Map<String, String> fieldNameValues, Map<String, String> attributes) throws TException {
|
060 |
List<Mutation> mutations = new ArrayList<Mutation>();
|
061 |
for (Map.Entry<String, String> entry : fieldNameValues.entrySet()) {
|
062 |
mutations.add( new Mutation( false , wrap(entry.getKey()), wrap(entry.getValue()), writeToWal));
|
064 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
065 |
ByteBuffer tableName = wrap(table);
|
066 |
ByteBuffer row = wrap(rowKey);
|
067 |
client.mutateRow(tableName, row, mutations, wrappedAttributes);
|
071 |
public void update(String table, String rowKey, boolean writeToWal,
|
072 |
String fieldName, String fieldValue, Map<String, String> attributes) throws IOError, TException {
|
073 |
Map<String, String> fieldNameValues = new HashMap<String, String>();
|
074 |
fieldNameValues.put(fieldName, fieldValue);
|
075 |
update(table, rowKey, writeToWal, fieldNameValues, attributes);
|
080 |
public void deleteCells(String table, String rowKey, boolean writeToWal,
|
081 |
List<String> columns, Map<String, String> attributes) throws TException {
|
082 |
List<Mutation> mutations = new ArrayList<Mutation>();
|
083 |
for (String column : columns) {
|
084 |
mutations.add( new Mutation( false , wrap(column), null , writeToWal));
|
086 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
087 |
ByteBuffer tableName = wrap(table);
|
088 |
ByteBuffer row = wrap(rowKey);
|
089 |
client.mutateRow(tableName, row, mutations, wrappedAttributes);
|
093 |
public void deleteCell(String table, String rowKey, boolean writeToWal,
|
094 |
String column, Map<String, String> attributes) throws TException {
|
095 |
List<String> columns = new ArrayList<String>( 1 );
|
097 |
deleteCells(table, rowKey, writeToWal, columns, attributes);
|
102 |
public void deleteRow(String table, String rowKey, Map<String, String> attributes) throws TException {
|
103 |
ByteBuffer tableName = wrap(table);
|
104 |
ByteBuffer row = wrap(rowKey);
|
105 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
106 |
client.deleteAllRow(tableName, row, wrappedAttributes);
|
111 |
public int scannerOpen(String table, String startRow, List<String> columns,
|
112 |
Map<String, String> attributes) throws TException {
|
113 |
ByteBuffer tableName = wrap(table);
|
114 |
List<ByteBuffer> fl = encodeColumns(columns);
|
115 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
116 |
return client.scannerOpen(tableName, wrap(startRow), fl, wrappedAttributes);
|
120 |
public int scannerOpen(String table, String startRow, String stopRow, List<String> columns,
|
121 |
Map<String, String> attributes) throws TException {
|
122 |
ByteBuffer tableName = wrap(table);
|
123 |
List<ByteBuffer> fl = encodeColumns(columns);
|
124 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
125 |
return client.scannerOpenWithStop(tableName, wrap(startRow), wrap(stopRow), fl, wrappedAttributes);
|
129 |
public int scannerOpenWithPrefix(String table, String startAndPrefix, List<String> columns,
|
130 |
Map<String, String> attributes) throws TException {
|
131 |
ByteBuffer tableName = wrap(table);
|
132 |
List<ByteBuffer> fl = encodeColumns(columns);
|
133 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
134 |
return client.scannerOpenWithPrefix(tableName, wrap(startAndPrefix), fl, wrappedAttributes);
|
138 |
public int scannerOpenTs(String table, String startRow, List<String> columns,
|
139 |
long timestamp, Map<String, String> attributes) throws TException {
|
140 |
ByteBuffer tableName = wrap(table);
|
141 |
List<ByteBuffer> fl = encodeColumns(columns);
|
142 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
143 |
return client.scannerOpenTs(tableName, wrap(startRow), fl, timestamp, wrappedAttributes);
|
147 |
public int scannerOpenTs(String table, String startRow, String stopRow, List<String> columns,
|
148 |
long timestamp, Map<String, String> attributes) throws TException {
|
149 |
ByteBuffer tableName = wrap(table);
|
150 |
List<ByteBuffer> fl = encodeColumns(columns);
|
151 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
152 |
return client.scannerOpenWithStopTs(tableName, wrap(startRow), wrap(stopRow), fl, timestamp, wrappedAttributes);
|
156 |
public List<TRowResult> scannerGetList( int id, int nbRows) throws TException {
|
157 |
return client.scannerGetList(id, nbRows);
|
161 |
public List<TRowResult> scannerGet( int id) throws TException {
|
162 |
return client.scannerGetList(id, 1 );
|
166 |
public List<TRowResult> getRow(String table, String row,
|
167 |
Map<String, String> attributes) throws TException {
|
168 |
ByteBuffer tableName = wrap(table);
|
169 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
170 |
return client.getRow(tableName, wrap(row), wrappedAttributes);
|
174 |
public List<TRowResult> getRows(String table, List<String> rows,
|
175 |
Map<String, String> attributes) throws TException {
|
176 |
ByteBuffer tableName = wrap(table);
|
177 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
178 |
List<ByteBuffer> wrappedRows = encodeRows(rows);
|
179 |
return client.getRows(tableName, wrappedRows, wrappedAttributes);
|
183 |
public List<TRowResult> getRowsWithColumns(String table, List<String> rows,
|
184 |
List<String> columns, Map<String, String> attributes) throws TException {
|
185 |
ByteBuffer tableName = wrap(table);
|
186 |
List<ByteBuffer> wrappedRows = encodeRows(rows);
|
187 |
List<ByteBuffer> wrappedColumns = encodeColumns(columns);
|
188 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = encodeAttributes(attributes);
|
189 |
return client.getRowsWithColumns(tableName, wrappedRows, wrappedColumns, wrappedAttributes);
|
192 |
private List<ByteBuffer> encodeColumns(List<String> columns) {
|
193 |
List<ByteBuffer> fl = new ArrayList<ByteBuffer>( 0 );
|
194 |
for (String column : columns) {
|
195 |
fl.add(wrap(column));
|
200 |
private Map<ByteBuffer, ByteBuffer> encodeAttributes(Map<String, String> attributes) {
|
201 |
Map<ByteBuffer, ByteBuffer> wrappedAttributes = null ;
|
202 |
if (attributes != null && !attributes.isEmpty()) {
|
203 |
wrappedAttributes = new HashMap<ByteBuffer, ByteBuffer>( 1 );
|
204 |
for (Map.Entry<String, String> entry : attributes.entrySet()) {
|
205 |
wrappedAttributes.put(wrap(entry.getKey()), wrap(entry.getValue()));
|
208 |
return wrappedAttributes;
|
211 |
private List<ByteBuffer> encodeRows(List<String> rows) {
|
212 |
List<ByteBuffer> list = new ArrayList<ByteBuffer>( 0 );
|
213 |
for (String row : rows) {
|
220 |
public void iterateResults(TRowResult result) {
|
221 |
Iterator<Entry<ByteBuffer, TCell>> iter = result.columns.entrySet().iterator();
|
222 |
System.out.println( "RowKey=" + new String(result.getRow()));
|
223 |
while (iter.hasNext()) {
|
224 |
Entry<ByteBuffer, TCell> entry = iter.next();
|
225 |
System.out.println( "\tCol=" + new String(decode(entry.getKey())) + ", Value=" + new String(entry.getValue().getValue()));
|
230 |
public void scannerClose( int id) throws TException {
|
231 |
client.scannerClose(id);
|
上面代码,给出了基本的实现,接着我们给出测试用例,调用我们实现的客户端操作,与HBase表进行交互。实现的测试用例类如下所示:
001 |
package org.shirdrn.cloud.hbase.thrift;
|
003 |
import java.io.UnsupportedEncodingException;
|
004 |
import java.nio.ByteBuffer;
|
005 |
import java.text.DecimalFormat;
|
006 |
import java.util.ArrayList;
|
007 |
import java.util.HashMap;
|
008 |
import java.util.List;
|
009 |
import java.util.Map;
|
010 |
import java.util.Random;
|
012 |
import org.apache.hadoop.hbase.thrift.generated.IOError;
|
013 |
import org.apache.hadoop.hbase.thrift.generated.IllegalArgument;
|
014 |
import org.apache.hadoop.hbase.thrift.generated.TRowResult;
|
015 |
import org.apache.thrift.TException;
|
016 |
import org.apache.thrift.transport.TTransportException;
|
020 |
private static final String CHARSET = "UTF-8" ;
|
021 |
static DecimalFormat formatter = new DecimalFormat( "00" );
|
022 |
private final AbstractHBaseThriftService client;
|
024 |
public Test(String host, int port) {
|
025 |
client = new HBaseThriftClient(host, port);
|
028 |
} catch (TTransportException e) {
|
034 |
this ( "master" , 9090 );
|
037 |
static String randomlyBirthday() {
|
038 |
Random r = new Random();
|
039 |
int year = 1900 + r.nextInt( 100 );
|
040 |
int month = 1 + r.nextInt( 12 );
|
041 |
int date = 1 + r.nextInt( 30 );
|
042 |
return String.valueOf(year + "-" + formatter.format(month) + "-" + formatter.format(date));
|
045 |
static String randomlyGender() {
|
046 |
Random r = new Random();
|
047 |
int flag = r.nextInt( 2 );
|
048 |
return flag == 0 ? "M" : "F" ;
|
051 |
static String randomlyUserType() {
|
052 |
Random r = new Random();
|
053 |
int flag = 1 + r.nextInt( 10 );
|
054 |
return String.valueOf(flag);
|
057 |
static ByteBuffer wrap(String value) {
|
058 |
ByteBuffer bb = null ;
|
060 |
bb = ByteBuffer.wrap(value.getBytes(CHARSET));
|
061 |
} catch (UnsupportedEncodingException e) {
|
067 |
static DecimalFormat rowKeyFormatter = new DecimalFormat( "0000" );
|
069 |
public void caseForUpdate() throws TException {
|
070 |
boolean writeToWal = false ;
|
071 |
Map<String, String> attributes = new HashMap<String, String>( 0 );
|
072 |
String table = setTable();
|
074 |
for ( long i = 0 ; i < 10000 ; i++) {
|
075 |
String rowKey = rowKeyFormatter.format(i);
|
076 |
Map<String, String> fieldNameValues = new HashMap<String, String>();
|
077 |
fieldNameValues.put( "info:birthday" , randomlyBirthday());
|
078 |
fieldNameValues.put( "info:user_type" , randomlyUserType());
|
079 |
fieldNameValues.put( "info:gender" , randomlyGender());
|
080 |
client.update(table, rowKey, writeToWal, fieldNameValues, attributes);
|
084 |
public void caseForDeleteCells() throws TException {
|
085 |
boolean writeToWal = false ;
|
086 |
Map<String, String> attributes = new HashMap<String, String>( 0 );
|
087 |
String table = setTable();
|
089 |
for ( long i = 5 ; i < 10 ; i++) {
|
090 |
String rowKey = rowKeyFormatter.format(i);
|
091 |
List<String> columns = new ArrayList<String>( 0 );
|
092 |
columns.add( "info:birthday" );
|
093 |
client.deleteCells(table, rowKey, writeToWal, columns, attributes);
|
097 |
private String setTable() {
|
098 |
String table = "test_info" ;
|
102 |
public void caseForDeleteRow() throws TException {
|
103 |
Map<String, String> attributes = new HashMap<String, String>( 0 );
|
104 |
String table = setTable();
|
106 |
for ( long i = 5 ; i < 10 ; i++) {
|
107 |
String rowKey = rowKeyFormatter.format(i);
|
108 |
client.deleteRow(table, rowKey, attributes);
|
112 |
public void caseForScan() throws TException {
|
113 |
Map<String, String> attributes = new HashMap<String, String>( 0 );
|
114 |
String table = setTable();
|
115 |
String startRow = "0005" ;
|
116 |
String stopRow = "0015" ;
|
117 |
List<String> columns = new ArrayList<String>( 0 );
|
118 |
columns.add( "info:birthday" );
|
119 |
int id = client.scannerOpen(table, startRow, stopRow, columns, attributes);
|
121 |
List<TRowResult> results = client.scannerGetList(id, nbRows);
|
122 |
while (results != null && !results.isEmpty()) {
|
123 |
for (TRowResult result : results) {
|
124 |
client.iterateResults(result);
|
126 |
results = client.scannerGetList(id, nbRows);
|
128 |
client.scannerClose(id);
|
131 |
public void caseForGet() throws TException {
|
132 |
Map<String, String> attributes = new HashMap<String, String>( 0 );
|
133 |
String table = setTable();
|
134 |
List<String> rows = new ArrayList<String>( 0 );
|
138 |
List<String> columns = new ArrayList<String>( 0 );
|
139 |
columns.add( "info:birthday" );
|
140 |
columns.add( "info:gender" );
|
141 |
List<TRowResult> results = client.getRowsWithColumns(table, rows, columns, attributes);
|
142 |
for (TRowResult result : results) {
|
143 |
client.iterateResults(result);
|
147 |
public static void main(String[] args)
|
148 |
throws IOError, IllegalArgument, TException, UnsupportedEncodingException {
|
149 |
Test test = new Test();
|
150 |
// test.caseForUpdate(); // insert or update rows/cells |
151 |
// test.caseForDelete(); // delete cells |
152 |
// test.caseForDeleteRow(); // delete rows |
153 |
// test.caseForScan(); // scan rows |
154 |
test.caseForGet(); // get rows
|
上面的测试可以实现操作Hbase表数据。另外,在生成的Thrift客户端代码中,org.apache.hadoop.hbase.thrift.generated.Hbase.Iface中给出了全部的服务接口,可以根据需要来选择,客户端org.apache.hadoop.hbase.thrift.generated.Hbase.Client实现了与Thrift交互的一些逻辑的处理,通过该类对象可以代理HBase提供的Thrift服务。
时间: 2024-09-20 15:43:15