Created
December 31, 2010 09:33
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import java.io.*; | |
import java.util.*; | |
import org.apache.hadoop.conf.*; | |
import org.apache.hadoop.fs.*; | |
import org.apache.hadoop.hbase.*; | |
import org.apache.hadoop.hbase.client.*; | |
import org.apache.hadoop.hbase.util.*; | |
public class Test { | |
public static void main(String[] args) { | |
Configuration conf = HBaseConfiguration.create(); | |
conf.addResource(new Path("/etc/hbase/conf/hbase-default.xml")); | |
conf.addResource(new Path("/etc/hbase/conf/hbase-site.xml")); | |
try { | |
// 操作対象の情報 | |
byte[] key = Bytes.toBytes("row-by-java-client"); | |
byte[] val = Bytes.toBytes("val"); | |
// テーブル操作のためのクラス | |
HTable table = new HTable(conf, "sample"); | |
// 1) データの挿入 | |
Put p = new Put(key); | |
byte[] family = Bytes.toBytes("data"); | |
byte[] column = Bytes.toBytes("column"); | |
p.add(family, column, val); | |
table.put(p); | |
// 2) データの取得 | |
Get g = new Get(key); | |
Result r = table.get(g); | |
System.out.println("Get: " + r); | |
// 3) データのスキャン | |
Scan scan = new Scan(); | |
ResultScanner scanner = table.getScanner(scan); | |
try { | |
// Scannerの結果をイテレート | |
for (Result sr: scanner) | |
System.out.println("Scan: " + sr); | |
} finally { | |
scanner.close(); | |
} | |
// 4) 特定のrowからのscan | |
byte[] start = Bytes.toBytes("row3"); | |
scan = new Scan(start); | |
scanner = table.getScanner(scan); | |
try { | |
// Scannerの結果をイテレート | |
for (Result sr: scanner) | |
System.out.println("Scan: " + sr); | |
} finally { | |
scanner.close(); | |
} | |
} catch (IOException e) { | |
e.printStackTrace(); | |
} | |
} | |
} |
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