在Java環(huán)境下設(shè)計(jì)HBase存儲(chǔ)方案,需要考慮以下幾個(gè)方面:
hbase-site.xml
文件,包括Zookeeper地址、HBase Master和RegionServer的配置等。pom.xml
文件中添加:<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-client</artifactId>
<version>2.4.9</version>
</dependency>
Connection
類(lèi)創(chuàng)建與HBase集群的連接。例如:Configuration config = HBaseConfiguration.create();
config.set("hbase.zookeeper.quorum", "localhost");
Connection connection = ConnectionFactory.createConnection(config);
Admin
接口創(chuàng)建表。例如:Admin admin = connection.getAdmin();
HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf("myTable"));
tableDescriptor.addFamily(new HColumnDescriptor("cf1"));
admin.createTable(tableDescriptor);
Put
對(duì)象插入數(shù)據(jù)。例如:Table table = connection.getTable(TableName.valueOf("myTable"));
Put put = new Put("row1".getBytes());
put.addColumn("cf1".getBytes(), "column1".getBytes(), "value1".getBytes());
table.put(put);
Get
對(duì)象讀取數(shù)據(jù)。例如:Get get = new Get("row1".getBytes());
Result result = table.get(get);
byte[] value = result.getValue("cf1".getBytes(), "column1".getBytes());
String valueStr = new String(value);
IOException
等異常,需要進(jìn)行適當(dāng)?shù)漠惓L幚?。例如?pre class="hljs">try {
// HBase操作代碼
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (table != null) table.close();
if (admin != null) admin.close();
if (connection != null) connection.close();
} catch (IOException e) {
e.printStackTrace();
}
}
List<Put> puts = new ArrayList<>();
for (int i = 0; i < 100; i++) {
Put put = new Put(("row" + i).getBytes());
put.addColumn("cf1".getBytes(), ("column" + i).getBytes(), ("value" + i).getBytes());
puts.add(put);
}
table.put(puts);
通過(guò)以上步驟,可以在Java環(huán)境下設(shè)計(jì)一個(gè)基本的HBase存儲(chǔ)方案。根據(jù)具體需求,還可以進(jìn)一步擴(kuò)展和優(yōu)化。