spring hadoop 访问hbase入门
1、 环境准备：
Maven
Eclipse
Java
Spring 版本 3..2.9
2、 Maven pom.xml配置
<!-- Spring hadoop --> <dependency> <groupId>org.apache.hbase</groupId> <artifactId>hbase-client</artifactId> <version>0.96.1.1-hadoop2</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-jpa</artifactId> <version>1.6.0.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-hadoop</artifactId> <version>2.0.2.RELEASE</version> </dependency>
3、 Spring和hadoop、hbase相关配置文件
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:mongo="http://www.springframework.org/schema/data/mongo" xmlns:hdp="http://www.springframework.org/schema/hadoop" xmlns:cache="http://www.springframework.org/schema/cache" xmlns:c="http://www.springframework.org/schema/c" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation=" http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo.xsd http://www.springframework.org/schema/hadoop http://www.springframework.org/schema/hadoop/spring-hadoop.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
其中标红的是spring hadoop xml命名空间配置。
Hadoop hbase相关配置文件如下：
<!-- 默认properties-->
<hdp:configuration>fs.default.name=hdfs://192.98.8.224:8010</hdp:configuration>
<hdp:hbase-configuration delete-connection="${delete-connection}" zk-quorum="${hbase.zookeeper.quorum}" zk- port="${hbase.zookeeper.property.clientPort}"/>
对应的properties如下：
hbase.zookeeper.property.clientPort=2181
hbase.zookeeper.quorum=192.98.8.224
hbase.master=192.98.8.224:600000
fs.default.name=hdfs://192.98.8.224:8010
delete-connection=true
#hive jdbc url
hive.url=jdbc:hive://192.98.8.224:10000/default
spring hbasetemplate配置如下：
<bean id="hbaseTemplate" class="org.springframework.data.hadoop.hbase.HbaseTemplate"> <property name="configuration" ref="hbaseConfiguration" />
</bean>
Hbasetemplate使用代码示例：
Tile t = hbaseTemplate.get("GW_TILES", "0_1_1", new RowMapper<Tile>() {
@Override
public Tile mapRow(Result result, int rowNum) throws Exception {
// TODO Auto-generated method stub
Tile t = new Tile();
t.setData(result.getValue("T".getBytes(), "key".getBytes()));
return t;
}
});
Hbasetemplate 常用方法简介：
hbaseTemplate.get("GW_TILES", "0_1_1", new RowMapper 常用于查询，使用示例如下所示：
Tile t = hbaseTemplate.get("GW_TILES", "0_1_1", new RowMapper<Tile>() {
@Override
public Tile mapRow(Result result, int rowNum) throws Exception {
// TODO Auto-generated method stub
Tile t = new Tile();
t.setData(result.getValue("T".getBytes(), "key".getBytes()));
return t;
}
});
hbaseTemplate.execute(dataIdentifier, new TableCallback 常用于更新操作，使用示例如下所示：
return hbaseTemplate.execute(dataIdentifier, new TableCallback<Boolean>() {
@Override
public Boolean doInTable(HTableInterface table) throws Throwable {
// TODO Auto-generated method stub
boolean flag = false;
try{
Delete delete = new Delete(key.getBytes());
table.delete(delete);
flag = true;
}catch(Exception e){
e.printStackTrace();
}
return flag;
}
});
备注：spring hbasetemplate针对hbase接口做了强大的封装，普通功能可以使用它强大的接口，同时复杂的功能，还可以使用hbase原生的接口，如：HTableInterface、Result等。其类方法如下图：
同时hbasetemplate封装了hbase连接池等，它的创建和释放通过配置来自动管理。
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