hbase轻量级中间件simplehbase v0.2简介

https://github.com/zhang-xzhi/simplehbase/ 
https://github.com/zhang-xzhi/simplehbase/wiki 
simplehbase简介 

simplehbase是java和hbase之间的轻量级中间件。 主要包含以下功能。 

    数据类型映射：java类型和hbase的bytes之间的数据转换。 
    简单操作封装：封装了hbase的put,get,scan等操作为简单的java操作方式。 
    hbase query封装：封装了hbase的filter，可以使用sql-like的方式操作hbase。 
    动态query封装：类似于myibatis，可以使用xml配置动态语句查询hbase。 

simplehbase示例 
setup hbase 

可以参考网上文档。 
初始化simplehbase 

private static SimpleHbaseClient getSimpleHbaseClient() {
    HBaseDataSource hbaseDataSource = new HBaseDataSource();
    List<String> hbaseConfigFilePaths = new ArrayList<String>();
    //hbase配置文件。
    hbaseConfigFilePaths.add("sample\\hbase_site");
    //zk配置文件。
    hbaseConfigFilePaths.add("sample\\zk_conf");
    hbaseDataSource.setHbaseConfigFilePaths(hbaseConfigFilePaths);
    hbaseDataSource.init();

    HBaseTableConfig hbaseTableConfig = new HBaseTableConfig();
    //simplehbase配置文件。
    hbaseTableConfig.setConfigFilePath("sample\\myRecord.xml");
    hbaseTableConfig.init();

    SimpleHbaseClient tClient = new SimpleHbaseClientImpl();
    tClient.setHBaseDataSource(hbaseDataSource);
    tClient.setHbaseTableConfig(hbaseTableConfig);

    return tClient;
}

simplehbase配置xml 

包含htable的配置和一个动态查询的配置 

<HBaseTableSchema tableName="MyRecord" defaultFamily="MyRecordFamily">
    <HBaseColumnSchema qualifier="id" typeName="int" />
    <HBaseColumnSchema qualifier="name" typeName="string" />
    <HBaseColumnSchema qualifier="date" typeName="date" />
    <HBaseColumnSchema qualifier="gender" typeName="allen.sample.Gender" />
    <HBaseColumnSchema qualifier="age" typeName="int" />
</HBaseTableSchema>

<statements>
    <statement id="queryByNameAndAge">
        select where id greater #id#
        <isPropertyAvailable prepend="and" property="name">
            name equal #name#
        </isPropertyAvailable>
        <isPropertyAvailable prepend="and" property="age">
            age greater #age#
        </isPropertyAvailable>
    </statement>
</statements>

  

定义DO对象 

@HBaseTable(defaultFamily = "MyRecordFamily")
public class Person {
    @HBaseColumn(qualifier = "id")
    private int    id;
    @HBaseColumn(qualifier = "name")
    private String name;
    @HBaseColumn(qualifier = "date")
    private Date   date;
    @HBaseColumn(qualifier = "gender")
    private Gender gender;
    @HBaseColumn(qualifier = "age")
    private int    age;
}

定义该htable的rowkey 

public class PersonRowKey implements RowKey {

    private int row;

    public PersonRowKey(int row) {
        this.row = row;
    }

    @Override
    public byte[] toBytes() {
        return Bytes.toBytes(row);
    }
}

使用simplehbaseclient操作hbase 

public static void main(String[] args) throws Exception {

    SimpleHbaseClient simpleHbaseClient = getSimpleHbaseClient();

    //插入一条记录。
    Person one = new Person();
    one.setId(1);
    one.setName("allen");
    one.setAge(30);
    one.setGender(Gender.MALE);
    simpleHbaseClient.putObject(new PersonRowKey(1), one);

    //插入一条记录。
    Person two = new Person();
    two.setId(2);
    two.setName("dan");
    two.setAge(31);
    two.setGender(Gender.FEMALE);
    simpleHbaseClient.putObject(new PersonRowKey(2), two);

    //按照主键查询。
    Person result = simpleHbaseClient.findObject(new PersonRowKey(1),
            Person.class);
    log.info(result);

    //按照范围查询
    List<Person> resultList = simpleHbaseClient.findObjectList(
            new PersonRowKey(1), new PersonRowKey(3), Person.class);
    log.info(resultList);

    //动态语句查询
    Map<String, Object> para = new HashMap<String, Object>();
    para.put("id", 0);

    resultList = simpleHbaseClient.findObjectList(new PersonRowKey(1),
            new PersonRowKey(3), Person.class, "queryByNameAndAge", para);
    log.info(resultList);

    //动态语句查询
    para.put("name", "allen");
    para.put("age", 0);
    resultList = simpleHbaseClient.findObjectList(new PersonRowKey(1),
            new PersonRowKey(3), Person.class, "queryByNameAndAge", para);
    log.info(resultList);

    //删除批量数据。
    simpleHbaseClient.deleteObjectList(new PersonRowKey(0),
            new PersonRowKey(100));

}