标签：pre string try out toc name tab turn nal
java中访问hbase有两种方式，一种是hbase自带的client，一种是通过hbase thrift
Configuration conf = HBaseConfiguration.create(); conf.set(HConstants.ZOOKEEPER_CLIENT_PORT, "2181"); conf.set(HConstants.ZOOKEEPER_QUORUM, "zk_host"); Connection connection = ConnectionFactory.createConnection(conf); Table profileTable = connection.getTable(TableName.valueOf("test_table")); Result result = profileTable.get(new Get(Bytes.toBytes("test_rowkey"))); System.out.println(new String(result.getValue(Bytes.toBytes("test_cf"), Bytes.toBytes("test_column"))));
这里只需要配置zookeeper，访问的过程是先通过zookeeper找hmaster，然后通过hmaster定位到一个region server，然后访问region server，所以需要客户端到hbase所有节点（包括zookeeper、hmaster、region server）可达，即host能ping通；
TTransport transport = null; try { transport = new TSocket(host, port, timeout); transport.open(); TProtocol protocol = new TBinaryProtocol(transport); THBaseService.Iface client = new THBaseService.Client(protocol); ByteBuffer table = ByteBuffer.wrap(tableName.getBytes()); TGet get = new TGet(ByteBuffer.wrap(rowKey.getBytes())); try { TResult result = client.get(table, get); return result; } catch (Exception e) { throw new RuntimeException(e); } } catch (Exception e) { throw new RuntimeException(e); } finally { transport.close(); }
这里只需要配置hbase thrift server的ip和端口，没有任何其他依赖；单点问题可以通过加load balancer来解决；
综上，如果不需要配host，两种都可以，如果需要配host，使用thrift更简单；
标签：pre string try out toc name tab turn nal
原文地址：https://www.cnblogs.com/barneywill/p/10109258.html
