org.apache.hadoop.hbase.mapred

类 TableInputFormat

java.lang.Object

org.apache.hadoop.hbase.mapred.TableInputFormatBase

org.apache.hadoop.hbase.mapred.TableInputFormat

所有已实现的接口:

org.apache.hadoop.mapred.InputFormat<ImmutableBytesWritable,Result>, org.apache.hadoop.mapred.JobConfigurable

@InterfaceAudience.Public
@InterfaceStability.Stable
public class TableInputFormat
extends TableInputFormatBase
implements org.apache.hadoop.mapred.JobConfigurable

Convert HBase tabular data into a format that is consumable by Map/Reduce.

字段概要

字段

限定符和类型	字段和说明
static String	COLUMN_LIST space delimited list of columns

构造器概要

构造器

构造器和说明
TableInputFormat()

方法概要

方法

限定符和类型	方法和说明
void	configure(org.apache.hadoop.mapred.JobConf job)
protected void	initialize(org.apache.hadoop.mapred.JobConf job) Handle subclass specific set up.
void	validateInput(org.apache.hadoop.mapred.JobConf job)

从类继承的方法 org.apache.hadoop.hbase.mapred.TableInputFormatBase

closeTable, getHTable, getRecordReader, getSplits, getTable, initializeTable, setHTable, setInputColumns, setRowFilter, setTableRecordReader

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

COLUMN_LIST

public static final String COLUMN_LIST

space delimited list of columns

另请参阅:

常量字段值

构造器详细资料

TableInputFormat

public TableInputFormat()

方法详细资料

configure

public void configure(org.apache.hadoop.mapred.JobConf job)

指定者:

configure 在接口中 org.apache.hadoop.mapred.JobConfigurable

initialize

protected void initialize(org.apache.hadoop.mapred.JobConf job)
                   throws IOException

从类复制的说明: TableInputFormatBase

Handle subclass specific set up. Each of the entry points used by the MapReduce framework, TableInputFormatBase.getRecordReader(InputSplit, JobConf, Reporter) and TableInputFormatBase.getSplits(JobConf, int), will call TableInputFormatBase.initialize(JobConf) as a convenient centralized location to handle retrieving the necessary configuration information and calling TableInputFormatBase.initializeTable(Connection, TableName). Subclasses should implement their initialize call such that it is safe to call multiple times. The current TableInputFormatBase implementation relies on a non-null table reference to decide if an initialize call is needed, but this behavior may change in the future. In particular, it is critical that initializeTable not be called multiple times since this will leak Connection instances.

覆盖:

initialize 在类中 TableInputFormatBase

抛出:

IOException

validateInput

public void validateInput(org.apache.hadoop.mapred.JobConf job)
                   throws IOException

抛出:

IOException