org.apache.flink.addons.hbase

类 TableInputFormat<T extends org.apache.flink.api.java.tuple.Tuple>

java.lang.Object

org.apache.flink.api.common.io.RichInputFormat<T,TableInputSplit>

org.apache.flink.addons.hbase.AbstractTableInputFormat<T>

org.apache.flink.addons.hbase.TableInputFormat<T>

所有已实现的接口:

Serializable, org.apache.flink.api.common.io.InputFormat<T,TableInputSplit>, org.apache.flink.core.io.InputSplitSource<TableInputSplit>

public abstract class TableInputFormat<T extends org.apache.flink.api.java.tuple.Tuple>
extends AbstractTableInputFormat<T>

InputFormat subclass that wraps the access for HTables.

另请参阅:

序列化表格

字段概要

从类继承的字段 org.apache.flink.addons.hbase.AbstractTableInputFormat

currentRow, endReached, LOG, resultScanner, scan, scannedRows, table

构造器概要

构造器

构造器和说明
TableInputFormat()

方法概要

限定符和类型	方法和说明
void	configure(org.apache.flink.configuration.Configuration parameters) Creates a Scan object and opens the HTable connection.
protected abstract org.apache.hadoop.hbase.client.Scan	getScanner() Returns an instance of Scan that retrieves the required subset of records from the HBase table.
protected abstract String	getTableName() What table is to be read.
protected T	mapResultToOutType(org.apache.hadoop.hbase.client.Result r) HBase returns an instance of Result.
protected abstract T	mapResultToTuple(org.apache.hadoop.hbase.client.Result r) The output from HBase is always an instance of Result.

从类继承的方法 org.apache.flink.addons.hbase.AbstractTableInputFormat

close, closeInputFormat, createInputSplits, getInputSplitAssigner, getStatistics, includeRegionInScan, nextRecord, open, reachedEnd

从类继承的方法 org.apache.flink.api.common.io.RichInputFormat

getRuntimeContext, openInputFormat, setRuntimeContext

从类继承的方法 java.lang.Object

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

构造器详细资料

TableInputFormat

public TableInputFormat()

方法详细资料

getScanner

protected abstract org.apache.hadoop.hbase.client.Scan getScanner()

Returns an instance of Scan that retrieves the required subset of records from the HBase table.

指定者:

getScanner 在类中 AbstractTableInputFormat<T extends org.apache.flink.api.java.tuple.Tuple>

返回:

The appropriate instance of Scan for this usecase.

getTableName

protected abstract String getTableName()

What table is to be read. Per instance of a TableInputFormat derivative only a single tablename is possible.

指定者:

getTableName 在类中 AbstractTableInputFormat<T extends org.apache.flink.api.java.tuple.Tuple>

返回:

The name of the table

mapResultToTuple

protected abstract T mapResultToTuple(org.apache.hadoop.hbase.client.Result r)

The output from HBase is always an instance of Result. This method is to copy the data in the Result instance into the required Tuple

参数:

r - The Result instance from HBase that needs to be converted

返回:

The appropriate instance of Tuple that contains the needed information.

configure

public void configure(org.apache.flink.configuration.Configuration parameters)

Creates a Scan object and opens the HTable connection. These are opened here because they are needed in the createInputSplits which is called before the openInputFormat method. So the connection is opened in configure(Configuration) and closed in AbstractTableInputFormat.closeInputFormat().

指定者:

configure 在接口中 org.apache.flink.api.common.io.InputFormat<T extends org.apache.flink.api.java.tuple.Tuple,TableInputSplit>

指定者:

configure 在类中 AbstractTableInputFormat<T extends org.apache.flink.api.java.tuple.Tuple>

参数:

parameters - The configuration that is to be used

另请参阅:

Configuration

mapResultToOutType

protected T mapResultToOutType(org.apache.hadoop.hbase.client.Result r)

从类复制的说明: AbstractTableInputFormat

HBase returns an instance of Result.

This method maps the returned Result instance into the output type T.

指定者:

mapResultToOutType 在类中 AbstractTableInputFormat<T extends org.apache.flink.api.java.tuple.Tuple>

参数:

r - The Result instance from HBase that needs to be converted

返回:

The appropriate instance of T that contains the data of Result.