org.apache.hadoop.hive.io
Class HiveIOExceptionHandlerChain

java.lang.Object
  org.apache.hadoop.hive.io.HiveIOExceptionHandlerChain

public class HiveIOExceptionHandlerChain
extends Object

An exception handler chain that process the input exception by going through all exceptions defined in this chain one by one until either one exception handler returns true or it reaches the end of the chain. If it reaches the end of the chain, and still no exception handler returns true, throw the exception to the caller.

Field Summary

static String

HIVE_IO_EXCEPTION_HANDLE_CHAIN

Constructor Summary

HiveIOExceptionHandlerChain()

Method Summary

protected List<HiveIOExceptionHandler>	getHandlerChain()
static HiveIOExceptionHandlerChain	getHiveIOExceptionHandlerChain(org.apache.hadoop.mapred.JobConf conf)
org.apache.hadoop.mapred.RecordReader<?,?>	handleRecordReaderCreationException(Exception e)
boolean	handleRecordReaderNextException(Exception e) This is to handle exception when doing next operations.
protected void	setHandlerChain(List<HiveIOExceptionHandler> handlerChain) set the exception handler chain

Methods inherited from class java.lang.Object

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

Field Detail

HIVE_IO_EXCEPTION_HANDLE_CHAIN

public static String HIVE_IO_EXCEPTION_HANDLE_CHAIN

Constructor Detail

HiveIOExceptionHandlerChain

public HiveIOExceptionHandlerChain()

Method Detail

getHiveIOExceptionHandlerChain

public static HiveIOExceptionHandlerChain getHiveIOExceptionHandlerChain(org.apache.hadoop.mapred.JobConf conf)

getHandlerChain

protected List<HiveIOExceptionHandler> getHandlerChain()

Returns:

the exception handler chain defined

setHandlerChain

protected void setHandlerChain(List<HiveIOExceptionHandler> handlerChain)

set the exception handler chain

Parameters:

handlerChain -

handleRecordReaderCreationException

public org.apache.hadoop.mapred.RecordReader<?,?> handleRecordReaderCreationException(Exception e)
                                                                               throws IOException

Throws:

IOException

handleRecordReaderNextException

public boolean handleRecordReaderNextException(Exception e)
                                        throws IOException

This is to handle exception when doing next operations. Here we use a HiveIOExceptionNextHandleResult to store the results of each handler. If the exception is handled by one handler, the handler should set HiveIOExceptionNextHandleResult to be handled, and also set the handle result. The handle result is used to return the reader's next to determine if need to open a new file for read or not.

Throws:

IOException