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java.lang.Objectorg.apache.hadoop.mapreduce.RecordReader<K,V>
org.apache.hadoop.mapreduce.lib.input.DelegatingRecordReader<K,V>
public class DelegatingRecordReader<K,V>
This is a delegating RecordReader, which delegates the functionality to the
underlying record reader in TaggedInputSplit
Constructor Summary | |
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DelegatingRecordReader(InputSplit split,
TaskAttemptContext context)
Constructs the DelegatingRecordReader. |
Method Summary | |
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void |
close()
Close the record reader. |
K |
getCurrentKey()
Get the current key |
V |
getCurrentValue()
Get the current value. |
float |
getProgress()
The current progress of the record reader through its data. |
void |
initialize(InputSplit split,
TaskAttemptContext context)
Called once at initialization. |
boolean |
nextKeyValue()
Read the next key, value pair. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public DelegatingRecordReader(InputSplit split, TaskAttemptContext context) throws java.io.IOException, java.lang.InterruptedException
split
- TaggegInputSplit objectcontext
- TaskAttemptContext object
java.io.IOException
java.lang.InterruptedException
Method Detail |
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public void close() throws java.io.IOException
RecordReader
close
in interface java.io.Closeable
close
in class RecordReader<K,V>
java.io.IOException
public K getCurrentKey() throws java.io.IOException, java.lang.InterruptedException
RecordReader
getCurrentKey
in class RecordReader<K,V>
java.io.IOException
java.lang.InterruptedException
public V getCurrentValue() throws java.io.IOException, java.lang.InterruptedException
RecordReader
getCurrentValue
in class RecordReader<K,V>
java.io.IOException
java.lang.InterruptedException
public float getProgress() throws java.io.IOException, java.lang.InterruptedException
RecordReader
getProgress
in class RecordReader<K,V>
java.io.IOException
java.lang.InterruptedException
public void initialize(InputSplit split, TaskAttemptContext context) throws java.io.IOException, java.lang.InterruptedException
RecordReader
initialize
in class RecordReader<K,V>
split
- the split that defines the range of records to readcontext
- the information about the task
java.io.IOException
java.lang.InterruptedException
public boolean nextKeyValue() throws java.io.IOException, java.lang.InterruptedException
RecordReader
nextKeyValue
in class RecordReader<K,V>
java.io.IOException
java.lang.InterruptedException
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