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java.lang.Objectorg.apache.hadoop.mapreduce.InputSplit
org.apache.hadoop.mapred.FileSplit
public class FileSplit
A section of an input file. Returned by InputFormat.getSplits(JobConf, int) and passed to
InputFormat.getRecordReader(InputSplit,JobConf,Reporter).
| Constructor Summary | |
|---|---|
FileSplit(Path file,
long start,
long length,
JobConf conf)
Deprecated. |
|
FileSplit(Path file,
long start,
long length,
String[] hosts)
Constructs a split with host information |
|
| Method Summary | |
|---|---|
long |
getLength()
The number of bytes in the file to process. |
String[] |
getLocations()
Get the list of nodes by name where the data for the split would be local. |
Path |
getPath()
The file containing this split's data. |
long |
getStart()
The position of the first byte in the file to process. |
void |
readFields(DataInput in)
Deserialize the fields of this object from in. |
String |
toString()
|
void |
write(DataOutput out)
Serialize the fields of this object to out. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
@Deprecated
public FileSplit(Path file,
long start,
long length,
JobConf conf)
file - the file namestart - the position of the first byte in the file to processlength - the number of bytes in the file to process
public FileSplit(Path file,
long start,
long length,
String[] hosts)
file - the file namestart - the position of the first byte in the file to processlength - the number of bytes in the file to processhosts - the list of hosts containing the block, possibly null| Method Detail |
|---|
public Path getPath()
public long getStart()
public long getLength()
getLength in interface InputSplitgetLength in class InputSplitpublic String toString()
toString in class Object
public void write(DataOutput out)
throws IOException
Writableout.
write in interface Writableout - DataOuput to serialize this object into.
IOException
public void readFields(DataInput in)
throws IOException
Writablein.
For efficiency, implementations should attempt to re-use storage in the existing object where possible.
readFields in interface Writablein - DataInput to deseriablize this object from.
IOException
public String[] getLocations()
throws IOException
InputSplit
getLocations in interface InputSplitgetLocations in class InputSplitIOException
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