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java.lang.Objectorg.apache.hadoop.mapreduce.InputSplit
org.apache.hadoop.mapreduce.lib.input.FileSplit
public class FileSplit
A section of an input file. Returned by InputFormat.getSplits(JobContext) and passed to
InputFormat.createRecordReader(InputSplit,TaskAttemptContext).
| Constructor Summary | |
|---|---|
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 |
|---|
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 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 class InputSplitIOException
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