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java.lang.Object 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 hostnames where the input split is located. |
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 |
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@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 processpublic 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 nullMethod Detail |
---|
public Path getPath()
public long getStart()
public long getLength()
getLength
in interface InputSplit
public String toString()
toString
in class Object
public void write(DataOutput out) throws IOException
Writable
out
.
write
in interface Writable
out
- DataOuput
to serialize this object into.
IOException
public void readFields(DataInput in) throws IOException
Writable
in
.
For efficiency, implementations should attempt to re-use storage in the existing object where possible.
readFields
in interface Writable
in
- DataInput
to deseriablize this object from.
IOException
public String[] getLocations() throws IOException
InputSplit
getLocations
in interface InputSplit
InputSplit
is
located as an array of String
s.
IOException
|
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