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ArcLoader.java
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Created
Sun, Jul 7, 04:54
Size
1 KB
Mime Type
text/x-java
Expires
Tue, Jul 9, 04:54 (2 d)
Engine
blob
Format
Raw Data
Handle
18853734
Attached To
R1473 warcbase
ArcLoader.java
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package
org.warcbase.pig
;
import
java.io.IOException
;
import
java.util.List
;
import
org.apache.hadoop.io.LongWritable
;
import
org.apache.hadoop.mapreduce.Job
;
import
org.apache.hadoop.mapreduce.RecordReader
;
import
org.apache.hadoop.mapreduce.lib.input.FileInputFormat
;
import
org.apache.pig.FileInputLoadFunc
;
import
org.apache.pig.PigException
;
import
org.apache.pig.backend.executionengine.ExecException
;
import
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit
;
import
org.apache.pig.data.Tuple
;
import
org.apache.pig.data.TupleFactory
;
import
org.jwat.arc.ArcRecordBase
;
import
org.warcbase.mapreduce.ArcInputFormat
;
import
com.google.common.collect.Lists
;
public
class
ArcLoader
extends
FileInputLoadFunc
{
private
static
final
TupleFactory
TUPLE_FACTORY
=
TupleFactory
.
getInstance
();
private
RecordReader
<
LongWritable
,
ArcRecordBase
>
in
;
public
ArcLoader
()
{
}
@Override
public
ArcInputFormat
getInputFormat
()
throws
IOException
{
return
new
ArcInputFormat
();
}
@Override
public
Tuple
getNext
()
throws
IOException
{
try
{
if
(
!
in
.
nextKeyValue
()
)
{
return
null
;
}
ArcRecordBase
record
=
in
.
getCurrentValue
();
List
<
String
>
protoTuple
=
Lists
.
newArrayList
();
protoTuple
.
add
(
record
.
getUrlStr
());
protoTuple
.
add
(
record
.
getArchiveDateStr
());
protoTuple
.
add
(
record
.
getContentTypeStr
());
return
TUPLE_FACTORY
.
newTupleNoCopy
(
protoTuple
);
}
catch
(
InterruptedException
e
)
{
int
errCode
=
6018
;
String
errMsg
=
"Error while reading input"
;
throw
new
ExecException
(
errMsg
,
errCode
,
PigException
.
REMOTE_ENVIRONMENT
,
e
);
}
}
@SuppressWarnings
({
"unchecked"
,
"rawtypes"
})
@Override
public
void
prepareToRead
(
RecordReader
reader
,
PigSplit
split
)
{
in
=
reader
;
}
@Override
public
void
setLocation
(
String
location
,
Job
job
)
throws
IOException
{
FileInputFormat
.
setInputPaths
(
job
,
location
);
}
}
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