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java.lang.Objectorg.apache.hadoop.mapred.MapReduceBase
org.apache.hadoop.hbase.mapred.GroupingTableMap
@Deprecated public class GroupingTableMap
Extract grouping columns from input record
| Field Summary | |
|---|---|
protected byte[][] |
columns
Deprecated. |
static String |
GROUP_COLUMNS
Deprecated. JobConf parameter to specify the columns used to produce the key passed to collect from the map phase |
| Constructor Summary | |
|---|---|
GroupingTableMap()
Deprecated. |
|
| Method Summary | |
|---|---|
void |
configure(org.apache.hadoop.mapred.JobConf job)
Deprecated. |
protected ImmutableBytesWritable |
createGroupKey(byte[][] vals)
Deprecated. Create a key by concatenating multiple column values. |
protected byte[][] |
extractKeyValues(Result r)
Deprecated. Extract columns values from the current record. |
static void |
initJob(String table,
String columns,
String groupColumns,
Class<? extends TableMap> mapper,
org.apache.hadoop.mapred.JobConf job)
Deprecated. Use this before submitting a TableMap job. |
void |
map(ImmutableBytesWritable key,
Result value,
org.apache.hadoop.mapred.OutputCollector<ImmutableBytesWritable,Result> output,
org.apache.hadoop.mapred.Reporter reporter)
Deprecated. Extract the grouping columns from value to construct a new key. |
| Methods inherited from class org.apache.hadoop.mapred.MapReduceBase |
|---|
close |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface java.io.Closeable |
|---|
close |
| Field Detail |
|---|
public static final String GROUP_COLUMNS
protected byte[][] columns
| Constructor Detail |
|---|
public GroupingTableMap()
| Method Detail |
|---|
public static void initJob(String table,
String columns,
String groupColumns,
Class<? extends TableMap> mapper,
org.apache.hadoop.mapred.JobConf job)
table - table to be processedcolumns - space separated list of columns to fetchgroupColumns - space separated list of columns used to form the key
used in collectmapper - map classjob - job configuration objectpublic void configure(org.apache.hadoop.mapred.JobConf job)
configure in interface org.apache.hadoop.mapred.JobConfigurableconfigure in class org.apache.hadoop.mapred.MapReduceBase
public void map(ImmutableBytesWritable key,
Result value,
org.apache.hadoop.mapred.OutputCollector<ImmutableBytesWritable,Result> output,
org.apache.hadoop.mapred.Reporter reporter)
throws IOException
map in interface org.apache.hadoop.mapred.Mapper<ImmutableBytesWritable,Result,ImmutableBytesWritable,Result>key - value - output - reporter -
IOExceptionprotected byte[][] extractKeyValues(Result r)
r -
protected ImmutableBytesWritable createGroupKey(byte[][] vals)
vals -
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