public class ValueAggregatorBaseDescriptor extends java.lang.Object implements ValueAggregatorDescriptor
Modifier and Type | Field and Description |
---|---|
static java.lang.String |
DOUBLE_VALUE_SUM |
java.lang.String |
inputFile |
static java.lang.String |
LONG_VALUE_MAX |
static java.lang.String |
LONG_VALUE_MIN |
static java.lang.String |
LONG_VALUE_SUM |
static java.lang.String |
STRING_VALUE_MAX |
static java.lang.String |
STRING_VALUE_MIN |
static java.lang.String |
UNIQ_VALUE_COUNT |
static java.lang.String |
VALUE_HISTOGRAM |
ONE, TYPE_SEPARATOR
Constructor and Description |
---|
ValueAggregatorBaseDescriptor() |
Modifier and Type | Method and Description |
---|---|
void |
configure(JobConf job)
get the input file name.
|
static java.util.Map.Entry<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text> |
generateEntry(java.lang.String type,
java.lang.String id,
org.apache.hadoop.io.Text val) |
java.util.ArrayList<java.util.Map.Entry<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>> |
generateKeyValPairs(java.lang.Object key,
java.lang.Object val)
Generate 1 or 2 aggregation-id/value pairs for the given key/value pair.
|
static ValueAggregator |
generateValueAggregator(java.lang.String type) |
public static final java.lang.String UNIQ_VALUE_COUNT
public static final java.lang.String LONG_VALUE_SUM
public static final java.lang.String DOUBLE_VALUE_SUM
public static final java.lang.String VALUE_HISTOGRAM
public static final java.lang.String LONG_VALUE_MAX
public static final java.lang.String LONG_VALUE_MIN
public static final java.lang.String STRING_VALUE_MAX
public static final java.lang.String STRING_VALUE_MIN
public java.lang.String inputFile
public static java.util.Map.Entry<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text> generateEntry(java.lang.String type, java.lang.String id, org.apache.hadoop.io.Text val)
type
- the aggregation typeid
- the aggregation idval
- the val associated with the id to be aggregatedpublic static ValueAggregator generateValueAggregator(java.lang.String type)
type
- the aggregation typepublic java.util.ArrayList<java.util.Map.Entry<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>> generateKeyValPairs(java.lang.Object key, java.lang.Object val)
generateKeyValPairs
in interface ValueAggregatorDescriptor
key
- input keyval
- input valuepublic void configure(JobConf job)
configure
in interface ValueAggregatorDescriptor
job
- a job configuration objectCopyright © 2009 The Apache Software Foundation