com.mongodb.operation

Class MapReduceStatistics

java.lang.Object

com.mongodb.operation.MapReduceStatistics

public class MapReduceStatistics
extends Object

Common statistics returned by running all types of map-reduce operations.

Since:

3.0

Constructor Summary

Constructors

Constructor and Description
MapReduceStatistics(int inputCount, int outputCount, int emitCount, int duration) Construct a new instance.

Method Summary

Modifier and Type	Method and Description
int	getDuration() Get the amount of time it took to run the map-reduce.
int	getEmitCount() Get the number of messages emitted from the provided map function.
int	getInputCount() Get the number of documents that were input into the map reduce operation
int	getOutputCount() Get the number of documents generated as a result of this map reduce

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MapReduceStatistics

public MapReduceStatistics(int inputCount,
                           int outputCount,
                           int emitCount,
                           int duration)

Construct a new instance.

Parameters:

inputCount - the input count.

outputCount - the output count.

emitCount - the emit count.

duration - the duration.

Method Detail

getInputCount

public int getInputCount()

Get the number of documents that were input into the map reduce operation

Returns:

the number of documents that read while processing this map reduce

getOutputCount

public int getOutputCount()

Get the number of documents generated as a result of this map reduce

Returns:

the number of documents output by the map reduce

getEmitCount

public int getEmitCount()

Get the number of messages emitted from the provided map function.

Returns:

the number of items emitted from the map function

getDuration

public int getDuration()

Get the amount of time it took to run the map-reduce.

Returns:

the duration in milliseconds