MapReduceStatistics (mongo-java-driver 3.12.10 API)乐学网一站式学习平台

java.lang.Object
- com.mongodb.operation.MapReduceStatistics

```
@Deprecated
public class MapReduceStatistics
extends Object
```
Deprecated.

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

Since:

3.0

Constructor Summary

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

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`int`	`getDuration()`	Deprecated. Get the amount of time it took to run the map-reduce.
`int`	`getEmitCount()`	Deprecated. Get the number of messages emitted from the provided map function.
`int`	`getInputCount()`	Deprecated. Get the number of documents that were input into the map reduce operation
`int`	`getOutputCount()`	Deprecated. 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)
```
    Deprecated.
    
    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()
```
    Deprecated.
    
    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()
```
    Deprecated.
    
    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()
```
    Deprecated.
    
    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()
```
    Deprecated.
    
    Get the amount of time it took to run the map-reduce.
    
    Returns:
    
    the duration in milliseconds