C# Class MongoDB.MapReduce

Provides a Fluent interface to build and execute Map/Reduce calls.

Inheritance: IDisposable

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Private Properties

Property	Type	Description
RetrieveData	void
TryModify	void

Public Methods

Method	Description
Dispose ( ) : void	Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
Finalize ( Code function ) : MapReduce	Function to apply to all the results when finished.
KeepTemp ( bool keep ) : MapReduce	When true the generated collection is not treated as temporary. Specifying out automatically makes the collection permanent
Limit ( long limit ) : MapReduce	Number of objects to return from collection
Map ( Code function ) : MapReduce	The map function references the variable this to inspect the current object under consideration. A map function must call emit(key,value) at least once, but may be invoked any number of times, as may be appropriate.
Map ( string function ) : MapReduce	The map function references the variable this to inspect the current object under consideration. A map function must call emit(key,value) at least once, but may be invoked any number of times, as may be appropriate.
MapReduce ( IMongoDatabase database, string name, Type rootType ) : System	Initializes a new instance of the MapReduce class.
Out ( Document @out ) : MapReduce	Specifies how to handle the final collection of results
Out ( String name ) : MapReduce	Name of the final collection the results should be stored in. A temporary collection is still used and then renamed to the target name atomically.
Query ( Document query ) : MapReduce	Query filter object
Reduce ( Code function ) : MapReduce	The reduce function receives a key and an array of values. To use, reduce the received values, and return a result. The MapReduce engine may invoke reduce functions iteratively; thus, these functions must be idempotent. If you need to perform an operation only once, use a finalize function.
Reduce ( string function ) : MapReduce	The reduce function receives a key and an array of values. To use, reduce the received values, and return a result. The MapReduce engine may invoke reduce functions iteratively; thus, these functions must be idempotent. If you need to perform an operation only once, use a finalize function.
Scope ( Document scope ) : MapReduce	Document where fields go into javascript global scope
Sort ( Document sort ) : MapReduce	Sort the query. Useful for optimization
Verbose ( bool val ) : MapReduce	Provides statistics on job execution time.

Private Methods

Method	Description
RetrieveData ( ) : void	Retrieves the data.
TryModify ( ) : void	Tries the modify.

Method Details

Dispose() public method

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

public Dispose ( ) : void
return	void

Finalize() public method

Function to apply to all the results when finished.

public Finalize ( Code function ) : MapReduce
function	Code
return	MapReduce

KeepTemp() public method

When true the generated collection is not treated as temporary. Specifying out automatically makes the collection permanent

public KeepTemp ( bool keep ) : MapReduce
keep	bool
return	MapReduce

Limit() public method

Number of objects to return from collection

public Limit ( long limit ) : MapReduce
limit	long
return	MapReduce

Map() public method

The map function references the variable this to inspect the current object under consideration. A map function must call emit(key,value) at least once, but may be invoked any number of times, as may be appropriate.

public Map ( Code function ) : MapReduce
function	Code
return	MapReduce

Map() public method

public Map ( string function ) : MapReduce
function	string
return	MapReduce

MapReduce() public method

Initializes a new instance of the MapReduce class.

public MapReduce ( IMongoDatabase database, string name, Type rootType ) : System
database	IMongoDatabase	The database.
name	string	The name.
rootType	System.Type	Type of the root.
return	System

Out() public method

Specifies how to handle the final collection of results

public Out ( Document @out ) : MapReduce
@out	Document
return	MapReduce

Out() public method

Name of the final collection the results should be stored in.

A temporary collection is still used and then renamed to the target name atomically.

public Out ( String name ) : MapReduce
name	String
return	MapReduce

Query() public method

Query filter object

public Query ( Document query ) : MapReduce
query	Document
return	MapReduce

Reduce() public method

The reduce function receives a key and an array of values. To use, reduce the received values, and return a result.

The MapReduce engine may invoke reduce functions iteratively; thus, these functions must be idempotent. If you need to perform an operation only once, use a finalize function.

public Reduce ( Code function ) : MapReduce
function	Code
return	MapReduce

Reduce() public method

The reduce function receives a key and an array of values. To use, reduce the received values, and return a result.

The MapReduce engine may invoke reduce functions iteratively; thus, these functions must be idempotent. If you need to perform an operation only once, use a finalize function.

public Reduce ( string function ) : MapReduce
function	string
return	MapReduce

Scope() public method

Document where fields go into javascript global scope

public Scope ( Document scope ) : MapReduce
scope	Document
return	MapReduce

Sort() public method

Sort the query. Useful for optimization

public Sort ( Document sort ) : MapReduce
sort	Document
return	MapReduce

Verbose() public method

Provides statistics on job execution time.

public Verbose ( bool val ) : MapReduce
val	bool
return	MapReduce