MapReduceWithInlineResultsOperation (mongo-java-driver 3.3.0-query-log-max-size API)

java.lang.Object
- com.mongodb.operation.MapReduceWithInlineResultsOperation<T>

类型参数:

T - the operations result type.

所有已实现的接口:

AsyncReadOperation<MapReduceAsyncBatchCursor<T>>, ReadOperation<MapReduceBatchCursor<T>>
```
public class MapReduceWithInlineResultsOperation<T>
extends java.lang.Object
implements AsyncReadOperation<MapReduceAsyncBatchCursor<T>>, ReadOperation<MapReduceBatchCursor<T>>
```
Operation that runs a Map Reduce against a MongoDB instance. This operation only supports "inline" results, i.e. the results will be returned as a result of running this operation.

To run a map reduce operation into a given collection, use MapReduceToCollectionOperation.

从以下版本开始:

3.0

MongoDB documentation

mapReduce

Map-Reduce

构造器概要

构造器
构造器和说明
`MapReduceWithInlineResultsOperation(MongoNamespace namespace, BsonJavaScript mapFunction, BsonJavaScript reduceFunction, Decoder<T> decoder)` Construct a MapReduceOperation with all the criteria it needs to execute.

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`ReadOperation<BsonDocument>`	`asExplainableOperation(ExplainVerbosity explainVerbosity)` Gets an operation whose execution explains this operation.
`AsyncReadOperation<BsonDocument>`	`asExplainableOperationAsync(ExplainVerbosity explainVerbosity)` Gets an operation whose execution explains this operation.
`MapReduceBatchCursor<T>`	`execute(ReadBinding binding)` Executing this will return a cursor with your results and the statistics in.
`void`	`executeAsync(AsyncReadBinding binding, SingleResultCallback<MapReduceAsyncBatchCursor<T>> callback)` General execute which can return anything of type T
`MapReduceWithInlineResultsOperation<T>`	`filter(BsonDocument filter)` Sets the filter to apply to the query.
`MapReduceWithInlineResultsOperation<T>`	`finalizeFunction(BsonJavaScript finalizeFunction)` Sets the JavaScript function that follows the reduce method and modifies the output.
`BsonDocument`	`getFilter()` Gets the query filter.
`BsonJavaScript`	`getFinalizeFunction()` Gets the JavaScript function that follows the reduce method and modifies the output.
`int`	`getLimit()` Gets the limit to apply.
`BsonJavaScript`	`getMapFunction()` Gets the JavaScript function that associates or "maps" a value with a key and emits the key and value pair.
`long`	`getMaxTime(java.util.concurrent.TimeUnit timeUnit)` Gets the maximum execution time on the server for this operation.
`ReadConcern`	`getReadConcern()` Gets the read concern
`BsonJavaScript`	`getReduceFunction()` Gets the JavaScript function that "reduces" to a single object all the values associated with a particular key.
`BsonDocument`	`getScope()` Gets the global variables that are accessible in the map, reduce and finalize functions.
`BsonDocument`	`getSort()` Gets the sort criteria to apply to the query.
`boolean`	`isJsMode()` Gets the flag that specifies whether to convert intermediate data into BSON format between the execution of the map and reduce functions.
`boolean`	`isVerbose()` Gets whether to include the timing information in the result information.
`MapReduceWithInlineResultsOperation<T>`	`jsMode(boolean jsMode)` Sets the flag that specifies whether to convert intermediate data into BSON format between the execution of the map and reduce functions.
`MapReduceWithInlineResultsOperation<T>`	`limit(int limit)` Sets the limit to apply.
`MapReduceWithInlineResultsOperation<T>`	`maxTime(long maxTime, java.util.concurrent.TimeUnit timeUnit)` Sets the maximum execution time on the server for this operation.
`MapReduceWithInlineResultsOperation<T>`	`readConcern(ReadConcern readConcern)` Sets the read concern
`MapReduceWithInlineResultsOperation<T>`	`scope(BsonDocument scope)` Sets the global variables that are accessible in the map, reduce and finalize functions.
`MapReduceWithInlineResultsOperation<T>`	`sort(BsonDocument sort)` Sets the sort criteria to apply to the query.
`MapReduceWithInlineResultsOperation<T>`	`verbose(boolean verbose)` Sets whether to include the timing information in the result information.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - MapReduceWithInlineResultsOperation
```
public MapReduceWithInlineResultsOperation(MongoNamespace namespace,
                                           BsonJavaScript mapFunction,
                                           BsonJavaScript reduceFunction,
                                           Decoder<T> decoder)
```
    Construct a MapReduceOperation with all the criteria it needs to execute.
    
    参数:
    
    namespace - the database and collection namespace for the operation.
    
    mapFunction - a JavaScript function that associates or "maps" a value with a key and emits the key and value pair.
    
    reduceFunction - a JavaScript function that "reduces" to a single object all the values associated with a particular key.
    
    decoder - the decoder for the result documents.
    
    MongoDB documentation
    
    mapReduce
- 方法详细资料
  - getMapFunction
```
public BsonJavaScript getMapFunction()
```
    Gets the JavaScript function that associates or "maps" a value with a key and emits the key and value pair.
    
    返回:
    
    the JavaScript function that associates or "maps" a value with a key and emits the key and value pair.
  - getReduceFunction
```
public BsonJavaScript getReduceFunction()
```
    Gets the JavaScript function that "reduces" to a single object all the values associated with a particular key.
    
    返回:
    
    the JavaScript function that "reduces" to a single object all the values associated with a particular key.
  - getFinalizeFunction
```
public BsonJavaScript getFinalizeFunction()
```
    Gets the JavaScript function that follows the reduce method and modifies the output. Default is null
    
    返回:
    
    the JavaScript function that follows the reduce method and modifies the output.
    
    MongoDB documentation
    
    Requirements for the finalize Function
  - finalizeFunction
```
public MapReduceWithInlineResultsOperation<T> finalizeFunction(BsonJavaScript finalizeFunction)
```
    Sets the JavaScript function that follows the reduce method and modifies the output.
    
    参数:
    
    finalizeFunction - the JavaScript function that follows the reduce method and modifies the output.
    
    返回:
    
    this
    
    MongoDB documentation
    
    Requirements for the finalize Function
  - getScope
```
public BsonDocument getScope()
```
    Gets the global variables that are accessible in the map, reduce and finalize functions.
    
    返回:
    
    the global variables that are accessible in the map, reduce and finalize functions.
    
    MongoDB documentation
    
    Scope
  - scope
```
public MapReduceWithInlineResultsOperation<T> scope(BsonDocument scope)
```
    Sets the global variables that are accessible in the map, reduce and finalize functions.
    
    参数:
    
    scope - the global variables that are accessible in the map, reduce and finalize functions.
    
    返回:
    
    this
    
    MongoDB documentation
    
    mapReduce
  - getFilter
```
public BsonDocument getFilter()
```
    Gets the query filter.
    
    返回:
    
    the query filter
    
    MongoDB documentation
    
    Filter
  - filter
```
public MapReduceWithInlineResultsOperation<T> filter(BsonDocument filter)
```
    Sets the filter to apply to the query.
    
    参数:
    
    filter - the filter to apply to the query.
    
    返回:
    
    this
    
    MongoDB documentation
    
    Filter
  - getSort
```
public BsonDocument getSort()
```
    Gets the sort criteria to apply to the query. The default is null, which means that the documents will be returned in an undefined order.
    
    返回:
    
    a document describing the sort criteria
    
    MongoDB documentation
    
    Sort
  - sort
```
public MapReduceWithInlineResultsOperation<T> sort(BsonDocument sort)
```
    Sets the sort criteria to apply to the query.
    
    参数:
    
    sort - the sort criteria, which may be null.
    
    返回:
    
    this
    
    MongoDB documentation
    
    Sort
  - getLimit
```
public int getLimit()
```
    Gets the limit to apply. The default is null.
    
    返回:
    
    the limit
    
    MongoDB documentation
    
    Limit
  - limit
```
public MapReduceWithInlineResultsOperation<T> limit(int limit)
```
    Sets the limit to apply.
    
    参数:
    
    limit - the limit, which may be null
    
    返回:
    
    this
    
    MongoDB documentation
    
    Limit
  - isJsMode
```
public boolean isJsMode()
```
    Gets the flag that specifies whether to convert intermediate data into BSON format between the execution of the map and reduce functions. Defaults to false.
    
    返回:
    
    jsMode
    
    MongoDB documentation
    
    mapReduce
  - jsMode
```
public MapReduceWithInlineResultsOperation<T> jsMode(boolean jsMode)
```
    Sets the flag that specifies whether to convert intermediate data into BSON format between the execution of the map and reduce functions. Defaults to false.
    
    参数:
    
    jsMode - the flag that specifies whether to convert intermediate data into BSON format between the execution of the map and reduce functions
    
    返回:
    
    jsMode
    
    MongoDB documentation
    
    mapReduce
  - isVerbose
```
public boolean isVerbose()
```
    Gets whether to include the timing information in the result information. Defaults to true.
    
    返回:
    
    whether to include the timing information in the result information
  - verbose
```
public MapReduceWithInlineResultsOperation<T> verbose(boolean verbose)
```
    Sets whether to include the timing information in the result information.
    
    参数:
    
    verbose - whether to include the timing information in the result information.
    
    返回:
    
    this
  - getMaxTime
```
public long getMaxTime(java.util.concurrent.TimeUnit timeUnit)
```
    Gets the maximum execution time on the server for this operation. The default is 0, which places no limit on the execution time.
    
    参数:
    
    timeUnit - the time unit to return the result in
    
    返回:
    
    the maximum execution time in the given time unit
    
    MongoDB documentation
    
    Max Time
  - maxTime
```
public MapReduceWithInlineResultsOperation<T> maxTime(long maxTime,
                                                      java.util.concurrent.TimeUnit timeUnit)
```
    Sets the maximum execution time on the server for this operation.
    
    参数:
    
    maxTime - the max time
    
    timeUnit - the time unit, which may not be null
    
    返回:
    
    this
    
    MongoDB documentation
    
    Max Time
  - getReadConcern
```
public ReadConcern getReadConcern()
```
    Gets the read concern
    
    返回:
    
    the read concern
    
    从以下版本开始:
    
    3.2
    
    MongoDB documentation
    
    Read Concern
  - readConcern
```
public MapReduceWithInlineResultsOperation<T> readConcern(ReadConcern readConcern)
```
    Sets the read concern
    
    参数:
    
    readConcern - the read concern
    
    返回:
    
    this
    
    从以下版本开始:
    
    3.2
    
    MongoDB documentation
    
    Read Concern
  - execute
```
public MapReduceBatchCursor<T> execute(ReadBinding binding)
```
    Executing this will return a cursor with your results and the statistics in.
    
    指定者:
    
    execute 在接口中 ReadOperation<MapReduceBatchCursor<T>>
    
    参数:
    
    binding - the binding
    
    返回:
    
    a MapReduceCursor that can be iterated over to find all the results of the Map Reduce operation.
  - executeAsync
```
public void executeAsync(AsyncReadBinding binding,
                         SingleResultCallback<MapReduceAsyncBatchCursor<T>> callback)
```
    从接口复制的说明: AsyncReadOperation
    
    General execute which can return anything of type T
    
    指定者:
    
    executeAsync 在接口中 AsyncReadOperation<MapReduceAsyncBatchCursor<T>>
    
    参数:
    
    binding - the binding to execute in the context of
    
    callback - the callback to be called when the operation has been executed
  - asExplainableOperation
```
public ReadOperation<BsonDocument> asExplainableOperation(ExplainVerbosity explainVerbosity)
```
    Gets an operation whose execution explains this operation.
    
    参数:
    
    explainVerbosity - the explain verbosity
    
    返回:
    
    a read operation that when executed will explain this operation
  - asExplainableOperationAsync
```
public AsyncReadOperation<BsonDocument> asExplainableOperationAsync(ExplainVerbosity explainVerbosity)
```
    Gets an operation whose execution explains this operation.
    
    参数:
    
    explainVerbosity - the explain verbosity
    
    返回:
    
    a read operation that when executed will explain this operation

类 MapReduceWithInlineResultsOperation<T>

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

MapReduceWithInlineResultsOperation

方法详细资料

getMapFunction

getReduceFunction

getFinalizeFunction

finalizeFunction

getScope

scope

getFilter

filter

getSort

sort

getLimit

limit

isJsMode

jsMode

isVerbose

verbose

getMaxTime

maxTime

getReadConcern

readConcern

execute

executeAsync

asExplainableOperation

asExplainableOperationAsync