Defines the signature for a reducer class, which is used to perform the reduce step of a MapReduce operation. A reducer ingests the value list for a key and emits key-value pairs that are written to the output named map.
Assembly: soss_namedcache (in soss_namedcache.dll) Version: 220.127.116.11
[SerializableAttribute] public abstract class Reducer<MK, MV, OK, OV>
<SerializableAttribute> Public MustInherit Class Reducer(Of MK, MV, OK, OV)
- Map output (intermediate) key type.
- Map output (intermediate) value type.
- Output key type.
- Output value type.
Thetype exposes the following members.
|ReducerMK, MV, OK, OV|
Initializes a new instance of theclass
Performs optional cleanup operations after the Reduce(MK, IEnumerableMV, IContextOK, OV) method is invoked.
Determines whether the specified object is equal to the current object.(Inherited from Object.)
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)
Serves as the default hash function.(Inherited from Object.)
Gets the Type of the current instance.(Inherited from Object.)
Creates a shallow copy of the current Object.(Inherited from Object.)
Performs the reduce step for single key and the list of values for that key.
Performs optional setup operations before the Reduce(MK, IEnumerableMV, IContextOK, OV) method is invoked.
Returns a string that represents the current object.(Inherited from Object.)