Under MongoDB java driver Mapreduce command scope; add functions to Scope

Question

Is their a way to Execute a MongoDB map reduce job through the java driver in which you create a scope DBObject that contains functions. I can execute my map reduce configuration in javascript where the passed in scope contains utility functions, but I can't figure out how to do this with the java driver. I setup the scope using mapReduceCommand's `c.addExtraOption("scope",new BasicDBObject().append('average',function(){ return false;}));` However I can't get the mappers/reducers to recognize the scope component 'e.g.' average as a function. If I use quotes, the map reduce context thinks its a String, but if not, I can't seem to make the scope component parse. How does one get a function in the scope component through the java driver? Thanks to Ren's answer, Here is a spring bean configuration to set up a scope for the mongodb java driver with a function. ```

Accepted Answer

The server code automatically converts the map and reduce into Javascript function, but not so with scope. To pass a function in the scope option, you can do this instead:

```
c.addExtraOption("scope", new BasicBSONObject("average",
  new CodeWScope("function(){ return false;}", new BasicBSONObject())));
```

Under MongoDB java driver Mapreduce command scope; add functions to Scope

Solution

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