com.mongodb.client.model.MapReduceAction Java Examples

The following examples show how to use com.mongodb.client.model.MapReduceAction. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: MongoCollectionMapReduce.java    From openbd-core with GNU General Public License v3.0 4 votes vote down vote up 
public cfData execute(cfSession _session, cfArgStructData argStruct ) throws cfmRunTimeException {
	MongoDatabase	db	= getMongoDatabase( _session, argStruct );
	
	String collection	= getNamedStringParam(argStruct, "collection", null);
	if ( collection == null )
		throwException(_session, "please specify a collection");
	
	String map	= getNamedStringParam(argStruct, "map", null );
	if ( map == null )
		throwException(_session, "please specify a map");
	
	String reduce	= getNamedStringParam(argStruct, "reduce", null );
	if ( reduce == null )
		throwException(_session, "please specify a reduce");
	
	String outputcollection	= getNamedStringParam(argStruct, "outputcollection", null );
	if ( outputcollection == null )
		throwException(_session, "please specify a outputcollection");
	
	String action		= getNamedStringParam(argStruct, "type", "replace" ).toLowerCase();
	String finalize	= getNamedStringParam(argStruct, "finalize", null );
	cfData	query		= getNamedParam(argStruct, "query", null );
	
	try{
		MapReduceIterable<Document>	mi	= db.getCollection( collection ).mapReduce( map, reduce );
		
		if ( query != null )
			mi.filter( getDocument( query ) );
		
		if ( finalize != null )
			mi.finalizeFunction( finalize );
		
		mi.collectionName( outputcollection );
		mi.action( MapReduceAction.valueOf( action ) );
		
		
		// Kick start the map reduce
		mi.first();
		
		return cfBooleanData.TRUE;

	} catch (MongoException me){
		throwException(_session, me.getMessage());
		return null;
	}
}