/*
* Copyright (c) 2007-2013 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cascading.pattern;
import java.io.File;
import java.util.Properties;
import cascading.flow.Flow;
import cascading.flow.FlowDef;
import cascading.flow.hadoop.HadoopFlowConnector;
import cascading.pattern.pmml.PMMLPlanner;
import cascading.property.AppProps;
import cascading.scheme.hadoop.TextDelimited;
import cascading.tap.Tap;
import cascading.tap.hadoop.Hfs;
import cascading.tuple.Fields;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
public class Main
{
/** @param args */
public static void main( String[] args ) throws RuntimeException
{
String inputPath = args[ 0 ];
String classifyPath = args[ 1 ];
// set up the config properties
Properties properties = new Properties();
AppProps.setApplicationJarClass( properties, Main.class );
HadoopFlowConnector flowConnector = new HadoopFlowConnector( properties );
// create source and sink taps
Tap inputTap = new Hfs( new TextDelimited( true, "\t" ), inputPath );
Tap classifyTap = new Hfs( new TextDelimited( true, "\t" ), classifyPath );
// handle command line options
OptionParser optParser = new OptionParser();
optParser.accepts( "pmml" ).withRequiredArg();
OptionSet options = optParser.parse( args );
// connect the taps, pipes, etc., into a flow
FlowDef flowDef = FlowDef.flowDef()
.setName( "classify" )
.addSource( "input", inputTap )
.addSink( "classify", classifyTap );
// build a Cascading assembly from the PMML description
if( options.hasArgument( "pmml" ) )
{
String pmmlPath = (String) options.valuesOf( "pmml" ).get( 0 );
PMMLPlanner pmmlPlanner = new PMMLPlanner()
.setPMMLInput( new File( pmmlPath ) )
.retainOnlyActiveIncomingFields()
.setDefaultPredictedField( new Fields( "predict", Double.class ) ); // default value if missing from the model
flowDef.addAssemblyPlanner( pmmlPlanner );
}
// write a DOT file and run the flow
Flow classifyFlow = flowConnector.connect( flowDef );
classifyFlow.writeDOT( "dot/classify.dot" );
classifyFlow.complete();
}
}