title: Run a simple Cascading application in local mode
body: <p>I'm new to Cascading/Hadoop and am trying to run a simple example in local mode (i.e. in memory).  The example just copies a file:</p>
  
  <pre><code>    import java.util.Properties;
  
      import cascading.flow.Flow;
      import cascading.flow.FlowConnector;
      import cascading.flow.FlowDef;
      import cascading.flow.local.LocalFlowConnector;
      import cascading.pipe.Pipe;
      import cascading.property.AppProps;
      import cascading.scheme.hadoop.TextLine;
      import cascading.tap.Tap;
      import cascading.tap.hadoop.Hfs;
  
      public class CascadingTest {
  
              public static void main(String[] args) {
                  Properties properties = new Properties();
  
  
                  AppProps.setApplicationJarClass( properties, CascadingTest.class );
                  FlowConnector flowConnector = new LocalFlowConnector();
  
                  // create the source tap
                  Tap inTap = new Hfs( new TextLine(), "D:\\git_workspace\\Impatient\\part1\\data\\rain.txt" );
  
              // create the sink tap
              Tap outTap = new Hfs( new TextLine(), "D:\\git_workspace\\Impatient\\part1\\data\\out.txt" );
  
              // specify a pipe to connect the taps
              Pipe copyPipe = new Pipe( "copy" );
  
              // connect the taps, pipes, etc., into a flow
              FlowDef flowDef = FlowDef.flowDef()
                  .addSource( copyPipe, inTap )
                  .addTailSink( copyPipe, outTap );
  
                  // run the flow
              Flow flow = flowConnector.connect( flowDef );
              flow.complete();
          }
      }
  </code></pre>
  
  <p>Here is the error I'm getting:</p>
  
  <pre><code>09-25-12 11:30:38,114 INFO  - AppProps                     - using app.id: 9C82C76AC667FDAA2F6969A0DF3949C6
  Exception in thread "main" cascading.flow.planner.PlannerException: could not build flow from assembly: [java.util.Properties cannot be cast to org.apache.hadoop.mapred.JobConf]
      at cascading.flow.planner.FlowPlanner.handleExceptionDuringPlanning(FlowPlanner.java:515)
      at cascading.flow.local.planner.LocalPlanner.buildFlow(LocalPlanner.java:84)
      at cascading.flow.FlowConnector.connect(FlowConnector.java:454)
      at com.x.y.CascadingTest.main(CascadingTest.java:37)
  Caused by: java.lang.ClassCastException: java.util.Properties cannot be cast to org.apache.hadoop.mapred.JobConf
      at cascading.tap.hadoop.Hfs.sourceConfInit(Hfs.java:78)
      at cascading.flow.local.LocalFlowStep.initTaps(LocalFlowStep.java:77)
      at cascading.flow.local.LocalFlowStep.getInitializedConfig(LocalFlowStep.java:56)
      at cascading.flow.local.LocalFlowStep.createFlowStepJob(LocalFlowStep.java:135)
      at cascading.flow.local.LocalFlowStep.createFlowStepJob(LocalFlowStep.java:38)
      at cascading.flow.planner.BaseFlowStep.getFlowStepJob(BaseFlowStep.java:588)
      at cascading.flow.BaseFlow.initializeNewJobsMap(BaseFlow.java:1162)
      at cascading.flow.BaseFlow.initialize(BaseFlow.java:184)
      at cascading.flow.local.planner.LocalPlanner.buildFlow(LocalPlanner.java:78)
      ... 2 more
  </code></pre>