/*
* Copyright (c) 2007-2014 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.scheme.hadoop;
import cascading.PlatformTestCase;
import cascading.cascade.Cascade;
import cascading.cascade.CascadeConnector;
import cascading.flow.Flow;
import cascading.operation.expression.ExpressionFunction;
import cascading.pipe.Each;
import cascading.pipe.Pipe;
import cascading.tap.SinkMode;
import cascading.tap.Tap;
import cascading.tap.hadoop.Hfs;
import cascading.tuple.Fields;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.junit.Test;
import static data.InputData.inputFileApache;
public class WritableSequenceFilePlatformTest extends PlatformTestCase
{
public WritableSequenceFilePlatformTest()
{
super( true );
}
@Test
public void testWritable() throws Exception
{
getPlatform().copyFromLocal( inputFileApache );
Tap source = new Hfs( new TextLine( new Fields( "offset", "line" ) ), inputFileApache );
Pipe pipe = new Pipe( "keyvalue" );
pipe = new Each( pipe, new Fields( "offset" ), new ExpressionFunction( Fields.ARGS, "new org.apache.hadoop.io.LongWritable($0)", long.class ), Fields.REPLACE );
pipe = new Each( pipe, new Fields( "line" ), new ExpressionFunction( Fields.ARGS, "new org.apache.hadoop.io.Text($0)", String.class ), Fields.REPLACE );
Tap tapKeyValue = new Hfs( new WritableSequenceFile( new Fields( "offset", "line" ), LongWritable.class, Text.class ), getOutputPath( "keyvalue" ), SinkMode.REPLACE );
Tap tapKey = new Hfs( new WritableSequenceFile( new Fields( "offset" ), LongWritable.class, null ), getOutputPath( "key" ), SinkMode.REPLACE );
Tap tapValue = new Hfs( new WritableSequenceFile( new Fields( "line" ), Text.class ), getOutputPath( "value" ), SinkMode.REPLACE );
Flow flowKeyValue = getPlatform().getFlowConnector( getProperties() ).connect( source, tapKeyValue, pipe );
Flow flowKey = getPlatform().getFlowConnector( getProperties() ).connect( tapKeyValue, tapKey, new Pipe( "key" ) );
Flow flowValue = getPlatform().getFlowConnector( getProperties() ).connect( tapKeyValue, tapValue, new Pipe( "value" ) );
Cascade cascade = new CascadeConnector().connect( "keyvalues", flowKeyValue, flowKey, flowValue );
cascade.complete();
validateLength( flowKeyValue, 10, 2 );
validateLength( flowKey, 10, 1 );
validateLength( flowValue, 10, 1 );
}
}