001    /*
002     * Copyright (c) 2007-2015 Concurrent, Inc. All Rights Reserved.
003     *
004     * Project and contact information: http://www.cascading.org/
005     *
006     * This file is part of the Cascading project.
007     *
008     * Licensed under the Apache License, Version 2.0 (the "License");
009     * you may not use this file except in compliance with the License.
010     * You may obtain a copy of the License at
011     *
012     *     http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing, software
015     * distributed under the License is distributed on an "AS IS" BASIS,
016     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017     * See the License for the specific language governing permissions and
018     * limitations under the License.
019     */
020    
021    package cascading.tap.local;
022    
023    import java.io.IOException;
024    import java.io.OutputStream;
025    import java.util.Properties;
026    
027    import cascading.flow.FlowProcess;
028    import cascading.scheme.Scheme;
029    import cascading.tap.SinkMode;
030    import cascading.tap.SinkTap;
031    import cascading.tuple.TupleEntryCollector;
032    import cascading.tuple.TupleEntrySchemeCollector;
033    
034    /** Class StdOutTap provides a local mode tap for writing data to the {@code stdout} stream. */
035    public class StdOutTap extends SinkTap<Properties, OutputStream>
036      {
037      public StdOutTap( Scheme<Properties, ?, OutputStream, ?, ?> scheme )
038        {
039        super( scheme, SinkMode.UPDATE );
040        }
041    
042      @Override
043      public String getIdentifier()
044        {
045        return "stdOut";
046        }
047    
048      @Override
049      public TupleEntryCollector openForWrite( FlowProcess<Properties> flowProcess, OutputStream output ) throws IOException
050        {
051        return new TupleEntrySchemeCollector<Properties, OutputStream>( flowProcess, getScheme(), System.out );
052        }
053    
054      @Override
055      public boolean createResource( Properties conf ) throws IOException
056        {
057        return true;
058        }
059    
060      @Override
061      public boolean deleteResource( Properties conf ) throws IOException
062        {
063        return false;
064        }
065    
066      @Override
067      public boolean resourceExists( Properties conf ) throws IOException
068        {
069        return true;
070        }
071    
072      @Override
073      public long getModifiedTime( Properties conf ) throws IOException
074        {
075        return 0;
076        }
077      }