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 StdErrTap provides a local mode tap for writing data to the {@code stderr} stream. */ 035 public class StdErrTap extends SinkTap<Properties, OutputStream> 036 { 037 public StdErrTap( Scheme<Properties, ?, OutputStream, ?, ?> scheme ) 038 { 039 super( scheme, SinkMode.UPDATE ); 040 } 041 042 @Override 043 public String getIdentifier() 044 { 045 return "stdErr"; 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.err ); 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 }