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1
17
18 package org.apache.avalon.cornerstone.blocks.masterstore;
19
20 import java.io.BufferedOutputStream  ;
21 import java.io.IOException ;
22 import java.io.InputStream ;
23 import java.io.OutputStream ;
24 import java.util.ArrayList ;
25 import java.util.HashMap ;
26 import org.apache.avalon.cornerstone.services.store.StreamRepository;
27
28
35 public class File_Persistent_Stream_Repository
36 extends AbstractFileRepository
37 implements StreamRepository
38 {
39 protected final HashMap m_inputs = new HashMap ();
40 protected final HashMap m_outputs = new HashMap ();
41
42 protected String getExtensionDecorator()
43 {
44 return ".FileStreamStore";
45 }
46
47
50 public synchronized InputStream get( final String key )
51 {
52 try
53 {
54 final ResettableFileInputStream stream =
55 new ResettableFileInputStream( getFile( key ) );
56
57 final Object o = m_inputs.get( key );
58 if( null == o )
59 {
60 m_inputs.put( key, stream );
61 }
62 else if( o instanceof ArrayList )
63 {
64 ( (ArrayList )o ).add( stream );
65 }
66 else
67 {
68 final ArrayList list = new ArrayList ();
69 list.add( o );
70 list.add( stream );
71 m_inputs.put( key, stream );
72 }
73
74 return stream;
75 }
76 catch( final IOException ioe )
77 {
78 final String message = "Exception caught while retrieving a stream ";
79 getLogger().warn( message, ioe );
80 throw new RuntimeException ( message + ": " + ioe );
81 }
82 }
83
84
87 public synchronized OutputStream put( final String key )
88 {
89 try
90 {
91 final OutputStream outputStream = getOutputStream( key );
92 final BufferedOutputStream stream = new BufferedOutputStream ( outputStream );
93
94 final Object o = m_outputs.get( key );
95 if( null == o )
96 {
97 m_outputs.put( key, stream );
98 }
99 else if( o instanceof ArrayList )
100 {
101 ( (ArrayList )o ).add( stream );
102 }
103 else
104 {
105 final ArrayList list = new ArrayList ();
106 list.add( o );
107 list.add( stream );
108 m_outputs.put( key, stream );
109 }
110
111 return stream;
112 }
113 catch( final IOException ioe )
114 {
115 final String message = "Exception caught while storing a stream ";
116 getLogger().warn( message, ioe );
117 throw new RuntimeException ( message + ": " + ioe );
118 }
119 }
120
121 public void remove( final String key )
122 {
123 Object o = m_inputs.remove( key );
124 if( null != o )
125 {
126 if( o instanceof InputStream )
127 {
128 IOUtil.shutdownStream( (InputStream )o );
129 }
130 else
131 {
132 final ArrayList list = (ArrayList )o;
133 final int size = list.size();
134
135 for( int i = 0; i < size; i++ )
136 {
137 IOUtil.shutdownStream( (InputStream )list.get( i ) );
138 }
139 }
140 }
141
142 o = m_outputs.remove( key );
143 if( null != o )
144 {
145 if( o instanceof OutputStream )
146 {
147 IOUtil.shutdownStream( (OutputStream )o );
148 }
149 else
150 {
151 final ArrayList list = (ArrayList )o;
152 final int size = list.size();
153
154 for( int i = 0; i < size; i++ )
155 {
156 IOUtil.shutdownStream( (OutputStream )list.get( 0 ) );
157 }
158 }
159 }
160
161 super.remove( key );
162 }
163 }
164
165
166 |
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