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Java > Open Source Codes > com > db4o > cs > messages > MReadBlob


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10 Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11 Suite 350, San Mateo, CA 94403, USA.
12
13 db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 package com.db4o.cs.messages;
22
23 import java.io.File JavaDoc;
24 import java.io.FileInputStream JavaDoc;
25 import java.io.IOException JavaDoc;
26
27 import com.db4o.*;
28 import com.db4o.cs.*;
29 import com.db4o.ext.Status;
30 import com.db4o.foundation.network.YapSocket;
31
32
33 public class MReadBlob extends MsgBlob {
34     public void processClient(YapSocket sock) throws IOException JavaDoc {
35         Msg message = Msg.readMessage(transaction(), sock);
36         if (message.equals(Msg.LENGTH)) {
37             try {
38                 _currentByte = 0;
39                 _length = message.payLoad().readInt();
40                 _blob.getStatusFrom(this);
41                 _blob.setStatus(Status.PROCESSING);
42                 copy(sock,this._blob.getClientOutputStream(),_length,true);
43                 message = Msg.readMessage(transaction(), sock);
44                 if (message.equals(Msg.OK)) {
45                     this._blob.setStatus(Status.COMPLETED);
46                 } else {
47                     this._blob.setStatus(Status.ERROR);
48                 }
49             } catch (Exception JavaDoc e) {
50             }
51         } else if (message.equals(Msg.ERROR)) {
52             this._blob.setStatus(Status.ERROR);
53         }
54
55     }
56     public boolean processAtServer(YapServerThread serverThread) {
57         YapStream stream = stream();
58         try {
59             BlobImpl blobImpl = this.serverGetBlobImpl();
60             if (blobImpl != null) {
61                 blobImpl.setTrans(transaction());
62                 File JavaDoc file = blobImpl.serverFile(null, false);
63                 int length = (int) file.length();
64                 YapSocket sock = serverThread.socket();
65                 Msg.LENGTH.getWriterForInt(transaction(), length).write(stream, sock);
66                 FileInputStream JavaDoc fin = new FileInputStream JavaDoc(file);
67                 copy(fin,sock,false);
68                 sock.flush();
69                 Msg.OK.write(stream, sock);
70             }
71         } catch (Exception JavaDoc e) {
72             serverThread.write(Msg.ERROR);
73         }
74         return true;
75     }
76 }
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