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1 package alice.jungle.persistence;
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2
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83
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3 import java.io.EOFException;
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4 import java.io.File;
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5 import java.io.FileInputStream;
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6 import java.io.FileNotFoundException;
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7 import java.io.FileOutputStream;
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8 import java.io.IOException;
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9 import java.io.InputStream;
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10 import java.io.OutputStream;
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11 import java.util.Iterator;
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12
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13 import org.msgpack.MessagePack;
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14
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15 import alice.jungle.operations.NetworkTreeOperationLog;
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16
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17 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeList;
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18 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeListReader;
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19 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeListWriter;
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20 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.Journal;
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21 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.Result;
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84
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22 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.ChangeSet;
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23 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation;
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81
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24
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25 public class NetworkJournal implements Journal {
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26
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27 private static final NetworkChangeListWriter WRITER = new NetworkChangeListWriter();
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28 private static final NetworkChangeListReader READER = new NetworkChangeListReader();
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29 private static MessagePack msgpack = new MessagePack();
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30 private static OutputStream out = null;
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31 private static InputStream in = null;
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32
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33 public NetworkJournal() {
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34
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35 }
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36
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37 public NetworkJournal(File file) throws FileNotFoundException {
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38 out = new FileOutputStream(file, true);
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39 in = new FileInputStream(file);
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40 }
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41
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42 @Override
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43 public ChangeListReader getReader() {
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44 return READER;
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45 }
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46 @Override
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47 public ChangeListWriter getWriter() {
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48 return WRITER;
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49 }
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50
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51 public void close() throws IOException {
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52 out.close();
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53 in.close();
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54 }
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55
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56 public void setOutputStream(OutputStream _out) {
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57 out = _out;
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58 }
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59
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60 public OutputStream getOutputStream() {
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61 return out;
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62 }
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63
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64 public void setInputStream(InputStream _in) {
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65 in = _in;
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66 }
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67
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68 public InputStream getInputStream() {
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69 return in;
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70 }
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71
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81
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72 private static class NetworkChangeListWriter implements ChangeListWriter
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73 {
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74 @Override
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75 public Result write(ChangeList _operations)
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76 {
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77 NetworkTreeOperationLog log = new NetworkTreeOperationLog(_operations);
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78 try {
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79 msgpack.write(out, log);
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80 out.flush();
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81 } catch (IOException e) {
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82 return null;
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83 }
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84 return Result.SUCCESS;
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85 }
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84
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86
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87 public Result write(ChangeSet cs)
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88 {
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89 NetworkTreeOperationLog log = new NetworkTreeOperationLog(cs.uuid(),cs.getChangeList());
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90 try {
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91 msgpack.write(out, log);
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92 out.flush();
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93 } catch (IOException e) {
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94 return null;
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95 }
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96 return Result.SUCCESS;
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97 }
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98
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99 }
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100
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101 public static MessagePack getMessagePack() {
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102 return msgpack;
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103 }
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104
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105 private static class NetworkChangeListReader implements ChangeListReader
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106 {
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107
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108
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109 @Override
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110 public ChangeListReader newReader()
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111 {
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112 return this;
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113 }
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114
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115 @Override
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116 public ChangeList read()
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117 {
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118 try {
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119 final NetworkTreeOperationLog readLog = msgpack.read(in, NetworkTreeOperationLog.class);
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120 ChangeList cl = new ChangeList() {
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121 @Override
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122 public Iterator<TreeOperation> iterator() {
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123 return readLog.iterator();
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124 }
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125 };
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126 return cl;
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127 } catch (EOFException e){
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128 // e.printStackTrace();
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129 } catch (IOException e) {
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130 // e.printStackTrace();
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131 }
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81
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132 return null;
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133 }
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134
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135 }
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136 }
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