root / proj / src / StorageSystem.java @ 1
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| 1 | 1 | up20160559 | import java.io.File; |
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| 2 | import java.io.FileInputStream; |
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| 3 | import java.io.FileOutputStream; |
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| 4 | import java.io.IOException; |
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| 5 | import java.io.ObjectInputStream; |
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| 6 | import java.io.ObjectOutputStream; |
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| 7 | import java.nio.file.Files; |
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| 8 | import java.nio.file.Paths; |
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| 9 | import java.util.ArrayList; |
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| 10 | |||
| 11 | public class StorageSystem{ |
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| 12 | |||
| 13 | private long storage_capacity = 100000000; |
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| 14 | private long used_storage; |
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| 15 | private long space_available = storage_capacity - used_storage; |
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| 16 | private int peerID; |
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| 17 | |||
| 18 | public long getStorage_capacity() { |
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| 19 | return storage_capacity;
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| 20 | } |
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| 21 | |||
| 22 | public long getUsed_storage() { |
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| 23 | return used_storage;
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| 24 | } |
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| 25 | |||
| 26 | public long getSpace_available() { |
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| 27 | return space_available;
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| 28 | } |
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| 29 | |||
| 30 | private ArrayList<Chunk> chunks; |
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| 31 | private ArrayList<FileInfo> fileinfo; |
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| 32 | private ArrayList<BackUpInfo> backupinfo; |
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| 33 | |||
| 34 | public StorageSystem(int peerID) { |
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| 35 | this.peerID = peerID;
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| 36 | used_storage = 0;
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| 37 | chunks = new ArrayList<Chunk>(); |
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| 38 | setFileInfo(new ArrayList<FileInfo>()); |
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| 39 | backupinfo = new ArrayList<BackUpInfo>(); |
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| 40 | |||
| 41 | try {
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| 42 | loadFileInfo(); |
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| 43 | } catch (IOException e) { |
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| 44 | System.out.println("Load File Info Failed:" + e.toString()); |
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| 45 | e.printStackTrace(); |
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| 46 | } |
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| 47 | |||
| 48 | } |
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| 49 | |||
| 50 | public boolean deleteChunk(Chunk c) { |
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| 51 | |||
| 52 | if(isStored(c)) {
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| 53 | |||
| 54 | this.chunks.remove(c);
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| 55 | used_storage= used_storage - c.getsize(); |
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| 56 | return true; |
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| 57 | |||
| 58 | } |
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| 59 | System.out.println("Chunk doesn't exist"); |
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| 60 | return false; |
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| 61 | |||
| 62 | } |
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| 63 | |||
| 64 | |||
| 65 | public boolean addChunk(Chunk c) { |
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| 66 | if(storage_capacity > used_storage + c.getsize()) {
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| 67 | used_storage += c.getsize(); |
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| 68 | |||
| 69 | if(!isStored(c)) {
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| 70 | chunks.add(c); |
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| 71 | return true; |
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| 72 | } |
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| 73 | |||
| 74 | } |
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| 75 | return false; |
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| 76 | } |
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| 77 | |||
| 78 | |||
| 79 | |||
| 80 | public ArrayList<Chunk> getChunks() { |
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| 81 | return chunks;
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| 82 | } |
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| 83 | |||
| 84 | public ArrayList<BackUpInfo> getBackUps() { |
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| 85 | return backupinfo;
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| 86 | } |
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| 87 | |||
| 88 | |||
| 89 | public boolean isStored(Chunk c) { |
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| 90 | |||
| 91 | boolean isEqualChunk = false; |
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| 92 | |||
| 93 | for(int i = 0; i < chunks.size(); i++) { |
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| 94 | if(chunks.get(i).getChunkId() == c.getChunkId()) {
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| 95 | isEqualChunk = true;
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| 96 | } |
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| 97 | } |
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| 98 | |||
| 99 | return isEqualChunk;
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| 100 | } |
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| 101 | |||
| 102 | public void addFile(String filename, long data, String hash) { |
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| 103 | getFileInfo().add(new FileInfo(hash, data, filename, this.peerID)); |
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| 104 | } |
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| 105 | |||
| 106 | |||
| 107 | |||
| 108 | public boolean moreRecent(FileInfo a, FileInfo b) { |
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| 109 | if (a.getDateModified() > b.getDateModified())
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| 110 | return true; // highest value first |
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| 111 | else return false; |
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| 112 | } |
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| 113 | |||
| 114 | public String lookUp(String filename) { |
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| 115 | ArrayList<FileInfo> samename = new ArrayList<FileInfo>(); |
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| 116 | String aux = null; |
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| 117 | FileInfo auxFile = null;
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| 118 | |||
| 119 | for(int i = 0; i < getFileInfo().size(); i++) { |
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| 120 | |||
| 121 | |||
| 122 | |||
| 123 | if(getFileInfo().get(i).getFilename().equals(filename))
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| 124 | samename.add(getFileInfo().get(i)); |
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| 125 | |||
| 126 | } |
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| 127 | |||
| 128 | if(samename.size() == 1) { |
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| 129 | aux = samename.get(0).getFileID();
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| 130 | |||
| 131 | } |
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| 132 | |||
| 133 | else {
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| 134 | for(int j = 0; j < samename.size(); j++) { |
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| 135 | if(moreRecent(samename.get(j), auxFile)){
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| 136 | auxFile = samename.get(j); |
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| 137 | aux = samename.get(j).getFileID(); |
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| 138 | } |
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| 139 | } |
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| 140 | } |
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| 141 | |||
| 142 | |||
| 143 | return aux;
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| 144 | } |
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| 145 | |||
| 146 | |||
| 147 | //"/fileInfo/Peer"+peerID+"/"+fileID
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| 148 | public void serializeFileInfo() { |
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| 149 | |||
| 150 | for(int i = 0; i < this.getFileInfo().size(); i++ ) { |
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| 151 | |||
| 152 | try{
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| 153 | |||
| 154 | File file = new File("fileInfo/Peer"+peerID+"/"+this.getFileInfo().get(i).getFileID()+".ser"); |
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| 155 | |||
| 156 | if (!file.exists()) {
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| 157 | file.getParentFile().mkdirs(); |
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| 158 | file.createNewFile(); |
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| 159 | } |
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| 160 | ObjectOutputStream objoutput = new ObjectOutputStream(new FileOutputStream(file.getPath())); |
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| 161 | objoutput.writeObject(this.getFileInfo().get(i));
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| 162 | |||
| 163 | objoutput.close(); |
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| 164 | } catch (IOException e) { |
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| 165 | // TODO Auto-generated catch block
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| 166 | e.printStackTrace(); |
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| 167 | } |
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| 168 | } |
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| 169 | |||
| 170 | |||
| 171 | } |
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| 172 | |||
| 173 | |||
| 174 | public void loadFileInfo() throws IOException { |
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| 175 | |||
| 176 | if(Files.exists(Paths.get("/fileInfo/Peer"+peerID+"/"))) { |
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| 177 | Files.walk(Paths.get("/fileInfo/Peer"+peerID+"/")) |
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| 178 | .forEach(p -> {
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| 179 | try {
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| 180 | try(ObjectInputStream objinput = new ObjectInputStream(new FileInputStream(p.toString()))){ |
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| 181 | Object obj = objinput.readObject();
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| 182 | |||
| 183 | if(obj instanceof FileInfo) { |
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| 184 | FileInfo fileinforetrieved = (FileInfo) obj; |
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| 185 | this.getFileInfo().add(fileinforetrieved);
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| 186 | } |
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| 187 | } catch (ClassNotFoundException e) { |
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| 188 | // TODO Auto-generated catch block
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| 189 | e.printStackTrace(); |
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| 190 | } |
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| 191 | } catch (IOException e) { |
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| 192 | e.printStackTrace(); |
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| 193 | } |
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| 194 | }); |
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| 195 | } |
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| 196 | |||
| 197 | |||
| 198 | |||
| 199 | } |
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| 200 | |||
| 201 | public ArrayList<FileInfo> getFileInfo() { |
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| 202 | return fileinfo;
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| 203 | } |
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| 204 | |||
| 205 | public void setFileInfo(ArrayList<FileInfo> fileinfo) { |
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| 206 | this.fileinfo = fileinfo;
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| 207 | } |
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| 208 | |||
| 209 | } |