bundles/org.simantics.acorn/src/org/simantics/acorn/lru/ClusterStreamChunk.java

   1 package org.simantics.acorn.lru;
   2
   3 import java.io.IOException;
   4 import java.nio.ByteBuffer;
   5 import java.nio.file.Path;
   6 import java.util.ArrayList;
   7
   8 import org.simantics.acorn.ClusterManager;
   9 import org.simantics.acorn.Persistable;
  10 import org.simantics.acorn.exception.AcornAccessVerificationException;
  11 import org.simantics.acorn.exception.IllegalAcornStateException;
  12 import org.simantics.acorn.internal.ClusterChange;
  13 import org.simantics.acorn.internal.UndoClusterUpdateProcessor;
  14 import org.simantics.compressions.CompressionCodec;
  15 import org.simantics.compressions.Compressions;
  16 import org.simantics.db.exception.DatabaseException;
  17 import org.simantics.db.service.Bytes;
  18 import org.simantics.utils.datastructures.Pair;
  19
  20 import gnu.trove.list.array.TByteArrayList;
  21
  22 public class ClusterStreamChunk extends LRUObject<String, ClusterStreamChunk> implements Persistable {
  23
  24         // 500KB is a fine chunk
  25         private static int MAX_CHUNK_SIZE = 500*1024;
  26
  27         int size = 0;
  28         final private ClusterManager manager;
  29         private boolean committed = false;
  30
  31         public int nextToProcess = 0;
  32
  33         public ArrayList<ClusterUpdateOperation> operations = new ArrayList<ClusterUpdateOperation>();
  34
  35         // Stub
  36         public ClusterStreamChunk(ClusterManager manager, LRU<String, ClusterStreamChunk> LRU, Path readDir, String id, int offset, int length) throws AcornAccessVerificationException {
  37                 super(LRU, id, readDir, "clusterStream", offset, length, false, false);
  38                 this.manager = manager;
  39                 LRU.map(this);
  40         }
  41
  42         // Creation
  43         public ClusterStreamChunk(ClusterManager manager, LRU<String, ClusterStreamChunk> LRU, String id) throws AcornAccessVerificationException {
  44                 super(LRU, id, LRU.getDirectory(), "clusterStream", true, true);
  45                 this.manager = manager;
  46                 LRU.insert(this, accessTime);
  47         }
  48
  49         public UndoClusterUpdateProcessor getUndoProcessor(ClusterManager clusters, int chunkOffset, String ccsId) throws DatabaseException {
  50
  51                 if(VERIFY) verifyAccess();
  52
  53                 makeResident(true);
  54
  55                 ClusterUpdateOperation op = operations.get(chunkOffset);
  56                 if(op == null) throw new IllegalAcornStateException("Cluster Update Operation " + ccsId + " was not found.");
  57                 if(op.ccs == null) throw new IllegalAcornStateException("Cluster ChangeSet " + ccsId + " was not found.");
  58
  59                 UndoClusterUpdateProcessor proc = new UndoClusterUpdateProcessor(clusters, this, op.ccs);
  60                 if(proc.version != ClusterChange.VERSION)
  61                         return null;
  62
  63                 // This cluster and CCS can still be under preparation => wait
  64                 clusters.clusterLRU.ensureUpdates(proc.getClusterUID());
  65
  66                 proc.process();
  67
  68                 cancelForceResident();
  69
  70                 return proc;
  71
  72         }
  73
  74         public void addOperation(ClusterUpdateOperation op) throws IllegalAcornStateException {
  75                 if(committed)
  76                         throw new IllegalAcornStateException("Cannot add operation " + op + " to " + this + " if commited == true");
  77                 operations.add(op);
  78                 size += op.data.length;
  79 //              if(isCommitted()) {
  80 //                      LRU.refresh(this);
  81 //              }
  82         }
  83
  84         public byte[] getOperation(int index) {
  85                 return operations.get(index).data;
  86         }
  87
  88         public void commit() {
  89                 committed = true;
  90         }
  91
  92         public boolean isCommitted() {
  93                 if(size > MAX_CHUNK_SIZE) committed = true;
  94                 return committed;
  95         }
  96
  97         @Override
  98         public boolean canBePersisted() throws AcornAccessVerificationException {
  99                 if(!super.canBePersisted()) return false;
 100                 if(!isCommitted()) return false;
 101                 for(ClusterUpdateOperation op : operations) {
 102                         if(!op.finished) return false;
 103                 }
 104                 return true;
 105         }
 106
 107         private static void writeLE(TByteArrayList bytes, int value) {
 108
 109                 bytes.add( (byte) (value & 0xFF));
 110                 bytes.add((byte) ((value >>> 8) & 0xFF));
 111                 bytes.add((byte) ((value >>> 16) & 0xFF));
 112                 bytes.add((byte) ((value >>> 24) & 0xFF));
 113
 114         }
 115
 116         final public static void writeLE8(TByteArrayList bytes, long value) {
 117
 118                 bytes.add( (byte) (value & 0xFF));
 119                 bytes.add((byte) ((value >>> 8) & 0xFF));
 120                 bytes.add((byte) ((value >>> 16) & 0xFF));
 121                 bytes.add((byte) ((value >>> 24) & 0xFF));
 122                 bytes.add((byte) ((value >>> 32) & 0xFF));
 123                 bytes.add((byte) ((value >>> 40) & 0xFF));
 124                 bytes.add((byte) ((value >>> 48) & 0xFF));
 125                 bytes.add((byte) ((value >>> 56) & 0xFF));
 126
 127         }
 128
 129         @Override
 130         protected Pair<byte[], Integer> toBytes() {
 131
 132                 assert(isCommitted());
 133
 134                 TByteArrayList raw = new TByteArrayList();
 135
 136                 writeLE(raw, operations.size());
 137
 138                 for(ClusterUpdateOperation op : operations) {
 139
 140                         writeLE(raw, op.data.length);
 141                         raw.add(op.data);
 142                         op.data = null;
 143
 144                         writeLE(raw, op.ccs.statementMask.size());
 145                         raw.add(op.ccs.statementMask.toArray());
 146                         writeLE(raw, op.ccs.oldValueEx.size());
 147                         raw.add(op.ccs.oldValueEx.toArray());
 148                         writeLE(raw, op.ccs.oldValues.size());
 149
 150                         for(byte[] oldValue : op.ccs.oldValues) {
 151                                 int len = (oldValue != null ? oldValue.length : -1);
 152                                 writeLE(raw, len);
 153                                 if(oldValue != null) {
 154                                         raw.add(oldValue);
 155                                 }
 156                         }
 157
 158                 }
 159
 160                 byte[] raw_ = raw.toArray();
 161                 CompressionCodec codec = Compressions.get(Compressions.LZ4);
 162                 ByteBuffer input = ByteBuffer.wrap(raw_);
 163                 ByteBuffer output = ByteBuffer.allocate(raw_.length + raw_.length/8);
 164                 int compressedSize = codec.compressBuffer(input, 0, raw_.length, output, 0);
 165
 166                 // We append inflated size - cannot prepend since decompression cannot handle offsets in input
 167                 final byte[] rawOutput = new byte[compressedSize+4];
 168                 output.get(rawOutput,0,compressedSize);
 169                 Bytes.writeLE(rawOutput, compressedSize, raw_.length);
 170
 171                 release();
 172
 173                 return Pair.make(rawOutput, rawOutput.length);
 174
 175         }
 176
 177         @Override
 178         void release() {
 179
 180                 for(ClusterUpdateOperation op : operations) {
 181                         op.data = null;
 182                         op.ccs = null;
 183                 }
 184
 185         }
 186
 187         static class StreamDecompressor {
 188
 189 //              byte[] decompressBuffer = new byte[1024*1024];
 190
 191                 public synchronized byte[] decompressBuffer(byte[] compressed) throws IOException {
 192
 193                         int deflatedSize = Bytes.readLE4(compressed, compressed.length-4);
 194
 195                         byte[] result = new byte[deflatedSize];
 196
 197 //                      if(decompressBuffer.length < deflatedSize)
 198 //                              decompressBuffer = new byte[Math.max(3*decompressBuffer.length / 2, deflatedSize)];
 199
 200                         CompressionCodec codec = Compressions.get(Compressions.LZ4);
 201
 202                         ByteBuffer input = ByteBuffer.wrap(compressed);
 203                         ByteBuffer output = ByteBuffer.wrap(result);
 204
 205                         int decompressedSize = codec.decompressBuffer(input, 0, compressed.length-4, output, 0, result.length);
 206                         assert(decompressedSize  == deflatedSize);
 207
 208                         return result;
 209
 210                 }
 211
 212
 213         }
 214
 215         private static StreamDecompressor decompressor = new StreamDecompressor();
 216
 217         @Override
 218         public void fromFile(byte[] data_) throws IllegalAcornStateException, AcornAccessVerificationException {
 219
 220                 try {
 221
 222                         byte[] data = decompressor.decompressBuffer(data_);
 223
 224                         operations = new ArrayList<ClusterUpdateOperation>();
 225
 226                         int offset = 0;
 227                         int opLen = Bytes.readLE4(data, offset);
 228                         offset += 4;
 229
 230                         for(int i=0;i<opLen;i++) {
 231
 232                                 int len = Bytes.readLE4(data, offset);
 233                                 offset += 4;
 234                                 byte[] bytes  = new byte[len];
 235                                 System.arraycopy(data, offset, bytes, 0, len);
 236                                 offset += len;
 237
 238                                 ClusterUpdateOperation op = new ClusterUpdateOperation(manager, bytes);
 239
 240                                 String ccsKey = getKey() + "." + i;
 241
 242                                 op.ccs = new ClusterChangeSet(ccsKey, op.uid);
 243                                 op.chunk = this;
 244
 245                                 int statementMaskLen = Bytes.readLE4(data, offset);
 246                                 offset += 4;
 247                                 op.ccs.statementMask = new TByteArrayList(statementMaskLen);
 248                                 for(int j=0;j<statementMaskLen;j++)
 249                                         op.ccs.statementMask.add(data[offset++]);
 250
 251                                 int oldValueExLen = Bytes.readLE4(data, offset);
 252                                 offset += 4;
 253                                 op.ccs.oldValueEx = new TByteArrayList(oldValueExLen);
 254                                 for(int j=0;j<oldValueExLen;j++)
 255                                         op.ccs.oldValueEx.add(data[offset++]);
 256
 257                                 int oldValuesSize = Bytes.readLE4(data, offset);
 258                                 offset += 4;
 259
 260                                 op.ccs.oldValues = new ArrayList<>(oldValuesSize);
 261                                 for(int j=0;j<oldValuesSize;j++) {
 262
 263                                         int oldValueSize = Bytes.readLE4(data, offset);
 264                                         offset += 4;
 265
 266                                         if(oldValueSize == -1) {
 267                                                 op.ccs.oldValues.add(null);
 268                                         } else {
 269                                                 byte[] oldValue = new byte[oldValueSize];
 270                                                 System.arraycopy(data, offset, oldValue, 0, oldValueSize);
 271                                                 offset += oldValueSize;
 272                                                 op.ccs.oldValues.add(oldValue);
 273                                         }
 274
 275                                 }
 276                                 operations.add(op);
 277                         }
 278                 } catch (IOException e) {
 279                         throw new IllegalAcornStateException(e);
 280                 } catch (IllegalAcornStateException | AcornAccessVerificationException e) {
 281             throw e;
 282         }
 283         }
 284
 285         @Override
 286         String getExtension() {
 287                 return "stream";
 288         }
 289
 290         @Override
 291         public String toString() {
 292                 return  "ClusterUpdateOperationChunk " + getKey();
 293         }
 294
 295         @Override
 296         protected boolean overwrite() {
 297                 return false;
 298         }
 299
 300 }