Exemplo n.º 1
0
 public static void main(String[] args) throws Exception {
   fc = new RandomAccessFile("test.dat", "rw").getChannel();
   MappedByteBuffer out = fc.map(FileChannel.MapMode.READ_WRITE, 0, LENGTH);
   for (int i = 0; i < LENGTH; i++) out.put((byte) 'x');
   new LockAndModify(out, 0, 0 + LENGTH / 3);
   new LockAndModify(out, LENGTH / 2, LENGTH / 2 + LENGTH / 4);
 }
Exemplo n.º 2
0
  @Override
  public void setChainHead(StoredBlock chainHead) throws BlockStoreException {
    final MappedByteBuffer buffer = this.buffer;
    if (buffer == null) throw new BlockStoreException("Store closed");

    lock.lock();
    try {
      lastChainHead = chainHead;
      byte[] headHash = chainHead.getHeader().getHash().getBytes();
      buffer.position(8);
      buffer.put(headHash);
    } finally {
      lock.unlock();
    }
  }
Exemplo n.º 3
0
 private void initNewStore(NetworkParameters params) throws Exception {
   byte[] header;
   header = HEADER_MAGIC.getBytes("US-ASCII");
   buffer.put(header);
   // Insert the genesis block.
   lock.lock();
   try {
     setRingCursor(buffer, FILE_PROLOGUE_BYTES);
   } finally {
     lock.unlock();
   }
   Block genesis = params.getGenesisBlock().cloneAsHeader();
   StoredBlock storedGenesis = new StoredBlock(genesis, genesis.getWork(), 0);
   put(storedGenesis);
   setChainHead(storedGenesis);
 }
Exemplo n.º 4
0
  @Override
  public void put(StoredBlock block) throws BlockStoreException {
    final MappedByteBuffer buffer = this.buffer;
    if (buffer == null) throw new BlockStoreException("Store closed");

    lock.lock();
    try {
      int cursor = getRingCursor(buffer);
      if (cursor == getFileSize()) {
        // Wrapped around.
        cursor = FILE_PROLOGUE_BYTES;
      }
      buffer.position(cursor);
      Sha256Hash hash = block.getHeader().getHash();
      notFoundCache.remove(hash);
      buffer.put(hash.getBytes());
      block.serializeCompact(buffer);
      setRingCursor(buffer, buffer.position());
      blockCache.put(hash, block);
    } finally {
      lock.unlock();
    }
  }