Examples of org.syncany.chunk.MultiChunker

org.syncany.chunk.MultiChunker

A multichunker combines a set of {@link Chunk}s into a single file. It can be implemented by a simple container or archive format. The multichunker is used by the {@link Deduper}to write multichunks, and by other parts of the application to read multichunks and re-assemble files.

The class supports two modes:

When writing a {@link MultiChunker}, the {@link #createMultiChunk(byte[],OutputStream)}must be used. The method emits a new implementation-specific {@link MultiChunk} to which new chunks can be added/written to.
When reading a multichunk from a file or input stream, the {@link #createMultiChunk(InputStream)}or {@link #createMultiChunk(File)} must be used. The emitted multichunk object can be read from.

Important: Implementations must make sure that when providing a readable multichunk, the individual chunk objects must be randomly accessible. A sequential read (like with TAR, for instance), is not sufficient for the quick processing required in the application. @author Philipp C. Heckel

      return reconstructedFileInCache;
    }
        
    // Create non-empty file
    Chunker chunker = config.getChunker();
    MultiChunker multiChunker = config.getMultiChunker();
    
    FileOutputStream reconstructedFileOutputStream = new FileOutputStream(reconstructedFileInCache);    
    MessageDigest reconstructedFileChecksum = MessageDigest.getInstance(chunker.getChecksumAlgorithm());
    
    if (fileContent != null) { // File can be empty!
      Collection<ChunkChecksum> fileChunks = fileContent.getChunks();


      for (ChunkChecksum chunkChecksum : fileChunks) {
        MultiChunkId multiChunkIdForChunk = localDatabase.getMultiChunkId(chunkChecksum);


        if (multiChunkIdForChunk == null && memoryDatabase != null) {
          multiChunkIdForChunk = memoryDatabase.getMultiChunkIdForChunk(chunkChecksum);
        }


        File decryptedMultiChunkFile = config.getCache().getDecryptedMultiChunkFile(multiChunkIdForChunk);


        MultiChunk multiChunk = multiChunker.createMultiChunk(decryptedMultiChunkFile);
        InputStream chunkInputStream = multiChunk.getChunkInputStream(chunkChecksum.getBytes());


            byte[] buffer = new byte[4096];
            int read = 0;

Examples of org.syncany.chunk.MultiChunker

Related Classes of org.syncany.chunk.MultiChunker