Examples of org.jcoredb.fs.Block

org.jcoredb.fs.Block
A block is an array of bytes with a fixed size. It can be referenced by it's id. @author david.maier@jcoredb.org

    
    BlockId blockId = new BlockId(containerId, segmentId, id);
    
    try
    {
      Block block = fs.read(blockId);
      
      JSONNode root = JSONHelper.createSuccessNode();
      JSONAttribute containerId = new JSONAttribute("containerId", ""+blockId.getContainerId(), AttrType.Number);
      JSONAttribute segmentId = new JSONAttribute("segmentId", ""+blockId.getSegmentId(), AttrType.Number);
      JSONAttribute id = new JSONAttribute("blockId", ""+blockId.getId(), AttrType.Number);
      JSONAttribute data = new JSONAttribute("data", Base64.encodeBase64String(block.getBytes()),AttrType.String);
      root.add(containerId);
      root.add(segmentId);
      root.add(id);
      root.add(data);

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    String testStr = "<test> <content> Hello world! </content> </test>";
    byte[] content = testStr.getBytes();
    
    for (int i = 0; i < NUM_OF_BLOCKS_TO_APPEND; i++) {


      Block b = new Block(new BlockId(0));
      b.setBytes(content);      
      blocks[i] = b;
    }


    long startMs = System.currentTimeMillis();

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    String testStr = "<test> <content> Hello world! </content> </test>";
    byte[] content = testStr.getBytes();
    
    for (int i = 0; i < NUM_OF_BLOCKS_TO_APPEND; i++) {


      Block b = new Block(new BlockId(0));
      b.setBytes(content);      
      blocks[i] = b;
    }


    long startMs = System.currentTimeMillis();

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  public Block read(BlockId id) throws BlockReadErr, SegmentGetErr
  {
    IContainer c = containers.get(id.getContainerId());
    DataSegment seg = (DataSegment) c.getSegment(id.getSegmentId());


    Block b =  seg.readBlock(id.getId());
    
    if (b!=null) b.setId(id);
    
    return b;
  }

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    IFileSystem fs = new FileSystem(Constants.ROOT_PATH);
    fs.create(0);
    fs.open();
    
    Block b = new Block(new BlockId(0));
    byte[] content = "<test> <content> Hello world! </content> </test>".getBytes();
    b.setBytes(content);
    
    Block b2 = new Block(new BlockId(0));
    b.setBytes(content);
    
    BlockId bid = fs.append(b, false);
    BlockId bid2 = fs.append(b2, false);

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    ArrayList<Block> blocks = new ArrayList<Block>();
    ArrayList<BlockId> blockIds = new ArrayList<BlockId>();
    
    for (int i = 0; i < 200; i++) {


      Block b = new Block(new BlockId(0));
      byte[] content = "<test> <content> Hello world! </content> </test>".getBytes();
      b.setBytes(content);
      
      blocks.add(b);
      
      BlockId bid = fs.append(b, false);


      blockIds.add(bid);
    }


    BlockId toDelete = blockIds.get(100);
    
    fs.delete(toDelete, true);
    
    Block b = fs.read(toDelete);
    
    assertEquals(null, b);
    
    fs.close();
  }

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      DataSegment seg = segments.get(blockId.getSegmentId());


      seg.getHeader().setFree(blockId.getId(), false);


      if (!soft) {
        Block emptyBlock = new Block(blockId);
        seg.writeBlock(emptyBlock);


        // Check if the segments runs empty and delete it
        if (seg.getHeader().isEmpty()) {
          segments.remove(seg);

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    String testStr = "<test> <content> Hello world! </content> </test>";
    byte[] content = testStr.getBytes();
    
    for (int i = 0; i < 200; i++) {


      Block b = new Block(new BlockId(0));
      b.setBytes(content);
      
      blocks.add(b);
      
      BlockId bid = fs.append(b, false);


      blockIds.add(bid);
    }


        
    Block b = fs.read(new BlockId(0,0,111));
    
    assertEquals(testStr, new String(b.getBytes()).substring(0, testStr.length()));
    
    fs.close();
  }

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    String testStr = "<test> <content> Hello world! </content> </test>";
    byte[] content = testStr.getBytes();
    
    for (int i = 0; i < 200; i++) {


      Block b = new Block(new BlockId(0));
      b.setBytes(content);
      
      blocks.add(b);
      
      BlockId bid = fs.append(b, false);


      blockIds.add(bid);
    }
    
    String newTestStr = "<test> <content> Hello world, again! </content> </test>";
    byte[] newContent = newTestStr.getBytes();
  
    Block b = new Block(blockIds.get(78));
    b.setBytes(newContent);
    fs.write(b);
    
    
    Block rB = fs.read(blockIds.get(78));
    
    assertEquals(newTestStr, new String(rB.getBytes()).substring(0, newTestStr.length()));  
  }

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  public void create() {
    
    IFileSystem fs = FileSystemRegistry.get(new FileSystemRegKey("localhost", Configs.getFSConfig().getRootDir()));
    
    BlockId blockId = new BlockId(containerId);
    Block block = new Block(blockId);
    block.setBytes(data);
    
    try
    {
      blockId = fs.append(block, only);

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Related Classes of org.jcoredb.fs.Block

org.jcoredb.fs.impl.Container

org.jcoredb.fs.impl.DataSegment

org.jcoredb.fs.impl.FileSystem

org.jcoredb.fs.service.http.AppendBlockResource

org.jcoredb.fs.service.http.ReadBlockResource

org.jcoredb.fs.service.http.WriteBlockResource

org.jcoredb.fs.test.FileSystemPerformanceTests

org.jcoredb.fs.test.FileSystemTests

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